JP2006249719A - On-vehicle machine remote control system and on-vehicle machine remote control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyless entry system in which a remote controller always intermittently transmits data inclusive of an ID, an on-vehicle machine achieves synchronization, and the remote controller can receive data in a manner shortening a data receiving period, to thereby save power consumption of the system. <P>SOLUTION: A portable machine 2 or the remote controller has set therein at least receiving timing RT that is not superimposed on transmission of a data signal DATA in a single operation cycle, and when the on-vehicle machine 3 receives the data signals transmitted from the portable machine 2, the on-vehicle machine 3 returns status information indicative of presence of the portable machine within a regular communication zone, to the portable machine 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an in-vehicle device remote operation system such as a keyless entry system and a security system, and an in-vehicle device remote operation method.

  A vehicle system equipped with a vehicle-mounted device that is mounted on a vehicle and sends a control signal to the vehicle or performs an operation independent of the vehicle, and a portable device that communicates with the vehicle-mounted device and determines the operation of the vehicle-mounted device. An example is a keyless entry system or a security system. The keyless entry system system controls the locking (unlocking) / unlocking (unlocking) of the door lock of the vehicle, and the security system connects the in-vehicle devices to the state sensors arranged in each part of the vehicle, and these states The current state of the vehicle is monitored based on a detection signal from the sensor, and a predetermined alarm is issued when an abnormality is detected.

  In the keyless entry system, manual operation of the lock / unlock operation button allows the in-vehicle device to receive the control signal output from the portable device and to output the lock / unlock command signal from the in-vehicle device based on it. There are two types: the door lock is automatically locked (locked) when the owner of the portable device leaves the vehicle, and the door lock is automatically unlocked (unlocked) when approaching the vehicle.

As one type of the latter keyless entry system, whether or not data can be transmitted and received between the portable transmitter (portable device) at hand of the user and the in-vehicle device, and the electric field strength of the received radio wave Based on whether or not the value exceeds the threshold, the approximate location of the user (mobile device), or the user with the mobile device is approaching or away from the vehicle (on-vehicle device) Some of them automatically determine whether or not the vehicle door is locked and unlocked based on the determination result. The communication method between the portable device (remote controller) of the conventional keyless entry system and the vehicle-mounted device in the type that automatically locks / unlocks based on the movement (approach / release) of the user with the portable device, Typically
(A) One-way data communication technology in which the remote controller always transmits data including ID intermittently, and the in-vehicle device side receives data constantly or asynchronously (intermittently) (see Patent Document 1, etc.),
(B) Bidirectional data communication technology that returns a response signal when the in-vehicle device intermittently transmits a request signal (confirmation signal) and the portable device receives the request signal (that is, within a normal communication range) (patent Reference 2 etc.),
It has been known.

In the data communication technique (a) described above, the portable device always transmits data such as ID intermittently, while the in-vehicle device side is always in a receiving state. On the other hand, the technique (b) requires that the portable device is always in a request signal reception state. In particular, a portable device is driven by a button battery because of its character, and thus it is necessary to reduce the power consumption. In transmission / reception used in a keyless entry system, reception requires power several times that of transmission (for example, the transmission circuit current is about 3 mA and the reception circuit current is about 11 mA). From the viewpoint of (a), it can be said that the door is locked or unlocked even in the keyless entry system that can be locked / unlocked automatically only by moving while holding the portable device described above. Since the so-called answer back function for notifying the mobile device is desired, the mobile device side also needs to receive it.
JP 2004-137667 A JP2004-132024A

  The purpose of the present invention is to reduce the power consumption by allowing the remote controller to transmit data including IDs intermittently at all times, to synchronize on the vehicle-mounted device side, and to shorten the data reception period on the remote controller side. Another object of the present invention is to provide an in-vehicle device remote operation system and an in-vehicle device remote operation method.

  The in-vehicle device remote control system of the present invention intermittently transmits a data signal including an ID code and a frame number a plurality of times within one operation cycle, and at least one that does not overlap with the transmission of the data signal within the one operation cycle. A portable device in which a reception window is set, and an in-vehicle device that returns status information indicating that the portable device is within a regular communication range when the portable device receives each data signal intermittently transmitted. This is an in-vehicle device remote control system provided. And when the said vehicle equipment receives each said data signal which the said portable device transmits, it responds synchronizing with the said receiving window based on the timing of each said data signal and the frame number contained in each said data signal It is characterized by.

  In the in-vehicle device remote control system according to the present invention, the portable device does not transmit the data signal and the reception timing does not transmit during the even-numbered or odd-numbered period of the one operation period until the status information is received. It can be set not to be set. Thereby, the power consumption of the portable device can be greatly reduced.

  In the in-vehicle device remote control system according to the present invention, the frame number included in the transmission data of the portable device is used to cause the in-vehicle device to recognize the data reception timing (that is, the in-vehicle device has a data transmission cycle). Used for identification). Thereby, the vehicle-mounted device can return an acknowledge in accordance with the reception timing of the portable device.

One operation cycle of the vehicle-mounted device means that when the vehicle-mounted device intermittently transmits data N times and generates M reception timing (receives M times data), N intermittent transmissions and M times This is the period during which the receiving operation is performed. Usually, the number of data receptions (the number of data reception timings within one operation cycle) is set to be smaller than the number of data transmissions (the number of data transmission timings within one operation cycle) (that is, N> M). .
In the in-vehicle device, data reception is also intermittently performed (that is, the receiving circuit is activated in accordance with the reception timing), so the power consumption of the in-vehicle device is very small.

  In the in-vehicle device remote control system of the present invention, the in-vehicle device transmits an acknowledge (flag (bit or bit string) or the like) including status information to the portable device when the portable device enters a regular communication range. . When the portable device receives an acknowledge from the in-vehicle device, the portable device transmits data including a flag (a predetermined bit or a bit string is set) indicating that the acknowledge has been received to the in-vehicle device.

  In the in-vehicle device remote control system of the present invention, the reception timing of the portable device is one in the one operation cycle before being synchronized with the in-vehicle device, and after being synchronized with the in-vehicle device. Can be plural. At this time, at least a part of the plurality of reception timings after the synchronization is taken may be for receiving an answerback signal from the in-vehicle device.

  In the in-vehicle device remote control system of the present invention, the reception timing of the in-vehicle device can be set for each data signal intermittently transmitted by the portable device after synchronization with the portable device.

  In the vehicle-mounted device remote control system of the present invention, the transmission timing of the vehicle-mounted device may be set in synchronization with at least one of the reception timings of the portable device after being synchronized with the portable device. it can. After synchronization with the portable device, the number of reception timings within the one operation cycle can be increased.

  In the vehicle-mounted device remote control method of the present invention, the data signal including the ID code and the frame number is intermittently transmitted from the portable device a plurality of times within one operation cycle, and the vehicle-mounted device is intermittently transmitted by the portable device. Is received, the vehicle-mounted device remote control method includes performing synchronous communication with the portable device based on the timing of each data signal and the frame number included in each data signal. When at least one reception timing that does not overlap with the transmission of the data signal is set within the one operation cycle, and the in-vehicle device receives each data signal transmitted by the portable device, the portable device is authorized. Status information indicating that the mobile phone is within a communication range is returned to the portable device.

  In the in-vehicle device remote control method of the present invention, the portable device does not transmit the data signal and the reception timing is not during the even-numbered or odd-numbered period of the one operation cycle until the portable device receives the status information. It can be set not to be set.

  In the in-vehicle device remote control method of the present invention, the reception timing of the portable device is one in the one operation cycle before being synchronized with the in-vehicle device, and after being synchronized with the in-vehicle device. Can be plural. In addition, at least a part of the plurality of reception timings after the synchronization is taken can receive an answer back signal from the in-vehicle device.

  In the vehicle-mounted device remote operation method of the present invention, the reception timing of the vehicle-mounted device is set for each data signal intermittently transmitted by the portable device after synchronization with the portable device, and the transmission timing of the vehicle-mounted device is set. Can be set in synchronization with at least one of the reception timings of the portable device after synchronization with the portable device.

  In each of the above-described inventions, the regular communication range is a range in which normal reception is possible, and may be simply within a communicable range (as long as radio waves from the other party can be received), a distance within a certain range, a certain range or more Thus, various conditions such as the electric field strength are satisfied. The conditions when the portable device approaches and when the portable device moves away may be different.

  In the present invention, since the portable device is in a receiving state for only a short time before establishing communication with the in-vehicle device, the power consumption of the portable device can be reduced.

  FIG. 1 is an explanatory diagram showing a configuration of a keyless entry system which is an aspect of the present invention. In FIG. 1, the keyless entry system 1 includes a portable device 2 and an in-vehicle device 3. That is, FIG. 1 is a diagram showing the portable device 2 and the in-vehicle device 3 as functional blocks. The portable device 2 includes a transmission unit 21 and a reception unit 22. The in-vehicle device 3 includes a transmission unit 31, a reception unit 32, and a lock control unit 33.

  FIG. 2 is a hardware block diagram of the portable device 2. The portable device 2 includes a CPU 201, a memory 202, an operation / display device 203, a communication circuit 204, and a transmission / reception antenna 205.

  The memory 202 stores various drivers such as a transmission / reception program, an operation / display program, a manual operation program, a manual / auto switching program, and the like. The functions of the transmission unit 21 and the reception unit 22 in FIG. 1 are achieved by a transmission / reception program stored in the CPU 201, the communication circuit 204, and the memory 202.

  The operation / display device 203 includes a manual / automatic switch. The changeover switch constitutes the manual / automatic changeover unit 23 of FIG. 1 and is set on the manual side to stop the function of the present invention, and when unlocking and locking signals are taken on and off each time, The function of the present invention can be activated by setting to the auto side. Of course, instead of the manual / automatic switching function configured as described above, the function of simply issuing a lock / unlock command signal by manual operation such as pressing of an operation button and the auto function according to the present invention are operated independently. Anyway. Of course, you may comprise only an auto function. In the case of the manual / auto switching function, an independent switch for switching may be provided. When a manual operation button (switch) is operated, the mode is automatically switched to the manual mode. good. In this case, the return to the auto function may be performed after a certain time has elapsed, or a button (switch) for auto activation may be provided.

  Further, the operation / display device 203 can be provided with an indicator for displaying whether the current state is the locked state or the unlocked state.

  FIG. 3 is a hardware block diagram of the in-vehicle device 3. The in-vehicle device 3 includes a CPU 301, a memory 302, an operation / display device 303, a communication circuit 304, and a transmission / reception antenna 305.

  The memory 302 stores various drivers such as a transmission / reception program, an operation / display program, a transmission / reception program, a lock control program, and the like. The functions of the transmission unit 31 and the reception unit 32 in FIG. 1 are achieved by a transmission / reception program stored in the CPU 301, the communication circuit 304, and the memory 302. 1 is achieved by the lock control program stored in the CPU 301 and the memory 302.

  Similar to the operation / display device 203 of the portable device 2 in FIG. 1, the operation / display device 303 can include a manual / auto switch. The operation / display device 303 can be provided with an indicator for displaying whether the operation / display device 303 is currently locked or unlocked.

  The operation of the keyless entry system will be described below with reference to the functional block diagram of FIG. First, a case where the in-vehicle device 3 knows the length of one operation cycle T of the portable device 2 will be described. As shown in FIG. 4A, the transmission unit 21 of the portable device 2 intermittently transmits a data signal DATA including the ID code ID_DATA and the frame number FN_DATA several times within one operation period T. In FIG. 4A, frame numbers are indicated by 0, 1, 2, and 3. In the receiving unit 22 of the portable device 2, at least one reception timing RT that does not overlap with the transmission of the data signal DATA within one operation cycle T is set. FIG. 4A shows the transmission timing ST and the reception timing RT of the data signal DATA before synchronization. Before synchronization, the reception timing RT is once in one operation cycle T. In FIG. 4A, the operation cycle P1 of the portable device 2 is set with a pause period (indicated by P0). Thereby, the power consumption of the portable device 2 is reduced. Note that the four transmission timings ST and one reception timing RT are set at substantially equal time intervals (T / 5).

  In the present embodiment, the transmission / reception timing of the portable device 2 as described above is taken for the following reason. That is, the communication between the portable device 2 and the in-vehicle device 3 in the present embodiment is designed in accordance with the standard for specific low power radio station telecontrol. Although this specific low-power radio can depend on the environment, bi-directional communication of about 500 m to 1 km is possible, but the power consumption is relatively larger than that of using weak radio waves. For this specific low-power radio station telecontrol device, a frequency band that can be used for radio communication is defined by laws and regulations, and a radio signal can be transmitted continuously in one transmission. A possible period (maximum 5 seconds) and a transmission suspension period (minimum 2 seconds) in which transmission is limited within the transmission possible period are defined.

  On the other hand, the portable device 3 is required to be small in size, and its battery (drive source) needs to be driven by a button cell, so that it is necessary to keep power consumption as low as possible. However, if the transmission interval is too long in order to keep the power consumption low, the responsiveness will deteriorate. As a result, for example, when a user who has a portable device approaches the vehicle at a relatively high speed, there is a possibility that the door may remain locked even if it reaches the front of the vehicle door. is there. Therefore, in order to ensure the responsiveness that does not make the user feel uncomfortable, the remote control transmits an unlock signal four times at almost equal intervals (about every 1 second) within one operation cycle and pauses for 2 seconds. ing. During the 2 second pause period, an acknowledge is received once. This reception timing is set at a substantially intermediate position during the pause period. Further, the first transmission timing is slightly delayed (the first and second transmission intervals are less than one second, and the second and subsequent transmission intervals are one second).

  Even if one operation cycle is continuously performed by setting the transmission / reception timing as described above as a process of performing one reception after the four transmissions as described above, a specific low power In accordance with the standard for radio station telecontrol, and in normal times, after executing one operation cycle, a fixed stop period (the same time as the operation cycle) is provided, so the power consumption of the battery of the portable device 2 Can be suppressed as much as possible.

  When the receiving unit 32 receives each data signal intermittently transmitted by the portable device 2, the in-vehicle device 3 is based on the transmission timing ST of each data signal DATA and the frame number included in each data signal. 2 and synchronous communication. When the receiving unit 32 receives each data signal DATA transmitted by the portable device 2, the transmission unit 31 of the in-vehicle device 3 displays status information indicating that the portable device 2 is within the normal communication range of the portable device 2. It is set to return to the receiving unit 22.

  As shown in FIG. 4 (b), the reception cycle of the receiving unit 32 of the in-vehicle device 3 is set to a single operation cycle T multiple times (in this example, before synchronization with the portable device 2). 2 times) reception period is included. 4A and 4B, the transmission timing drawn first on the portable device 2 side and the reception timing drawn first on the in-vehicle device 3 side are shown at substantially the same timing for convenience of illustration. However, in actuality, both of them are operating asynchronously, so that they are not always illustrated.

  FIG. 5 shows a configuration example of the data signal DATA transmitted by the transmission unit 21 of the portable device 2. As shown in FIG. 5, the data signal DATA is composed of “bit synchronization information”, “frame synchronization information”, “ID information”, “control status information, frame number”, and “check bit”. ing.

  As shown in FIG. 6A, the reception timing RT of the receiving unit 22 of the portable device 2 is once before being synchronized with the in-vehicle device 3 (see the operation cycle P1 in FIG. 4A). . The receiving unit 32 of the in-vehicle device 3 receives the frame number 0 and the transmission data DATA of the frame number 2 as shown in FIG. 6B before synchronization with the portable device 2 (operation cycle P1). It is assumed that reception is possible at the timing.

  In FIG. 6B, since the distance between the portable device 2 and the vehicle-mounted device 3 is long, the transmission unit 31 of the vehicle-mounted device 3 cannot receive transmission data at the timing of frame number 0. It is assumed that the in-vehicle device 3 can receive the transmission data at the timing of frame number 2 because the user who has approached the in-vehicle device 3 as it is.

  In this case, since the vehicle-mounted device 3 knows the length of one operation cycle T of the portable device 2, it knows (calculates) the transmission timing st to the portable device 2 from the transmission timing ST of the transmission data of the frame number 2. Acknowledge ACK can be returned to the portable device 2 at this timing. This acknowledge ACK (flag (bit or bit string) or the like) includes status information indicating that the portable device 2 is present within the normal communication range. When the receiving unit 22 of the portable device 2 receives the acknowledge ACK, synchronous communication between the portable device 2 and the in-vehicle device 3 is established.

  The in-vehicle device 3 obtains the next reception timing (the timing at which the device 2 transmits an acknowledge ACK) with the reception of transmission data (with a frame number) from the portable device 2, for example, a frame A table in which the number and the elapsed time from the reception of the transmission data of the frame number to the next reception timing of the portable device 2 are stored and held, and the table may be obtained by referring to the table. Since the time T of the operation cycle P1 is known, it may be calculated each time. Further, as described above, in the present embodiment, only the transmission timing of transmission data with a frame number of 0 is slightly shifted. Therefore, when the frame number is from 1 to 4, the transmission interval is fixed to T / 5 (for example, 1 second), so that the calculation is based on the transmission interval. When the frame number is 0, correction based on the amount of deviation is performed. By doing so, the calculation process can be easily performed.

  In the receiving unit 22 of the portable device 2, after receiving an acknowledge from the in-vehicle device 3 and being synchronized with the in-vehicle device 3 (operation cycle P <b> 2), the portable device 2 is intermittent after the reception timing (opening the reception window). It is set for each data signal DATA to be transmitted (for each transmission timing ST). In FIG. 6A, this reception timing is indicated by RT ′. The reception timing RT ′ is a reception window for the portable device 2 to receive an answer back from the in-vehicle device 3, and is provided at an interval of about 1 second (following the transmission timing ST) separately from the acknowledge reception window RT. .

  That is, in the keyless entry system according to the present embodiment, when the portable device 2 receives the acknowledge, it can be recognized that the portable device 2 exists within the communication range of the in-vehicle device 3 and can be synchronized. . Then, the lock control unit 33 unlocks when the portable device 2 is closer to the vehicle-mounted device 3 than the position X within the communication range, and locks when the portable device 2 is separated from the vehicle-mounted device 3 than the position Y that is opposite. To control. Along with the output of the control signal for unlocking / locking, the in-vehicle device 3 transmits to the portable device 2 that the processing has been performed as an answerback signal. Therefore, this answer back signal is sent in accordance with the reception timing RT ′ of the portable device. The positions X and Y are actually determined based on the electric field strength when the transmission data from the portable device 2 is received, as will be described later. The positions X and Y (threshold value of electric field strength) may be the same or different.

  When the portable device 2 receives this answerback signal, the portable device 2 performs a predetermined notification, and can inform the user carrying the portable device 2 that the locking and unlocking has been performed. As a method of notification, for example, various notification means such as a buzzer, a sound, or lighting or blinking of a lamp can be operated. In addition, since the time for the portable device 2 to approach and separate from the in-vehicle device 3 is small as a whole, the proportion of the total power consumption is negligible.

  Since the receiver 32 of the in-vehicle device 3 knows the transmission timing of the portable device 2 after being synchronized with the portable device 2 (operation cycle P2), as shown in the operation cycle P3 of FIG. In addition, reception is performed at the timing of transmission data DATA of frame numbers 0, 1, 2, and 3.

  Next, a case where the in-vehicle device 3 does not know the length of one operation cycle T of the portable device 2 will be described. Also in this case, the transmission unit 21 of the portable device 2 intermittently transmits the data signal DATA including the ID code ID_DATA and the frame number FN_DATA a plurality of times within one operation period T as illustrated in FIG. 7A, the frame numbers are indicated by 0, 1, 2, and 3, and the receiving unit 22 of the portable device 2 has at least one reception timing RT that does not overlap with the transmission of the data signal DATA within one operation period T. Is set. The operation of the portable device 2 illustrated in FIG. 7A is the same as the operation of the portable device 2 illustrated in FIG. Moreover, the operation | movement before the synchronization of the portable device 2 shown in FIG.7 (b) is the same as the operation | movement of the portable device 2 shown in FIG.4 (b). The configuration of the data signal DATA transmitted by the transmission unit 21 of the portable device 2 can be the same as that shown in FIG.

  As shown in FIG. 8A, the reception timing RT of the receiving unit 22 of the portable device 2 is once before being synchronized with the in-vehicle device 3 (see the operation cycle P1 in FIG. 7A). . The receiver 32 of the in-vehicle device 3 receives the transmission data DATA of the frame number 0 and the frame number 2 as shown in FIG. 8B before synchronizing with the portable device 2 (operation cycle P1). ing. The transmission unit 31 of the in-vehicle device 3 can know the transmission timing st to the portable device 2 from the transmission data timing of the frame number 0 and the transmission timing ST of the transmission data of the frame number 2, and at this timing Return Acknowledge ACK to the portable device 2. This acknowledge ACK (flag (bit or bit string) or the like) includes status information indicating that the portable device 2 is in a normal communication range. When the receiving unit 22 of the portable device 2 receives the acknowledge ACK, synchronous communication between the portable device 2 and the in-vehicle device 3 is established.

  In the receiving unit 22 of the portable device 2, after the vehicle-mounted device 3 is synchronized (operation cycle P <b> 2), the reception timing is set for each data signal DATA intermittently transmitted by the portable device 2 (for each transmission timing ST). Set). In FIG. 8A, this reception timing is indicated by RT ′. Since the receiving unit 32 of the in-vehicle device 3 knows the transmission timing of the portable device 2 after synchronizing with the portable device 2 (operation cycle P2), as shown in P3 of FIG. Reception is performed at the timing of the transmission data DATA of the frame numbers 0, 1, 2, and 3.

  After the vehicle-mounted device 3 knows the length of one operation cycle T of the portable device 2 (FIGS. 4 and 5), or after the vehicle-mounted device 3 is synchronized with the length of one operation cycle T of the portable device 2 After synchronization in the case of not knowing (FIGS. 6 and 7), the transmission timing is synchronized with at least one of the reception timings RT ′ of the portable device 2, as shown in FIG. 9B. Is set.

  This transmission timing is indicated by st ′. In addition, the transmission / reception timing in P3 of the portable device 2 in FIG. 9A is the same as the transmission / reception timing in P3 in FIGS. 6A and 8A.

  Here, in addition to the transmission timing st transmitted according to the reception timing RT, the transmission unit 31 of the portable device 2 receives the reception timing RT ′ set according to the transmission data DATA of the frame number 2 of the portable device 2. A transmission timing st ′ to be transmitted is set accordingly.

  In the present embodiment, in the case where there are a plurality of portable devices 2, when synchronous communication is established between the portable device 2 and the in-vehicle device 3, the in-vehicle device 3 communicates with another portable device 2 in synchronous communication. Never do.

  The lock control unit 33 of the in-vehicle device 3 can determine whether the portable device 2 is approaching or away from the vehicle based on the radio wave intensity or the like. When the portable device 2 is within the communication range from the outside of the communication range, a control signal for unlocking the vehicle door lock is output when the first radio field strength setting value is exceeded, and the second radio field strength setting value The control signal for locking the door of the vehicle can be output when the value falls below (in this case, [first radio wave intensity setting value] <[second radio wave intensity setting value]).

  In the embodiment described above, an example applied to a keyless entry system has been shown. However, the present invention is not limited to this, for example, how to synchronize a portable device and an in-vehicle device in a security system, an answer back It can be applied to various systems such as signal transmission.

It is explanatory drawing which shows the structure of the keyless entry system which is 1 aspect of this invention. It is a hardware block diagram which shows the structure of a portable machine in the keyless entry system which is 1 aspect of this invention. It is a hardware block diagram which shows the structure of a vehicle side machine in the keyless entry system which is 1 aspect of this invention. It is explanatory drawing of the transmission / reception signal when an in-vehicle device knows one operation cycle of the portable device, (A) is a diagram showing the transmitted / received signal on the portable device side before synchronization, and (B) is in the in-vehicle device before synchronization. It is a figure which shows a transmission / reception signal. It is explanatory drawing of the transmission / reception signal in case an onboard equipment knows one operation cycle of a portable device, (A) is a figure which shows the transmission / reception signal of the portable device at the time of synchronization establishment, (B) is the case of synchronization establishment It is a figure which shows the transmission / reception signal by the side of the vehicle equipment. It is a figure which shows the structural example of the data signal which the transmission part of a portable device transmits. It is explanatory drawing of the transmission / reception signal when an in-vehicle device does not know one operation cycle of a portable device, (A) shows a transmission / reception signal on the portable device side before synchronization, and (B) shows transmission / reception in the in-vehicle device before synchronization. It is a figure which shows a signal. It is explanatory drawing of the transmission / reception signal when an in-vehicle device does not know one operation cycle of the portable device, (A) is a diagram showing the transmission / reception signal on the portable device side at the time of synchronization establishment, (B) is at the time of synchronization establishment It is a figure which shows the transmission / reception signal by the vehicle equipment side. (A) is a figure which shows the transmission / reception signal to the portable device side after synchronization, (B) is a figure which shows the transmission / reception signal in the vehicle equipment after synchronization.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Keyless entry system 2 Portable machine 3 Car-mounted machine 21 Transmission part 22 Reception part 23 Manual / auto switching part 31 Transmission part 32 Reception part 33 Lock control part 201,301 CPU
202, 302 Memory 203, 303 Operation / display device 204, 304 Communication circuit 205, 305 Transmission / reception antenna

Claims (10)

A mobile device in which a data signal including an ID code and a frame number is intermittently transmitted a plurality of times within one operation cycle, and at least one reception window that does not overlap with the transmission of the data signal is set within the one operation cycle;
When receiving each data signal intermittently transmitted by the portable device, an in-vehicle device that returns status information indicating that the portable device is within a regular communication range;
An in-vehicle device remote control system comprising:
When the in-vehicle device receives each data signal transmitted by the portable device,
A vehicle-mounted remote control system characterized by responding in synchronization with the reception window based on the timing of each data signal and the frame number included in each data signal.   2. The portable device does not transmit the data signal and does not set the reception timing during an even-numbered period or an odd-numbered period of the one operation period until the status information is received. The in-vehicle device remote control system described in 1.   The reception timing of the portable device is one before the synchronization with the in-vehicle device, and is plural after the synchronization with the in-vehicle device. Item 3. The in-vehicle device remote control system according to Item 1 or 2.   The in-vehicle device remote control system according to claim 3, wherein at least a part of the plurality of reception timings after the synchronization is taken is for receiving an answer back signal from the in-vehicle device. . The reception timing of the in-vehicle device is set for each data signal intermittently transmitted by the portable device after synchronization with the portable device,
The transmission timing of the in-vehicle device is set in synchronization with at least one of the reception timings of the portable device after being synchronized with the portable device.
The in-vehicle device remote control system according to any one of claims 1 to 4, wherein A data signal including an ID code and a frame number is intermittently transmitted a plurality of times within one operation cycle from the portable device, and at least one reception window that does not overlap with the transmission of the data signal is set within the one operation cycle,
When the in-vehicle device receives each data signal transmitted by the portable device, a function of returning status information indicating that the portable device is within a normal communication range to the portable device;
An in-vehicle device remote control method comprising:
When the in-vehicle device receives each data signal transmitted by the portable device, it responds in synchronization with the reception window based on the timing of each data signal and the frame number included in each data signal.
In-vehicle device remote control method characterized by the above.   The portable device does not transmit the data signal and does not set the reception timing during an even-numbered or odd-numbered period of the one operation cycle until the status information is received. The in-vehicle device remote control method described in 1.   The reception timing of the portable device is one before the synchronization with the in-vehicle device, and is plural after the synchronization with the in-vehicle device. Item 8. The on-vehicle device remote control method according to Item 6 or 7.   9. The vehicle-mounted device remote operation method according to claim 8, wherein at least a part of the plurality of reception timings after the synchronization is taken receives an answer-back signal from the vehicle-mounted device. The reception timing of the in-vehicle device is set for each data signal intermittently transmitted by the portable device after synchronization with the portable device,
The transmission timing of the in-vehicle device is set in synchronization with at least one of the reception timings of the portable device after being synchronized with the portable device.
The in-vehicle device remote operation method according to any one of claims 6 to 9, wherein

Images