JP6040127B2 - Vehicle remote control system, in-vehicle repeater, and portable repeater - Google Patents

Description

  The present invention relates to a vehicle remote control system, an in-vehicle relay device, and a portable relay device that remotely control a predetermined device of a vehicle.

  A vehicle control system for starting various devices such as a vehicle engine in response to a driver's operation includes a vehicle control device mounted in the vehicle and a remote control key that can be carried by the vehicle driver. It is configured. When the driver inserts the remote control key into the key cylinder of the vehicle, the vehicle control device acquires the authentication information stored in an encrypted state in the remote control key by wireless communication, and this authentication information is transmitted to the vehicle control device. The vehicle control device performs control such as starting of the engine on the condition that it matches the stored authentication information.

  Also, in recent years, keyless entry type vehicle control in which wireless communication of authentication information is performed only by getting into the vehicle with the driver holding the remote control key even if the driver does not insert the remote control key into the key cylinder. Systems are also becoming popular. In such a vehicle control system, the vehicle control device wirelessly transmits a response request signal into the vehicle at LF (Low Frequency), and the remote control key that wirelessly received the response request signal transmits a response signal including authentication information to UHF (Ultra Wireless transmission at high frequency). The vehicle control device that wirelessly received the response signal performs control such as engine start on the condition that the authentication information included in the response signal matches the authentication information stored in the vehicle control device. Do.

  In addition, for vehicles equipped with such various vehicle control systems, vehicle remote control for operating various devices such as engines and air conditioners from outside the vehicle for various purposes such as warm-up operation in cold regions. Systems (engine starters) are also becoming popular. This vehicle remote control system includes an in-vehicle device connected to a vehicle control device and a portable device that can be carried by a driver. In the in-vehicle device, the authentication information stored in the remote control key is decoded and stored in advance. When the driver operates the portable device outside the vehicle, the portable device wirelessly communicates an operation signal to the vehicle-mounted device, and the vehicle-mounted device transmits the authentication information stored in itself to the vehicle control device, etc. The engine can be started through the device.

  However, in recent years, since the encryption strength of authentication information stored in the remote control key tends to increase, the processing load and time required to decrypt the authentication information also tend to increase. It is becoming difficult to construct a vehicle remote control system based on the above. For this reason, it has been desired to construct a vehicle remote control system that does not require decoding of authentication information stored in the remote control key.

  Therefore, in order to deal with such a problem, a vehicle remote control system that does not require decoding of authentication information has been proposed. For example, this vehicle remote control system is configured to include a portable device owned by a driver and an in-vehicle device mounted on a car, and the in-vehicle device is supplied with power to a remote control key (genuine portable device). And a MPU for controlling power supply to the remote control key by the power supply means. Then, when the driver performs an engine start operation using the portable device, by turning on the power supply from the MPU to the remote control key, the authentication information is output from the remote control key to the vehicle control system, and the engine is started. (See, for example, Patent Document 1).

JP 2011-27002 A

  However, in the conventional vehicle remote control system as disclosed in Patent Document 1, it is possible to remotely control the vehicle without decoding the authentication information stored in the remote control key. It was necessary to connect to the power supply means, and it was necessary to always keep the remote control key in the car. However, when the remote control key is always placed in the vehicle in this way, an intruder who has illegally entered the vehicle by breaking the window glass of the vehicle, etc., abuses the remote control key placed in the vehicle. There was a concern that the risk of crime prevention would increase such as the possibility of theft of the vehicle.

  In view of such a point, the inventor of the present application has created a vehicle remote control system that can remotely control a vehicle while maintaining high crime prevention performance regardless of the encryption strength of authentication information. This vehicle remote control system is configured as a system including an in-vehicle relay device that can communicate with a vehicle control device and a portable relay device that can communicate with a portable device (remote control key). The transmitted response request signal is received and wirelessly transmitted to the portable repeater, and the response signal wirelessly transmitted from the portable repeater is received and transmitted to the vehicle control device. The portable repeater receives the response request signal wirelessly transmitted from the in-vehicle repeater and transmits the response request signal to the portable device, and receives the response signal transmitted from the portable device based on the response request signal and wirelessly transmits the response request signal to the in-vehicle repeater. Send. In this system, the response request signal transmitted from the vehicle control device is relayed to the portable device via wireless communication between the in-vehicle relay device and the portable relay device, and the response signal transmitted from the portable device based on the response request signal is transmitted. Necessity of decrypting authentication information stored in the portable device by relaying to the vehicle control device via wireless communication between the portable relay device and the in-vehicle relay device, and the necessity of always keeping the portable device in the vehicle This makes it possible to remotely operate a predetermined device of the vehicle while maintaining high security performance regardless of the encryption strength of the authentication information. In particular, wireless communication between an in-vehicle relay device and a portable relay device is performed at a UHF band frequency (for example, 920 MHz), thereby extending the communication distance as compared with a case of performing at an LF band frequency (for example, 125 kHz). It is possible to remotely control the vehicle from a relatively distant place.

  However, in such a vehicle remote control system, when it takes a relatively long time to relay each signal, it may be difficult to remotely control a predetermined device of the vehicle as a result. That is, in recent vehicle control systems, for the purpose of improving crime prevention or the like, the signal communication time (for example, in the vehicle control device, from wireless transmission of a response request signal to wireless reception of the response signal) A vehicle control system has been proposed in which the vehicle control device performs control such as starting of the engine on the condition that the time required for the above is within a predetermined time. When the vehicle remote control system described above is attached to such a vehicle control system, if a relatively long time is required for wireless communication between the in-vehicle repeater and the portable repeater, one of the conditions is not satisfied. Therefore, there is a possibility that the vehicle control device cannot be controlled to start the engine. In particular, when wireless communication between an in-vehicle relay device and a portable relay device is performed at a frequency in the UHF band, it is necessary to perform carrier sense required by the standard of wireless equipment. Therefore, it may be more difficult to remotely control a predetermined device of the vehicle.

  In order to avoid such problems, it may be possible to shorten the time required for wireless communication by simplifying the processing required for wireless communication, but in this case, There was a possibility that a new problem that reliability and quality could be lowered occurred.

  The present invention has been made in view of the above, and in the case where wireless communication is performed using an in-vehicle relay device and a portable relay device, the time required for wireless communication is shortened as compared with the prior art, thereby ensuring reliable vehicle control. Vehicle remote control system and portable relay that can improve the reliability and quality of wireless communication even when the time required for wireless communication is shorter than before The purpose is to provide a machine.

In order to solve the above-described problems and achieve the object, a vehicle remote control system according to claim 1 is a vehicle control system configured to enable wireless communication between a vehicle control device and a portable device. Based on a response request signal wirelessly transmitted from the vehicle control device, the portable device wirelessly transmits a response signal and receives the response signal, and the vehicle control device controls a predetermined device of the vehicle. A vehicle remote control system for remotely operating the predetermined device via a vehicle control system, comprising: an in-vehicle relay device capable of communicating with the vehicle control device; and a portable relay device capable of communicating with the portable device; The in-vehicle repeater receives the response request signal transmitted from the vehicle control device and wirelessly transmits the response request signal to the portable repeater, and the wirelessly transmitted response from the portable repeater. A transmission / reception unit configured to receive a signal and transmit the signal to the vehicle control device, wherein the portable relay receives the response request signal wirelessly transmitted from the in-vehicle relay and transmits the response request signal to the portable device; A transmission / reception unit that receives the response signal transmitted from the machine based on the response request signal and wirelessly transmits the response signal to the in-vehicle relay unit, and the transmission / reception unit of the portable relay unit wirelessly communicates with the portable unit. Basic transmission / reception means for performing communication and relay transmission / reception means for performing wireless communication with the in-vehicle relay device, wherein the basic transmission / reception means in the transmission / reception means of the portable relay device is transmitted from the in-vehicle relay device A response request signal transmitting circuit for wirelessly transmitting a response request signal to the portable device; and a response signal receiving circuit for receiving a response signal wirelessly transmitted from the portable device; When the transmission / reception means determines that transmission of the response signal from the portable device has been started, a circuit connected to the relay transmission / reception means without waiting for completion of reception of all the response signals. By switching from the response request signal transmitting circuit to the response signal receiving circuit, the signal transmission / reception state of the portable relay device to the in-vehicle relay device is switched from the reception state to the transmission state .

The vehicle remote control system according to claim 2 is the vehicle remote control system according to claim 1 , wherein the transmission / reception means of the portable repeater detects a reception intensity of the response signal transmitted from the portable device. When the detected reception intensity becomes equal to or higher than a predetermined intensity, the circuit connected to the relay transmission / reception means is switched from the response request signal transmission circuit to the response signal reception circuit .

The vehicle remote control system according to claim 3 is the vehicle remote control system according to claim 1 or 2 , wherein the transmission / reception means of the portable repeater receives all the response signals transmitted from the portable device. Without waiting for completion , carrier sense for wireless transmission of the response signal to the in-vehicle repeater is started .

The mobile relay device of the vehicle remote control system according to claim 4 is a vehicle control system configured to enable wireless communication between the vehicle control device and the mobile device, and a response request wirelessly transmitted from the vehicle control device. Based on the signal, the portable device wirelessly transmits a response signal, and the vehicle control device controls the predetermined device of the vehicle on the basis of at least one of the conditions that the response signal is received. A mobile relay device for configuring a vehicle remote control system for remotely operating a device, the mobile relay device configured to be communicable with the mobile device, and constituting the vehicle remote control system together with the mobile relay device. And configured to be communicable with an in-vehicle relay that is communicable with the vehicle control device, and receives the response request signal wirelessly transmitted from the in-vehicle relay to the portable device While signal, comprising a receiving means for wirelessly transmitting to the vehicle-mounted repeater to receive the response signals transmitted on the basis of the response request signal from the portable unit, the transceiver unit, with the mobile device Basic transmission / reception means for performing wireless communication and relay transmission / reception means for performing wireless communication with the in-vehicle relay, wherein the basic transmission / reception means in the transmission / reception means receives a response request signal transmitted from the in-vehicle relay. A response request signal transmitting circuit for wirelessly transmitting to the portable device; and a response signal receiving circuit for receiving a response signal wirelessly transmitted from the portable device, wherein the transmission / reception means transmits a response signal from the portable device. If it is determined that the response request signal has been started, a circuit connected to the relay transmission / reception means is connected to the response request signal transmission circuit without waiting for completion of reception of all the response signals. By switching to the response signal receiving circuit from the switches to the transmission state transmitting and receiving state of a signal to the vehicle-mounted repeater unit in the portable repeater from the receive state.

The mobile relay device of the vehicle remote control system according to claim 5 is the mobile relay device of the vehicle remote control system according to claim 4 , wherein the transmission / reception means receives the response intensity of the response signal transmitted from the mobile device. When the detected reception intensity becomes equal to or higher than a predetermined intensity, the circuit connected to the relay transmission / reception means is switched from the response request signal transmission circuit to the response signal reception circuit .

The mobile relay device of the vehicle remote control system according to claim 6 is the mobile relay device of the vehicle remote control system according to claim 4 or 5 , wherein the transmission / reception means receives the response signal transmitted from the mobile device. The carrier sense for wirelessly transmitting the response signal to the in- vehicle relay device is started without waiting for the completion of reception .

Vehicle remote control system according to claim 1, or according to the portable repeater of vehicle remote control system according to claim 4, without waiting for completion of reception of the response signal transmitted from the portable device, a portable repeater Since the transmission / reception state of the signal to the on-vehicle repeater is switched from the reception state to the transmission state , wireless transmission can be started more quickly than when the internal circuit is switched after waiting for the completion of reception of the response signal. And the possibility of satisfying the time condition can be improved.

According to the vehicle remote control system according to claim 2 or the mobile relay device of the vehicle remote control system according to claim 5, when the reception strength of the response signal transmitted from the mobile device becomes equal to or higher than a predetermined strength. Since the transmission / reception state of the signal to the in-vehicle relay unit in the portable relay unit is switched from the reception state to the transmission state , even when switching based on the analysis of the response request signal cannot be performed, the internal circuit It becomes possible to determine the switching timing.

Vehicle remote control system according to claim 3, or according to the portable repeater of vehicle remote control system according to claim 6, without waiting for the finish to receive all the response signals transmitted from the portable device, the since starting the carrier sense for wireless transmission to the vehicle-mounted repeater of the response signal, as compared with the case of starting the carrier sense after waiting for completion of reception of the response signal, quickly performed that the initiation of wireless transmission The possibility of satisfying the time condition can be further improved.

It is a block diagram which shows the vehicle remote control system which concerns on embodiment of this invention with a vehicle control system. It is a flowchart of a vehicle remote control process. FIG. 3 is a flowchart of a vehicle remote operation process continued from FIG. 2. It is a conceptual diagram for demonstrating transmission / reception of the signal using an envelope.

Embodiment
Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. However, the present invention is not limited by this embodiment.

(Overview)
Initially, the outline | summary of the vehicle remote control system which concerns on this Embodiment is demonstrated. FIG. 1 is a block diagram showing a vehicle remote control system 1 according to the present embodiment together with a vehicle control system 100.

  The “vehicle remote operation system” 1 is a system for remotely operating a predetermined device via a vehicle control system 100 that controls the predetermined device of the vehicle. Here, the “vehicle control system” 100 is a system configured such that the vehicle control device 110 and the portable device 120 can communicate with each other wirelessly. The “vehicle control device” 110 is a device installed in the vehicle to control predetermined equipment of the vehicle, and can communicate with an ECU (Engine Control Unit) via a CAN (Controller Area Network) or the like, for example. It is a device connected by wire. The “portable device” 120 is a so-called remote control key that can be carried by the driver to control a predetermined device of the vehicle via the vehicle control device 110. Here, the specific type of the “predetermined device” and the specific control content for the predetermined device are arbitrary, such as engine start and stop, air conditioner start and stop, door lock and unlock, This includes activation and cancellation of the security system, output of various vehicle information such as room temperature in the vehicle, and the like. Hereinafter, a case where “engine start” is performed will be exemplified.

  As a known process for starting the engine, the vehicle control system 100 performs the following process. That is, in this process, an “activation sequence” for the vehicle control device 110 to confirm the presence of the portable device 120 in the vehicle and an “authentication sequence” for the vehicle control device 110 to authenticate the portable device 120 are sequentially executed. Is done.

  In the “start-up sequence”, when a predetermined start-up operation based on a driver or an arbitrary event (hereinafter, an operation of an engine start switch in a vehicle by a driver) is performed, from the device or the like on which the start-up operation is performed A start start output is performed, and this start start output is input to the vehicle control device 110 by wire. On the condition that the start start output is input in this way, the vehicle control device 110 wirelessly transmits an activation response request signal at a response request frequency. Here, the “activation response request signal” is a signal for requesting a response from the vehicle control device 110 to the portable device 120, and its format and information content are arbitrary. The “response request frequency” is, for example, a frequency that can be adjusted so that the transmission range is only in the vehicle. In this case, the portable device 120 owned by the driver is within a predetermined range with respect to the vehicle control device 110 ( Typically, the activation response request signal is received by the portable device 120 only when it exists in the vehicle).

  The portable device 120 that has received the activation response request signal wirelessly transmits the activation response signal at the response frequency. Here, the “activation response signal” is a signal for notifying the vehicle control device 110 from the portable device 120 that the valid portable device 120 has received the activation response request signal transmitted from the vehicle control device 110. The format and information content are arbitrary. For example, the authentication information stored in the portable device 120 can be included in the activation response signal and transmitted. When receiving the activation response signal, the vehicle control device 110 analyzes the activation response signal, determines whether or not a predetermined authentication sequence start condition is satisfied, and when the predetermined authentication sequence start condition is satisfied Only to the authentication sequence.

  The “authentication sequence” performs the same communication as the activation sequence, and points that are not particularly described can be described as “activation” in the description of the activation sequence being replaced with “authentication”. That is, the vehicle control device 110 wirelessly transmits an authentication response request signal at a response request frequency. The portable device 120 that has received this authentication response request signal wirelessly transmits the authentication response signal at the response frequency. The vehicle control device 110 that has received the authentication response signal analyzes the authentication response signal, determines whether or not a predetermined control condition is satisfied, and turns on the engine only when the predetermined control condition is satisfied. Predetermined control for starting is performed.

  Although the specific content of the “control condition” is arbitrary, in the following, 1) the operation of the engine start switch (ignition switch) of the vehicle and the operation of the brake are performed (hereinafter, “operation completion condition”), 2 ) That the authentication information included in the authentication response signal matches the authentication information stored in advance in the vehicle control device 110 (hereinafter referred to as “authentication information matching condition”); and 3) predetermined after the activation response request signal is transmitted. Within a predetermined time (for example, a predetermined time between 300 to 500 μsec., Hereinafter referred to as “condition satisfaction time”), the satisfaction of the above conditions 1) and 2) was confirmed and the authentication response signal was received (hereinafter referred to as “the condition satisfaction time”). , Time conditions) will be described as control conditions. Regarding the condition 2) above, the authentication information may actually be changed every time by a known rolling code process, and the present invention can be similarly applied to such a case. Hereinafter, a case where authentication information is fixed will be described.

  On the other hand, in FIG. 1, the “vehicle remote operation system” 1 is a system for remotely operating a predetermined device via the vehicle control system 100 that controls the predetermined device of the vehicle as described above. This vehicle remote control system 1 is a system configured such that the in-vehicle repeater 10 and the portable repeater 20 can wirelessly communicate with each other. Details of these units will be described later.

  In the following description, when wirelessly performing communication, transmission, or reception of signals or information between a plurality of devices, it is specially described as “wireless communication”, “wireless transmission”, or “wireless reception”. However, if there is no special note, it can be performed either wirelessly or by wire. In addition, regarding the wireless communication method between a plurality of devices, “simple communication method” means a method in which only one-way communication from one device to the other device is performed using one frequency. "Semi-recovery method" means a method that uses one frequency for communication in the direction from one device to the other device and vice versa, and "recovery method" means one device It means a method of performing communication in the direction from one device to the other device and communication in the opposite direction using two frequencies. In the present embodiment, a case will be described in which wireless communication between the in-vehicle repeater 10 and the portable repeater 20 is performed by a semi-recovery method. In addition, when it is not necessary to distinguish between the “activation response request signal” and the “authentication response request signal”, they are collectively referred to as “response request signal”. Similarly, “activation response signal” and “authentication response signal” are collectively referred to as “response signal” when it is not necessary to distinguish them from each other.

(Configuration-vehicle control system-vehicle control device)
Next, configurations of the vehicle control system 100 and the vehicle remote control system 1 will be described. First, the configuration of the vehicle control system 100 will be described. The vehicle control device 110 of the vehicle control system 100 includes a basic transmission / reception circuit 111. The basic transmission / reception circuit 111 is basic transmission / reception means for transmitting / receiving a response request signal and a response signal (hereinafter, the same applies to basic transmission / reception circuits 13, 23, and 121 to be described later). A response request signal transmission circuit 112 for wireless transmission and a response signal reception circuit 113 for receiving a response signal transmitted at a response frequency are provided. Moreover, although illustration is abbreviate | omitted, the vehicle control apparatus 110 for MPU (Micro Processing Unit) which controls each part of the said vehicle control apparatus 110, the memory | storage part which memorize | stores authentication information non-volatilely, and performing wireless communication An antenna and a contact terminal for receiving wired output from various devices of the vehicle are provided. The contact terminal includes an engine operation contact terminal for receiving an output when the vehicle engine start switch is operated (hereinafter referred to as an engine start operation output), and an output when the vehicle brake is operated (hereinafter referred to as a brake operation output). ) Is provided. However, since the vehicle control device 110 can be configured in the same manner as in the prior art, a detailed description thereof will be omitted.

(Configuration-Vehicle control system-Mobile device)
A portable device (remote control key) 120 of the vehicle control system 100 includes a basic transmission / reception circuit 121. The basic transmission / reception circuit 121 includes a response request signal reception circuit 122 that receives a response request signal transmitted at a response request frequency, and a response signal transmission circuit 123 that wirelessly transmits the response signal at the response frequency. Although not shown, the portable device 120 includes an IC (Integrated Circuit) and various filters, a storage unit that stores authentication information in a nonvolatile manner, an antenna for performing wireless communication, and a battery that serves as a power source. Is provided. However, since the portable device 120 can be configured in the same manner as in the past, a detailed description thereof will be omitted.

(Configuration-Vehicle remote control system-Onboard repeater)
Next, the configuration of the vehicle remote control system 1 will be described. First, the in-vehicle repeater 10 will be described. The in-vehicle repeater 10 includes a transmission / reception circuit 11 for communicating with the vehicle control device 110 and the portable repeater 20, and an output unit 12.

  Specifically, the transmission / reception circuit 11 includes a basic transmission / reception circuit 13 and a relay transmission / reception circuit 14. The basic transmission / reception circuit 13 is basic transmission / reception means for performing wireless communication with the vehicle control device 110, and receives a response request signal wirelessly transmitted from the vehicle control device 110 at a response request frequency. And a response signal transmission circuit 16 for wirelessly transmitting the response signal transmitted from the portable repeater 20 to the vehicle control device 110 at a response frequency. The relay transmission / reception circuit 14 is a relay transmission / reception unit that performs wireless communication with the mobile relay device 20 and receives an operation signal and a response signal wirelessly transmitted from the mobile relay device 20 at a predetermined first relay frequency. 1 relay receiving circuit 17 and a first relay transmitting circuit 18 for wirelessly transmitting the response request signal received by the response request signal receiving circuit 15 to the portable repeater 20 at the first relay frequency.

  The output unit 12 is an output unit that outputs to the vehicle control device 110 a condition output that constitutes a control condition for a predetermined device of the vehicle. In the present embodiment, the output unit 12 outputs an engine start operation output and a brake operation output. More specifically, although not shown, the in-vehicle relay machine 10 is provided with an engine operation contact terminal for performing an engine start operation output and a brake operation contact terminal for performing a brake operation output, The engine operation contact terminal is wired to the engine operation contact terminal of the vehicle control device 110, and the brake operation contact terminal is wired to the brake operation contact terminal of the vehicle control device 110. Then, the output unit 12 outputs an engine start operation output via the engine operation contact terminal, and outputs a brake start operation output via the brake operation contact terminal. In addition, although the specific communication system of such an output part 12 and the vehicle control apparatus 110 is arbitrary, for example, UART communication is performed. Moreover, although illustration is abbreviate | omitted, the vehicle-mounted relay machine 10 is actually provided with CPU, IC, various filters, the memory | storage part which memorize | stores authentication information in non-volatile, and the antenna for performing wireless communication. In addition, the power supply with respect to the vehicle-mounted repeater 10 is acquired from a vehicle by a well-known method.

(Configuration-Vehicle remote control system-Mobile repeater)
The mobile relay device 20 of the vehicle remote control system 1 includes an operation switch 21 and a transmission / reception circuit 22 for communicating with the mobile device 120 and the in-vehicle relay device 10.

  The operation switch 21 is an operation means for receiving an operation instruction for a predetermined device of the vehicle. In the present embodiment, the operation switch 21 is an engine start switch for receiving an operation instruction for starting the engine of the vehicle. It is configured as a push button switch.

  Specifically, the transmission / reception circuit 22 includes a basic transmission / reception circuit 23 and a relay transmission / reception circuit 24. The basic transmission / reception circuit 23 is basic transmission / reception means for performing wireless communication with the portable device 120, and is a response request signal for wirelessly transmitting a response request signal transmitted from the in-vehicle relay device 10 to the portable device 120 at a response request frequency. A transmission circuit 25 and a response signal transmission circuit 26 that receives a response signal wirelessly transmitted at a response frequency based on the response request signal from the portable device 120 are provided. The relay transmission / reception circuit 24 is a relay transmission / reception unit that performs wireless communication with the in-vehicle relay device 10 and wirelessly transmits an operation signal and a response signal to the first relay reception circuit 17 of the in-vehicle relay device 10 at the first relay frequency. A first relay transmission circuit 27 that receives the response request signal that is wirelessly transmitted at the first relay frequency from the first relay transmission circuit 18 of the in-vehicle relay device 10. Moreover, although illustration is abbreviate | omitted, the portable relay machine 20 is actually provided with CPU, IC, various filters, the antenna for performing wireless communication, and the battery used as a power supply. The portable repeater 20 configured as described above is held at a position close to the portable device 120 so that wireless communication with the portable device 120 at the response request frequency is possible. For example, as a device for performing such holding, a hole for inserting a key holder ring is formed in the casing of the portable relay machine 20, and the portable key 120 ring is shared between the portable machine 120 and the portable relay machine 20. It becomes possible to hold | maintain the portable relay machine 20 in the position near with respect to the portable device 120 easily by hold | maintaining by.

(frequency)
Next, the frequency used for wireless communication will be described. The response request frequency and the response frequency used in wireless communication between the vehicle control device 110 and the in-vehicle relay device 10 and between the portable device 120 and the portable relay device 20 are the vehicle control device 110 and the portable device 120, respectively. The frequency is set to the same frequency as the response request frequency and response frequency used in wireless communication between the two. Here, when these response request frequencies and response frequencies differ depending on vehicle manufacturers and vehicle types, these frequencies are specified in advance for each vehicle by a test, and the vehicle manufacturer that installs the vehicle remote control system 1 The frequency corresponding to the vehicle type is set in the in-vehicle repeater 10 and the portable repeater 20. In the following description, it is assumed that the response request frequency is LF (specifically 125 kHz) and the response frequency is UHF (more generally RF (Radio Frequency), specifically 315 MHz).

  In addition, as the first relay frequency, any frequency can be set as long as it is a frequency that enables communication with the in-vehicle repeater 10 in the vehicle even when the portable repeater 20 is outside the vehicle. it can. However, it is preferable to use a frequency higher than LF as the first relay frequency in order to transmit a response request signal or the like to a far place compared to the case where relay is performed using the response request frequency LF. In this embodiment, the description will be made assuming that the first relay frequency is UHF (more generally, RF, specifically 920 MHz).

(Career sense)
Next, carrier sense will be described. Standards for wireless equipment (for example, ARIB STD-T108, version 1.0, which is the standard for wireless equipment for 920 MHz band telemeters, telecontrols, and data transmissions, Part 2, Specified Low Power Radio, General Incorporated Corporation Radio The industry association) is obliged to perform carrier sense when performing radio wave transmission at 920 MHz. Specifically, it is obliged to provide a transmission time limiting device for performing carrier sense, and the operation of this transmission time limiting device is defined as follows. That is, “when the carrier sense time is 5 ms or more and the center frequency is 920.6 MHz to 922.2 MHz, the emission of the radio wave is stopped within 4 seconds after the radio wave is emitted, and the transmission is performed. No further transmissions are made after the pause time of 50 ms has elapsed, but the transmission pause time of 50 ms after the emission is stopped only within 4 seconds after the radio wave is first emitted. In this case, the retransmission should be performed after carrier sense of 128μs or more, and completed within 4 seconds after the first radio wave is emitted. (Item 3.4.1 of STD-T108).

  In the present embodiment, the relay transmission / reception circuit 14 in the transmission / reception circuit 11 of the in-vehicle relay device 10 and the relay transmission / reception circuit 24 in the transmission / reception circuit 22 of the portable relay device 20 each function as a transmission time limiter. In the following, when the first radio wave is emitted, the operation of performing carrier sense with carrier sense time = 5 ms is referred to as “long carrier sense”, and the radio wave is retransmitted within 4 seconds after the first radio wave is emitted. In this case, the operation of performing the carrier sense with the carrier sense time = 128 μs is referred to as “short carrier sense”. The inventor of the present application has found that there is a possibility that communication time can be shortened by performing short carrier sense instead of long carrier sense as carrier sense, and in the vehicle remote control processing described later, these long carrier sense and short carrier sense. By properly using the sense, the time condition is satisfied. Details of this point will be described later.

  As for the response time, “when responding to a request from another radio equipment (limited to those for which carrier sense is performed for the radio channel to be transmitted), and for the transmission satisfying the following conditions, carrier sense The transmission time per hour is not included in the total transmission time.1) When the number of simultaneously used channels is 1, the transmission starts within 2 ms after completing the reception of the request, and is 50 ms 2) Transmission that starts within 2ms after the completion of receiving the request and is completed within 5ms when the number of simultaneously used channels is 2, 3, 4, 5. (Item 3.4.3 of STD-T108).

(action mode)
Next, the operation mode will be described. An IC (RFIC: Radio Frequency Integrated Circuit) constituting the transmission / reception circuit 11 of the in-vehicle repeater 10 and the transmission / reception circuit 22 of the portable repeater 20 are 1) continuous mode (wire mode), The three operation modes of 2) buffer mode and 3) packet handling mode can be taken, and these three operation modes can be arbitrarily switched by setting operation parameters for the IC.

  Here, the continuous mode (wire mode) is an operation mode in which data to be transmitted / received is directly transferred between a data input and a data output pin without going through a FIFO (First In First Out). The buffer mode is an operation mode in which transmitted / received data is written or read via the FIFO. The packet handling mode is a mode in which a complete packet is constructed in the transmission mode and valid data is taken out from the packet in the reception mode, in addition to data being written or read via the FIFO as in the buffer mode. This packet can contain preamble, start pattern (synchronization pattern), optional address byte and byte length, and data, and additional options can perform CRC error detection, Manchester encoding, data scramble, etc. is there. The inventor of the present application has found that there is a possibility that the communication time can be shortened by performing the continuous mode as much as possible as the operation mode instead of the buffer mode or the packet handling mode. By using properly, the time condition is satisfied. Details of this point will be described later.

(processing)
Next, a vehicle remote operation process performed using the vehicle remote operation system 1 configured as described above will be described. 2 and 3 are flowcharts of the vehicle remote control process according to the present embodiment. In the following description of the processing, for processing that does not specify the control subject, the basic transmission / reception circuit 111 of the vehicle control device 110, the basic transmission / reception circuit 121 of the portable device 120, the transmission / reception circuit 11 or the output unit 12 of the in-vehicle repeater 10, or mobile It is assumed that it is executed by the transmission / reception circuit 22 of the repeater 20, and is stored in advance in the storage unit of each machine at a known timing and a known method when information acquisition source and acquisition route are not specified. Alternatively, it is assumed that a driver or the like is input through operation means (not shown) provided in each machine. Step is abbreviated as “S”.

(Processing-Startup sequence)
In FIG. 2, the operator who owns the portable device 120 and the portable relay device 20 instructs the start of the engine by pressing the operation switch 21 of the portable relay device 20 outside the vehicle. The portable relay machine 20 monitors the presence or absence of a driver's operation on the operation switch 21. When an operation on the operation switch 21 is received (SA1), a start sequence (not shown) is executed. Specifically, first, the first relay transmission circuit 27 of the portable repeater 20 performs carrier sense, and then transmits a start start request signal at the first relay frequency (eg, UHF = 920 MHz) ( SA2). The “start start request signal” is a signal for starting the start sequence by starting the vehicle control device 110 via the in-vehicle repeater 10.

  On the other hand, the first relay receiving circuit 17 of the in-vehicle repeater 10 receives the start start request signal (SA3). When the start start request signal is received by the first relay receiving circuit 17 of the in-vehicle repeater 10, the first relay transmission circuit 18 of the in-vehicle repeater 10 performs the carrier sense and then sends the start start response signal to the first start response signal. Transmit at one relay frequency (example: UHF = 920 MHz) (SA4). The “start start response signal” is a signal indicating that the vehicle control device 110 is started by receiving the start start request signal. This start start response signal is received by the first relay receiving circuit 28 of the portable repeater 20 (SA5).

  When the start start request signal is received by the first relay receiving circuit 17 of the in-vehicle repeater 10 in SA3, the output unit 12 of the in-vehicle repeater 10 outputs the start start condition output to the vehicle control device 110 by wired communication. Output (SA6). When this start start condition output is received by the vehicle control device 110 (SA7), the vehicle control device 110 determines that the start start output is a start start output performed when the driver performs a predetermined start operation in the vehicle. Since the output is the same with respect to the contents and communication method, the same processing as when the start start output when the predetermined start operation is performed is performed. That is, the response request signal transmission circuit 112 of the vehicle control device 110 transmits a predetermined activation response request signal to the portable device 120 at a response request frequency (for example, LF = 125 kHz) (SA8). Since the activation response request signal for the portable device 120 is performed at a response request frequency with a relatively short radio wave reach, the response request signal for the in-vehicle repeater 10 in the vehicle does not reach the portable device 120 outside the vehicle. Received by the receiving circuit 15 (SA10).

  On the other hand, the response request signal transmission circuit 25 of the portable device 120 starts carrier sense to prepare for transmission of the activation response request signal in SA12 after the start start condition output in SA6 is performed (SA9). When the activation response request signal is received by the response request signal reception circuit 15 in SA10, the first relay transmission circuit 18 detects the envelope of the activation response request signal (SA11), and only the detected envelope is FSK. Modulate and wirelessly transmit to the portable repeater 20 at the first relay frequency (eg, UHF = 920 MHz) (SA12). On the other hand, when receiving the envelope (SA13), the first relay receiving circuit 28 of the portable repeater 20 reproduces the activation response request signal based on the envelope (SA14). Details of the processing related to the envelope will be described later. Then, the response request signal transmission circuit 25 wirelessly transmits the reproduced activation response request signal to the portable device 120 at a response request frequency (for example, LF = 125 kHz) (SA15).

  When the activation response request signal is received by the response request signal receiving circuit 122 of the portable device 120 (SA16), the portable device 120 transmits the activation response request signal wirelessly transmitted from the portable repeater 20 in this way to the vehicle in SA8. Since it is the same signal as the activation response request signal wirelessly transmitted from the control device 110 and the content and communication method (including frequency, the same applies hereinafter), the activation response request signal transmitted from the vehicle control device 110 is directly received. The same processing as in the case is performed. That is, the portable device 120 generates a predetermined activation response signal, and the response signal transmission circuit 123 wirelessly transmits the activation response signal to the vehicle control device 110 at a response frequency (eg, UHF = 315 MHz) (SA17).

  When this activation response signal is received by the response signal receiving circuit 26 of the portable repeater 20 (SA19), the first relay transmission circuit 27 FSK-modulates the activation response signal (SA20), and the activation response signal is converted to the first relay frequency. (Example: UHF = 920 MHz) and wirelessly transmit to the in-vehicle repeater 10 (SA21). When this activation response signal is received by the first relay receiving circuit 17 of the in-vehicle repeater 10 (SA22), the first relay receiving circuit 17 demodulates the activation response signal to a response frequency (eg, UHF = 315 MHz) and responds. The signal is transmitted to the signal transmission circuit 16 (SA23), and the response signal transmission circuit 16 wirelessly transmits an activation response signal to the vehicle control device 110 at a response frequency (eg, UHF = 315 MHz) (SA24).

  When the activation response signal is received by the response signal receiving circuit 113 of the vehicle control device 110 (SA25), the vehicle control device 110 receives the activation response signal wirelessly transmitted from the in-vehicle repeater 10 in SA17 as a portable device. Since the activation response signal wirelessly transmitted from 120 is the same signal as the content and communication method, the same processing as when the activation response signal transmitted from the portable device 120 is directly received is performed. That is, the vehicle control device 110 determines whether or not a predetermined authentication sequence start condition is satisfied based on the activation response signal (not shown), and determines that even part of the authentication sequence start condition is not satisfied. In this case, the vehicle remote operation process is terminated without executing the authentication sequence. On the other hand, when it is determined that a predetermined authentication sequence start condition is satisfied, the authentication sequence shown in FIG. 3 is executed.

(Processing-Authentication sequence)
In the authentication sequence shown in FIG. 3, the response request signal transmission circuit 112 of the vehicle control device 110 transmits a predetermined authentication response request signal to the portable device 120 at a response request frequency (for example, LF = 125 kHz) (SA26). Since the authentication response request signal for the portable device 120 is performed at a response request frequency with a relatively short radio wave reach, the response request signal for the in-vehicle repeater 10 in the vehicle does not reach the portable device 120 outside the vehicle. Received by the receiving circuit 15 (SA28).

  On the other hand, the response request signal transmission circuit 25 of the portable device 120 starts carrier sense to prepare for the transmission of the authentication response request signal in SA30 after the activation response signal is transmitted in SA24 (SA27). Then, when the authentication response request signal is received by the response request signal receiving circuit 15 in SA28, the first relay transmission circuit 18 detects the envelope of this authentication response request signal (SA29), and only the detected envelope is FSK. Modulate and wirelessly transmit to the portable repeater 20 at the first relay frequency (eg, UHF = 920 MHz) (SA30). On the other hand, when receiving the envelope (SA31), the first relay receiving circuit 28 of the portable repeater 20 reproduces the authentication response request signal based on the envelope (SA32). Details of the processing related to the envelope will be described later. Then, the response request signal transmission circuit 25 wirelessly transmits the reproduced authentication response request signal to the portable device 120 at a response request frequency (for example, LF = 125 kHz) (SA33).

  When this authentication response request signal is received by the response request signal receiving circuit 122 of the portable device 120 (SA34), the portable device 120 transmits the authentication response request signal wirelessly transmitted from the portable repeater 20 in this way to the vehicle in SA26. Since the authentication response request signal wirelessly transmitted from the control device 110 is the same signal as the content and communication method, the same processing as when the authentication response request signal transmitted from the vehicle control device 110 is directly received is performed. That is, the portable device 120 generates a predetermined authentication response signal, and the response signal transmission circuit 123 wirelessly transmits the authentication response signal to the vehicle control device 110 at a response frequency (eg, UHF = 315 MHz) (SA35).

  When this authentication response signal is received by the response signal receiving circuit 26 of the portable repeater 20 (SA37), the first relay transmission circuit 27 FSK-modulates the authentication response signal (SA38), and this authentication response signal is transferred to the first relay. Wireless transmission is performed to the in-vehicle repeater 10 at a frequency (eg, UHF = 920 MHz) (SA39). When this authentication response signal is received by the first relay receiving circuit 17 of the in-vehicle repeater 10 (SA40), the first relay receiving circuit 17 demodulates the authentication response signal to a response frequency (eg, 315 MHz) and transmits a response signal. The signal is sent to the circuit 16 (SA41), and the response signal transmission circuit 16 wirelessly transmits an authentication response signal to the vehicle control device 110 at a response frequency (eg, UHF = 315 MHz) (SA42).

  When this authentication response signal is received by the response signal receiving circuit 113 of the vehicle control device 110 (SA43), the vehicle control device 110 receives the authentication response signal wirelessly transmitted from the in-vehicle relay device 10 in SA35 as a portable device. Since the authentication response signal wirelessly transmitted from 120 is the same signal as the content and communication method, the same processing as when the authentication response signal transmitted from the portable device 120 is directly received is performed. That is, the vehicle control device 110 determines whether or not a predetermined control condition is satisfied based on the authentication response signal (SA44). Specifically, the vehicle control device 110 determines whether or not the operation of the engine start switch of the vehicle and the operation of the brake are performed, but since the start start condition output has already been received in SA7, It is determined that the operation is performed. Further, for example, the vehicle control device 110 determines whether or not the authentication information included in the authentication response signal matches the authentication information stored in advance in its own storage unit. Furthermore, vehicle control apparatus 110 determines whether or not the elapsed time from the transmission of the activation response request signal at SA8 to the time is within the condition satisfaction time. If it is determined that all of these control conditions are satisfied, the vehicle control device 110 performs predetermined control for starting the engine (SA45). For example, the vehicle control device 110 encrypts and transmits a signal indicating that the control conditions for starting the engine are satisfied to the ECU, and the ECU that receives and decrypts this signal starts the starter motor of the engine. To start the engine. This completes the vehicle remote operation process. Note that if the vehicle control device 110 determines that even a part of the control conditions are not satisfied, the vehicle remote operation processing is terminated without performing any control.

(Details of processing-carrier sense)
Next, the process described above will be described in more detail. First, the details of carrier sense will be described. The carrier sense in SA2 in FIG. 2 can be performed by a known method. For example, the first relay transmission circuit 27 of the portable repeater 20 confirms that there is no other radio wave transmitted at the first relay frequency. After that (after performing carrier sense), a start start request signal is transmitted. The carrier sense in SA2 is performed by long carrier sense (carrier sense time = 5 ms) since it is carrier sense when the mobile relay device 20 first emits radio waves. Similarly, the carrier sense in SA4 is also carried out with long carrier sense (carrier sense time = 5 ms) since it is the carrier sense when the in-vehicle repeater 10 first emits radio waves.

  On the other hand, the carrier sense in SA21 in FIG. 2 and SA39 in FIG. 3 in the portable repeater 20 can be performed within 4 seconds after the long carrier sense is performed in SA2 in FIG. It is preferable to carry out through a short carrier sense (carrier sense time = 128 μs) without providing a transmission pause time. Similarly, the carrier sense in SA9 in FIG. 2 and SA27 in FIG. 3 in the in-vehicle repeater 10 can be performed within 4 seconds after the long carrier sense is performed in SA4 in FIG. It is preferable to perform short carrier sense (carrier sense time = 128 μs) without providing a 50 ms transmission pause time. As described above, since the short carrier sense is performed in SA21 and SA39, and SA9 and SA27, the activation response request signal can be transmitted more quickly than in the case of performing the long carrier sense. The possibility of satisfying can be improved.

  Further, the short carrier sense for transmitting the activation response request signal in SA12 in FIG. 2 is performed after starting the reception of the activation response request signal in SA10 or after the reception of the activation response request signal is completed. In this embodiment, the process is started after the start start condition is output in SA6 without waiting for the start of the reception of the start response request signal in SA10 (SA9). By performing such processing, it is possible to reduce the time required for short carrier sense and satisfy the time condition compared to the case where short carrier sense is started after waiting for the start or end of reception of the activation response request signal. Can be improved. However, if short carrier sense is started early in this way, there is a possibility that signal transmission will be performed before the activation response request signal is received, which may cause noise. Furthermore, processing for noise reduction is performed. Details of this processing will be described later.

  Similarly, the short carrier sense for transmitting the authentication response request signal in SA30 of FIG. 3 is performed after the start of the start response request signal in SA28 or after the start of the start response request signal reception. However, in the present embodiment, the process starts after transmission of the activation response signal of SA24 without waiting for the start of reception of the activation response request signal in SA28 (SA27). By performing such processing, it is possible to reduce the time required for short carrier sense and satisfy the time condition compared to when short carrier sense is started after waiting for the start or end of reception of an authentication response request signal. Can be improved. However, if the short carrier sense is started early in this way, there is a possibility that the signal will be transmitted before the authentication response request signal is received, which may cause noise. Furthermore, processing for noise reduction is performed. Details of this processing will be described later.

  Furthermore, it is preferable that the short carrier sense in SA21 in FIG. 2 is started without waiting for the reception of the activation response signal in SA19 to be completed. Specifically, after transmitting the activation response request signal in SA15, the response signal receiving circuit 26 of the portable repeater 20 receives the RSSI (reception strength) of the activation response signal (eg, UHF = 315 MHz) transmitted from the portable device 120. : Received Signal Strength Indicator) is started (SA18). That is, the response signal receiving circuit 26 constitutes a transmission state monitoring unit that monitors the transmission state of the response signal from the portable device 120. When the RSSI is equal to or greater than a predetermined strength, it is determined that transmission of the activation response request signal from the response signal transmitting circuit 123 to the response signal receiving circuit 26 is started, and it is determined that the start has been started. In this case, short carrier sense (carrier sense time = 128 μs) is started without waiting for completion of reception of all activation response request signals. By performing such processing, the time required for short carrier sensing is shortened and the possibility of satisfying the time condition is improved compared to the case where short carrier sensing is started after all activation response request signals have been received. Can be made.

  Similarly, the short carrier sense in SA39 of FIG. 3 is started without waiting for the reception of the authentication response signal in SA37 to be completed. Specifically, after transmitting the authentication response request signal in SA33, the response signal receiving circuit 26 of the portable repeater 20 monitors the RSSI of the authentication response signal (eg, UHF = 315 MHz) transmitted from the portable device 120. Start (SA36). When the RSSI is equal to or greater than the predetermined strength, it is determined that the transmission of the authentication response request signal from the response signal transmitting circuit 123 to the response signal receiving circuit 26 is started, and the start is determined. In this case, short carrier sense (carrier sense time = 128 μs) is started without waiting for completion of reception of all the authentication response request signals. By performing such processing, the time required for short carrier sense is shortened and the possibility of satisfying the time condition is improved as compared with the case where short carrier sense is started after all authentication response signals have been received. be able to.

(Details of processing-mode)
Next, details of the mode will be described. Since the time required for transmission / reception of various signals in SA2 to SA5 in FIG. 2 is not included in the condition satisfaction time, it is preferable to prioritize communication reliability over speed of transmission / reception. Therefore, transmission / reception in SA2 to SA5 is performed in a packet mode with an error correction function. Specifically, in SA2, the first relay transmission circuit 27 transmits a start start request signal in a packet mode with an error correction function. On the other hand, in SA3, the first relay receiving circuit 17 receives the start start request signal in the packet mode with an error correction function, and when there is an error in the start start request signal, the first relay is performed by a known method. By asking the transmission circuit 27 to resend the start start request signal or performing error correction, the reliability of communication is ensured.

  On the other hand, since the time required for transmission / reception of various signals between SA10 in FIG. 2 and SA42 in FIG. 3 is included in the condition satisfaction time, priority is given to speed over reliability of transmission / reception. It is preferable to carry out in the mode. Specifically, in SA12, the first relay transmission circuit 18 transmits the envelope in the continuous mode. On the other hand, in SA13, the first relay receiving circuit 28 receives the envelope in the continuous mode. Thereafter, similarly, transmission of an activation response signal at SA21, reception of an activation response signal at SA22, transmission of an authentication response request signal at SA30, reception of an authentication response request signal at SA31, transmission of an authentication response signal at SA39, and authentication at SA40 Any response signal is received in the continuous mode. For this reason, the time for buffering data in the FIFO can be omitted, and it becomes possible to transmit and receive signals more quickly than when performing transmission and reception in the packet mode, thereby improving the possibility of satisfying the time condition. it can.

(Processing-Details of processing related to envelope)
Next, details of processing related to the envelope will be described. In order to quickly transmit and receive the activation response request signal in SA12 and SA13 in FIG. 2, the first relay transmission circuit 18 modulates and transmits the entire activation response request signal, and thereafter, the first relay transmission circuit 20 performs the first response. The relay reception circuit 28 may receive and demodulate the entire activation response request signal. However, the activation response request signal is transmitted and received at a response request frequency (for example, LF = 125 kHz) which is a relatively low frequency. Therefore, when the first relay receiving circuit 28 is designed so that the entire frequency band including the baseband (eg, 200 kHz or more) can be received for such a low frequency, the reception of the first relay receiving circuit 28 is performed. Since it becomes difficult to improve the sensitivity and it is difficult to increase the communication distance, it is difficult to improve the quality of communication. Therefore, in the present embodiment, transmission / reception of a signal using an envelope (waveform information specifying the amplitude and period of the signal) is performed.

  FIG. 4 is a conceptual diagram for explaining signal transmission / reception using an envelope. As shown on the left side of FIG. 4, in SA11 of FIG. 2, the first relay transmission circuit 18 of the in-vehicle repeater 10 detects the envelope of the activation response request signal (original LF signal) received from the vehicle control device 10. To do. This envelope detection can be performed by a known method. For example, a monostable multivibrator of a retriable type (a type in which an output is always kept active when an input pulse interval continues within a predetermined time) is used. . Specifically, an activation response request signal is input to the monostable multivibrator, and when the activation response request signal is turned ON, the output of the monostable multivibrator is switched to a high level. The output of the monostable multivibrator is held at a high level until is turned off, and the output of the monostable multivibrator is switched to a low level when the activation response request signal is turned off. Similarly, the envelope of the activation response request signal is detected by switching the output of the monostable multivibrator between the high level and the low level in accordance with ON and OFF of the activation response request signal. Then, in SA12, the first relay transmission circuit 18 performs FSK modulation only on the detected envelope and wirelessly transmits it to the portable repeater 20 at the first relay frequency (eg, 920 MHz). On the other hand, when receiving the envelope at SA13, the first relay receiving circuit 28 of the portable repeater 20 demodulates the received envelope at SA14, as shown on the right side of FIG. The activation response request signal is reproduced by taking an OR with the signal. At this time, as the LF carrier signal, a signal having a response request frequency (for example, LF = 125 kHz) specified in advance can be used.

  Similarly, transmission / reception of authentication response request signals in SA30 and SA31 in FIG. 3 is also performed using an envelope. In other words, the first relay transmission circuit 18 detects the envelope of the authentication response request signal in SA29, and in SA30, FSK-modulates only the detected envelope and performs the mobile relay 20 using the first relay frequency (eg, 920 MHz). Wirelessly transmit to. On the other hand, when the first relay receiving circuit 28 of the portable repeater 20 receives the envelope at SA31, after demodulating the received envelope at SA32, the OR of the demodulated envelope and the LF carrier signal is obtained. Reproduce the authentication response request signal.

When transmission / reception using such an envelope is performed, only the envelope needs to be modulated and demodulated. Therefore, the first relay receiving circuit 28 is compared with the case where the activation response request signal is modulated and demodulated as it is. , The reception sensitivity of the first relay receiving circuit 28 can be easily improved, the communication distance can be easily increased, and the communication quality can be easily improved. .

(Processing-details of processing for noise reduction)
Next, details of processing for noise reduction will be described. As described above, if the activation response signal is transmitted and received in SA21 and SA22 in FIG. 2 in the continuous mode, a new problem may occur. That is, since the short carrier sense for transmitting the activation response request signal in SA12 of FIG. 2 is started in SA9 without waiting for the start or end of reception of the activation response request signal in SA10, the activation response request signal There is a possibility that a noise signal will be transmitted before the reception of. When the noise signal is transmitted in this way, the continuous mode is adopted, and therefore, this noise signal may be received as it is by the mobile repeater 20, which is not preferable. Therefore, in the present embodiment, the first relay transmission circuit 18 of the in-vehicle relay device 10 does not immediately transmit a signal after the short carrier sense is completed, but transmits an activation response request signal from the vehicle control device 110. Therefore, the transmission of the noise signal is prevented by masking the transmission signal only for a certain period of time (hereinafter referred to as a mask time). For example, after the start start condition is output at SA6, the time when the start response request signal is received at SA10 is set as the mask time. The first relay transmission circuit 18 masks the transmission signal until the mask time elapses after the start start condition is output in SA6.

  Similarly, since the short carrier sense for transmitting the authentication response request signal in SA30 in FIG. 3 is started in SA27 without waiting for the start or end of reception of the activation response request signal in SA28, the noise signal May be sent. Therefore, in the present embodiment, the first relay transmission circuit 18 of the in-vehicle repeater 10 does not immediately transmit a signal after completing the short carrier sense, but transmits an authentication response request signal from the vehicle control device 110. The transmission of the noise signal is prevented by masking the transmission signal for the mask time that is assumed to be. For example, the time that is assumed to receive the authentication response request signal in SA28 after the activation response signal is transmitted in SA24 is set as the mask time. Then, the first relay transmission circuit 18 masks the transmission signal until the mask time elapses after transmitting the activation response signal in SA24.

  In addition, other problems can arise with the continuous mode. That is, when the transmission of the activation response signal by the response signal transmission circuit 123 in SA17 is completed, the reception of the activation response signal by the response signal reception circuit 26 in SA19 is completed accordingly, and the activation by the first relay transmission circuit 27 in SA21 The transmission of the response signal ends. However, in practice, the reception level of the activation response signal by the response signal reception circuit 26 in SA19 may not be completely zero due to the influence of noise or the like, so the activation response signal by the first relay transmission circuit 27 in SA21. May inadvertently continue transmission of noise signals. And when such a noise signal is output to the vehicle control apparatus 110 via the vehicle-mounted repeater 10, there is a possibility that the vehicle control apparatus 110 determines that an error has occurred and cancels the start control. is there.

  Therefore, in the present embodiment, in order to prevent such a problem, the mobile repeater 20 detects that the transmission of the activation response signal by the response signal transmission circuit 123 in SA17 is completed, and at the time of the detection. By blocking signal transmission from the portable repeater 20 to the in-vehicle repeater 10, the noise signal is prevented from being transmitted. Specifically, the response signal receiving circuit 26 starts monitoring the RSSI of the activation response signal transmitted from the portable device 120 in SA18, and continues monitoring this RSSI even after starting the reception of the activation response signal in SA19. If the RSSI is less than the predetermined strength, it is determined that the transmission of the activation response signal from the portable device 120 has been completed. When it is determined that the transmission of the activation response signal is completed in this way, the transmission / reception state of the signal at the first relay frequency (eg, 920 MHz) to the in-vehicle relay device 10 in the portable relay device 20 is changed from the transmission state to the reception state. Switch to. For example, when the response request signal transmission circuit 25 and the response signal transmission circuit 26 are connected to the relay transmission / reception circuit 24 via a common changeover switch, various signals from the mobile relay 20 to the in-vehicle relay 10 In order to perform transmission, the mobile relay 20 is switched to the transmission state by connecting the response signal receiving circuit 26 to the relay transmitting / receiving circuit 24 by driving this switch, In order to receive the signal at the portable repeater 20, it is assumed that the portable repeater 20 is switched to the reception state by connecting the response request signal transmission circuit 25 to the relay transmission / reception circuit 24 by driving this switch. To do. In this case, when the first relay transmission circuit 27 of the relay transmission / reception circuit 24 wirelessly transmits the activation response signal in SA 21, the portable repeater 20 is connected by connecting the response signal reception circuit 26 to the relay transmission / reception circuit 24. When the RSSI of the activation response signal becomes less than the predetermined strength because it is in the transmission state, the response request signal transmission circuit 25 is connected to the relay transmission / reception circuit 24 by driving this switch. The signal transmission / reception state at the first relay frequency (for example, 920 MHz) to the in-vehicle relay device 10 in the portable relay device 20 is switched from the transmission state to the reception state. By performing such switching, signal transmission from the mobile relay device 20 to the in-vehicle relay device 10 can be blocked, and thus it is possible to prevent a noise signal from being transmitted.

  Similarly, after transmitting the authentication response request signal in SA33 of FIG. 3, the response signal receiving circuit 26 of the portable repeater 20 starts monitoring RSSI of the authentication response signal transmitted from the portable device 120 in SA36. Even after the reception of the authentication response signal is started in SA37, the RSSI monitoring is continued. Then, when the RSSI becomes less than the predetermined strength, the response signal receiving circuit 26 determines that the transmission of the authentication response signal from the portable device 120 has been completed, and the in-vehicle state in the portable repeater 20 is similar to the above. By switching the signal transmission / reception state at the first relay frequency (for example, 920 MHz) to the relay device 10 from the transmission state to the reception state, the signal transmission from the mobile relay device 20 to the in-vehicle relay device 10 is blocked, and noise Prevent signals from being transmitted.

  However, such noise signal transmission prevention can be performed by a method other than the method of switching the portable repeater 20 from the transmission state to the reception state. For example, even when a method using carrier squelch is adopted. Good. That is, in SA21, when it is determined that the transmission of the activation response signal from the portable device 120 is completed due to the RSSI being less than the predetermined strength, the response signal receiving circuit 26 performs a carrier squelch (shown in FIG. It is also possible to prevent the noise signal from being transmitted in SA21 by turning ON (omitted) and setting the reception level of the activation response signal to zero or a value close thereto. In this case, the carrier squelch is performed when the wireless transmission of the response signal to the in-vehicle repeater 10 is completed based on the transmission state of the response signal monitored by the response signal receiving circuit 26 that is a transmission state monitoring unit. Constitutes received data blocking means for blocking data reception from the portable device 120 after the termination. Although a specific driving method of such carrier squelch is arbitrary, for example, the response signal receiving circuit 26 generates an RSSI output (DC voltage output) and a predetermined threshold voltage (for example, 2.5 V) by itself. When the RSSI output is equal to or higher than the threshold voltage, the carrier squelch is turned OFF by the output from the comparator, and when the RSSI output becomes less than the threshold voltage, this By turning on the carrier squelch by the output from the comparator, the carrier squelch is automatically switched.

  Similarly, in SA39, when it is determined that the transmission of the authentication response signal from the portable device 120 is completed because the RSSI is less than the predetermined strength, the response signal receiving circuit 26 determines that the carrier squelch included in the response signal receiving circuit 26 is provided. By turning ON (not shown) and setting the reception level of the authentication response signal to zero or a value close thereto, it is possible to prevent the noise signal from being transmitted in SA39.

  Further, such transmission of noise signals may be prevented by masking the transmission signals described above. For example, the time when the activation response request signal is transmitted at SA15 and then the activation response signal is received at SA19 is set as the mask time. Then, the first relay transmission circuit 27 masks the transmission signal until the mask time elapses after transmitting the activation response request signal in SA15. Or similarly, after transmitting an authentication response request signal in SA33, time assumed to receive an authentication response signal in SA37 is set as a mask time. The first relay transmission circuit 27 masks the transmission signal until the mask time elapses after transmitting the authentication response request signal in SA33. In this case, the first relay transmission circuit 27 constitutes mask time monitoring means for monitoring whether or not the mask time has actually elapsed since the response request signal was transmitted to the portable device 120, and the mask time A transmission blocking means (transmission mask means) for masking signal transmission to the in-vehicle repeater 10 is determined until it is determined that elapses.

(Processing-Details of processing related to circuit switching of in-vehicle repeater 10)
Next, the detail of the process regarding the circuit switching of the vehicle-mounted relay machine 10 is demonstrated. In order to improve the possibility of satisfying the time condition, the time loss associated with the switching of the signal transmission / reception state at the first relay frequency (for example, 920 MHz) to the mobile relay device 20 in the in-vehicle relay device 10 is reduced as much as possible. It is preferable. For example, when the response request signal transmission circuit 15 and the response signal transmission circuit 16 are connected to the relay transmission / reception circuit 14 via a common changeover switch, the activation from the in-vehicle relay 10 to the portable relay 20 is performed in SA12. In order to transmit the response request signal, by driving this switch, the response request signal transmission circuit 15 is connected to the relay transmission / reception circuit 14 to switch the in-vehicle repeater 10 to the transmission state. In order to receive the activation response signal from the machine 20 in the in-vehicle repeater 10, the in-vehicle repeater 10 is received by connecting the response signal transmission circuit 16 to the relay transmission / reception circuit 24 by driving this switch. Assume that you want to switch to. This switching may be performed by, for example, analyzing the activation response request signal and detecting the final bit of completion of reception of the activation response request signal in SA10, but this analysis requires time. Is not preferable.

  Therefore, it is preferable to determine that all the activation response request signals have been received in SA10 based on the transmission time of the activation response request signal. For example, the activation response request signal (LF signal) transmitted from the response request signal transmission circuit 112 of the vehicle control device 110 is a signal configured by alternately repeating two different amplitudes, and the transmission time of one amplitude (Hereinafter referred to as mark time) and a signal (hereinafter referred to as an encoded signal) encoded in such a manner that at least the space time is known to be constant among the transmission time of the other amplitude (hereinafter referred to as space time). ) Is assumed. In this case, every time the in-vehicle repeater 10 receives the other amplitude in SA10, the in-vehicle repeater 10 measures the time during which the other amplitude continues with a known timer (not shown). If the time exceeds the space time, it can be determined that the transmission of the activation response request signal has been completed (if the transmission has not ended, the time during which the other amplitude continues is the space time. Since one of the amplitudes is supposed to be received at the time of), it is determined that all the activation response request signals have been received (the transmission of the activation response request signal from the response request signal transmission circuit 112 has been completed). To do. And when it determines in this way, the transmission / reception state of the signal in the 1st relay frequency (example: 920 MHz) to the portable relay machine 20 in the vehicle-mounted relay machine 10 is performed, without analyzing an activation response request signal etc. By switching from the transmission state to the reception state, the activation response signal in SA22 can be received. By performing such processing, it is possible to avoid occurrence of a time loss due to switching of the transmission / reception state compared to the case of starting the transmission / reception state switching after analyzing the activation response request signal, etc. The possibility of satisfying can be improved. Alternatively, when it is known in advance that the mark time is constant rather than the space time, it may be determined whether or not the activation response request signal has been completely received based on the mark time. Alternatively, if it is known in advance that the transmission time of the entire activation response request signal (LF signal) is constant, it is determined whether or not all the activation response request signals have been received based on the transmission time. May be. That is, based on the transmission time, mark time, or space time of the activation response request signal (LF signal), it can be determined whether or not the activation response request signal has been completely received.

  Similarly, in order to transmit an authentication response request signal from the in-vehicle repeater 10 to the portable repeater 20 in SA30, the response request signal transmission circuit 15 is connected to the relay transmission / reception circuit 14 by driving this switch. Thus, in order to switch the in-vehicle repeater 10 to the transmission state and receive the authentication response signal from the portable repeater 20 in the SA 40 in the in-vehicle repeater 10, the switch is driven to the relay transmission / reception circuit 24. The case where the vehicle-mounted relay machine 10 is switched to a reception state by connecting the response signal transmission circuit 16 is assumed. This switching may be performed by, for example, analyzing the authentication response request signal and detecting the last bit of completion of reception of the authentication response request signal in SA28, but this analysis requires time. Is not preferable.

  Therefore, in the present embodiment, it is determined based on the transmission time of the authentication response request signal that all the authentication response request signals have been received in SA28. For example, it is assumed that the authentication response request signal transmitted from the response request signal transmission circuit 112 of the vehicle control device 110 is an encoded signal. In this case, the in-vehicle repeater 10 transmits the authentication response request signal when the transmission time, mark time, or space time of the authentication response request signal (LF signal) exceeds a certain time in SA28. Since it can be determined that it has been completed, it is determined that all the authentication response request signals have been received (transmission of the authentication response request signal from the response request signal transmission circuit 112 has been completed). And when it determines in this way, without performing analysis etc. of an authentication response request signal, the transmission / reception state of the signal in the 1st relay frequency (example: 920 MHz) to the portable relay machine 20 in the vehicle-mounted relay machine 10 is shown. By switching from the transmission state to the reception state, the authentication response signal in SA40 can be received. By performing such processing, it is possible to avoid the occurrence of time loss due to switching of the transmission / reception state compared to the case of starting the transmission / reception state switching after analyzing the authentication response request signal, etc. The possibility of satisfying can be improved.

(Processing-Details of processing related to circuit switching of portable repeater 20)
Next, details of processing related to circuit switching of the portable repeater 20 will be described. As in the case of the in-vehicle repeater 10, in order to improve the possibility of satisfying the time condition, the signal transmission / reception state at the first relay frequency (eg, 920 MHz) to the in-vehicle repeater 10 in the portable repeater 20 It is preferable to reduce as much time loss as possible. For example, when the response request signal transmission circuit 25 and the response signal transmission circuit 26 are connected to the relay transmission / reception circuit 24 via a common switch, the activation response request signal from the in-vehicle relay device 10 is transmitted in SA13. In order to receive in the portable repeater 20, the portable repeater 20 is switched to the reception state by connecting the response request signal transmission circuit 25 to the relay transmission / reception circuit 24 by driving this switch. In order to transmit the activation response signal from the machine 20 to the in-vehicle repeater 10, the portable repeater 20 is set in the transmission state by connecting the response signal receiving circuit 26 to the relay transmitting / receiving circuit 24 by driving this switch. Assume a case of switching. This switching may be performed by, for example, analyzing the activation response signal and detecting the final bit after completing the reception of the activation response signal in SA19, but this analysis may take time. It is not preferable.

  Therefore, in the present embodiment, this switching is performed based on the RSSI monitoring result of the activation response signal in SA18. Specifically, in the mobile repeater 20, when the RSSI of the activation response signal becomes equal to or higher than a predetermined strength, transmission of the activation response signal from the response signal transmission circuit 123 to the response signal reception circuit 26 is started. If it is determined that it has been started, a circuit connected to the relay transmission / reception circuit 24 is connected from the response request signal transmission circuit 25 without waiting for the completion of reception of the activation response signal. Switching to the response signal receiving circuit 26 switches the signal transmission / reception state at the first relay frequency (for example, 920 MHz) to the in-vehicle relay device 10 in the portable relay device 20 from the reception state to the transmission state, and starts in SA21 Enables transmission of response signals. Then, the activation response signal received at SA19 is sequentially transmitted at SA21 in the continuous mode. By performing such processing, it is possible to avoid the occurrence of time loss by the reception time of the start response signal, compared to the case where switching of the circuit is started after receiving all the start response signals. The possibility of satisfying can be improved.

  Similarly, it is necessary to switch the signal transmission / reception state at the first relay frequency (for example, 920 MHz) to the in-vehicle repeater 10 in the portable repeater 20 from the reception state to the transmission state even in SA31 to SA39 in FIG. In this embodiment, this switching is performed based on the RSSI monitoring result of the activation response signal in SA36 of FIG. Specifically, in the portable repeater 20, when the RSSI of the activation response signal is equal to or higher than a predetermined strength, transmission of the authentication response signal from the response signal transmission circuit 123 to the response signal reception circuit 26 is started. If it is determined that it has been started, a circuit connected to the relay transmission / reception circuit 24 is connected from the response request signal transmission circuit 25 without waiting for completion of reception of all the authentication response signals. By switching to the response signal reception circuit 26, the signal transmission / reception state at the first relay frequency (for example, 920 MHz) to the in-vehicle relay device 10 in the portable relay device 20 is switched from the reception state to the transmission state, and authentication in SA39 is performed. Enables transmission of response signals. Then, the authentication response signals received at SA37 are sequentially transmitted at SA39 in the continuous mode. By performing such processing, it is possible to avoid the occurrence of a time loss by the reception time of the authentication response signal compared to the case where switching of the circuit is started after the reception of all the authentication response signals, and the time condition is set. The possibility of satisfying can be improved.

[Modifications to Embodiment]
Although the embodiments of the present invention have been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of each invention described in the claims. Can do. Hereinafter, such a modification will be described.

(About problems to be solved and effects of the invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves the problems not described above or has the effects not described above. There are also cases where only some of the described problems are solved or only some of the described effects are achieved. For example, even when the certainty of vehicle control by the vehicle remote operation system according to the present invention is comparable to that of a conventional vehicle remote operation system, the vehicle remote operation system different from the conventional one can achieve the same degree as the conventional one. When the certainty of the vehicle control can be obtained, the problem of the present invention is solved.

(About distribution and integration)
Further, each of the electrical components described above is functionally conceptual and does not necessarily need to be physically configured as illustrated. That is, the specific form of distribution and integration of each unit is not limited to the one shown in the figure, and all or a part thereof may be functionally or physically distributed in arbitrary units according to various loads or usage conditions. Can be integrated and configured. For example, the basic transmission / reception circuit 13 and the relay transmission / reception circuit 14 in the in-vehicle repeater 10 are physically configured by one circuit, or the basic transmission / reception circuit 23 and the relay transmission / reception circuit 24 in the portable relay 20 are physically configured. You may comprise by one circuit. Or, conversely, the basic transmission / reception circuit 13 and the relay transmission / reception circuit 14 in the in-vehicle relay 10 are each physically configured by a plurality of circuits, or the basic transmission / reception circuit 23 and the relay transmission / reception circuit 24 in the portable relay 20 are physically configured. May be composed of a plurality of circuits. Alternatively, when the response request signal transmitted from the vehicle control device 110 is received by the response request signal receiving circuit 15 of the in-vehicle repeater 10, the first relay transmission circuit 18 detects the envelope of the response request signal and performs FSK modulation. As described above, the response request signal receiving circuit 15 may detect the envelope and perform FSK modulation, or may perform modulation using a separately provided modulation circuit. In addition to such modulation, various types of detection, various types of demodulation, and various types of determination may be performed by other circuits.

(Vehicle)
The type and configuration of the vehicle is arbitrary, and includes a crane vehicle and a two-wheeled vehicle in addition to a four-wheeled vehicle. Further, when the device to be controlled is other than the prime mover, a vehicle without a prime mover may be targeted, for example, a two-wheeled bicycle may be targeted.

(About the configuration of the vehicle control system)
The configuration of the vehicle control system 100 is arbitrary. For example, in the above-described embodiment, the vehicle control device 110 is described as being connected to the ECU by wire, but the vehicle control device 110 itself may be the ECU. Further, the function described as being performed by the vehicle control device 110 may be provided to the ECU, or the function described as being performed by the ECU may be provided to the vehicle control device 110. For example, part of the determination of satisfaction of the control condition may be performed by an ECU connected to the vehicle control device 110 instead of the vehicle control device 110. Further, the vehicle control device 110 can have a known function in addition to the functions described above. For example, when the response signal cannot be received within a predetermined time after the response request signal is transmitted, A retry function for retransmitting the request signal may be provided. Even in the case of retrying in this way, after establishing the connection as described above, maintaining this connection until the vehicle remote control processing ends, resulting in retransmission of a response request signal for retrying, etc. To minimize delay. Furthermore, the present invention can be similarly applied to the case where only one of the “start-up sequence” and the “authentication sequence” is performed, or even when another sequence is performed. In this case, the vehicle remote control system In FIG. 6, only one of the “startup sequence” and the “authentication sequence” can be performed, and communication for performing another sequence can be relayed.

(About the configuration of the vehicle remote control system)
In the above-described embodiment, the example in which the vehicle remote operation system 1 is configured by the in-vehicle relay device 10 and the mobile relay device 20 has been described. However, the vehicle remote operation system 1 may be configured including other devices, for example, When remote control is performed from a place extremely far from the vehicle, a repeater that relays wireless communication between the in-vehicle repeater 10 and the portable repeater 20 may be further installed. In addition, a plurality of portable repeaters 20 may be communicable with one in-vehicle repeater 10. Moreover, you may make it connect the vehicle-mounted relay machine 10 to apparatuses other than the vehicle control apparatus 110 by radio | wireless or a wire as needed. In the embodiment, the arrangement of the vehicle remote control system 1 has been described as being operated with the portable repeater 20 placed outside the vehicle together with the portable device 10, but the portable repeater 20 is placed inside the vehicle together with the portable device 10. You may arrange.

(About connection mode)
In the said embodiment, communication between the vehicle control apparatus 110 and the vehicle-mounted relay machine 10 (except the output from the output part 12), and communication between the portable device 120 and the portable relay machine 20 are wireless. Although described as being performed by communication, any part of communication may be performed by wire.

(About frequency)
The frequencies indicated by numerical values in the above description are merely examples, and other frequencies may be adopted. Further, the relay frequency used for the activation sequence and the relay frequency used for the authentication sequence may be different from each other.

(About processing)
The order and timing of the processing described above can be changed as appropriate. For example, in the above-described embodiment, the case where the vehicle control device 110 transmits the activation response request signal using the operation signal from the mobile relay device 20 as a trigger has been described. However, the vehicle control device 110 regardless of the presence or absence of the operation signal. Is configured to transmit activation response request signals at predetermined intervals, processing related to relay of activation response request signals may be performed prior to processing related to transmission of operation signals.

(About career sense)
The necessity of carrier sense, time, etc. can be changed according to the revised content when the standard is revised. If there is no problem with the satisfaction of time conditions, long carrier sensing may be performed instead of all or part of the short carrier sensing described above, or long carrier sensing or short carrier sensing may be performed. The start timing and the start reference may be arbitrarily changed.

(About modes)
If there is no problem with the satisfaction of the time condition, the packet mode may be performed instead of all or part of the continuous mode described above.

(About the envelope)
When the first relay reception circuit 28 is designed so that the entire frequency band including the baseband can be received due to progress of circuit design technology, etc., the reception sensitivity of the first relay reception circuit 28 is improved and communication is improved. When the difficulty of increasing the distance decreases, general modulation processing and demodulation processing may be applied instead of the detection and signal reproduction processing using the envelope described above. It is possible to further improve the satisfaction of the time condition.

(About processing for noise reduction)
When the influence of noise can be ignored or when the packet mode is performed instead of the continuous mode, the processing for noise reduction may be omitted. Further, even when processing for noise reduction is performed, instead of processing using carrier squelch, for example, a power source of an amplifier (not shown) provided in the in-vehicle repeater 10 or the portable repeater 20 Generation of noise may be prevented by blocking the signal. Even when processing using carrier squelch is performed, a carrier squelch is provided in the first relay transmission circuit 27 instead of the response signal receiving circuit 26, or a carrier squelch is provided in the in-vehicle repeater 10. Also good. In addition to completely blocking wireless transmission of the response signal to the in-vehicle repeater 10, the level of the response signal may be reduced to a predetermined level where noise is allowed.

(Regarding processing related to switching of send / receive status)
If there is no problem with the satisfaction of the time condition, the above-described processing related to switching of the transmission / reception state may be omitted.

(Appendix)
In order to solve the above-described problems and achieve the object, the vehicle remote control system according to appendix 1 is a vehicle control system configured such that a vehicle control device and a portable device can wirelessly communicate with each other. Based on a response request signal wirelessly transmitted from the control device, the portable device wirelessly transmits a response signal, and the vehicle control device controls a predetermined device of the vehicle on the condition that the response signal is received. A vehicle remote control system for remotely operating the predetermined device via a vehicle control system, comprising: an in-vehicle relay device capable of communicating with the vehicle control device; and a portable relay device capable of communicating with the portable device, The in-vehicle relay device receives the response request signal transmitted from the vehicle control device and wirelessly transmits the response request signal to the portable relay device, and the wirelessly transmitted response from the portable relay device. Receiving and transmitting to the vehicle control device, the portable relay device receives the response request signal wirelessly transmitted from the in-vehicle relay device and transmits the response request signal to the portable device. A transmission / reception means for receiving the response signal transmitted from the machine based on the response request signal and wirelessly transmitting the response signal to the in-vehicle relay machine, wherein the transmission / reception means of the in-vehicle relay machine is transmitted from the vehicle control device Without waiting for the completion of reception of the response request signal, switching from the wireless reception state from the vehicle control device to the wireless transmission state to the portable relay, or the transmission / reception means of the portable relay, Switching from the wireless reception state from the portable device to the wireless transmission state to the in-vehicle relay device is performed without waiting for completion of reception of the response signal transmitted from the portable device.

  The vehicle remote control system according to appendix 2 is the vehicle remote control system according to appendix 1, wherein the transmission / reception means of the in-vehicle repeater transmits a transmission time and a mark time of the response request signal transmitted from the vehicle control device Alternatively, based on the space time, the wireless reception state from the vehicle control device is switched to the wireless transmission state to the portable relay device.

  The vehicle remote control system according to appendix 3 is the vehicle remote control system according to appendix 1 or 2, wherein the transmission / reception means of the portable repeater detects a reception intensity of the response signal transmitted from the portable device. When the detected reception intensity becomes equal to or higher than a predetermined intensity, the wireless reception state from the portable device is switched to the wireless transmission state to the in-vehicle relay device.

  The vehicle remote control system according to appendix 4 is the vehicle remote control system according to any one of appendices 1 to 3, wherein the transmission / reception means of the in-vehicle relay unit transmits the response request transmitted from the vehicle control device. Starts carrier sense for wireless transmission of the response request signal to the portable repeater without waiting for completion of signal reception, or the transmission / reception means of the portable repeater transmits from the portable device The carrier sense for wirelessly transmitting the response signal to the vehicle control device is started without waiting for the completion of reception of the response signal.

  The in-vehicle relay device of the vehicle remote control system according to attachment 5 is a vehicle control system configured such that the vehicle control device and the portable device can wirelessly communicate with each other, and the response request signal wirelessly transmitted from the vehicle control device The predetermined device via the vehicle control system in which the vehicle control device controls the predetermined device of the vehicle on the condition that the portable device wirelessly transmits the response signal and receives the response signal based on A vehicle remote control system for remotely operating the vehicle, the mobile relay device configured to be communicable with the vehicle control device and constituting the vehicle remote control system together with the vehicle relay device. And configured to be communicable with a portable repeater capable of communicating with the portable device, receiving the response request signal transmitted from the vehicle control device, and receiving the response request signal to the portable repeater. A transmission / reception means for receiving the response signal wirelessly transmitted from the portable repeater and transmitting the response signal to the vehicle control device, wherein the transmission / reception means transmits the response request signal transmitted from the vehicle control device. Without waiting for the end of reception, the wireless reception state from the vehicle control device is switched to the wireless transmission state to the portable repeater.

  The in-vehicle repeater of the vehicle remote operation system according to attachment 6 is the in-vehicle repeater of the vehicle remote operation system according to attachment 5, wherein the transmission / reception means transmits the response request signal transmitted from the vehicle control device. Then, based on the mark time or the space time, the wireless reception state from the vehicle control device is switched to the wireless transmission state to the portable repeater.

  The in-vehicle repeater of the vehicle remote control system according to appendix 7 is the in-vehicle repeater of the vehicle remote control system according to appendix 5 or 6, wherein the transmission / reception means transmits the response request signal transmitted from the vehicle control device. Carrier sense for wireless transmission of the response request signal to the mobile relay device is started without waiting for the end of reception.

  The mobile relay device of the vehicle remote control system according to appendix 8 is a vehicle control system configured to enable wireless communication between the vehicle control device and the mobile device, and a response request signal transmitted wirelessly from the vehicle control device The predetermined device via the vehicle control system in which the vehicle control device controls the predetermined device of the vehicle on the condition that the portable device wirelessly transmits the response signal and receives the response signal based on A vehicle relay operation system for remotely operating a vehicle, wherein the vehicle relay operation system is configured to be communicable with the portable device and constitutes the vehicle remote operation system together with the portable relay device. , Configured to be communicable with an in-vehicle relay that can communicate with the vehicle control device, and receives the response request signal wirelessly transmitted from the in-vehicle relay and transmits the response request signal to the portable device. And a transmission / reception means for receiving the response signal transmitted from the portable device based on the response request signal and wirelessly transmitting the response signal to the in-vehicle relay device, wherein the transmission / reception means is transmitted from the portable device. Switching from the wireless reception state from the portable device to the wireless transmission state to the in-vehicle relay device is performed without waiting for the completion of reception of the response signal.

  The mobile relay device of the vehicle remote control system according to appendix 9 is the mobile relay device of the vehicle remote control system according to appendix 8, wherein the transmission / reception means detects the reception intensity of the response signal transmitted from the mobile device Then, when the detected reception intensity becomes equal to or higher than a predetermined intensity, the wireless reception state from the portable device is switched to the wireless transmission state to the in-vehicle relay device.

  The mobile relay device of the vehicle remote control system according to appendix 10 is the mobile relay device of the vehicle remote control system according to appendix 8 or 9, wherein the transmission / reception means receives the response signal transmitted from the mobile device. Carrier sense for wireless transmission of the response signal to the vehicle control device is started without waiting for the end.

(Additional effects)
According to the vehicle remote control system according to appendix 1, the in-vehicle relay of the vehicle remote control system according to appendix 5, or the portable relay of the vehicle remote control system according to appendix 8, the response transmitted from the vehicle control device Without waiting for the completion of reception of the request signal, switch from the wireless reception state from the vehicle control device to the wireless transmission state to the portable repeater, or wait for the completion of reception of the response signal transmitted from the portable device Without changing the wireless reception state from the portable device to the wireless transmission state to the in-vehicle repeater. Compared to the case where the internal circuit is switched after waiting for the end of reception of these response request signals and response signals. Thus, wireless transmission can be started quickly, and the possibility of satisfying the time condition can be improved.

  According to the vehicle remote control system described in appendix 2 or the vehicle-mounted repeater of the vehicle remote control system described in appendix 6, based on the transmission time, mark time, or space time of the response request signal transmitted from the vehicle control device Thus, since the wireless reception state from the vehicle control device is switched to the wireless transmission state to the portable repeater, even when switching based on the reception intensity of the response request signal cannot be performed, It becomes possible to determine the switching timing of the internal circuit with certainty.

  According to the mobile remote control system described in appendix 3 or the mobile relay device of the vehicle remote control system described in appendix 9, when the reception strength of the response signal transmitted from the mobile device becomes equal to or higher than a predetermined strength, Switching from the wireless reception state to the in-vehicle repeater to the wireless transmission state to the in-vehicle repeater, even when switching based on analysis of the response request signal cannot be performed easily and reliably Can be determined.

  According to the vehicle remote control system described in appendix 4, the vehicle-mounted relay unit of the vehicle remote control system described in appendix 7, or the mobile relay unit of the vehicle remote control system described in appendix 10, the response transmitted from the vehicle control device Without waiting for the end of reception of the request signal, start carrier sense for wireless transmission of the response request signal to the mobile relay device, or wait for the end of reception of the response signal transmitted from the mobile device Without starting the carrier sense for wireless transmission to the vehicle control device of the response signal without waiting for the end of reception of these response request signal and response signal, compared to the case of starting the carrier sense, Wireless transmission can be started quickly, and the possibility of satisfying the time condition can be further improved.

DESCRIPTION OF SYMBOLS 1 Vehicle remote control system 10 Vehicle-mounted relay machine 11,22 Transmission / reception circuit 12 Output part 13,23,111,121 Basic transmission / reception circuit 14,24 Relay transmission / reception circuit 15,122 Response request signal reception circuit 16,123 Response signal transmission circuit 17, 28 first relay receiving circuit 18, 27 first relay transmitting circuit 20 portable relay machine 21 operation switch 25, 112 response request signal transmitting circuit 26, 113 response signal receiving circuit 100 vehicle control system 110 vehicle control device 120 portable machine

Claims (6)

A vehicle control system configured to enable wireless communication between a vehicle control device and a portable device, wherein the portable device wirelessly transmits a response signal based on a response request signal wirelessly transmitted from the vehicle control device, A vehicle remote control system for remotely operating the predetermined device via a vehicle control system in which the vehicle control device controls the predetermined device of the vehicle under at least one condition that a response signal is received,
An in-vehicle repeater capable of communicating with the vehicle control device;
A portable repeater capable of communicating with the portable device;
The in-vehicle repeater is
Transmission / reception of receiving the response request signal transmitted from the vehicle control device and wirelessly transmitting it to the portable relay device, and receiving the response signal wirelessly transmitted from the portable relay device and transmitting it to the vehicle control device With means,
The portable repeater is
The response request signal wirelessly transmitted from the in-vehicle relay device is received and transmitted to the portable device, and the response signal transmitted based on the response request signal is received from the portable device to receive the response request signal. A transmission / reception means for wireless transmission to
The transmission / reception means of the portable relay device includes basic transmission / reception means for performing wireless communication with the portable device, and relay transmission / reception means for performing wireless communication with the in-vehicle relay device,
The basic transmission / reception means in the transmission / reception means of the portable repeater includes a response request signal transmission circuit for wirelessly transmitting a response request signal transmitted from the in-vehicle relay to the portable device, and a response wirelessly transmitted from the portable device. A response signal receiving circuit for receiving a signal,
When the transmission / reception means of the portable relay device determines that transmission of the response signal from the portable device has been started, the transmission / reception means does not wait for completion of reception of all the response signals to the relay transmission / reception means. By switching the circuit to be connected to the response signal receiving circuit from the response request signal transmission circuit, the transmission / reception state of the signal to the in-vehicle relay device in the portable relay device is switched from the reception state to the transmission state,
Vehicle remote control system. The transmission / reception means of the portable repeater detects the reception strength of the response signal transmitted from the portable device, and connects to the relay transmission / reception means when the detected reception strength becomes a predetermined strength or more. Switching the response request signal transmission circuit to the response signal reception circuit ,
The vehicle remote control system according to claim 1. The transmission / reception means of the portable repeater performs carrier sense for performing wireless transmission of the response signal to the in-vehicle repeater without waiting for the reception of all the response signals transmitted from the portable device. Start,
The vehicle remote control system according to claim 1 or 2. A vehicle control system configured to enable wireless communication between a vehicle control device and a portable device, wherein the portable device wirelessly transmits a response signal based on a response request signal wirelessly transmitted from the vehicle control device, A portable device for configuring a vehicle remote control system for remotely operating the predetermined device via a vehicle control system in which the vehicle control device controls the predetermined device of the vehicle on the condition that at least one response signal is received A relay machine,
Configured to communicate with the portable device;
An in-vehicle relay that constitutes the vehicle remote control system together with the portable relay, and is configured to be communicable with the in-vehicle relay that can communicate with the vehicle control device,
The response request signal wirelessly transmitted from the in-vehicle relay device is received and transmitted to the portable device, and the response signal transmitted based on the response request signal is received from the portable device to receive the response request signal. A transmission / reception means for wireless transmission to
The transmission / reception means includes basic transmission / reception means for performing wireless communication with the portable device, and relay transmission / reception means for performing wireless communication with the in-vehicle relay device,
The basic transmission / reception means in the transmission / reception means includes a response request signal transmission circuit for wirelessly transmitting a response request signal transmitted from the in-vehicle relay device to the portable device, and a response for receiving a response signal wirelessly transmitted from the portable device. A signal receiving circuit,
When it is determined that transmission of a response signal from the portable device has started, the transmission / reception unit is connected to the relay transmission / reception unit without waiting for the reception of all the response signals. By switching from the response request signal transmission circuit to the response signal reception circuit, the signal transmission / reception state to the in-vehicle relay device in the portable relay device is switched from the reception state to the transmission state,
Mobile repeater for vehicle remote control system. The transmission / reception means detects a reception intensity of the response signal transmitted from the portable device, and a circuit connected to the relay transmission / reception means when the detected reception intensity is equal to or higher than a predetermined intensity, Switching from the response request signal transmitting circuit to the response signal receiving circuit,
The portable relay machine of the vehicle remote control system according to claim 4. The transmission / reception means starts carrier sense for performing wireless transmission of the response signal to the in-vehicle repeater without waiting to finish receiving all the response signals transmitted from the portable device.
The portable relay machine of the vehicle remote control system according to claim 4 or 5.

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