JP6414694B2 - Wireless communication device - Google Patents

Description

  The present invention relates to a wireless communication apparatus that performs communication between an in-vehicle device provided in a vehicle and a portable device carried by a user, and remotely controls the vehicle according to the relative position of the portable device.

  2. Description of the Related Art There is known a vehicle control device that performs communication between an in-vehicle device provided in a vehicle and a portable device carried by a user and remotely controls the vehicle according to the relative position of the portable device. For example, a technology is disclosed that controls a door lock when a portable device detects that a portable device has moved from a vehicle exterior region that can communicate with the vehicle-mounted device to a vehicle exterior region that cannot communicate with the vehicle-mounted device (see Patent Document 1). ).

JP 2007-146396 A

  A technique such as Patent Document 1 is used in a so-called smart entry system. Accordingly, a new function can be added without adding a new operation unit such as an operation button to the portable device. However, there is a problem that an operation unit (for example, a lock button, an unlock button, etc.) already provided in the portable device cannot be eliminated or reduced, and the portable device cannot be reduced in size.

  With the above problem as a background, an object of the present invention is to provide a wireless communication apparatus that can reduce the size of a portable device by eliminating or reducing operation buttons while maintaining the functions of the portable device.

A wireless communication apparatus for solving the above problems is
Including an in-vehicle device mounted on a vehicle and a portable device possessed by a user,
The in-vehicle device includes an antenna and an in-vehicle device transmission unit that transmits a communication signal to the portable device via the antenna,
When the portable device determines that the portable device is within a transmission area set in advance around the antenna based on the reception state of the portable device and the communication signal reception unit that receives the communication signal, the reception includes the result. A reception information creation unit that creates and outputs information, acquires the reception information, and based on the reception information, the portable device determines whether communication with the in-vehicle device is possible, and communication state information including the result is obtained. A state information creation unit to be created, an operation unit including an operation button operated by a user, a generation unit that generates a transmission code corresponding to the operation button when the operation button is operated, and the generated transmission code to the in-vehicle device A transmission unit for transmitting, and the generation unit generates different transmission codes for the operation of the same operation button according to the communication state information.

  With the above configuration, a plurality of transmission codes can be assigned to one operation button, and the number of operation buttons can be reduced to achieve downsizing of the portable device.

The figure which shows the structure of the portable device in a radio | wireless communication apparatus. The figure which shows the structure of the vehicle-mounted apparatus in a radio | wireless communication apparatus. The figure which shows the relationship between an antenna and a transmission area (Example 1). The flowchart explaining the received signal determination process of a portable machine (Example 1). The flowchart explaining the communication state determination process of a portable machine (Example 1). The flowchart explaining the transmission control processing of a portable machine (Example 1). The figure which shows the relationship between an antenna and a transmission area (Example 2). The flowchart explaining the received signal determination process of a portable machine (Example 2). The flowchart explaining the communication state determination process of a portable machine (Example 2). The flowchart explaining the transmission control processing of a portable machine (Example 2).

  The wireless communication device 1 includes a portable device 100 (see FIG. 1) possessed by a user and an in-vehicle device 200 (see FIG. 2) mounted on a vehicle 300.

  As shown in FIG. 1, the portable device 100 includes a control unit 110 (state information creation unit and generation unit of the present invention), an operation button 120 (operation unit of the present invention) connected to the control unit 110, a memory 130, and a reception. A unit 150 (a portable device receiver of the present invention), a transmitter 160 (a portable device transmitter of the present invention), a display 170, and a buzzer 180.

  The control unit 110 is configured as a computer including, for example, a well-known CPU and a signal input / output circuit (both not shown). Then, the CPU executes the portable device control program stored in the memory 130, thereby realizing various functions of the portable device 100.

  The operation button 120 is mainly used for a remote keyless entry (hereinafter abbreviated as “RKE”) function, and for example, a known mechanical switch is used. Depending on the operation content, for example, an RKE command for locking / unlocking the door and unlocking the trunk is included in the transmission code and transmitted from the transmission unit 160. There may be at least one operation button 120.

  The memory 130 uses, for example, a nonvolatile storage medium such as a flash memory, and stores data necessary for the operation of the portable device 100 such as a portable device ID for identifying the portable device 100 in addition to the portable device control program. To do.

  The receiving unit 150 receives a communication signal transmitted from the in-vehicle device 200 using, for example, an LF (long wave) radio wave via the antenna 151. The reception unit 150 includes a demodulation unit 152 (measurement unit of the present invention) and a communication presence / absence determination unit 153 (reception information creation unit of the present invention). Demodulator 152 demodulates the communication signal received via antenna 151 to generate the original signal (demodulated signal), further measures the received electric field strength of the communication signal, and outputs the demodulated signal and the received electric field strength . The communication presence / absence determining unit 153 creates reception information (details will be described later) based on the demodulated signal from the demodulation unit 152 and the received electric field strength, and outputs the reception information to the control unit 110. A configuration in which the communication presence / absence determining unit 153 is included in the control unit 110 may be employed. The transmission unit 160 includes an antenna 161, and transmits a radio signal (such as an RKE command) to the in-vehicle apparatus 200 via, for example, a radio wave in the UHF (high frequency) band via the antenna 161.

  The radio wave used for communication between the portable device 100 and the in-vehicle device 200 is such that the reach distance of the radio wave transmitted from the portable device 100 to the in-vehicle device 200 is greater than the reach distance of the radio wave transmitted from the in-vehicle device 200 to the portable device 100. It is desirable to adjust the frequency band of radio waves and the transmission output so as to be longer.

  The display unit 170 is constituted by, for example, a well-known LCD, and displays the operation state of the portable device 100. The buzzer 180 notifies the operation state of the portable device 100 with sound.

  As shown in FIG. 2, the in-vehicle device 200 includes an ECU 210, a transmission unit 211 (an in-vehicle device transmission unit of the present invention) and a reception unit 212 connected to the ECU 210. Also, the indoor antenna 213, the right door antenna 214 provided in the right door 201 on the right side in the traveling direction A of the vehicle 300, the left door antenna 215 provided in the left door 202 on the left side, and the back door 203 were provided. A back door antenna 216 (antenna of the present invention) is connected to the transmitter 211.

  A door lock ECU 220 is connected to the ECU 210. The door lock ECU 220 is connected to a right door lock device 221 (for the right door 201), a left door lock device 222 (for the left door 202), and a back door lock device 223 (for the back door 203). The door lock device switches the state of each door to either locking / unlocking.

  ECU 210 is configured as a computer including a well-known CPU, a memory for storing an in-vehicle device control program and data, a signal input / output circuit (none of which is shown), and the like. Various functions of the in-vehicle device 200 are realized by the CPU executing the in-vehicle device control program.

  The transmission unit 211 transmits a communication signal to the portable device 100 using, for example, an LF band radio wave. A communication signal transmitted from the transmission unit 211 reaches only within a predetermined transmission area (see FIGS. 3 and 7) via the indoor antenna 213, the right door antenna 214, the left door antenna 215, and the back door antenna 216.

  The receiving unit 212 receives a communication signal transmitted from the portable device 100 using, for example, UHF band radio waves. The receiving unit 212 can receive a communication signal from the portable device 100 even when the portable device 100 is located away from the transmission area.

  With the above configuration, the wireless communication device 1 transmits a response request signal to the portable device 100 from the in-vehicle device 200 via the transmission unit 211 in the normal operation mode. The portable device that has received the response request signal via the reception unit 150 transmits a response signal including a portable device ID for identifying itself to the in-vehicle device 200 via the transmission unit 160. The ECU 210 collates the portable device ID received via the receiving unit 212 with the master code stored in advance in the memory, and when the two collate and the collation is normally performed, for example, the door is locked or opened. A control signal including a lock permission is output to the door lock ECU 220. The door lock ECU 220 locks or unlocks each door lock device (221 to 223) based on the control signal.

  Moreover, the said structure can be said to be the same as that of the smart entry system which implement | achieves the various functions in a vehicle by radio | wireless communication between the portable machine which a user possesses, and the vehicle-mounted apparatus mounted in the vehicle. The smart entry system is one of the wireless communication devices for vehicles, and it authenticates by wireless communication between the portable device and the in-vehicle device without using a mechanical key. Based on the authentication result, Operations desired by the user, such as unlocking / locking the door lock device, can be performed. In this case, since the user does not need to operate the portable device, the portable device is often left in a bag, for example, and it is considered that there are not many opportunities to operate the operation buttons.

  The portable device of the smart entry system is provided with about two operation buttons (for locking and unlocking). It can be said that the operation buttons that the user hardly uses increase the size of the portable device and increase the cost. However, eliminating the operation buttons at all impairs user convenience. Then, if it is set as the structure which transmits a different transmission code with one operation button like this invention, the operation button which was two, for example can be reduced to one, and a user's convenience can also be ensured.

  First, the Example using one antenna among the antennas of the vehicle equipment 200 is shown. In this embodiment, an indoor antenna 213 is used. Of course, other antennas may be used.

  In FIG. 3, an arrival range (transmission area) of a transmission signal from the indoor antenna 213 is indicated by R. Although the transmission signal may reach further from the transmission area R than the transmission area R, the transmission area R is set in consideration of whether or not the portable device 100 can reliably receive the transmission signal.

  FIG. 4 shows received signal determination processing executed by the communication presence / absence determining unit 153 of the portable device 100. This process may be executed every predetermined period, or may be executed when the demodulator 152 outputs a demodulated signal and received electric field strength (hereinafter referred to as “RSSI”) as a trigger.

  First, in the state of waiting for reception of a radio wave from the in-vehicle device 200, when a radio wave is received and a demodulated signal and RSSI are acquired from the demodulator 152 (S11: Yes), it is determined whether the code is a normal code. The portable device 100 and the in-vehicle device 200 are associated in advance. When using a new portable device, a predetermined registration operation is performed, and the portable device ID is registered in the in-vehicle device 200. The in-vehicle device 200 includes the portable device ID that is the transmission destination in the transmission signal. The portable device 100 confirms whether the received radio wave is a regular transmission signal (data configuration confirmation, error check), or whether the portable device ID included in the transmission signal matches its own.

  The communication signal includes antenna information indicating from which antenna the signal is transmitted. In the case of FIG. 3, the antenna information of the received communication signal is referred to and it is confirmed whether the signal is transmitted from the indoor antenna 213.

  If it is not a regular code (S12: No), this process is terminated. On the other hand, when the code is a regular code (and transmitted from the indoor antenna 213) (S12: Yes), it is determined whether the RSSI is equal to or higher than a predetermined threshold value Emin. Emin is, for example, RSSI at the outer edge of the transmission area R in FIG. 3 and in the vicinity thereof.

  When RSSI is less than Emin (S13: No), this process is terminated. On the other hand, when the RSSI is equal to or greater than Emin (S13: Yes), reception information indicating that the portable device 100 is in the transmission area R is generated and output to the control unit 110 (S14).

  The above-described configuration is as follows: “The portable device receiving unit includes a measuring unit that measures the received electric field strength of the received communication signal, and the received information generating unit is configured such that the received electric field strength exceeds a predetermined threshold and the communication signal When the content of the mobile phone is authentic, it is determined that the portable device is within the transmission area. A method of determining where the portable device is using the received electric field strength is often used. With this configuration, even if there is a portable device owned by another user in the vicinity of the vehicle, the reception information can be created more accurately without being influenced by the configuration.

  FIG. 5 shows communication state determination processing executed by the control unit 110 of the portable device 100. This process is executed at a predetermined cycle.

  First, when the reception information including that the portable device 100 is in the transmission area R is not acquired from the communication presence / absence determination unit 153 (S31: No), the value of the timer T is updated (S36). Thereafter, the process proceeds to S34. On the other hand, when the reception information is acquired (S31: Yes), the communication state information is set to indicate that communication with the in-vehicle device 200 is possible ("communication possible") (S32). Next, zero is set in the timer T (S33). Thereafter, the process proceeds to S34.

  In S34, it is determined whether or not the value of the timer T exceeds the threshold value Tmax. When it does not exceed Tmax (S34: No), this process ends. On the other hand, when Tmax is exceeded (S34: Yes), the communication status information is set to indicate that communication with the in-vehicle device 200 is not possible ("communication impossible") (S35). Thereafter, this process is terminated.

  The above-mentioned configuration is “when the reception information is acquired, the state information creation unit determines that communication with the in-vehicle device is possible, and when the reception information is not continuously acquired for a predetermined time, the in-vehicle device "It is determined that communication with is not possible". With this configuration, for example, when the user moves along the vicinity of the outer edge of the transmission area, the communication state information can be prevented from changing in a short time between “communication enabled” and “communication disabled”. Thereby, it is possible to prevent a transmission code not intended by the user from being generated.

  The communication status information is stored in a predetermined area of the memory 130.

The threshold value Tmax of the timer T is set as follows, for example.
Since the communication signal (response request signal) is transmitted from the in-vehicle device 200 at a predetermined transmission cycle, the time from the reception of the communication signal to the reception of at least the next communication signal (that is, the transmission cycle) Set longer.
In addition, even when the portable device 100 is in the transmission area R, the value is set to a value about several times the transmission cycle in consideration of the inability to receive a communication signal due to the influence of noise or interference.

  FIG. 6 shows a transmission control process executed by the control unit 110 of the portable device 100. This process is executed at a predetermined cycle. The operation of the operation button 120 may be executed as a trigger.

  First, when it is detected that the operation button 120 has been operated (S51: Yes), the communication state information stored in the memory 130 is referred to (S52).

  When the communication status information indicates “communicable” (S53: Yes), a transmission code for instructing unlocking of all the doors of the vehicle 300 is created (S54). Thereafter, the process proceeds to S55. On the other hand, when the communication status information indicates “communication impossible” (S53: No), a transmission code for instructing locking of all doors is created (S56). Thereafter, the process proceeds to S55.

  The above configuration is “when the generation unit is in a state where it can receive a communication signal, it generates a transmission code for unlocking the door lock device of the vehicle, and when it is in a state where communication with the in-vehicle device is not possible. , Generate a transmission code for locking the door lock device ”. With this configuration, a single operation button can be used for both the “lock” button and the “unlock” button, which are conventionally provided separately. Further, when the communication state is not good, the door lock device is locked, so that security is improved.

  In S55, the transmission code created above is transmitted to the in-vehicle device 200.

  The above-described configuration is as follows: “The in-vehicle device includes a plurality of antennas, and when the reception information generation unit receives communication signals from the plurality of antennas, the reception information generation unit selects one of the plurality of communication signals and generates reception information. To do. With this configuration, it is possible to select the antenna of the door that the user wants to operate, and the convenience for the user is improved.

Any of the following may be used as an antenna selection method.
In the vicinity of the antenna to be selected, a selection operation (for example, long press of a button, simultaneous press of a plurality of buttons) is performed with the operation button 120 of the portable device 100
An antenna having a high communication frequency with the portable device 100. For example, the control unit 110 transmits a communication signal (for example, a response request signal) by designating an antenna with a predetermined communication cycle in the order of the indoor antenna 213, the right door antenna 214, the left door antenna 215, and the back door antenna 216. . Therefore, the in-vehicle device 200 can determine which antenna the response signal from the portable device 100 has responded to the response request signal transmitted from. The reception state of this response signal is stored in the memory as a history, and for example, the antenna having the highest reception frequency within a predetermined period is selected.
・ In the initial setting, select the antenna installed in the driver's seat.

  The Example using a some antenna among the antennas of the vehicle equipment 200 is shown. In this embodiment, all antennas other than the indoor antenna 213 are used. Of course, there are no restrictions on the combination of antennas used.

  The antenna selection method is the same as in the first embodiment. In addition, when selecting antennas based on the communication frequency, a predetermined number of antennas may be selected in descending order of communication frequency.

  FIG. 7 shows the transmission area of each antenna. The transmission area of the right door antenna 214 is RR, the transmission area of the left door antenna 215 is RL, and the transmission area of the back door antenna 216 is RB.

  FIG. 8 shows received signal determination processing executed by the communication presence / absence determination unit 153 of the portable device 100. This process may be executed at a predetermined cycle, or may be executed when the demodulator 152 outputs a demodulated signal and RSSI as a trigger.

  The configuration of FIG. 8 is “the in-vehicle device includes a plurality of antennas, and the reception information creation unit creates reception information based on a communication signal from a predetermined antenna among the plurality of antennas”. is there. With this configuration, for example, if a door that is frequently used by the user is selected, the convenience of the user is improved.

  First, in the state of waiting for reception of a radio wave from the in-vehicle device 200, when any radio wave is received and a demodulated signal and RSSI are acquired from the demodulator 152 (S71: Yes), it is determined whether or not it is a normal code. The determination method is the same as in FIG.

  If it is not a regular code (S72: No), this process is terminated. On the other hand, when it is a regular code (S72: Yes), it is determined whether RSSI is equal to or greater than a predetermined threshold value Emin. Emin is RSSI at the outer edge of the transmission areas RR, RL, and RB of each door in FIG. When the transmission power of each transmission antenna is different, Emin may be set for each transmission antenna.

  When the RSSI is lower than Emin (S73: No), this process is terminated. On the other hand, when the RSSI is equal to or greater than Emin (S73: Yes), the antenna information of the received communication signal is referred to and it is determined from which antenna the signal is transmitted. When the communication signal is not from any of the selected antennas (S82: No), this process ends.

  When the communication signal is transmitted from the right door antenna 214 (S74: Yes), the value of ER that is the RSSI of the right door 201 stored in the memory 130 is updated (S75). Next, it compares with RSSI of another door. If ER ≧ EL (RSSI of the left door 202) and ER ≧ EB (RSSI of the back door 203) are not satisfied (S76: No), this processing is terminated. You may advance to S78. On the other hand, when ER ≧ EL and ER ≧ EB (S76: Yes), the reception information that the portable device 100 is in the right door transmission area RR is created and output to the control unit 110 (S77).

  When the communication signal is transmitted from the left door antenna 215 (S74: No → S78: Yes), the value of EL that is the RSSI of the left door 202 stored in the memory 130 is updated (S79). Next, it compares with RSSI of another door. When EL> ER and EL ≧ EB are not satisfied (S80: No), this process is terminated. You may advance to S82. On the other hand, when EL> ER and EL ≧ EB (S80: Yes), reception information indicating that the portable device 100 is in the left door transmission area RL is created and output to the control unit 110 (S81).

  When the communication signal is transmitted from the back door antenna 216 (S78: No → S82: Yes), the value of EB that is the RSSI of the back door 203 stored in the memory 130 is updated (S83). Next, it compares with RSSI of another door. When EB> ER and EB> EL are not satisfied (S84: No), this process ends. On the other hand, when EB> ER and EB> EL (S84: Yes), reception information indicating that the portable device 100 is within the backdoor transmission area RB is created and output to the control unit 110 (S85).

  The above-described configuration is as follows: “The in-vehicle device includes a plurality of antennas, and when the reception information generation unit receives communication signals from the plurality of antennas, the reception information generation unit selects one of the plurality of communication signals and generates reception information. To do. With this configuration, it is possible to more accurately determine whether communication with the in-vehicle device is possible, and it is possible to prevent the door lock device not intended by the user from operating.

  In the example of FIG. 8, priority is provided for determination of the transmission area. That is, when the RSSI of the right door 201 and the left door 202 is the same, the right door 201 is selected. When the RSSI of the right door 201 and the back door 203 is the same, the right door 201 is selected. Furthermore, when the RSSI of the left door 202 and the back door 203 is the same, the left door 202 is selected. That is, the door priority is the highest for the right door 201, followed by the left door 202 and the back door 203. When the right door 201 is a driver's seat door, the portable device 100 is expected to be often in the right door transmission area RR. As a result, the reception information indicating that the portable device 100 is in the right door transmission area RR is created with priority over other doors, thus improving the convenience for the user.

When updating ER, EL, and EB, a correction coefficient for correcting these values may be set using at least one of the following. The correction coefficient is stored in the memory 130. The correction coefficient may be added or multiplied.
When the transmission power from the antenna of each door is different, the RSSI is different even if the distance from the antenna is the same, so a correction coefficient for correcting the difference in transmission power is set.
As described above, when a priority is provided for a door, a correction coefficient is set according to the priority. For example, right door correction coefficient> left door correction coefficient> back door correction coefficient. The correction coefficient is set in advance according to the priority.
The user sets the priority for the door by performing the setting operation of the operation button 120. The higher the priority is, the larger the correction coefficient is set.

  The above-described configuration is “priorities are set for a plurality of antennas, and the reception information creation unit creates reception information based on communication signals from antennas selected based on priority”. With this configuration, for example, if the priority of the door that the user wants to use is increased, the convenience of the user is improved.

  FIG. 9 shows communication state determination processing executed by the control unit 110 of the portable device 100. This process is executed at a predetermined cycle.

  First, when the reception information including that the portable device 100 is in the transmission area R is not acquired from the communication presence / absence determination unit 153 (S91: No), the value of the timer T is updated (S100). Thereafter, the process proceeds to S95. On the other hand, when the reception information is acquired (S91: Yes), processing is executed as follows according to the content of the reception information.

  When the received information includes that the portable device 100 is in the right door transmission area RR (S92: Yes), the communication status information indicates that communication with the right door antenna 214 is possible ("right door" Communication is possible ”) (S93). Thereafter, the process proceeds to S94.

  When the reception information includes the fact that it is within the left door transmission area RL (S92: No → S97: Yes), the communication status information indicates that communication with the left door antenna 215 is possible (“left door” Communication is possible ”) (S98). Thereafter, the process proceeds to S94.

  When the received information includes information indicating that the received information is within the backdoor transmission area RB (S97: No), it indicates that communication with the backdoor antenna 216 is possible ("backdoor communication is possible") (S99). . Since the reception information is created when a regular communication signal is received, the reception information is in the back door transmission area RB by the erasure method unless it is included in the transmission area of the right door or the left door. Thereafter, the process proceeds to S94.

  In S94, the timer T is set to zero. Thereafter, the process proceeds to S95.

  In S95, it is determined whether or not the value of the timer T exceeds the threshold value Tmax. When it does not exceed Tmax (S95: No), this process ends. On the other hand, when Tmax is exceeded (S95: Yes), the communication state information is set to indicate that communication with the in-vehicle device 200 is not possible ("communication impossible") (S96). Thereafter, this process is terminated. The threshold value Tmax is the same as that in FIG.

  The communication status information is stored in a predetermined area of the memory 130.

  FIG. 10 shows a transmission control process executed by the control unit 110 of the portable device 100. This process is executed at a predetermined cycle. The operation of the operation button 120 may be executed as a trigger.

  First, when it is detected that the operation button 120 is operated (S111: Yes), the communication state information stored in the memory 130 is referred to (S112). Then, according to the communication status information, a transmission code is created as follows.

  When the communication status information indicates “Right door communication is possible” (S113: Yes), a transmission code for instructing unlocking of the right door 201 of the vehicle 300 is created (S114). Thereafter, the process proceeds to S115.

  When the communication status information indicates “Left door communication is possible” (S113: No → S116: Yes), a transmission code for instructing unlocking of the left door 202 of the vehicle 300 is created (S117). Thereafter, the process proceeds to S115.

  When the communication status information indicates “backdoor communication is possible” (S116: No → S118: Yes), a transmission code for instructing unlocking of the back door 203 of the vehicle 300 is created (S119). Thereafter, the process proceeds to S115.

  When the communication status information does not indicate “backdoor communication is possible”, that is, indicates “communication is not possible” (S118: No), a transmission code for instructing locking of all doors is created (S120). Thereafter, the process proceeds to S115.

  In S115, the transmission code created above is transmitted to the in-vehicle device 200.

  Although the embodiments have been described above, these are merely examples and are not limited to the above-described embodiments, and various modifications based on the knowledge of those skilled in the art are possible without departing from the scope of the claims. It is.

DESCRIPTION OF SYMBOLS 1 Wireless communication apparatus 100 Portable machine 110 Control part (state information creation part, production | generation part)
120 Operation buttons (operation unit)
150 Receiver (portable device receiver)
152 Demodulation unit (measurement unit)
153 Communication presence / absence determination unit (reception information creation unit)
160 Transmitter (portable device transmitter)
200 in-vehicle device 211 transmission unit (in-vehicle device transmission unit)
213 Indoor antenna (antenna)
214 Right door antenna (antenna)
215 Left door antenna (antenna)
216 Backdoor antenna (antenna)
221 Right door lock device (door lock device)
222 Left door lock device (door lock device)
223 Back door lock device (door lock device)
300 vehicles

Claims (7)

Including an in-vehicle device mounted on a vehicle and a portable device possessed by a user,
The in-vehicle device is
An antenna,
An in-vehicle device transmitter for transmitting a communication signal to the portable device via the antenna;
With
The portable device is
A portable receiver that receives the communication signal;
Based on the reception state of the communication signal, when it is determined that the portable device is within a transmission area set in advance around the antenna, a reception information creation unit that creates and outputs reception information including the result; and
Obtaining the reception information, based on the reception information, the portable device determines whether communication with the in-vehicle device is possible, and creates a state information creation unit that creates communication state information including the result;
An operation unit including an operation button operated by the user;
When the operation button is operated, a generation unit that generates a transmission code corresponding to the operation button;
A portable device transmitter for transmitting the generated transmission code to the in-vehicle device;
With
The said production | generation part is a radio | wireless communication apparatus which produces | generates a different transmission code with respect to operation of the same operation button according to the said communication status information. The portable device receiving unit includes a measuring unit that measures the received electric field strength of the received communication signal,
The reception information creation unit determines that the portable device is within the transmission area when the received electric field intensity exceeds a predetermined threshold and the content of the communication signal is authentic,
The state information creation unit determines that communication with the in-vehicle device is possible when the reception information is acquired;
The wireless communication device according to claim 1, wherein when the received information is not continuously acquired for a predetermined time, it is determined that communication with the in-vehicle device is not possible. The generation unit generates a transmission code for unlocking the door lock device of the vehicle when communication with the in-vehicle device is possible,
The wireless communication device according to claim 1, wherein when the communication with the in-vehicle device is not possible, a transmission code for locking the door lock device is generated. The in-vehicle device includes a plurality of the antennas,
The wireless communication according to any one of claims 1 to 3, wherein the reception information creation unit creates reception information based on a communication signal from a predetermined antenna among the plurality of antennas. apparatus. The in-vehicle device includes a plurality of the antennas,
4. The reception information creation unit, when receiving the communication signal from the plurality of antennas, selects one of the plurality of communication signals to create the reception information. The wireless communication device according to claim 1.   6. The reception information creation unit according to claim 5, wherein the reception information creation unit creates the reception information by selecting a communication signal having the highest received electric field strength from among the communication signals received from the plurality of antennas. Wireless communication device. Priorities are set for the plurality of antennas,
The wireless communication apparatus according to claim 5, wherein the reception information creation unit creates the reception information based on a communication signal from an antenna selected based on the priority.

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