JP2003027792A - Method for identifying portable transmitter-receiver in in-vehicle equipment remote control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for quickly identifying one of a plurality of portable transmitter-receivers and enhances the responsiveness of an in-vehicle equipment remote control device even if the transmitter-receivers compatible with a single vehicle are present in a range where communication is possible with respect to an in-vehicle transmitter and an in-vehicle receiver. SOLUTION: According to the method, the portable transmitter-receivers compatible with the single vehicle are distinguished from each other, and request signals specific to the respective portable transmitter-receivers can be transmitted from the in-vehicle transmitter. Further, whenever communication is held between the in-vehicle transmitter or the in-vehicle receiver and one of the portable transmitter-receivers, the one portable transmitter-receiver is stored in the in-vehicle transmitter or the in-vehicle receiver as a communication target. When a request signal is transmitted from the in-vehicle transmitter to specific one of the portable transmitter-receivers as the communication target, under a condition in which the portable transmitter-receivers compatible with the single vehicle are present in the range where communication with respect to the in-vehicle transmitter and the in-vehicle receiver is possible, the one portable transmitter-receiver which has been the communication target is preferentially specified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable transmitter / receiver carried by a vehicle user, which transmits reply data to a vehicle-side receiver in response to reception of a request signal of a regular code transmitted from the vehicle-side transmitter. The present invention relates to a vehicle-mounted device remote control device adapted to switch between a locked state and an unlocked state of the vehicle-mounted device.

[0002]

2. Description of the Related Art Conventionally, such a remote control device for vehicle equipment is
For example, it is already known in JP-A-11-336394.

[0003]

By the way, in the case where a plurality of portable transmitters / receivers corresponding to the vehicle are present within a range in which communication with the vehicle-side transmitter and receiver is possible,
If you send a request signal from the vehicle-side transmitter without specifying those portable transmitters / receivers, the reply data will be transmitted from the multiple portable transmitters / receivers to the vehicle-side receiver at the same time.
The control unit on the vehicle side cannot read the data.

Therefore, in the conventional on-vehicle equipment remote control device, the interference signal is selected by selecting the anti-collision mode in which the request signal specifying one of the plurality of portable transmitters / receivers is transmitted from the vehicle side transmitter. To prevent
The data from the portable transmitter / receiver can be surely read on the vehicle side. However, every time such an anti-collision mode is selected, a process for identifying one of the portable transmitter / receivers is executed. Therefore, it takes time to identify one of the portable transmitter / receiver, and there is a problem in responsiveness.

The present invention has been made in view of the above circumstances, and a plurality of portable transmitters / receivers intended for the same vehicle are present within a range in which communication with the vehicle-side transmitter and receiver is possible. It is an object of the present invention to provide a method of identifying a portable transmitter / receiver in an in-vehicle device remote control device that promptly identifies one of the plurality of portable transmitters / receivers to enhance responsiveness.

[0006]

In order to achieve the above object, the invention according to claim 1 is a vehicle-side transmitter arranged in a vehicle, a vehicle-side receiver arranged in the vehicle, and a vehicle. A vehicle is equipped with a portable transmitter / receiver that transmits reply data in response to receiving a request signal of a regular code transmitted by the transmitter on the side, and a vehicle-mounted device lock unit that switches the locked state and the unlocked state of the vehicle-mounted device. A plurality of portable transmitters / receivers intended for the same vehicle in an in-vehicle device remote control device for switching and operating the in-vehicle device lock means in response to reception of reply data from the portable transmitter / receiver on the side receiver. The mobile side transmitter and receiver can transmit individual request signals for each mobile transmitter / receiver, and communication between the vehicle side transmitter / receiver and the mobile transmitter / receiver can be performed. Communication every time it is established The mobile transmitters / receivers that became the elephant are stored, and a plurality of mobile transmitters / receivers intended for the same vehicle are present in a range where communication with the vehicle-side transmitter and receiver is possible. When transmitting a request signal that specifies one of the receivers as a communication target from the vehicle-side transmitter, the mobile transmitter / receiver that was the communication target when the previous communication was established is specified with priority. And

According to the method of the invention described in claim 1, when there are a plurality of portable transmitters / receivers for the same vehicle within a range in which the transmitter and the receiver of the vehicle can communicate with each other, Since there is a high possibility that the portable transmitter / receiver that has established communication with the vehicle-side transmitter / receiver is one of the plurality of portable transmitters / receivers, one portable transmitter / receiver is used as a communication target.
In specifying the receiver, the mobile transmitter / receiver that was the communication target when the previous communication was established was specified with priority, so that the transmitter / receiver on the vehicle side and the mobile transmitter / receiver
The communication with the receiver can be quickly established and the responsiveness can be improved.

The invention according to claim 2 is the above-mentioned claim 1.
In addition to the configuration of the invention described above, each mobile transmitter / receiver is individually assigned a management number, and each mobile transmitter / receiver is assigned a management number.
Characterized by identifying the receiver.

According to the method of the invention described in claim 2, the communication time required to specify one of the plurality of portable transmitters / receivers can be shortened and the responsiveness can be further enhanced. That is, in identifying a plurality of portable transmitters / receivers, it is simply possible to give a unique ID to each portable transmitter / receiver, but portable transmitters / receivers with the same ID in the vicinity of the same vehicle. In order to minimize the possibility that there is such a problem, it is necessary to set a large number of mobile transmitter / receiver-specific IDs to the number of vehicles produced, and communication is performed by specifying such many types of IDs. Time will increase. On the other hand, at most 3 to 4 mobile phones for the same vehicle
The communication time of the management number necessary for identifying the receiver can be extremely short, and the communication time can be shortened to further improve the responsiveness.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below based on an embodiment of the present invention shown in the accompanying drawings.

1 to 3 show an embodiment of the present invention, FIG. 1 is a diagram showing a schematic configuration of an on-vehicle equipment remote control device, and FIG. 2 shows a part of a transmission control procedure by an electronic control unit. FIG. 3 is a flowchart showing the rest of the transmission control procedure by the electronic control unit.

First, in FIG. 1, vehicle-side external transmitters 2L and 2R are provided on a vehicle V on both left and right outer sides of a vehicle compartment 1,
A vehicle-side internal transmitter 3 and a vehicle-side receiver 4 are provided in the vehicle V in the passenger compartment 1.

The vehicle V is provided with a door lock means 6, a steering lock means 10 and an engine start control means 12, which are means for locking on-vehicle equipment. The door lock means 6 is provided on the left and right sides of the vehicle V. Doors 5L, 5R
The locked state and the unlocked state of the steering wheel can be automatically switched, and the steering lock means 10 can switch the locked state and the unlocked state of the steering wheel in which the steering wheel 11 is inoperable.
Further, the engine start control means 12 has a start button 1
It is configured to switch permission / prohibition of starting the engine in accordance with the operation of 3.

On the outer surfaces of the doors 5L and 5R, switching intention detecting means 7L and 7R for detecting the switching intention of the vehicle user for switching the locked state and the unlocked state of the doors 5L and 5R, respectively, are attached. The switching intention detecting means 7L, 7R are operated by the vehicle user when the vehicle user gets off the vehicle, and unlock switches 8L, 8R for detecting the switching intention from the locked state to the unlocked state when the vehicle user touches the vehicle. The lock switches 9L and 9R detect the intention to switch from the unlocked state to the locked state.

Portable transmitter / receiver 1 that can be carried by a vehicle user
4 is each of the transmitters 2L, 2 installed in the vehicle V
The reply data is transmitted to the vehicle-side receiver 4 in response to receiving the request signal of the regular code from one of R and 3.

The operation of the door lock means 6, the steering lock means 10 and the engine start control means 12 is as follows.
It is controlled by the electronic control unit 15 mounted on the vehicle V, and the transmission from each of the transmitters 2L, 2R, 3 is also controlled by the electronic control unit 15, and the electronic control unit 15 has the switching intention. The detection results of the detection means 7L and 7R and the reception result of the vehicle-side receiver 4 are input.

When the electronic control unit 15 detects the switching intention of the vehicle user by one of the switching intention detecting means 7L, 7R on both the left and right sides, the vehicle external transmitter 2 is detected.
Of the L and 2R, the vehicle-side external transmitter on the side where the switching-intention detecting means for detecting the switching intention is arranged transmits a regular code request signal, and the remaining vehicle-side external transmitter and vehicle-side internal transmitter. 3 outputs a signal that prevents the mobile user from carrying or replying to the request signal by a mobile transmitter / receiver other than the mobile transmitter / receiver 14 carried by the vehicle user. It controls transmissions from the external transmitters 2L and 2R and the vehicle-side internal transmitter 3. As a result, communication is performed between the mobile transmitter / receiver 14 and any one of the vehicle-side external transmitters 2L and 2R and the vehicle-side internal transmitter 3, and the vehicle-side receiver 4.

By the way, a plurality of portable transmitters / receivers 14 are prepared for the same vehicle, and one of the vehicle-side external transmitters 2L and 2R and the vehicle-side internal transmitter 3 is provided.
If there are a plurality of portable transmitters / receivers 14 ... Corresponding to the same vehicle within a range where communication with the vehicle-side receiver 4 is possible, specify those portable transmitters / receivers. If a request signal is transmitted from any one of the vehicle-side external transmitters 2L and 2R and the vehicle-side internal transmitter 3 without reply, reply data is simultaneously transmitted from the plurality of portable transmitters / receivers 14 ... to the vehicle-side receiver 4. Therefore, the electronic control unit 15 on the vehicle side cannot read the data.

Therefore, one of the plurality of portable transmitter / receivers 14 ...
By selecting the anti-collision mode in which the request signal specifying one of the vehicle-side external transmitters 2L and 2R and the vehicle-side internal transmitter 3 is selected, interference is prevented from occurring, The data from the portable transmitter / receiver 14 can be surely read, but in order to identify each portable transmitter / receiver 14 ... In its anti-collision mode, each portable transmitter / receiver 14 ... A management number is attached to each mobile transmitter / receiver 14 ...
Trying to identify.

The electronic control unit 15 includes doors 5L and 5R.
In controlling the operation of the door lock means 6 so as to bring the vehicle into the unlocked state, the transmission of the request signal from one of the vehicle side external transmitters 2L and 2R is controlled according to the procedure shown in FIGS. Yes, in step S1, unlock switches 8L and 8R of switching intention detecting means 7L and 7R
In response to the turning on, in step S2, one of the vehicle-side external transmitters 2L and 2R transmits a request signal for a regular code. At this time, it is not known how many portable transmitters / receivers 14 ... Corresponding to the same vehicle exist within a range where communication with one of the vehicle side external transmitters 2L and 2R and the vehicle side receiver 4 is possible. Therefore, in step S2, a plurality of portable transmitter / receivers 1
Request signals for all 4 ... Are transmitted.

In the next step S3, the portable transmitter / receiver 1
It is judged whether or not the reply data from 4 has been read, and in the environment where there is no noise, one within the range in which communication with one of the vehicle side external transmitters 2L and 2R and the vehicle side receiver 4 is possible. If the portable transmitter / receiver 14 exists, the communication can be established because the reply data from the portable transmitter / receiver 14 can be read, and the process proceeds from step S3 to step S4 to manage the received portable transmitter / receiver 14. The number is stored, and the door lock means 6 is unlocked in step S5.

Such steps S2 to S5 are common in that a request signal for all of the plurality of portable transmitters / receivers 14 for the same vehicle is transmitted from one of the vehicle side external transmitters 2L, 2R. In the communication mode processing, only one of the plurality of portable transmitters / receivers 14 ... Can communicate with one of the vehicle side external transmitters 2L and 2R and the vehicle side receiver 4. The doors 5L and 5R are unlocked by being present in the door. If it is determined in step 3 that the reply data from the portable transmitter / receiver 14 cannot be read, the process proceeds to step S6, and a plurality of portable transmitter / receivers are transmitted.
It is determined whether or not the header code commonly included in the reply data from the receivers 14 can be recognized. When the header-code can be recognized, the electric field level received by the vehicle-side receiver 4 is equal to or higher than the set level in step S7. Or not.

When it is determined in S6 that the header code cannot be recognized, it is determined that the reply data from the portable transmitter / receiver 14 could not be read due to noise, and noise processing is executed in step S8. Further, although the header code can be recognized, when the electric field strength is below a certain level, the process proceeds to step S8 and the noise processing is executed.

When it is determined in step 7 that the header code can be recognized and the electric field strength is also above a certain level, the vehicle side external transmitters 2L, 2R are provided.
It is determined that there are a plurality of portable transmitters / receivers 14 ... Corresponding to the same vehicle within a range where communication with one of the two and the vehicle-side receiver 4 is possible, and the process proceeds to step S9 in FIG. The anti-collision mode in which a request signal specifying one of the portable transmitters / receivers 14 ... Is transmitted from one of the vehicle side external transmitters 2L and 2R.

That is, a common communication mode in which a request signal for all of a plurality of portable transmitters / receivers 14 ... For the same vehicle is transmitted from one of the vehicle side external transmitters 2L, 2R, and a plurality of portable transmitters / receivers are used. -The anti-collision mode in which a request signal specifying one of the receivers 14 ... Is transmitted from one of the vehicle side external transmitters 2L and 2R can be switched, and the data received by the vehicle side receiver 4 cannot be read. When all of the following are satisfied, that the header code is recognized, and that the electric field level is above a certain level, the common communication mode is switched to the anti-collision mode.

In step S9 of FIG. 3, the management number of the portable transmitter / receiver 14 when the communication with one of the vehicle-side external transmitters 2L and 2R was established last time is designated. A request signal specifying the portable transmitter / receiver 14 is transmitted from one of the vehicle side external transmitters 2L, 2R.

In the next step S11, it is determined whether or not the reply data from the portable transmitter / receiver 14 has been read, and the portable transmitter / receiver 14 having the specified management number is one of the vehicle side external transmitters 2L, 2R. When there is communication with the vehicle-side receiver 4, the portable transmitter / receiver 1
Since the reply data from 4 can be read, the communication is established, the process proceeds from step S11 to step S12 to unlock the door locking means 6, and in step S13, the management number of the portable transmitter / receiver 14 with which communication is performed is stored.

In step S11, when the reply data from the portable transmitter / receiver 14 cannot be read, a plurality of portable transmitter / receivers 14 for the same vehicle are ...
It is determined whether or not the management number has been designated, and if the designation is not completed, the portable transmitter / receiver 14 is determined in step S15.
The control number is changed and designated, and the process returns to step S10.
That is, a plurality of portable transmitters / receivers 1 for the same vehicle
Since the control numbers of 4 ... are known in advance, the control number is changed and one of the vehicle side external transmitters 2L and 2R transmits the request signal until the communication is established.

In such an anti-collision mode,
The communication number with one of the vehicle-side external transmitters 2L and 2R is established last time, the control number of the portable transmitter / receiver 14 is specified with priority, and the doors 5L and 5R are unlocked according to the establishment of the communication. Mobile transmitter / receiver 1 with which communication was established with
The management number of 4 will be stored.

Next, the operation of this embodiment will be described. A plurality of portable transmitter / receivers 14 for the same vehicle are ...
Of the mobile transmitters / receivers 14 ... and individual request signals for each mobile transmitter / receiver 14 can be transmitted from one of the vehicle side external transmitters 2L, 2R, and one of the vehicle side external transmitters 2L, 2R and the vehicle. Each time the communication between the side receiver 4 and the portable transmitter / receiver 14 is established, the portable transmitter / receiver 14 as the communication target is stored, and a plurality of portable transmitters / receivers for the same vehicle are stored.・ Receiver 14 ... is the vehicle side external transmitter 2L, 2R
One of the portable transmitters / receivers 14 ... Is specified as a communication target in a state where the portable transmitter / receiver 14 ...
When transmitting from one of the Rs, the portable transmitter / receiver 14 that was the communication target when the previous communication was established is specified with priority.

By the way, when there are a plurality of portable transmitters / receivers 14 ... Which are intended for the same vehicle in a range in which one of the vehicle side external transmitters 2L and 2R and the vehicle side receiver 4 can communicate, When the doors 5L and 5R of the vehicle are unlocked, the portable transmitter / receiver 14 that has established communication with one of the vehicle-side external transmitters 2L and 2R and the vehicle-side receiver 4 is the portable transmitter / receiver 14 ... There is a high possibility that it is one of Therefore, when the one mobile transmitter / receiver 14 is specified as the communication target, the mobile transmitter / receiver 14 which is the communication target when the previous communication is established is preferentially specified. , 2R, and the vehicle-side receiver 4 and the portable transmitter / receiver 14 can be quickly established to improve responsiveness.

Further, each mobile transmitter / receiver 14 is individually assigned a management number, and each mobile transmitter / receiver 14 is identified by the management number, so that a plurality of mobile transmitters / receivers 14 ...
The communication time required to identify one of the receivers 14 ... Can be shortened and the responsiveness can be further improved.

That is, in identifying a plurality of portable transmitters / receivers 14, ... I specific to each portable transmitter / receiver 14 ...
It is possible to simply add D, but in order to minimize the possibility that there is a portable transmitter / receiver 14 with the same ID in the vicinity of the same vehicle, an ID unique to the portable transmitter / receiver 14 is used. It is necessary to set as many as the number of vehicles produced, and if communication is performed by specifying such many types of IDs, the communication time becomes long. On the other hand, the communication time of the management number required to identify at most 3 to 4 portable transmitters / receivers 14 for the same vehicle is very short, and the communication time is shortened. The responsiveness can be further enhanced.

In addition, a plurality of mobile phones for the same vehicle
A common communication mode in which a request signal for all of the receivers 14 ... Is transmitted from one of the vehicle-side external transmitters 2L, 2R, and a request signal specifying one of the plurality of portable transmitter / receivers 14 ... The anti-collision mode transmitted from one of the side external transmitters 2L and 2R can be switched, and the fact that the data received by the vehicle-side receiver 4 cannot be read is transferred from the common communication mode to the anti-collision mode. Is one of the conditions. That is, when a plurality of portable transmitters / receivers 14 ... For the same vehicle exist in a communicable range, a request signal for all portable transmitters / receivers 14 ... Is transmitted to the vehicle side external transmitter 2L, If it is transmitted from one of the 2Rs, the data received by the vehicle side receiver 4 should be unreadable due to interference of reply data. Therefore, it is necessary to at least confirm that the data cannot be read.
One condition is to switch from common communication mode to anti-collision mode so that multiple mobile
The anti-collision mode is set when there is a possibility that the receivers 14 are present. In the other normal states, one of the vehicle-side external transmitters 2L and 2R sends a request signal for all portable transmitters / receivers. By setting the common communication mode in which the doors 5L and 5R are transmitted, the communication with the specified one portable transmitter / receiver 14 can be immediately established, and the doors 5L and 5R can be unlocked with good responsiveness.

Recognizing a header code that is commonly included in reply data from a plurality of portable transmitters / receivers 14 ... Is another judgment condition when shifting from the common communication mode to the anti-collision mode, and noise of noise is detected. It is possible to shift from the common communication mode to the anti-collision mode, except when the data received by the vehicle-side receiver 4 cannot be read due to the influence.

Further, the fact that the electric field level received by the vehicle-side receiver 4 is at or above the set level is set as another determination condition when shifting from the common communication mode to the anti-collision mode, so that the vehicle side is affected by noise. It is possible to shift from the common communication mode to the anti-collision mode except when the data received by the receiver 4 cannot be read. That is, when a plurality of portable transmitters / receivers 14 ... Targeting the same vehicle exist in a communicable range, the electric field strength should be high, and the common communication mode can be switched to the anti-collision mode.

Moreover, even if a plurality of portable transmitters / receivers 14 ... Targeting the same vehicle are not present in the communicable range, the electric field strength is high in the area of strong electric field. In addition, by adding to the judgment condition that the electric field strength is equal to or higher than the set level, it is possible to surely prevent the accidental transition to the anti-collision mode from occurring due to the existence of the strong electric field area. You can

In the above embodiment, in order to unlock the doors 5L and 5R, the portable transmitter / receiver 14 outside the vehicle compartment 1, one of the vehicle side external transmitters 2L and 2R, and the vehicle side receiver. 4 has been described in connection with the communication performed with the vehicle 4, but also with respect to the communication performed between the portable transmitter / receiver 14 in the passenger compartment 1 and the vehicle-side internal transmitter 3 and the vehicle-side receiver 4. The common communication mode and the anti-collision mode may be switched in the same manner as described above.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the present invention described in the claims. It is possible.

[0040]

As described above, according to the first aspect of the present invention, when specifying one portable transmitter / receiver as a communication target, the portable transmitter / receiver that was the communication target when the last communication was established.
Since the receiver is specified with priority, communication between the vehicle-side transmitter / receiver and the portable transmitter / receiver can be quickly established, and responsiveness can be improved.

According to the second aspect of the present invention, it is possible to shorten the communication time required to identify one of the plurality of portable transmitters / receivers and further improve the responsiveness.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a vehicle-mounted device remote control device.

FIG. 2 is a flowchart showing a part of a transmission control procedure by an electronic control unit.

FIG. 3 is a flowchart showing the rest of the transmission control procedure by the electronic control unit.

[Explanation of symbols]

2L, 2R, 3 ... Vehicle-side transmitter 4 ... Vehicle-side receiver 6 ... Door lock means 10 as in-vehicle equipment locking means ... Steering lock means 12 as in-vehicle equipment locking means ... Engine start control means 14 as vehicle-mounted device lock means ... Portable transmitter / receiver V ... Vehicle

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masahiko Sueyoshi             Miyazaki Prefecture Miyazaki-gun Sadowara-machi Large character Shimonaka Wadayama             3700 Address Honda Lock Co., Ltd. (72) Inventor Tsutomu Kurita             Miyazaki Prefecture Miyazaki-gun Sadowara-machi Large character Shimonaka Wadayama             3700 Address Honda Lock Co., Ltd. (72) Inventor Kazuya Kano             Miyazaki Prefecture Miyazaki-gun Sadowara-machi Large character Shimonaka Wadayama             3700 Address Honda Lock Co., Ltd. (72) Inventor Yu Asakura             1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture             Inside Honda Research Laboratory (72) Inventor Akira Uekura             1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture             Inside Honda Research Laboratory (72) Inventor Kentaro Yoshimura             1-4-1 Chuo Stock Market, Wako City, Saitama Prefecture             Inside Honda Research Laboratory F-term (reference) 2E250 AA21 BB08 BB41 CC16 DD06                       FF27 FF36 HH01 JJ03 KK03                       LL01 LL18 TT03                 5K048 AA08 BA42 BA52 DB01 DC01                       EA21 EB02 EB03 HA04 HA06

Claims (2)

[Claims] 1. A vehicle-side transmitter (2L, 2R, 3) arranged in a vehicle (V), a vehicle-side receiver (4) arranged in a vehicle (V), and a vehicle-side transmitter ( 2L, 2R, 3) a mobile transmitter / receiver (14) that sends reply data in response to receiving a request signal of a regular code sent by 2L, 2R, 3) and an in-vehicle device lock that switches between locked and unlocked states of the in-vehicle device Means (6, 10, 12), and the in-vehicle device locking means (6, 1) in response to the vehicle-side receiver (4) receiving reply data from the portable transmitter / receiver (14).
0, 12) in the on-vehicle equipment remote control device for switching operation, a plurality of portable transmitters / receivers (14) for the same vehicle are discriminated from each other and individual portable transmitters / receivers (14) are individually identified. The request signal can be transmitted from the vehicle-side transmitters (2L, 2R, 3), and the vehicle-side transmitters (2L, 2L) can be transmitted.
R, 3) and receiver (4) and portable transmitter / receiver (14)
Each time a communication is established with the mobile transmission / reception device (14) that is the communication target, a plurality of mobile transmission / reception devices (14) targeted for the same vehicle are stored on the vehicle side. A request signal that specifies one of the portable transmitter / receiver (14) as a communication target in a state where the transmitter (2L, 2R, 3) and the receiver (4) exist within a range in which communication can be performed with the vehicle (2). When transmitting from the transmitters (2L, 2R, 3), the portable transmitter / receiver (1
A method for identifying a portable transmitter / receiver in a remote control device for an in-vehicle device, characterized in that 4) is specified with priority. 2. The mobile transmitter / receiver (14) is individually assigned a management number, and each mobile transmitter / receiver (14) is identified by the management number. A method for identifying a portable transmitter / receiver in the remote control device for an in-vehicle device as described.