JP2005213815A - Communication device, mobile terminal, and communication control program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance usability and security without leading a user to misidentification. <P>SOLUTION: This communication device is equipped with first, second and third communication parts 3, 4 and 5 which can establish radio communication with a mobile terminal 2 in a prescribed communication area, a first communication instruction part 6, a second communication instruction part 7, a radio output control part 8, a radio intensity measuring part 9, a distance estimating part 10, and an operation performing part 11. On completion of a connection between a cellular phone 2 and the communication equipment near unlocking buttons b1, b2 and b3 which are pushed by the user, a connection between another communication device and the cellular phone 2 is established, and a distance from the cellular phone 2 is measured according to reception signal intensity in each of the communication devices. This enables the sure establishment of communication with the mobile terminal present near a communication means given instructions by the first communication instruction means. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a communication device provided with a plurality of communication means capable of wireless communication with a mobile terminal, a mobile terminal that performs wireless communication with a communication device having a plurality of communication means, and a communication control program for controlling the communication device. The present invention relates to a communication control program for controlling a mobile terminal.

  Recently, keyless systems that can open and close the doors of automobiles from a remote location without requiring unlocking with a physical key have become widespread (see Patent Documents 1 and 2). A general keyless system uses a weak radio wave of 300 MHz or less, executes an authentication protocol between the user's key device and the wireless authentication module in the lock device installed on the door, and succeeds in authentication. An unlocking or locking signal is transmitted from the wireless authentication module to the electronic lock. Weak radio base stations are stipulated in Article 6, Paragraph 1 of the Radio Law Enforcement Regulations, and do not require a radio station license, and can transmit radio waves within a range of about 10 m at about 300 MHz.

  In the most popular keyless system at present, the user's procedure is as follows: (1) Approaching the door (2) Searching for a key device stored in a pocket or bag (3) Taking out the key device (4) Press the button on the key device (5) Unlock.

  As described above, in the currently most popular type, communication is started when the user presses a button provided on the key device. In contrast, the lock device always tries to communicate with the key device. Normally, power saving is considered, and operation is performed at regular intervals to reduce the duty cycle. When a radio wave transmitted from the key device is received by the lock device, authentication is subsequently performed and unlocked.

  Here, when the key operation of the key device is not performed, since the radio wave is not transmitted from the key device, the life of the battery built in the key device (2-5 years in normal use) is extended. be able to. Therefore, the button operation is an operation necessary for extending the life of the battery, but conversely, this operation reduces the convenience for the user. For example, if the user is holding an umbrella or baggage with his pocketed hand, or if the user's hands are blocked by baggage, the user may take the umbrella or baggage back to unlock. , You have to put your luggage somewhere.

  In order to improve such convenience, a keyless system that eliminates the need for button operation of the key device has also been proposed. Until then, the keyless system required the user to search for the key device in his pocket and take it out, and the user had an umbrella or baggage in his pocket-side hand. In other cases, or when the user's hands are blocked by luggage, it was necessary to put an umbrella or luggage somewhere to unlock it. However, since the button operation becomes unnecessary, the user does not feel such inconvenience even when he / she has a baggage.

  This system is currently considered in two ways. One is that the authentication protocol is automatically established when the user with the key device uses the same weak radio wave as above and the key device and the lock device enter the mutual radio wave reachable range when the user approaches the door. The door lock is unlocked. The user does not need any operation, and the door is unlocked only when approaching. For security reasons, the wireless radio wave reach is reduced to about 1m, for example, so that it cannot be unlocked unless it approaches just before the door. The other is a type in which the user who has the same locking device approaches the door and when the user presses the unlocking instruction button installed near the door knob, the door side operates the communication function. At that time, if the key device exists within the wireless radio wave reachable range, the authentication protocol is established and unlocked. The user needs to operate the instruction button near the door knob, but by changing the button from the key side to the lock side, the troublesome operation of searching for and removing the key held in the pocket can be avoided, Also, considering that you reach your door knob at least to open the door after unlocking, it is easier for the user to know that the button is on the lock side. The wireless radio wave reachable range is set to be as short as about 1 m, for example, as in the previous type for security.

A common key method is generally used as an authentication encryption algorithm used in the authentication protocol of the keyless system described above. For example, authentication is performed using a state-of-the-art encryption algorithm such as AES and a key having a sufficiently long key length. If done, it is impossible to break the key in real time and unlock the door lock with the computing power of the existing computer, and it is said that it is safer than a normal physical key There are also features. Taking advantage of the security of the key encryption algorithm, a product has also been developed that uses a cryptographic algorithm to authenticate an automobile engine. This ignition key system, commonly referred to as an immobilizer, inserts a car key into the ignition keyhole and twists the key to a predetermined position, and a current signal flows between the keyhole and the key. The authentication protocol is executed between the authentication module and the immobilizer ECU directly connected to the engine ECU.
JP2003-165630 Japanese Patent Laid-Open No. 11-220766

  As described above, automobile keys have introduced various technologies in order to improve convenience and security. However, in the current keyless system, the user cannot open and close the lock without carrying a car key device. If the function as the key device can be incorporated and used in another device carried on a daily basis instead of a dedicated key device, the convenience for the user can be further improved.

  There are portable information terminals such as mobile phones and PDAs that users carry today. Mobile phones are those that can make calls with landlines and other mobile phones via a wireless base station installed by a mobile phone operator, and can access the Internet. There has been a movement to install wireless communication devices. This second wireless communication device has a radio wave coverage of very close proximity to about 100 m in principle, and enables communication with other terminals without going through a base station provided by a mobile phone carrier. is there.

  Bluetooth (TM), which uses the 2.4GHz band ISM band and its nearby frequencies and does not require a radio license like a weak power radio, is drawing attention. While the effective transmission distance range of the conventional wireless LAN is 100 m or more, Bluetooth uses less power because of its narrow transmission range, so it is suitable for information processing apparatuses such as mobile phones that have a limited battery. In recent years, portable information processing apparatuses (hereinafter simply referred to as portable information terminals) such as cellular phones and PDAs equipped with this Bluetooth communication means have begun to spread. Details of Bluetooth can be obtained from the Web site at http://www.bluetooth.org/.

  If the Bluetooth or other wireless communication device installed in the portable information terminal is used as a keyless system to open / close doors of automobiles, start engine ignition, etc., it will not be necessary to carry a dedicated key device for the automobile. Thus, convenience for the user is improved. However, the main purpose of the wireless communication device mounted on the portable information terminal is not to open / close the lock but to transmit information at a high transfer rate, and there are some problems in its application to a keyless system. Patent Document 1 lists these problems and describes an invention for solving them. Among them, a method is described in which the locking device determines the distance by measuring the wireless strength from the key device to limit the unlocking distance short.

  However, there is a problem with the method for determining the distance by the wireless intensity measurement. The GHz-band radio used in Bluetooth has a shorter wavelength than conventional low-power radio in the MHz band, and is more susceptible to obstruction by obstacles. In particular, Bluetooth 2.4GHz is easily affected by water because it matches the resonance frequency of water as it is also used in microwave ovens. In other words, the radio is easily shielded by water or water-containing objects. Specifically, for example, when a user puts a mobile phone in a back pocket, the radio signal is shielded by the user who is a human body containing a lot of moisture. In addition, when a mobile phone is put in a bag and the bag gets wet by rain or the like, it is greatly shielded. Due to the influence of such shielding, the lock device will erroneously recognize that the key device is far away, and the key will not be opened.

  As a method for solving these problems, there is a method in which a plurality of wireless devices (or antennas) are provided on the lock device side and the wireless strength is measured from a plurality of points. It is possible to cancel the shielding effect to some extent by measuring from a plurality of points and performing a predetermined calculation or case division with each measured value. In the case of automobiles, the normal driver's seat, passenger's seat, and trunk are equipped with locks. For example, three radios of the lock device attached to them operate simultaneously to perform positioning of one mobile phone. Can be considered.

  Several inventions have been devised as an example of positioning a mobile phone mainly from a plurality of mobile phone base stations as disclosed in Patent Document 2, for example, as a system for positioning a counter radio device from a plurality of radio devices. . However, these are basically based on the assumption that the base station always operates and performs mobile phone positioning.

  When applied to a key-free system, the lock device may be battery-driven as in the case of an automobile, so power saving must be considered. In this case, for example, as described above, a method of starting the operation by pressing a button attached near the door by the user can be considered. A button is provided in each of the driver's seat, passenger seat and trunk corresponding to the lock. However, in that case, for example, if the radios of the three locking devices operate at the same time when the button is simply pressed, there is another user who has the mobile phone in addition to the user who pressed the button. When one user is located near the passenger seat, for example, the radio may react to the user's mobile phone on the passenger seat instead of the user's mobile phone on the driver's seat.

  Even if it can be determined by positioning that the position is the passenger's seat side and the driver's side door unlocked when the button is pressed cannot be unlocked, at least there is a user on the driver's seat side, so the determination is incorrect become. Also, for example, in this case, at least on the passenger seat side, the mobile phone can be detected, so even if the passenger seat side door is unlocked, the passenger seat side door opens even though the driver seat side button is pressed. The operation is difficult for the user to understand.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a communication device, a mobile terminal, and a communication control program capable of improving convenience and security without giving a false recognition to a user. It is to provide.

  In order to achieve the above object, the present invention provides a plurality of communication means capable of performing wireless communication with a mobile terminal in a predetermined communication area, and any one of the plurality of communication means. First communication instruction means for instructing start of wireless communication with the mobile terminal, and after any one communication means performs wireless communication with the mobile terminal according to an instruction from the first communication instruction means, The second communication instruction means that instructs the other communication means to start wireless communication with the mobile terminal from the one communication means, and the second communication instruction means is instructed to start wireless communication. The wireless output control means for changing the wireless communication power of the other communication means so that the communication area of the other communication means overlaps the communication area of any one of the communication means, and the first and second communication instruction means The signal strength measuring means for measuring the signal strength of the received signal from the mobile terminal received by the communication means, and the signal strength measured by the signal strength measuring means based on the signal strength measured from the mobile terminal. Distance estimation means for estimating a distance; and action execution means for determining whether or not to execute a predetermined action according to the distance estimated by the distance estimation means.

  In addition, the present invention provides a mobile terminal that performs wireless communication with a communication device having a plurality of communication means, wherein the plurality of communication means in one communication device are used as a set, and at least one set of each of the plurality of communication means. A storage means for storing identification information, a first wireless communication means for performing wireless communication with any one of the communication means, and a group to which any one of the communication means belongs after wireless communication by the first wireless communication means Before the wireless communication by the second wireless communication means for performing wireless communication with other communication means and the first wireless communication means, the first wireless communication means is set to a first state waiting for wireless communication by the first wireless communication means, and the first After the wireless communication by the first wireless communication means, the second state is set to wait for the wireless communication by the second wireless communication means, and when the wireless communication by the second wireless communication means is successful and by the second wireless communication means And a state management means for returning to the first state if it fails to communications.

  According to the present invention, when estimating the distance by measuring the radio strength of the mobile terminal from a plurality of communication means, only the communication means first instructed by the first communication instruction means is operated. Even when there are mobile terminals in the vicinity, it is possible to reliably communicate with mobile terminals existing in the vicinity of the communication means instructed by the first communication instruction means. Therefore, even if another mobile terminal exists in the vicinity, there is no risk of erroneous wireless communication with the mobile terminal, and convenience and security are improved.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram showing an internal configuration of a communication apparatus according to the first embodiment of the present invention. The communication device in FIG. 1 is mounted on a vehicle 1 as shown in FIG. 2, for example, and can perform wireless communication with a user who has a mobile terminal 2. The wireless communication method is not particularly limited, but an example in which wireless communication is performed mainly in accordance with the Bluetooth standard will be described below.

  The communication device of FIG. 1 includes first, second and third communication units 3, 4, 5, a first communication instruction unit 6, capable of performing wireless communication with a mobile terminal 2 within a predetermined communication area, A second communication instruction unit 7, a wireless output control unit 8, a wireless strength measurement unit 9, a distance estimation unit 10, and an operation execution unit 11 are provided.

  The mobile terminal 2 is a wireless communication device capable of wireless communication and carried by a user, for example, a mobile phone. As shown in FIG. 2, the first, second, and third communication units 3, 4, and 5 are installed on the driver seat side, the passenger seat side, and the rear trunk side of the vehicle 1, respectively. There are no particular restrictions on the number of communication units and installation locations, but the number of communication units is preferably two or more.

  The first communication instruction unit 6 instructs one of the first, second, and third communication units 3, 4, and 5 to start wireless communication with the mobile phone 2. Specifically, the first communication instruction unit 6 is unlock buttons b1, b2, and b3 that are installed near the first, second, and third communication units 3, 4, and 5, respectively. When the user presses any one of the unlock buttons b1, b2, and b3, the communication unit corresponding to the unlock button starts wireless communication with the mobile phone 2. Hereinafter, the communication unit that first performs wireless communication with the mobile phone 2 is referred to as the earliest communication unit. Hereinafter, an example in which the first communication unit 3 on the driver's seat side is the earliest communication unit will be described, but the second communication unit 4 or the third communication unit 5 may be the earliest communication unit.

  The second communication instruction unit 7 instructs the communication unit other than the earliest communication unit to start wireless communication with the cell phone 2 from the earliest communication unit after the earliest communication unit connects to the mobile phone 2. To do. The wireless output control unit 8 changes the communication area of the other communication unit so that the communication area of the other communication unit overlaps the communication area of the earliest communication unit. More specifically, the communication area is expanded by increasing the wireless communication power of other communication units.

  2 indicates the communication area of each communication unit before the second communication instruction unit 7 gives an instruction (hereinafter referred to as the first state), and the dotted line part in FIG. 3 indicates that the second communication instruction unit 7 gives an instruction. The communication area of each communication unit is shown after (hereinafter, in the second state). As can be seen from these figures, in the second state, the communication area of the other communication unit expands and overlaps the communication area of the earliest communication unit. Therefore, the other communication unit can perform wireless communication with the mobile phone 2 possessed by the user who pressed the unlock buttons b1, b2, and b3 corresponding to the earliest communication unit. The communication area in the first state is, for example, 1 m in diameter, and the communication area in the second state is, for example, 3 m in diameter.

  Returning to FIG. 1, the wireless strength measuring unit 9 measures the signal strength of the received signal from the mobile phone 2 received by the first, second, and third communication units 3, 4, and 5, respectively. Then, the distance estimation unit 10 estimates the distance from the mobile phone 2 based on the measured signal strength. The distance estimation unit 10 increases the distance measurement accuracy by performing so-called multipoint measurement refusal that estimates the distance from the mobile phone 2 based on the signal intensities measured at three locations.

  The communication device of FIG. 1 is actually realized by a driver seat side door lock device 21, a passenger seat side door lock device 22, and a rear trunk lock device 23, as shown in FIG. Each of the lock devices 21, 22, and 23 in FIG. 4 includes an unlock instruction button 24, an electronic lock 25, a control unit 26, a Bluetooth module 27, and an antenna 28. The Bluetooth module 27 corresponds to the first, second, and third communication units 3, 4, and 5 in FIG. Any one unlocking instruction button 24 pressed by the user corresponds to the first communication instruction unit 6 in FIG. 1, the electronic lock 25 corresponds to the operation execution unit 11 in FIG. 1, and the control unit 26 in FIG. 2 corresponds to the communication instruction unit 7, the wireless output control unit 8, the wireless intensity measurement unit 9, and the distance estimation unit 10. The antenna 28 of the Bluetooth module 27 is attached, for example, near the door knob of the vehicle 1.

  FIG. 5 is a block diagram showing a modification of FIG. In FIG. 4, the control unit 26 is provided for each of the driver side door locking device 21, the passenger side door locking device 22, and the rear trunk locking device 23, but the control unit 26 may be combined into one. The Bluetooth control unit 29 in FIG. 5 is an alternative to the control unit 26 in FIG. 4 and controls the Bluetooth module 27 of each lock device 21, 22, 23. By providing such a Bluetooth control unit 29, the overall configuration can be simplified, and component costs and power consumption can be reduced.

  FIG. 6 is a block diagram showing an example of the internal configuration of the mobile terminal possessed by the user. 6 includes a storage unit 31 that stores device addresses of a plurality of communication units installed in the vehicle 1 and its own device address, a communication unit 32 that performs wireless communication with the communication unit of the vehicle 1, A state management unit 33 that controls switching between the first and second states, and a connection control unit 34 that determines whether or not to perform connection based on whether or not the received device address is stored in the storage unit 31. Have.

  The memory | storage part 31 may memorize | store the device address about the some vehicle 1, and memorize | stores the device address of the some communication part 32 in each vehicle 1 as a group in that case. For example, the storage unit 31 has a capacity for storing device addresses (total 3 × 5 = 15) of up to five vehicles 1.

  The communication unit 32 performs wireless communication in the first state in which connection with the earliest communication unit corresponding to the button pressed by the user and second connection with other communication units after connection with the earliest communication unit. Wireless communication in the state is performed.

  The state management unit 33 controls the state transition between the first state and the second state. Specifically, when the connection with the earliest communication unit is completed, the state transits to the second state, the connection with all the communication units 32 in the same group is completed, or the connection with a part of the communication units 32 is established. When it fails, it changes to the first state.

  FIG. 7 is a flowchart illustrating an example of processing operation of the communication apparatus. First, it waits until the user presses any one of the unlock buttons b1, b2, and b3 (step S1). When performing wireless communication between Bluetooth devices, an identification information request is often made at all times, but this embodiment does not make an identification information request until the unlock buttons b1, b2, and b3 are pressed. Thereby, the power consumption of a communication apparatus can be suppressed.

  For example, when it is recognized that the unlock button b1 corresponding to the first communication unit 3 has been pressed (step S2), the first communication unit 3 (first communication unit) starts a connection waiting operation (step S3). . This operation is called an inquiry scan or page scan in the Bluetooth standard. More specifically, when the first communication unit 3 receives the identification information request from the mobile phone 2, it transmits its own device address to the mobile phone 2. The response of the device address to the mobile phone 2 is called an inquiry response.

  The first communication unit 3 performs an authentication process with the mobile phone 2 after performing a link connection with the mobile phone 2. Note that the authentication process may be omitted. Further, the authentication processing may be performed on both or one of the mobile phone 2 side and the vehicle 1 side.

  When the 1st communication part 3 has connected with the mobile telephone 2 (step S4), the 1st communication part 3 measures the radio signal strength of the received signal from the mobile telephone 2 (step S5).

  Next, the first communication unit 3 instructs the second communication unit 4 to start connection (step S6). In response to this instruction, the second communication unit 4 increases the wireless communication power to widen the communication area (step S7). The mobile phone 2 makes a connection request to the second communication unit 4 after completing the connection with the first communication unit 3. The device address of the second communication unit 4 can be specified from the already acquired device address of the first communication unit 3. When the second communication unit 4 is able to connect to the mobile phone 2 (step S8), the second communication unit 4 measures the radio signal strength of the received signal from the mobile phone 2 and uses the measurement result as the first communication. This is transmitted to the unit 3 (step S9).

  Similarly, the first communication unit 3 instructs the third communication unit 325 to start connection (step S10), and performs the same processing as steps S7 to S9 (steps S11 to S13).

  The wireless strength measuring unit 9 in the driver seat side door lock device 21 estimates the distance from the mobile phone 2 based on the measured wireless signal strength (step S14). If the estimated distance is within 1 m, the door is unlocked (step S15).

  FIG. 8 is a flowchart showing an example of processing operation of the mobile terminal. First, a device address acquisition trial operation of the communication apparatus is started (step S21). This operation may be performed all the time or intermittently (periodically). In the Bluetooth standard, this operation is called inquiry.

  Next, it is determined whether or not a device address has been acquired (step S22), and the processing of steps S21 and S22 is repeated periodically until it is acquired. When the device address is acquired, it is determined whether or not the device address is registered (step S23). If the device address is not registered, the processes of steps S21 to S23 are periodically repeated.

  If the acquired device address is registered, the communication device having the address (the earliest communication device) is connected (step S24). Thereafter, the device address is acquired again (step S25). It is determined whether or not the communication device having the acquired device address is the same vehicle 1 as the earliest communication device (step S26). If it is not the same vehicle 1, the process after step S21 is repeated, and if it is the same vehicle 1, it will connect with the communication apparatus with the device address acquired by step S25 (step S27). Note that steps S25 and S26 may be omitted, and the device addresses of the communication devices of the same vehicle 1 as the stored re-selection communication device may be sequentially drawn and connected.

  Next, it is determined whether or not the connection with all communication devices of the vehicle 1 having the earliest communication device has been completed (step S28), and if not completed, the processing after step S25 is repeated and completed. In that case, the processing from step S21 is repeated.

  As described above, in the first embodiment, when the connection between the communication device in the vicinity of the unlock buttons b1, b2, and b3 pressed by the user and the mobile phone 2 is completed, the connection between the other communication device and the mobile phone 2 is completed. Since the connection is made between them, it is possible to reliably communicate with the mobile phone existing in the vicinity of the unlock button pressed by the user. Therefore, communication with other users' mobile phones in the vicinity of other unlock buttons is not erroneously performed, and convenience and security are improved.

  In 1st Embodiment mentioned above, although the lock apparatus of the vehicle 1 side which performs radio | wireless communication with the mobile phone 2 first received the identification information (device address) request | requirement from the mobile phone 2, the example which responded was shown, The procedure for exchanging identification information is not limited to the above-described one. For example, the mobile phone 2 enters the identification information reception mode regularly or periodically, and when the user presses the unlock buttons b1, b2, b3, the locking device on the vehicle 1 side transmits the identification information to the mobile phone 2. Also good. Alternatively, a connection request may be made to the mobile phone 2 from the lock device on the vehicle 1 side. That is, when the user presses the unlock buttons b1, b2, and b3, the lock device on the vehicle 1 side requests identification information from the mobile phone 2, and the key device on the mobile phone 2 side always identifies from the lock device. In the mode for receiving the information request, when this request is received, the identification information is returned to the lock device on the vehicle 1 side, and the lock device receives it and connects to the key device on the mobile phone 2 side. But you can.

  Alternatively, when the key device on the mobile phone 2 side constantly transmits the identification information and the user presses the unlock buttons b1, b2, b3, the lock device on the vehicle 1 side may receive the identification information. In this case, instead of Bluetooth, another wireless method such as IEEE802.11b is adopted.

(Second Embodiment)
In the second embodiment, the earliest communication unit that first communicates with the mobile phone 2 transmits the device address of the mobile phone 2 to another communication unit.

  FIG. 9 is a block diagram showing an internal configuration of a communication apparatus according to the second embodiment of the present invention. The communication device of FIG. 9 includes an identification information transmission unit 12 for transmitting the device address of the mobile phone 2 to other communication units in addition to the configuration of the communication device of FIG.

  FIG. 10 is a flowchart illustrating an example of a processing procedure of the communication apparatus of FIG. Below, it demonstrates centering on a different part from the flowchart of FIG. When the user presses any one of the door unlock buttons b1, b2 and b3 (step S42), the first communication unit 3 in the vicinity of the unlock button b1 starts a device address acquisition trial operation of the mobile phone 2 ( Step S43).

  If the 1st communication part 3 acquires the device address of the mobile telephone 2, the 1st communication part 3 will connect with the mobile telephone 2 of the acquired address (step S44). Then, the first communication unit 3 measures the radio signal strength from the mobile phone 2 (step S45). Next, the first communication unit 3 instructs the second communication unit 4 to start connection with the mobile phone 2 having the acquired device address (step S46).

  When the second communication unit 4 is linked to the mobile phone 2, the wireless signal strength is measured (steps S 47 to S 49), and then the first communication unit 3 acquires the third communication unit 5. The start of connection with the mobile phone 2 having the device address is instructed (step S50). When the third communication unit 5 is able to establish a link connection with the mobile phone 2 (steps S51 and S52), the distance from the mobile phone 2 is estimated based on the measurement result of the radio signal strength, and whether or not the door is unlocked. Is determined (steps S53 to S55).

  As described above, in the second embodiment, the earliest communication unit that first communicated with the mobile phone 2 transmits the device address of the mobile phone 2 to another communication unit, and the other communication unit uses this device address. Reliable communication with the mobile phone 2 prevents other communication devices from being erroneously connected to a mobile phone other than the mobile phone with which the earliest communication unit communicates, and ensures that only the user's mobile phone 2 is connected. Since it can be performed, security is improved.

  In the second embodiment, the other communication unit having received the device address from the earliest communication unit has shown an example in which link connection is made with the mobile phone 2 having this device address, but without performing link connection, A signal from the mobile phone 2 may be simply received. When the mobile phone 2 transmits a signal, its own device address can be included in the signal. Therefore, if the other communication unit receives a signal from the mobile phone 2 without performing a link connection with the mobile phone 2, whether or not the signal is from the mobile phone 2 having the instructed device address. Can be judged.

(Third embodiment)
In the third embodiment, only the earliest communication unit that communicates with the mobile phone 2 first performs authentication processing with the mobile phone 2, and the other communication units omit the authentication processing.

  FIG. 11 is a block diagram showing an internal configuration of a communication apparatus according to the third embodiment of the present invention. The communication apparatus in FIG. 11 includes a selective authentication instruction unit 13 that controls whether or not to perform authentication processing in addition to the configuration in FIG.

  The selective authentication instruction unit 13 instructs the communication unit 32 (first communication unit) in the vicinity of the unlock buttons b1, b2, and b3 pressed by the user to perform authentication processing with the mobile phone 2. The communication unit is instructed not to perform authentication processing with the mobile phone 2.

  The earliest communication unit instructed to perform the authentication process from the selective authentication instruction unit 13 exchanges a key with the mobile phone 2 and performs the authentication process. If the authentication process is successful, the device address of the mobile phone 2 is transmitted to another communication unit, and a link connection with the mobile phone 2 is instructed. Since the authentication process by the earliest communication unit has already been completed, the selective authentication instruction unit 13 instructs other communication devices not to perform the authentication process. As a result, other communication devices perform link connection with the mobile phone 2 without performing authentication processing.

  As described above, in the third embodiment, since only the earliest communication unit performs the authentication process with the mobile phone 2, the distance to the mobile phone 2 can be estimated in a short time, and there is no possibility of waiting for the user. .

(Fourth embodiment)
In the fourth embodiment, when the link connection with the communication unit 32 of the vehicle 1 is not completed even after a predetermined time has elapsed since the user started wireless communication with the earliest communication unit, the door is unlocked. Is not allowed.

  FIG. 12 is a block diagram showing the internal configuration of the mobile phone 2 according to the fourth embodiment of the present invention. In addition to the configuration of FIG. 6, the mobile phone 2 of FIG. 12 includes a timer 35 that measures an elapsed time since the user started wireless communication with the earliest communication unit, and starts and stops measurement with respect to the timer 35. And a timer instruction unit 36 for instructing.

  FIG. 13 is a flowchart showing an example of the processing procedure of the mobile phone 2 of FIG. The flowchart of FIG. 13 is obtained by adding the process of step S28 in addition to the processes of steps S21 to S27 of FIG. If it is determined in step S27 that all the communication units 32 of the vehicle 1 are not yet connected, it is determined whether or not the measurement time of the timer 35 has passed 3 seconds (step S29). If 3 seconds have not elapsed, the process returns to step S25, and if 3 seconds have elapsed, the process returns to step S21. In addition, similarly to FIG. 8, steps S25 and S26 may be omitted, and the device address of the communication device of the same vehicle 1 as the stored re-selection communication device may be sequentially drawn and connected.

  Thus, in the fourth embodiment, wireless communication with all the communication units 32 of the vehicle 1 is completed even after a predetermined time has elapsed since the start of wireless communication with the earliest communication unit. If not, since the door is not unlocked, unauthorized unlocking can be reliably prevented.

  In each of the above-described embodiments, the communication device mounted on the vehicle 1 has been described, but the present invention can be applied to other than the vehicle 1. Moreover, although each embodiment mentioned above demonstrated the example which operation | movement execution apparatus unlocks a door, the kind of operation | movement which operation | movement execution apparatus performs is not specifically limited. For example, the present invention can be applied to opening / closing of the window of the vehicle 1, ignition control, side mirror control, and the like. Alternatively, as an example other than the vehicle 1, it can be applied to an automatic ticket gate.

  In the above-described embodiment, an example in which wireless communication is performed according to the Bluetooth standard has been described. However, the present invention may perform wireless communication according to another wireless method such as IEEE802.11b.

  At least a part of the communication device and the mobile terminal described in the above-described embodiment may be configured by hardware or software. When configured by software, a program for realizing at least a part of the functions of the communication device and the mobile terminal may be stored in a recording medium such as a floppy disk or a CD-ROM, and read and executed by a computer. The recording medium is not limited to a portable medium such as a magnetic disk or an optical disk, but may be a fixed recording medium such as a hard disk device or a memory.

  Further, a program for realizing at least a part of functions of the communication device and the mobile terminal may be distributed via a communication line (including wireless communication) such as the Internet. Further, the program may be distributed in a state where the program is encrypted, modulated or compressed, and stored in a recording medium via a wired line such as the Internet or a wireless line.

The block diagram which shows the internal structure of the communication apparatus which concerns on the 1st Embodiment of this invention. The figure which shows the communication area of each communication part. The figure which expanded the communication area of each communication part. The block diagram which shows an example of schematic structure of a communication apparatus. The block diagram which shows the modification of FIG. The block diagram which shows an example of the internal structure of the portable terminal which a user possesses. The flowchart which shows an example of the processing operation of a communication apparatus. The flowchart which shows an example of the processing operation of a portable terminal. The block diagram which shows the internal structure of the communication apparatus which concerns on the 2nd Embodiment of this invention. 10 is a flowchart illustrating an example of a processing procedure of the communication apparatus in FIG. 9. The block diagram which shows the internal structure of the communication apparatus which concerns on the 3rd Embodiment of this invention. The block diagram which shows the internal structure of the mobile telephone 2 which concerns on the 4th Embodiment of this invention. 13 is a flowchart showing an example of a processing procedure of the mobile phone 2 of FIG.

Explanation of symbols

3 1st communication part 4 2nd communication part 5 3rd communication part 6 1st communication instruction | indication part 7 2nd communication instruction | indication part 8 Wireless output control part 9 Wireless intensity | strength measurement part 10 Distance measurement part 11 Operation | movement execution part 12 Identification information transmission part 13 Selective Authentication Instruction Unit 21 Driver's Seat Side Door Locking Device 22 Passenger Seat Side Door Locking Device 23 Rear Trunk Locking Device 24 Unlocking Instruction Button 25 Electronic Lock 26 Control Unit 27 Bluetooth Module 28 Antenna 29 Bluetooth Control Unit 31 Storage Unit 32 Communication Unit 33 Status management unit 34 Connection control unit

Claims (12)

A plurality of communication means capable of performing wireless communication with a mobile terminal in a predetermined communication area;
First communication instruction means for instructing any one of the plurality of communication means to start wireless communication with the mobile terminal;
After any one communication means performs wireless communication with the mobile terminal according to an instruction from the first communication instruction means, the wireless communication with the mobile terminal from the any one communication means to another communication means. A second communication instruction means for instructing the start of communication;
Wireless that changes the wireless communication power of the other communication means so that the communication area of the other communication means instructed to start wireless communication by the second communication instruction means overlaps the communication area of any one of the communication means Output control means;
Signal strength measuring means for measuring the signal strength of the received signal from the mobile terminal received by the communication means received by the first and second communication instruction means;
Distance estimating means for estimating a distance from the mobile terminal based on the signal strength measured by the signal strength measuring means;
An operation execution unit that determines whether or not to execute a predetermined operation according to the distance estimated by the distance estimation unit. The identification information acquisition unit that receives the instruction from the first communication instruction unit, the identification unit acquiring the identification information of the mobile terminal,
Identification information transmission means for transmitting the acquired identification information of the mobile terminal from any one of the communication means to the other communication means,
The communication apparatus according to claim 1, wherein the signal strength measuring unit measures a signal strength of a received signal corresponding to the identification information transmitted by the identification information transmitting unit. The other communication means instructed by the second communication instruction means performs link connection with the mobile terminal having the identification information transmitted by the identification information transmission means,
The communication apparatus according to claim 2, wherein the signal strength measuring unit measures a signal strength of a received signal from the mobile terminal that has completed link connection.   The signal strength measuring unit measures the signal strength of a received signal including identification information transmitted by the identification information transmitting unit, regardless of whether or not a link connection with the mobile terminal is performed. 2. The communication device according to 2. An authentication unit that performs an authentication process only between any one of the plurality of communication units and the mobile terminal;
5. The second communication instruction unit according to claim 1, wherein when the authentication process by the authentication unit is successful, the second communication instruction unit instructs the other communication unit to start wireless communication with the mobile terminal. The communication apparatus in any one.   6. The first communication instruction unit, the second communication instruction unit, the wireless output control unit, and the signal strength measurement unit are provided corresponding to each of the plurality of communication units. The communication apparatus in any one of.   The wireless output control means includes a first state in which wireless communication power is set so that each of the plurality of communication means has a first communication area, and any one communication according to an instruction from the first communication instruction means. A second state in which wireless communication power is set so that each of the other communication means has a second communication area after the means performs wireless communication with the mobile terminal, and all of the other communication means 2. The wireless communication apparatus according to claim 1, wherein the first state is restored when wireless communication with the mobile terminal is performed or when at least one of the other communication units fails to perform wireless communication with the mobile terminal. The communication apparatus in any one of thru | or 6.   The communication apparatus according to claim 1, wherein the predetermined operation is an unlocking operation of a door. In a mobile terminal that performs wireless communication with a communication device having a plurality of communication means,
Storage means for storing identification information of each of at least one set of the plurality of communication means, with the plurality of communication means in one communication device as a set;
First wireless communication means for performing wireless communication with any one of the communication means;
Second wireless communication means for performing wireless communication with other communication means in the set to which any one of the communication means belongs after wireless communication by the first wireless communication means;
Before the wireless communication by the first wireless communication means, the first state is set to wait for wireless communication by the first wireless communication means, and after the wireless communication by the first wireless communication means, the wireless communication by the second wireless communication means. A state management unit that sets the second state to wait for the first state and returns to the first state when the wireless communication by the second wireless communication unit is successful and when the wireless communication by the second wireless communication unit fails. A mobile terminal comprising: A time measuring means for measuring the time from the time when wireless communication is performed by the first wireless communication means until the completion of wireless communication by the second wireless communication means;
The mobile terminal according to claim 9, wherein the state management unit sets the first state when the time measured by the time measurement unit exceeds a predetermined time. In a communication control program for a communication device including a plurality of communication means capable of performing wireless communication with a mobile terminal in a predetermined communication area,
Instructing any one of the plurality of communication means to start wireless communication with the mobile terminal;
Instructing the start of wireless communication with the mobile terminal from any one of the communication means to the other communication means after any one of the communication means performs wireless communication with the mobile terminal according to the instruction. When,
Changing the wireless communication power of the other communication means such that the communication area of the other communication means overlaps the communication area of any one of the communication means;
Measuring the signal strength of each received signal from the mobile terminal received by the plurality of communication means;
Estimating a distance from the mobile terminal based on the measured signal strength;
A communication control program causing a computer to execute whether or not to execute a predetermined operation according to the estimated distance. In a communication control program for a mobile terminal that performs wireless communication with a communication device having a plurality of communication means,
Storing at least one set of identification information of each of the plurality of communication means as a set of the plurality of communication means in one communication device;
Performing wireless communication with any one communication means;
Performing wireless communication with other communication means in the set to which any one of the communication means belongs after wireless communication by the first wireless communication means;
Before wireless communication with any one of the communication means, set to the first state, and after wireless communication with any one of the communication means, set to the second state to wait for wireless communication with the other communication means. And a step of causing a computer to execute the step of returning to the first state when the wireless communication with the other communication means is successful and when the wireless communication with the other communication means fails. Control program.

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