JP2005354312A - Hands-free device and vehicle wireless speech system employing same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide technology of automatically specifying the location of a mobile phone in a vehicle interior by having only to arrange one near distance wireless communication unit and performing switching to one of a hands-free speech and a handset speech depending on the location of the mobile phone in a hands-free speech system for the mobile phone. <P>SOLUTION: A hands-free device 300 is provided with a Bluetooth communication section 50 including wireless antennas 60 (directive antennas 61, 62, 63, and 64) separately located on seat positions and switched, when the hands-free device searches the location of the mobile phone 200, the hands-free device sequentially switches the directive antennas and tries communication with the mobile phone 200, and specifies that the mobile phone 200 is located in a region corresponding to the directive antenna for best sensing the signal from the mobile phone 200, and when the hands-free device detects the mobile phone on the driver's seat, setting is automatically made to the hands-free speech. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a radio communication system for a vehicle and a hands-free device in which a mobile phone and a hands-free device are connected by short-range wireless communication means.

In recent years, regarding a hands-free call system for mobile phones brought into the passenger compartment, a mobile phone is not directly connected to a hands-free device, but a wireless communication line is established between them using a short-range wireless communication means such as Bluetooth communication. A system that realizes hands-free calling is known (Patent Document 1). The hands-free call system described in Patent Document 1 detects the position of a mobile phone, the position of a user's seat, and the running state of a vehicle by using various sensors such as a plurality of wireless sensors and a seating sensor. In other words, it restricts the functions of mobile phones. Thus, for example, even if the mobile phone was initially brought into the driver's seat and was restricted to hands-free calls only, if another occupant subsequently moved the mobile phone to make a call, The system is automatically switched to a normal handset call, making it a user-friendly system.
Japanese Patent Laid-Open No. 15-102058

  However, in the hands-free call system described in Patent Document 1, a wireless sensor or seating for specifying the position of the mobile phone in the vehicle compartment is provided separately from the short-range wireless communication device (Bluetooth communication device) for hands-free calling. Since the sensor is used, the system becomes complicated.

  The present invention has been made in view of such a problem, and is a simple and practical wireless communication system capable of specifying the position of a mobile phone in a vehicle interior only by arranging one short-range wireless communication device. And it aims at providing the hands-free apparatus which implement | achieves this system.

  The wireless communication system according to claim 1 includes a hands-free device provided in a vehicle and a mobile phone capable of making a hands-free call using the hands-free device, and the hands-free device is connected to the mobile phone. Wireless communication means for performing wireless communication, position specifying means for specifying the position of the mobile phone in the vehicle interior, and communication control means for switching the mobile phone call to a hands-free call or a handset call depending on the position of the mobile phone in the vehicle interior The position specifying means divides the communication range of the wireless communication means when searching for the position of the mobile phone, and specifies the position by trying to communicate with the mobile phone for each of the divided areas. It is a feature.

  As described above, in the wireless communication system according to the first aspect, the mobile phone and the hands-free device are connected by wireless communication to realize the hands-free call. It is also used to identify the location of indoor mobile phones. When specifying the position of the mobile phone, the wireless communication means divides the communication range in the vehicle compartment (for example, for each seat), and tries to communicate with the mobile phone for each divided communication range. The position of the mobile phone can be specified from the intensity of the range. Then, depending on the position of the mobile phone, it is possible to make the mobile phone only hands-free or allow a normal handset call. As a result, for example, when a mobile phone is brought into the driver's seat, it can be detected automatically and only hands-free calls can be made without equipping multiple wireless sensors to identify the location of the mobile phone. Alternatively, a simple and practical wireless call system that allows a normal handset call when it is detected that it is brought into a seat other than the driver's seat can be realized.

  In the wireless communication system according to claim 2, after the position specifying unit specifies the position of the mobile phone, the position is determined by using the divided communication range corresponding to the position of the mobile phone. It is characterized in that communication is performed and communication with a cellular phone is attempted over the entire interior of the vehicle in each divided area, and it is confirmed whether the cellular phone is moving.

  As described above, in the wireless communication system according to the second aspect, after the position of the mobile phone brought into the vehicle interior is specified, the hands-free device is set in the divided communication range corresponding to the position of the mobile phone. It communicates only with the telephone and realizes hands-free calling. After that, in the same way as the method of identifying the position of the mobile phone for the first time, it tries to communicate with the mobile phone for the entire interior of the vehicle in each divided area and confirms whether the mobile phone has moved. . Thus, for example, even when a mobile phone is initially brought into the driver's seat and set for hands-free calling, if another occupant subsequently moves to use the mobile phone, By detecting and automatically canceling the hands-free call mode, a normal handset call can be made, and a user-friendly hands-free call system can be realized.

  Further, as means for dividing the communication range, in the wireless communication system according to claim 3, the wireless communication means includes a directional antenna in which sensitivity of a wireless signal from a certain direction is improved, The position specifying means specifies the position of the mobile phone by comparing the received signals from the plurality of directional antennas. Thus, for example, if antennas having directivity in the direction of each seat are arranged for each seat, it is possible to specify which seat the mobile phone has been brought in or moved.

  The wireless communication system according to claim 4 is characterized in that the wireless communication means performs wireless communication in accordance with a communication protocol based on the Bluetooth system, and the mobile phone supports the communication of the Bluetooth system. The Bluetooth (registered trademark, the following is omitted) method is a kind of wireless communication protocol, and has attracted attention in recent years because it can reduce the size and power consumption of a communication circuit. By using wireless communication based on the Bluetooth system, it is possible to reduce the size of a mobile phone or a hands-free device and reduce power consumption.

  In addition, when the hands-free device according to claim 5 detects a plurality of registration means for registering a unique identification number of the mobile phone in order to recognize the mobile phone, and a plurality of mobile phones in which the position specifying means are registered, Selecting means for selecting one mobile phone from among them and performing communication. As a result, even when a plurality of mobile phones are brought into the vehicle interior, the hands-free device identifies them, selects one mobile phone from among them, establishes a wireless communication line, and selects the selected Wireless communication only with mobile phones. As a selection method, an identification number of a specific mobile phone is registered in advance on the hands-free device side, and when the mobile phone is brought into the vehicle interior, a wireless communication line is automatically established with the mobile phone. For example, when a plurality of registered mobile phones are detected, a method of selecting a mobile phone with which the user performs wireless communication can be considered.

  Furthermore, in the wireless call system according to the sixth aspect, even when one mobile phone is selected once, it is possible to select another mobile phone and set it to hands-free. In order to select another mobile phone again, it is only necessary to disconnect the wireless communication line and search for the mobile phone again.

  In the radio communication system according to claim 7, the communication control means prohibits the handset call and restricts only to the hands-free call when the mobile phone selected by the position specifying means is detected in the driver's seat. It is characterized in that a handset call is permitted when it is detected in the seat of the person. As a result, when a mobile phone is detected at the position of the driver's seat, it is determined that the driver has the mobile phone and the mobile phone can be used only for hands-free calls. When it is detected, it can be determined that a passenger other than the driver has it, and a normal handset call can be made.

  The hands-free device according to claim 8 includes: a wireless communication unit that performs wireless communication with a mobile phone; a position specifying unit that specifies a position of the mobile phone in the vehicle interior; and a position of the mobile phone in the vehicle interior. A communication control means for switching a mobile phone call to a hands-free call or a handset call, and the position specifying means divides the communication range of the wireless communication means when searching for the position of the mobile phone, and for each of the divided areas The position is specified by trying to communicate with the mobile phone.

  Thus, the hands-free device according to claim 8 has wireless communication means for realizing hands-free communication by connecting with a mobile phone by wireless communication, and further, the wireless communication means is portable in the vehicle interior. It is also used to locate the phone. When specifying the position of the mobile phone, the wireless communication means divides the communication range in the vehicle compartment (for example, for each seat), and tries to communicate with the mobile phone for each divided communication range. The position of the mobile phone can be specified from the intensity of the range. Then, depending on the position of the mobile phone, it is possible to make the mobile phone only hands-free or allow a normal handset call. With this hands-free device, for example, when a mobile phone is brought into the driver's seat, it is automatically detected and hands-free without using multiple wireless sensors to identify the location of the mobile phone. It is possible to realize a simple and practical wireless call system in which a normal handset call is permitted when only a call can be made or when it is detected that the phone is brought into a seat other than the driver's seat.

  In the hands-free device according to claim 9, after the position specifying unit specifies the position of the mobile phone, the position specifying unit wirelessly uses the divided communication range corresponding to the position of the mobile phone with respect to the wireless communication unit. It is characterized in that communication is performed and communication with a cellular phone is attempted over the entire interior of the vehicle in each divided area, and it is confirmed whether the cellular phone is moving.

  As described above, in the hands-free device according to claim 9, after specifying the position of the mobile phone brought into the vehicle interior, the mobile phone only communicates with the mobile phone within the divided communication range corresponding to the position of the mobile phone. To achieve hands-free calling. After that, in the same way as the method of identifying the position of the mobile phone for the first time, it tries to communicate with the mobile phone for the entire interior of the vehicle in each divided area and confirms whether the mobile phone has moved. . Thus, for example, even when a mobile phone is initially brought into the driver's seat and set for hands-free calling, if another occupant subsequently moves to use the mobile phone, By detecting and automatically canceling the hands-free call mode, a normal handset call can be made, and a user-friendly hands-free call system can be realized.

  Further, as means for dividing the communication range, in the hands-free device according to claim 10, the wireless communication means includes a directional antenna in which the sensitivity of the wireless signal from a certain direction is improved, The position specifying means specifies the position of the mobile phone by comparing the received signals from the plurality of directional antennas. Thus, for example, if antennas having directivity in the direction of each seat are arranged for each seat, it is possible to specify which seat the mobile phone has been brought in or moved.

  The hands-free device according to claim 11 is characterized in that the wireless communication means performs wireless communication according to a communication protocol based on the Bluetooth method. The Bluetooth method is a kind of wireless communication protocol, and has attracted attention in recent years because it can reduce the size and power consumption of a communication circuit. By using wireless communication based on the Bluetooth method, the hands-free device can be downsized and power consumption can be suppressed.

  When the hands-free device according to claim 12 detects a plurality of mobile phones in which a registration means for registering a unique identification number of the mobile phone and a position specifying means are registered in order to recognize the mobile phone, Selecting means for selecting one mobile phone from among them and performing communication. As a result, even when a plurality of mobile phones are brought into the vehicle interior, the hands-free device identifies them, selects one mobile phone from among them, establishes a wireless communication line, and selects the selected Wireless communication only with mobile phones. As a selection method, an identification number of a specific mobile phone is registered in advance on the hands-free device side, and when the mobile phone is brought into the vehicle interior, a wireless communication line is automatically established with the mobile phone. For example, when a plurality of registered mobile phones are detected, a method of selecting a mobile phone with which the user performs wireless communication can be considered.

  Further, in the hands-free device according to the thirteenth aspect, even when one mobile phone is selected once, it is possible to select another mobile phone and set it to hands-free. In order to select another mobile phone again, it is only necessary to disconnect the wireless communication line and search for the mobile phone again.

  In the hands-free device according to claim 14, the communication control means prohibits the handset call and restricts only to the hands-free call when the mobile phone selected by the position specifying means is detected in the driver's seat. It is characterized in that a handset call is permitted when it is detected in the seat of the person. As a result, when a mobile phone is detected at the position of the driver's seat, it is determined that the driver has the mobile phone and the mobile phone can only be used for hands-free calls. When it is detected, it can be determined that a passenger other than the driver has it, and a normal handset call can be made.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing the overall configuration of a radio communication system of a mobile phone and a hands-free device according to an embodiment of the present invention.

  First, the configuration of the mobile phone 200 will be described. The cellular phone 200 includes a wireless unit 10, a voice input unit 20, a Bluetooth communication unit 30, and a control unit 40. The wireless unit 10 includes a wireless antenna (not shown) and transmits / receives data (voice data) to / from another communication device (for example, a mobile phone) via a communication network. The voice input / output unit 20 is composed of, for example, a signal processing processor, acquires a voice signal of a voice spoken by the user from a microphone (not shown), and converts it into an electrical signal corresponding to the voice. In addition, an electrical signal corresponding to the voice of the other party that is received from the wireless unit 10 is restored to a voice and output to a speaker (not shown).

  The Bluetooth communication unit 30 performs wireless communication with the hands-free device 300 based on a Bluetooth communication system which is a kind of short-range communication system. The short-range wireless communication method is a communication method for wirelessly connecting terminal devices at a short distance of about 10 m, and simplification of wiring can be realized. In particular, the Bluetooth communication method has been attracting attention in recent years because it can reduce the size and power consumption of its communication unit. In addition to wireless connection between hands-free devices and mobile phones, laptop computers can be connected to each other. An example of connecting a notebook computer and a printer is also conceivable. The Bluetooth communication unit 30 includes a modulator, a demodulator, and the like. When the signal is transmitted to the handsfree device 300, the Bluetooth communication unit 30 converts the signal into a predetermined signal by the modulator and receives the signal from the handsfree device 300. The demodulator converts the signal into a predetermined signal.

  The wireless unit 10, the voice input / output unit 20, and the Bluetooth communication unit 30 are connected to a control unit 40. The control unit 40 includes a well-known CPU, ROM, and RAM. Switch 200 to handsfree and handset calls. That is, when the mobile phone 200 is set to a hands-free call, the voice data received from the wireless unit 10 is not output from a speaker (not shown) of the voice input / output unit 20 and is sent to the hands-free device 300 via the Bluetooth communication unit 30. Send. The voice input / output unit 20 disables voice input from a microphone (not shown), and transmits voice data transmitted from the hands-free device 300 to the Bluetooth communication unit 30 to the other party's mobile phone via the wireless unit 10.

  Next, the configuration of the hands-free device 300 will be described. The hands-free device 300 includes a control unit 70, a memory 110, an audio conversion unit 80, a microphone 90, a speaker 100, a Bluetooth communication unit 50, and a wireless antenna 60.

  The microphone 90 inputs voice to the hands-free device 300 when the mobile phone 200 is set for hands-free calling. Speaker 100 also outputs audio data from mobile phone 200 as audio when mobile phone 200 is set to a hands-free call. The microphone 90 and the speaker 100 are connected to an audio conversion unit 80. The audio conversion unit 80 includes, for example, a signal processing processor, and converts audio input from the microphone 90 into an electrical signal corresponding to the audio. In addition, the electrical signal corresponding to the voice transmitted from the mobile phone 200 is restored to the voice and output to the speaker 100.

  Similarly to the Bluetooth communication unit 30 of the mobile phone 200, the Bluetooth communication unit 50 modulates a signal to be transmitted to the mobile phone 200 into a predetermined radio signal and transmits it via the radio antenna 60, and conversely from the mobile phone 200. The transmitted radio signal is received by the radio antenna 60, and the received signal is demodulated into an original signal.

  The wireless antenna 60 is connected to the Bluetooth communication unit 50 and transmits a signal to the mobile phone 200 or receives a signal from the mobile phone 200. This radio antenna 60 is composed of four antennas having directivity that sense signals from a specific direction (directional antennas 61, 62, 63, 64), and each directional antenna is attached to each seat of the vehicle. Transmit and receive radio signals within the corresponding area. For example, as shown in FIG. 2, if this radio antenna 60 is arranged at the center of the vehicle, a radio area can be secured over the entire vehicle, so that the presence or absence of the mobile phone 200 in the vehicle interior can be checked and each directivity can be checked. By comparing the signal strength received by the antenna, it is possible to specify which seat the mobile phone 200 is in. In the example of the directional antenna 60 shown in FIG. 2, the directional antenna 60 is installed at the center of the vehicle. However, as long as the wireless area can be covered with respect to the entire vehicle interior and can be divided into communication areas corresponding to the seats. The radio antenna 60 may be installed anywhere (for example, each directional antenna is installed directly above each seat), and the number of directional antennas may be changed depending on the size of the vehicle and the number of seats. .

  The control unit 70 includes a well-known CPU, RAM, ROM, and the like, searches for the position of the mobile phone 200, and sets and cancels a hands-free call according to the searched position of the mobile phone 200. When searching for the position of the mobile phone, the control unit 70 transmits a calling signal to the mobile phone 200 using the Bluetooth communication unit 50. If the mobile phone 200 is in the passenger compartment, the mobile phone 200 transmits a response signal to the hands-free device 300 when receiving the call signal. This response signal has a unique identification number of the mobile phone 200, and when the control unit 70 receives the response signal from the Bluetooth communication unit 50, it can recognize that the mobile phone 200 is in the vicinity. At this time, for each directional antenna (directional antennas 61, 62, 63, 64), the above-described ringing signal transmission and response signal reception are performed, and the strength of each received signal is compared to determine which seat the mobile phone 200 has. Can be identified. After recognizing the mobile phone 200 by the above-described method, when the mobile phone 200 and the wireless line are connected, the control unit 70 transmits a connection request signal to the mobile phone 200 using the Bluetooth communication unit 50. At this time, since the control unit 70 can recognize the position of the mobile phone 200, the control unit 70 transmits the connection request signal described above from the directional antenna corresponding to the position. When the mobile phone 200 receives this connection request signal, the mobile phone 200 transmits a connection response signal to the handsfree device 300. When the mobile phone 200 receives this connection response signal from the Bluetooth communication unit 50, the mobile phone 200 communicates with the mobile phone 200. Establish a wireless communication line between them. Thereafter, the hands-free device 300 performs one-to-one wireless communication with the mobile phone 200. Even when a wireless line is in a connected state between the hands-free device 300 and the mobile phone 200, when wireless communication is not actually performed (standby state) in order to reduce power for maintaining the connection. Low power consumption mode is set.

  When the mobile phone 200 is set to a hands-free call, the control unit 70 transmits the control signal to the mobile phone 200 using the Bluetooth communication unit 50. When receiving the control signal, the control unit 40 of the mobile phone 200 sets the mobile phone 200 to the hands-free call as described above. When the mobile phone 200 is set to a hands-free call, the control unit 70 of the hands-free device 300 converts the audio signal sent from the mobile phone 200 into audio by the audio conversion unit 80 and outputs it to the speaker 100. . The voice spoken from here is input to the hands-free device 300 through the microphone 90, and the control unit 70 converts it into a predetermined electric signal and transmits it to the mobile phone 200 using the Bluetooth communication unit 50.

  The identification number of the mobile phone 200 is registered in the memory 110 in advance. As a registration method, for example, the identification number of the mobile phone 200 is directly input to the hands-free device 300 for registration. In addition, an electronic card in which the identification number of the mobile phone 200 is incorporated may be attached to the hands-free device, and the hands-free device may read and register the identification number of the mobile phone 200 from the card. Thus, for example, even when another mobile phone having a Bluetooth communication unit is brought into the passenger compartment, the control unit 70 refers to the memory 110 to recognize the position of the mobile phone 200 to be set for a hands-free call. The mobile phone 200 can be automatically connected to the wireless communication line. Also, when a plurality of mobile phones are registered and a plurality of registered mobile phones are detected, the user selects one of the mobile phones and sets it as a hands-free call.

  The operation of the hands-free call system in the present embodiment will be described below using the flowchart of FIG. First, in step S10, the position of the mobile phone is searched. Here, when the power of the hands-free device 300 is turned on, the search is automatically started or started in conjunction with the engine start, or the hands-free device 300 has a search start switch and the user presses it to start the search. You may let them. As for the search method, as described above, the position is specified by attempting communication with the mobile phone 200 for each directional antenna. If the mobile phone 200 is not detected in step S20, it is determined that the mobile phone to be set for the hands-free call has not been brought into the vehicle compartment. On the other hand, when the mobile phone 200 is detected, the process proceeds to step S30.

  In step S30, a Bluetooth connection is performed between the mobile phone 200 and the hands-free device 300. Thereafter, the hands-free device 300 uses a directional antenna corresponding to the position of the mobile phone 200 in order to perform one-to-one communication with the mobile phone 200. When the mobile phone 200 having the Bluetooth communication function is brought into a plurality of passenger compartments, one mobile phone 200 is selected and connected as described above. As a selection method, for example, notification that a plurality of mobile phones has been detected is made via a speaker or the like, and an instruction is given to turn off the power of mobile phones that are not selected. As a result, the hands-free device 300 can recognize that the mobile phone that has been continuously powered on has been selected. In addition, a display unit and a touch switch may be provided in the hands-free device 300, and the detected telephone number of the mobile phone may be displayed so that the selection can be performed by touch switch operation.

  In step S40, it is determined whether or not the mobile phone 200 connected in Bluetooth in step S30 is in the driver's seat. As described above, the determination is made by comparing the strengths of the received signals to the directional antennas 61, 62, 63, 64. When it is determined that the mobile phone 200 is not in the driver's seat (determination determination), the process proceeds to step S60 to enable use of either a normal handset call or a hands-free call. Here, as a method of selecting whether to make a call with a handset or hands-free, for example, when calling from the mobile phone 200 from here, the mobile phone 200 can be used as usual, and the mobile phone 200 is called. The hands-free device 300 is provided with a display unit, a hands-free start switch, etc., and an incoming call to the mobile phone 200 is notified on the display unit. When the hands-free start switch is pressed, a hands-free call is made. When a call start switch or the like provided in 200 is pressed, a call is made with the handset. In addition, for example, when the hands-free device 300 is provided with a display unit and a hands-free handset selection switch, and a mobile phone is detected in a place other than the driver's seat in step S40, the display unit or the speaker informs that effect and hands-free handset. The user may be prompted to select one of the calls and may be restricted to the call mode selected by operating the selection switch.

  Thereby, for example, even when an occupant other than the driver brings the mobile phone 200, the occupant can use the mobile phone 200 as usual. In addition, even when the mobile phone 200 is detected in a place other than the driver's seat, it is possible to make a hands-free call. For example, when there is no other occupant, the driver places the mobile phone 200 in the passenger seat and operates. You can talk hands-free even when you do. On the other hand, if it is determined in step S40 that the mobile phone 200 is in the driver's seat (positive determination), the process proceeds to step S50.

  In step S50, it is determined whether or not the vehicle is traveling. As a determination method, it can be considered that the vehicle is running by starting the engine, or a method of actually detecting the vehicle speed sensor for determination. Here, when it is determined that the vehicle is not traveling (negative determination), the process proceeds to step S60, and either a normal handset call or a hands-free call can be used. How to choose at either call a method of selecting whether to call in the same manner as described above the incoming user either per mode to the mobile phone 200 may select whether to call on either advance mode . Thus, even when the mobile phone 200 is brought into the driver's seat, a normal handset call can be performed when the vehicle is not moving. In addition, even when the vehicle is not moving, you can dare to talk hands-free.For example, even if the call comes in when the vehicle is temporarily stopped waiting for traffic lights at the intersection, You can talk for free. On the other hand, when it is determined in step S50 that the vehicle is traveling (positive determination), the process proceeds to step S70, and the control unit 70 and the control unit 40 allow the mobile phone 200 to make a call only hands-free.

  In step S80, it is determined whether or not the position of the mobile phone 200 is to be searched again. As a timing for the most search, a timer is set to automatically perform a re-search periodically, or a search start switch or the like is provided in the hands-free device 300, and the user performs a re-search by pressing this switch. Also good. Here, when the maximum search is not performed (negative determination), the process returns to step S40 to determine whether or not the mobile phone 200 is in the driver's seat. In step S40, since the mobile phone 200 is not searched again, the location information of the mobile phone 200 searched previously is maintained. That is, when it is determined that the mobile phone 200 is in the driver's seat before, it is determined in step S40 that the mobile phone 200 is in the driver's seat (positive determination), and conversely, it is determined that it is not in the driver's seat before. When this is done, it is determined that the driver's seat is not present in step S40 (negative determination). As a result, once the mobile phone 200 is brought into a place other than the driver's seat and is set to be usable for both handset calls and hands-free calls, this state is maintained until the mobile phone 200 is searched again. On the other hand, even if the mobile phone 200 is brought into the driver's seat and is set as a hands-free call because the vehicle is running, when the vehicle is subsequently stopped, the call can be made with the handset by the process of step S60. It becomes.

  In step S80, when the position of the mobile phone 200 is searched again (positive determination), the process returns to step S10. For example, if a timer is set and periodic re-searching is performed, even when the mobile phone 200 is first brought into the driver's seat and set for a hands-free call (step S70), the other passengers thereafter When the position is moved to use the mobile phone 200, the handset call can be automatically made (step S60). In addition, when a mobile phone having a Bluetooth communication function is brought into a plurality of passenger compartments, even if one mobile phone is selected from the mobile phone and set for hands-free calling as described above, it is determined in step S80. By re-searching the mobile phone 200, another mobile phone 200 can be set again for a hands-free call.

  In the present embodiment, a wireless antenna 60 having a plurality of directional antennas 61, 62, 63, 64 is used to detect the position of the mobile phone 200, and each directional antenna is used when detecting the position of the mobile phone 200. However, as shown in FIG. 4, the position of the mobile phone 200 may be searched by rotating one directional antenna so that the directivity is directed in the direction of each seat. .

  In the present embodiment, the Bluetooth communication method is used as the wireless communication method between the mobile phone 200 and the hands-free device 300, but other methods such as infrared communication means may be used.

1 is a block diagram illustrating an overall configuration of a wireless communication system between a mobile phone 200 and a hands-free device 300 according to the present embodiment. It is a figure which shows the mounting example to the vehicle of the hands-free apparatus 300 and the radio | wireless antenna 60 (directional antenna 61, 62, 63, 64) concerning this embodiment. It is a flowchart which shows operation | movement of the hands-free telephone call system concerning this embodiment. It is a figure which shows the example of mounting to the vehicle of the hands-free apparatus 300 and the radio | wireless antenna 60 concerning this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 200 Cellular phone 10 Radio | wireless part 20 Audio | voice input / output part 30 Bluetooth communication part 40 Control part 300 Hands free apparatus 60 Radio antenna 61 Directional antenna 62 Directional antenna 63 Directional antenna 64 Directional antenna 50 Bluetooth communication part 70 Control part 80 Voice Switching unit 90 Microphone 100 Speaker 110 Memory

Claims (14)

A hands-free device installed in the vehicle;
A mobile phone capable of making a hands-free call using the hands-free device,
The hands-free device is
Wireless communication means for performing wireless communication with the mobile phone;
Position specifying means for specifying the position of the mobile phone in the vehicle interior;
Communication control means for switching the call of the mobile phone to a hands-free call or a handset call depending on the position of the mobile phone in the vehicle interior;
When searching for the position of the mobile phone, the position specifying unit divides a communication range of the wireless communication unit, and specifies a position by attempting communication with the mobile phone for each of the divided areas. A wireless communication system for vehicles.   The position specifying means, after specifying the position of the mobile phone, causes the wireless communication means to perform wireless communication using the divided communication range corresponding to the position of the mobile phone, and periodically 2. The vehicle radio call according to claim 1, wherein communication is attempted with the mobile phone over the entire vehicle interior for each of the divided areas to check whether the mobile phone is moving. system. The wireless communication means arranges a plurality of directional antennas with improved sensitivity of a wireless signal from a certain direction so as to cover the entire vehicle interior,
The radio communication system for a vehicle according to claim 1 or 2, wherein the position specifying means specifies the position of the mobile phone by comparing received signals from the plurality of directional antennas. The wireless communication means performs wireless communication according to a communication protocol based on the Bluetooth method,
The wireless communication system for a vehicle according to any one of claims 1 to 3, wherein the mobile phone is compatible with the Bluetooth communication. The hands-free device includes a registration unit that registers a unique identification number of the mobile phone in order to recognize the mobile phone;
5. The device according to claim 1, further comprising: a selecting unit configured to perform communication by selecting one mobile phone from among the registered mobile phones when the position specifying unit detects a plurality of the registered mobile phones. The vehicle radio communication system according to claim 1.   The vehicle radio communication system according to claim 5, wherein the selection unit is a case where the one mobile phone is selected, and then another mobile phone can be selected again.   The communication control means prohibits the handset call when the position specifying means detects the selected mobile phone in the driver's seat and restricts it to only hands-free calls, and detects it in a seat other than the driver's seat. The wireless communication system for a vehicle according to any one of claims 1 to 6, wherein a telephone call is permitted. Wireless communication means for performing wireless communication with a mobile phone;
Position specifying means for specifying the position of the mobile phone in the vehicle interior;
Communication control means for switching the call of the mobile phone to a hands-free call or a handset call depending on the position of the mobile phone in the vehicle interior;
When searching for the position of the mobile phone, the position specifying means divides a communication range of the wireless communication means, and specifies a position by trying communication with the mobile phone for each of the divided areas. Features a hands-free device.   The position specifying means, after specifying the position of the mobile phone, causes the wireless communication means to perform wireless communication using the divided communication range corresponding to the position of the mobile phone, and periodically 9. The hands-free device according to claim 8, wherein communication with the mobile phone is attempted over the entire vehicle interior for each of the divided areas to check whether the mobile phone is moving. The wireless communication means arranges a plurality of directional antennas with improved sensitivity of a wireless signal from a certain direction so as to cover the entire vehicle interior,
The hands-free device according to claim 8 or 9, wherein the position specifying means specifies the position of the mobile phone by comparing received signals from the plurality of directional antennas.   The hands-free device according to any one of claims 8 to 10, wherein the wireless communication unit performs wireless communication according to a communication protocol based on a Bluetooth method. Registration means for registering a unique identification number of the mobile phone in order to recognize the mobile phone;
12. The device according to claim 8, further comprising a selection unit configured to select one mobile phone from among the plurality of registered mobile phones when the position specifying unit detects the registered mobile phones. A hands-free device as described in 1.   The hands-free device according to claim 12, wherein the selection means is a case where the one mobile phone is selected, and then another mobile phone can be selected again.   The communication control means prohibits the handset call when the position specifying means detects the selected mobile phone in the driver's seat and restricts the call to hands-free call, and detects the handset call in a seat other than the driver's seat. The hands-free device according to any one of claims 8 to 13, wherein a call is permitted.

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