JP6577888B2 - Communication apparatus and communication system - Google Patents

Description

  The present invention relates to a communication apparatus that performs wireless communication and a communication system including the same, and more particularly to a communication apparatus that can establish a connection simultaneously with a plurality of communication partners.

  In communication by Bluetooth (registered trademark: hereinafter abbreviated as “BT”), connected devices exchange authentication information in advance by a procedure called pairing. Devices that have exchanged authentication information by pairing can then easily establish a connection without entering a password for authentication (see Patent Document 1). In Bluetooth Low Energy (hereinafter sometimes referred to as “BLE”), which is a Bluetooth standard formulated for low power consumption devices, once pairing is performed, the devices can be connected with each other without any user operation. It is possible to establish a connection automatically.

JP 2014-72755 A

  Wireless communication by BLE is applicable to a system that unlocks or locks a door of a vehicle using a portable device such as a smartphone. For example, a system in which a vehicle control device operates as a plurality of BLE slaves and a portable device operates as a BLE master is conceivable. In this system, a plurality of independent BT communication connections can be established between one portable device and a vehicle control device. As a result, even if some connections are lost due to radio wave interference or the like, communication between the portable device and the control device can be continued as long as other connections are maintained, so that the stability of communication is improved.

  However, in BLE, devices that have already been paired automatically establish a connection. Therefore, when a plurality of paired masters attempt to connect to slaves independently, there is a possibility that it may cause inconvenience to the operation of the system. . That is, if multiple portable devices are paired as masters to multiple slaves of a control device, after the connection between one slave and the master is lost, another master automatically connects to the one slave. There is a possibility that. If it does so, since it will be in the state where a plurality of portable devices were connected to the control device of vehicles independently, respectively, it will become possible to transmit an original control signal to a control device from a plurality of portable devices, respectively. In this case, there is a possibility that an inconsistent and inconsistent control signal may be transmitted from the two portable devices to the control device, and there is a disadvantage that the stability of the system is lowered.

  The present invention has been made in view of such circumstances, and an object of the present invention is to simultaneously connect with a plurality of different communication partners in a plurality of communication units capable of establishing a connection with the communication partner independently. An object of the present invention is to provide a communication device that can make an established state difficult to occur, and to provide a communication system including such a communication device.

The communication apparatus according to the first aspect of the present invention is capable of establishing a connection with a communication partner by wireless communication, and outputs identification information of the communication partner when a connection with the communication partner is established. If at least two communication units and a plurality of the identification information input from the plurality of communication units that have established a connection with the communication partner do not match, a connection is made from a plurality of communication partners corresponding to the plurality of identification information And a connection permission unit that determines identification information of one communication partner that permits the connection and notifies each communication unit of the identification information of the one communication partner that permits the connection. When the identification information notified from the connection permission unit is different from the identification information of the currently connected communication partner, the communication unit disconnects the connection with the communication partner.

  According to the above configuration, when connection with a plurality of communication partners is established in the plurality of communication units, one communication partner that permits connection is determined from the plurality of communication partners. In the communication unit connected to a communication partner different from the communication partner permitting this connection, the connection with the different communication partner is disconnected. Thereby, the state where connection with a plurality of communication partners is established in a plurality of the above-mentioned communication parts is canceled.

Preferably, the connection permission unit first inputs the identification information from one of the communication units after all the communication units have not yet established a connection with a communication partner. and was allowed to connect to the corresponding one of the communication counterpart identification information, and notifies the identification information of one communication party to allow the connection to each of said communication unit.

  According to the above configuration, after all of the communication units are in a state where connection with a communication partner has not been established, the communication with one communication partner corresponding to the identification information first input from the one communication unit Connection is allowed. Thereby, after the connection with the one communication partner is permitted, the connection permission unit is not permitted to connect with the other communication partner, so that it is difficult to frequently change the connection permission target.

  Preferably, when the connection with the communication partner is in an unestablished state, the communication unit permits connection with the communication partner corresponding to the identification information notified from the connection permission unit, and other identification information Connection control information indicating that the connection with the communication partner corresponding to is prohibited is transmitted to an unspecified communication partner.

  According to said structure, the said connection control information is transmitted toward the unspecified communication other party from the said communication part in the connection unestablished state. The connection control information indicates that connection with a communication partner corresponding to the identification information notified from the connection permission unit is permitted, and connection with a communication partner corresponding to other identification information is prohibited. As a result, the communication unit in the connection unestablished state can establish a connection with the communication partner permitted by the connection permission unit, and connect with a communication partner that is not permitted by the connection permission unit. Can be avoided.

Preferably, the connection permission unit, when the connection with the communication partner in all of the communication unit is in a state not established, notifies each said communication unit to allow the connection with any of the communication partner, wherein The communication unit permits connection with an arbitrary communication partner when the connection with the communication partner is in an unestablished state and is notified from the connection permission unit that connection with an arbitrary communication partner is permitted. sending towards said connection control information unspecified communication partner indicating that.

According to said structure, when the connection with a communication other party is in the unestablished state in all the said communication parts, it becomes possible to establish a connection with arbitrary communication partners in each said communication part.

  Preferably, when the communication unit performs Bluetooth communication with a communication partner and transmits the connection control information to an unspecified communication partner, the communication unit communicates an advertising packet including the connection control information. Send to the other party.

  According to the above configuration, even when the communication partner is operating as a master in Bluetooth communication, it is possible to transmit the connection control information at a desired timing from the communication unit operating as a slave.

A communication system according to a first aspect of the present invention includes a first communication device and a plurality of second communication devices each assigned identification information. Each of the first communication devices can establish a connection with the second communication device by wireless communication, and when the connection with the second communication device is established, identification information of the second communication device is provided. If the plurality of identification information input from the plurality of communication units that have established connections with the second communication device do not match at least two communication units to be output, a plurality of second information corresponding to the plurality of identification information from the communication device, and a connection permission unit for notifying to determine one of the second communication device to allow the connection, the identity of one of the second communication device to allow the connection to each of said communication unit. If the identification information notified from the connection permission unit is different from the identification information of the currently connected second communication device, the communication unit disconnects the connection with the second communication device.

  According to said structure, when the connection with several 2nd communication apparatus is established in the said some communication part, one 2nd communication apparatus which permits connection from the said some 2nd communication apparatus is the said. It is determined. In the communication unit connected to the second communication device different from the second communication device that permits the connection, the connection with the different second communication device is disconnected. Thereby, the state where the connection with the plurality of second communication devices is established in the plurality of communication units is canceled.

Preferably, the connection permission unit, when the connection with the second communication device is in an unestablished state in all the communication units, when the identification information is first input from one of the communication units, allow a connection to the first corresponding to the input identification information to one of said second communication device, the identification information of the connected one of said second communication device to allow notifies each said communication unit.

  According to the above configuration, after the connection with the second communication device has not been established in all the communication units, one second corresponding to the identification information first input from one communication unit. Connection with a communication device is permitted. Thereby, after the connection with the one second communication device is permitted, the connection permission unit is not permitted to connect with the other second communication device, so that the connection permission target is not easily changed. Become.

  Preferably, when the connection with the second communication device is in an unestablished state, the communication unit permits the connection with the second communication device corresponding to the identification information notified from the connection permission unit, And the connection control information which shows prohibiting the connection with the said 2nd communication apparatus corresponding to other identification information is transmitted toward the unspecified said 2nd communication apparatus. When the second communication device receives from the first communication device the connection control information indicating that the connection between the first communication device and the first communication device is permitted, the second communication device is involved in establishing a connection with the first communication device. When the connection control information indicating that the connection between the own device and the first communication device is prohibited is received from the first communication device, the establishment of the connection with the first communication device is postponed.

  According to said structure, the said connection control information is transmitted toward the said unspecified 2nd communication apparatus from the said communication part in the connection unestablished state. The connection control information permits connection with the second communication device corresponding to the identification information notified from the connection permission unit, and prohibits connection with the second communication device corresponding to other identification information. Indicates. When the connection permission information is received by the second communication device permitted by the connection permission unit, processing related to establishment of a connection with the first communication device is executed. On the other hand, in the second communication device other than the second communication device permitted to connect by the connection permission unit, when the connection control information is received, the process related to establishing the connection with the first communication device is not executed. Therefore, the communication unit in the connection unestablished state can establish a connection with the second communication device permitted by the connection permission unit, and the second communication device is not permitted by the connection permission unit. It becomes possible to avoid the connection with.

Preferably, the connection permission unit, if the connection between the second communication device in all of the communication unit is in a state not established, each of said communication to allow a connection with any of the second communication device Notify the department. When the communication unit is in a state where the connection with the second communication device has not been established, and when the connection permission unit is notified that the connection with the arbitrary second communication device is permitted, the connection control information indicating the permission of the connection between the second communication device transmits towards unspecified the second communication device. When the second communication device receives from the first communication device the connection control information indicating that a connection with any second communication device is permitted, the second communication device is involved in establishing a connection with the first communication device. Execute the process.

According to said structure, said connection control information which shows permitting connection with arbitrary said 2nd communication apparatus, when the connection with said 2nd communication apparatus is in the unestablished state in all the said communication parts. Is transmitted toward the unspecified second communication device. In the second communication device, when this connection control information is received, processing related to establishment of a connection with the first communication device is executed. Therefore, the second connection to the communication device in each of the communication unit that a state of unestablished, it is possible to establish a connection with any of the second communication device.

  Preferably, when the communication unit performs Bluetooth communication with the second communication device and transmits the connection control information to the unspecified second communication device, the connection control information is included. The transmitted advertising packet is transmitted to the second communication device.

  According to said structure, even when the said 2nd communication apparatus is operate | moving as a master in Bluetooth communication, it becomes possible to transmit the said connection control information at a desired timing from the said communication part which operate | moves as a slave.

  According to the present invention, it is possible to make it difficult for a plurality of communication units capable of establishing a connection with a communication partner independently to establish a connection with a plurality of different communication partners at the same time.

It is a figure which shows an example of the communication system which concerns on embodiment of this invention. It is a flowchart for demonstrating the operation | movement which concerns on the determination and notification of the connection permission in a 1st communication apparatus. It is a flowchart for demonstrating the operation | movement which concerns on the connection process in a 1st communication apparatus. It is a flowchart for demonstrating the operation | movement which concerns on the cutting | disconnection of connection and transmission of connection control information in a 1st communication apparatus. It is a flowchart for demonstrating the operation | movement which concerns on the connection process in a 2nd communication apparatus. It is a figure which shows the example which two 2nd communication apparatuses establish simultaneously with a 1st communication apparatus. It is a figure which shows the other example in which two 2nd communication apparatuses establish a connection with a 1st communication apparatus simultaneously. It is a figure which shows the example which one 2nd communication apparatus establishes a connection with a 1st communication apparatus.

Hereinafter, a communication system according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating an example of a communication system according to the present embodiment. The communication system shown in FIG. 1 includes a first communication device 10 and second communication devices M1 and M2 each assigned identification information. In one example, the first communication device 10 is a device that performs control such as unlocking and locking of a vehicle door, opening and closing of a window, and the like. Second communication devices M1 and M2 (hereinafter referred to as “second communication device without distinction”). M ”may be described as a mobile device such as a smartphone that transmits a control signal to the first communication device 10. The first communication device 10 and the second communication device M perform BT communication (wireless communication by BLE). The second communication device M operates as a master, and the first communication device 10 operates as a slave. The first communication device 10 (slave) performs processing for establishing a BT communication connection in response to a request from the second communication device M (master).

  In the example of FIG. 1, the first communication device 10 includes communication units 11A and 11B, control units 12A and 12B, antennas 13A and 13B, and an interface unit 14.

  Antennas 13A and 13B (hereinafter sometimes referred to as “antenna 13” without distinction) perform transmission and reception of 2.4 GHz band radio waves in BT communication.

  The communication units 11A and 11B (hereinafter may be referred to as “communication unit 11” without distinction) can each establish a BT communication connection with the second communication device M, and the BT communication. Various signal processing related to. For example, the communication unit 11 generates a baseband transmission signal by baseband processing specified in the BT, performs signal processing such as modulation, frequency conversion, and amplification on this to generate an RF signal and supplies it to the antenna 13. To do. In addition, the communication unit 11 performs signal processing such as amplification, frequency conversion, and demodulation on the RF signal received by the antenna 13 to generate a baseband received signal, and performs baseband processing defined by the BT on this. Generate received data. The communication unit 11 includes one or a plurality of integrated circuits that perform these signal processing.

  The communication unit 11 operates as a slave when performing BT communication with the second communication device M.

  When the communication unit 11 establishes a connection with the second communication device M, the communication unit 11 outputs identification information of the second communication device M. For example, the communication unit 11 stores the BD address (Bluetooth device address) of the second communication device M acquired at the time of pairing in association with identification information having a different value for each BD address in the internal memory. When establishing a connection with the paired second communication device M, the communication unit 11 reads out the identification information stored in association with the BD address of the second communication device M from the memory and outputs the information. The communication unit 11 may output the BD address as identification information as it is.

  When the communication unit 11 receives a notification regarding the second communication device M that permits connection of BT communication from the connection permission unit 121 of the control unit 12A described later, the communication unit 11 performs processing according to the content of the notification. That is, when the communication unit 11 is notified of the identification information of one second communication device M that permits connection from the connection permission unit 121, the communication unit 11 and the connection permission unit 121 are identified with the identification information of the currently connected second communication device M. The identification information notified from is collated. When both identification information does not correspond, the communication part 11 complete | finishes communication with the 2nd communication apparatus M in connection, and cuts a connection.

  On the other hand, the communication unit 11 has received a notification from the connection permission unit 121 indicating that the connection with the second communication device M is in an unestablished state and permits the connection with any second communication device M. In this case, connection control information indicating that connection with an arbitrary second communication device M is permitted is transmitted toward the unspecified second communication device M. When the communication unit 11 transmits connection control information toward the unspecified second communication device M, the communication unit 11 uses an advertising packet defined by BLE. The advertisement packet is a packet used to notify the surrounding communication devices that perform BT communication of the presence of the own device, and can send arbitrary data (manufacturer specific data) to other communication devices. . The communication unit 11 transmits an advertising packet including connection control information to the surrounding unspecified second communication device M. By using the advertising packet, connection control information can be transmitted at a desired timing from the communication unit 11 operating as a slave even when the second communication device M is operating as a master in Bluetooth communication.

  In addition, when the communication unit 11 is in a state where the connection with the second communication device M is not established and the identification information of one second communication device M that permits connection is notified from the connection permission unit 121, Connection control information indicating that connection with the second communication device M corresponding to the notified identification information is permitted and connection with the second communication device M corresponding to other identification information is prohibited is unspecified. It transmits toward the 2nd communication apparatus M. Also in this case, the communication unit 11 transmits an advertising packet including the connection control information to the surrounding unspecified second communication device M.

  The control unit 12A performs overall control of communication operations in the two communication units (11A, 11B) in accordance with an instruction from an upper control unit (not shown). For example, the control unit 12A obtains information related to the connection state from the communication units 11A and 11B (whether or not connected to the second communication device M, identification information of the connected second communication device M, etc.), and responds accordingly. Process. That is, when the control unit 12A acquires the information on the connection state from the communication units 11A and 11B, the control unit 12A permits the connection according to the process of transmitting the contents to the control unit (not shown) and the connection state of the communication units 11A and 11B. The second communication device M is determined, and processing for transmitting the determination to the communication units 11A and 11B is performed.

  In addition, when the communication unit 11A or 11B receives data from the second communication device M, the control unit 12A outputs the data from the interface unit 14 to a control unit (not shown), or from the control unit (not shown) to the interface unit 14. When the data transmission instruction is received via the communication unit 11, a process of transmitting the instructed data from the communication unit 11 to the second communication device M is performed.

  The control unit 12A includes a connection permission unit 121 as a functional block that performs processing related to determination of the second communication device M that permits connection.

  When the two identification information input from the communication unit 11A and the communication unit 11A that have established a connection with the second communication device M do not match, the connection permission unit 121 performs two second communication corresponding to the two identification information. One second communication device M that is permitted to connect is determined from the devices M. For example, the connection permission unit 121 has established a connection with the second communication device M after all the communication units 11 (communication units 11A and 11B) have not been connected to the second communication device M. When identification information is first input from one communication unit 11, connection with one second communication device M corresponding to the first input identification information is permitted. The connection permission unit 121 notifies the communication unit 11A and the communication unit 11B of identification information of one second communication device M that has decided to permit connection.

  Moreover, the connection permission part 121 permits connection with the arbitrary 2nd communication apparatus M, when the connection with the 2nd communication apparatus M is in the unestablished state in all the communication parts 11 (communication part 11A and 11B). This is notified to each communication unit 11.

  The control unit 12B relays signals (control signals, transmission / reception data, etc.) exchanged between the control unit 12A and the communication unit 11B. For example, the control unit 12 </ b> A and the control unit 12 </ b> B perform communication using a LIN (local interconnect network) that is a communication protocol between in-vehicle electronic devices. In LIN communication, the control unit 12A operates as a master, and the control unit 12B operates as a slave. When receiving a transmission request from the control unit 12A, the control unit 12B transmits information corresponding to the request (connection state of the communication unit 11B, identification information of the communication partner of the communication unit 11B, etc.) to the control unit 12A as a response. To do.

  The control units 12A and 12B include a computer, for example, and execute processing based on an instruction code of a program stored in a storage device (not shown). In another example, the control units 12A and 12B may realize at least a part of the processing by a hardware circuit configured by random logic or the like.

  The interface unit 14 is a device that performs communication for the control unit 12A to exchange signals with a control unit (for example, a vehicle body control module) (not shown). For example, the interface unit 14A can be connected with other protocols by a protocol such as CAN (controller area network) Communicates with the control unit.

  In the example of FIG. 1, the second communication device M includes an antenna 23 that performs transmission and reception of 2.4 GHz band radio waves in BT communication, a communication unit 21 that performs BT communication in the antenna 23, and a control unit 22.

  The communication unit 21 can establish a BT communication connection with the communication unit 11 of the first communication device 10 and performs various signal processing related to the BT communication in the same manner as the communication unit 11. The communication unit 21 operates as a master when performing BT communication with the first communication device 10.

  The control unit 22 performs overall control of communication operations in the communication unit 21. For example, the control unit 22 activates the BLE communication process of the communication unit 21 so that automatic connection with the first communication device 10 is possible. In addition, the control unit 22 transmits a control signal related to vehicle control (such as door unlocking) from the communication unit 21 to the first communication device 10 in accordance with a user operation on a user interface device (such as a touch panel) (not shown).

  When the control unit 22 receives an advertising packet including connection control information from the first communication device 10 when the connection with the first communication device 10 has not been established, the control unit 22 1 A process related to the connection with the communication apparatus 10 is executed or the execution of the process is postponed. That is, the control unit 22 permits connection with any second communication device M including the own device when connection control information indicating that the connection with the own device is permitted is received from the first communication device 10. When connection control information indicating this is received from the first communication device 10, processing related to establishment of a connection with the first communication device 10 is executed. On the other hand, when the control unit 22 receives connection control information indicating prohibition of connection with the own device from the first communication device 10, the control unit 22 forgoes execution of processing related to establishment of connection with the first communication device 10. .

  The control unit 22 includes a computer, for example, and executes processing based on an instruction code of a program stored in a storage device (not shown). In another example, the control unit 22 may realize at least a part of the processing by a hardware circuit configured by random logic or the like.

  Here, the operation of the communication system according to the present embodiment having the above-described configuration will be described.

FIG. 2 is a flowchart for explaining operations related to determination and notification of connection permission in the first communication device 10.
The connection permission unit 121 determines whether or not the latest connection state information has been acquired in the communication units 11A and 11B (ST100). That is, the connection permission unit 121 newly establishes a connection with the second communication device M in the communication units 11A and 11B and acquires the identification information thereof, and the second communication device M established so far. It is determined that the connection of is disconnected.

  When the latest connection state information is acquired, the connection permission unit 121 determines whether the connection with the second communication device M is not established in the two communication units 11A and 11B from the information. (ST110). If any of the connections is in an unestablished state, the connection permission unit 121 determines to permit the connection with an arbitrary second communication device M (ST115).

  On the other hand, when the connection permission unit 121 inputs the identification information of the second communication device M newly established as the latest connection state information from one of the communication units 11A and 11B, the identification information is It is determined whether or not the identification information is input first after the connection between the two communication units 11A and 11B is not established (ST120). When the first identification information after connection is not established in all the communication units 11 is input, the connection permission unit 121 permits connection with one second communication device M corresponding to the identification information. This is determined (ST125).

  The connection permission unit 121 determines whether or not the timing for notifying each communication unit 11 of the connection permission determination in step ST115 or ST125 has come (ST135). The timing for notifying the determination of the connection permission is determined for each communication unit 11, for example, and is set to a certain period. When this timing has arrived, the connection permission unit 121 notifies each communication unit 11 of the latest connection permission content determined in step ST115 or ST125 (ST140).

  The connection permission unit 121 repeatedly executes the processes in steps ST100 to ST140 described above until the communication operation with the second communication device M in the communication units 11A and 11B is completed (ST145).

  FIG. 3 is a flowchart for explaining an operation related to the connection process with the second communication device M in the first communication device 10. When receiving a connection request from the second communication device M (ST200), the communication unit 11 of the first communication device 10 determines whether or not the second communication device M has been paired (ST205). When the connection request source second communication device M has been paired, the communication unit 11 determines whether or not the second communication device M is permitted to connect in the notification from the connection permission unit 121 (ST210). . When the connection is permitted, the communication unit 11 executes a connection process with the second communication device M that is the connection request source, and establishes the connection (ST215). The communication unit 11 repeatedly executes the processes of steps ST200 to ST215 described above until the communication operation with the second communication apparatus M is completed (ST220).

  FIG. 4 is a flowchart for explaining operations related to disconnection of connection and transmission of connection control information in the first communication device 10. If the communication unit 11 of the first communication device 10 is currently connected to the second communication device M (ST300), the communication unit 11 determines whether the connection is permitted in the notification from the connection permission unit 121 (ST305). When the connection with the second communication device M is not permitted in the notification from the connection permission unit 121, the communication unit 11 performs a process of disconnecting the connection (ST310). On the other hand, when the connection with the second communication device M is in an unestablished state (ST300), the communication unit 11 determines whether or not it is a timing at which an advertising packet can be transmitted to the unspecified second communication device M. (ST315). When the timing at which an advertising packet can be transmitted has arrived, communication unit 11 transmits an advertising packet including connection control information corresponding to the determination details of connection permission notified from connection permission unit 121 (ST320). The communication unit 11 repeatedly executes the processes of steps ST300 to ST320 described above until the communication operation with the second communication device M is completed (ST325).

  FIG. 5 is a flowchart for explaining the operation related to the connection processing in the second communication apparatus M. Control unit 22 of second communication device M determines whether or not the advertising packet transmitted from first communication device 10 has been received by communication unit 21 (ST400). When the communication unit 21 receives the advertising packet, the control unit 22 acquires connection control information included in the advertising packet (ST405), and the connection between the own device and the first communication device 10 is established in the connection control information. It is determined whether or not it is permitted (ST410). In the connection control information, when the connection between the own device and the first communication device 10 is permitted or the connection between the arbitrary second communication device M and the first communication device 10 is permitted, the control unit 22 Performs a process of establishing a connection with the transmission source of the advertising packet (the communication unit 11 of the first communication device 10) (ST415). When connection between the other second communication device M and the first communication device 10 is permitted in the connection control information (that is, when connection between the own device and the first communication device 10 is prohibited), the control unit 22 suspends the establishment of the connection with the first communication device 10. The control unit 22 of the second communication device M repeatedly executes the processes of steps ST400 to ST415 described above until the communication operation with the first communication device 10 ends (ST420).

  FIG. 6 is a diagram illustrating an example in which two second communication devices M establish a connection with the first communication device 10 at the same time. Since both the communication unit 11A and the communication unit 11B are not yet connected to the second communication device M, the control unit 12A (connection permission unit 121) of the first communication device 10 is an arbitrary second communication device. It decides to allow connection with M. Control unit 12A (connection permission unit 121) notifies communication unit 11A of the determined content (ST500) and also notifies communication unit 11B via control unit 12B (ST510, ST512). Receiving this notification, the communication unit 11A and the communication unit 11B each send an advertising packet including connection control information indicating that connection with an arbitrary second communication device M is permitted to an unspecified second communication device. Transmit to M (ST502, ST514).

  The second communication device M1 receives the advertising packet transmitted from the communication unit 11A, and the second communication device M1 responds to this to establish a connection between the second communication device M1 and the communication unit 11A (ST504). . Control unit 12A inputs identification information of second communication device M1 from communication unit 11A that has established a connection with second communication device M1 (ST506). On the other hand, the second communication device M2 receives the advertising packet transmitted from the communication unit 11B, and the second communication device M2 responds to this to establish a connection between the second communication device M2 and the communication unit 11B ( ST516). Control unit 12B inputs identification information of second communication device M2 from communication unit 11B that has established a connection with second communication device M2 (ST518). The control unit 12A inquires of the control unit 12B whether or not the latest connection state information has been acquired (ST520). From the control unit 12B that responds to the inquiry, the control unit 12B determines the second communication device M2 connected to the communication unit 11B. Identification information is input (ST522).

  The control unit 12A first inputs the identification information of the second communication device M1 from the communication unit 11A after all the communication units 11 have not been connected to the second communication device M (ST506). Thereafter, identification information of the second communication device M2 is input from the communication unit 11B (ST522). Therefore, the control unit 12A (connection permission unit 121) determines to permit the connection with the second communication device M1. Control unit 12A (connection permission unit 121) notifies communication unit 11A of the determined content (ST530) and also notifies communication unit 11B via control unit 12B (ST532, ST534). The communication unit 11B disconnects the connection with the second communication device M2 because the currently connected second communication device M2 is not permitted to connect in the notification of the control unit 12A (connection permission unit 121) (ST536).

  The communication unit 11B that has not yet established a connection with the second communication device M receives an unspecified advertising packet including connection control information indicating that the connection with the second communication device M1 is permitted. 2 Transmit to the communication apparatus M (ST538). The second communication device M1 receives the advertising packet transmitted from the communication unit 11B, and the second communication device M1 responds to this to establish a connection between the second communication device M1 and the communication unit 11B (ST540). . Control unit 12B inputs identification information of second communication device M1 from communication unit 11B that has established a connection with second communication device M1 (ST542). The control unit 12A inquires to the control unit 12B whether or not the latest connection state information has been acquired (ST544). From the control unit 12B that responds to the inquiry, the communication unit 11B is connected to the second communication device M1 that is currently connected. Identification information is input (ST522). Thus, the state (state of ST516 to ST536) where the connection with the different second communication device M is simultaneously established in the two communication units 11 of the first communication device 10 is quickly eliminated.

  FIG. 7 is a diagram illustrating another example in which two second communication devices M establish a connection with the first communication device 10. Since both the communication unit 11A and the communication unit 11B are not yet connected to the second communication device M, the control unit 12A (connection permission unit 121) of the first communication device 10 is an arbitrary second communication device. It is determined that connection with M is permitted, and the determined contents are notified to communication units 11A and 11B (ST600, ST604, ST606). Receiving this notification, the communication unit 11A and the communication unit 11B each send an advertising packet including connection control information indicating that connection with an arbitrary second communication device M is permitted to an unspecified second communication device. Transmit to M (ST602, ST608).

  Since there is no response from the second communication device M to the advertising packet (ST602) from the communication unit 11A, and the communication unit 11A remains in an unconnected state, the control unit 12A (connection permission unit 121) can select any second It is determined again that the connection with the communication device M is permitted, and the determined content is notified to the communication unit 11A (ST614). Upon receiving this notification, the communication unit 11A transmits again the advertising packet including the connection control information indicating that the connection with the arbitrary second communication device M is permitted to the unspecified second communication device M. (ST616).

  The second communication device M2 receives the advertising packet transmitted from the communication unit 11B, and the second communication device M2 responds to this to establish a connection between the second communication device M2 and the communication unit 11B (ST610). . Control unit 12B inputs identification information of second communication device M2 from communication unit 11B that has established a connection with second communication device M2 (ST612). The control unit 12A inquires of the control unit 12B whether or not the latest connection state information has been acquired (ST618). From the control unit 12B that responds to the inquiry, the control unit 12B connects the communication unit 11B to the second communication device M2. Identification information is input (ST620). On the other hand, the second communication device M1 receives the advertising packet (ST616) transmitted for the second time from the communication unit 11A, and the second communication device M1 responds to this, whereby the second communication device M1 and the communication unit 11A Is established (ST622). Control unit 12A inputs identification information of second communication device M1 from communication unit 11A that has established a connection with second communication device M1 (ST624).

  The control unit 12A first inputs the identification information of the second communication device M2 from the communication unit 11B after all the communication units 11 have not been connected to the second communication device M (ST620). Thereafter, identification information of the second communication device M1 is input from the communication unit 11A (ST624). Therefore, the control unit 12A (connection permission unit 121) determines to permit the connection with the second communication device M2. Control unit 12A (connection permission unit 121) notifies communication unit 11A of the determined content (ST630) and notifies communication unit 11B via control unit 12B (ST626, ST628). The communication unit 11A disconnects the connection with the second communication device M1 because the currently connected second communication device M1 is not permitted to connect in the notification of the control unit 12A (connection permission unit 121) (ST632).

  The communication unit 11A in which the connection with the second communication device M has not been established receives an advertising packet including connection control information indicating that the connection with the second communication device M2 is permitted. 2 Transmit to the communication apparatus M (ST634). The second communication device M2 receives the advertising packet transmitted from the communication unit 11A, and the second communication device M2 responds to this to establish a connection between the second communication device M2 and the communication unit 11A (ST636). . Control unit 12A inputs identification information of second communication device M2 from communication unit 11A that has established a connection with second communication device M2 (ST638). The control unit 12A inquires of the control unit 12B whether or not the latest connection state information has been acquired (ST640). From the control unit 12B in response to the inquiry, the communication unit 11B is connected to the second communication device M2 that is connected. Identification information is input (ST642). As described above, also in the example of FIG. 7, the state where the connection with the different second communication device M is simultaneously established in the two communication units 11 of the first communication device 10 (the state of ST622 to ST632) is quickly resolved. Is done.

  FIG. 8 is a diagram illustrating an example in which one second communication device M establishes a connection with the first communication device 10. Since both the communication unit 11A and the communication unit 11B are not yet connected to the second communication device M, the control unit 12A (connection permission unit 121) of the first communication device 10 is an arbitrary second communication device. It is determined that connection with M is permitted, and the content of the determination is notified to communication units 11A and 11B (ST700, ST704, ST706). Receiving this notification, the communication unit 11A and the communication unit 11B each send an advertising packet including connection control information indicating that connection with an arbitrary second communication device M is permitted to an unspecified second communication device. Transmit to M (ST702, ST708).

  The second communication device M1 receives the advertising packet (ST702) transmitted from the communication unit 11A, and the second communication device M1 responds to it, thereby establishing a connection between the second communication device M1 and the communication unit 11A. (ST710). Control unit 12A inputs identification information of second communication device M1 from communication unit 11A that has established a connection with second communication device M1 (ST712). At this time, since there is no response from the second communication device M to the advertising packet (ST708) from the communication unit 11B, the communication unit 11B remains in an unestablished connection with the second communication device M.

  The control unit 12A first inputs identification information of the second communication device M1 from the communication unit 11A after all the communication units 11 have not been connected to the second communication device M (ST712). Therefore, the control unit 12A (connection permission unit 121) determines to permit the connection with the second communication device M1. Control unit 12A (connection permission unit 121) notifies the determination contents to communication units 11A and 11B (ST720, ST722, ST724).

  The communication unit 11B in which the connection with the second communication device M has not yet been established receives an advertising packet including connection control information indicating that the connection with the second communication device M1 is permitted. It transmits toward the 2nd communication apparatus M (ST726). The second communication device M1 receives the advertising packet transmitted from the communication unit 11B, and the second communication device M1 responds to this to establish a connection between the second communication device M1 and the communication unit 11B (ST728). . Control unit 12B inputs identification information of second communication device M1 from communication unit 11B that has established a connection with second communication device M1 (ST730). The control unit 12A inquires of the control unit 12B whether or not the latest connection state information has been acquired (ST740). From the control unit 12B that responds to the inquiry, the communication unit 11B is connected to the second communication device M1 that is connected. Identification information is input (ST742).

  As described above, according to the present embodiment, when connections with a plurality of second communication devices M are established in a plurality of communication units 11, a connection is permitted from among the plurality of second communication devices M. One second communication device M to be determined is determined, and the determination is notified to each communication unit 11. And in the communication part 11 currently connected with the 2nd communication apparatus M different from the 2nd communication apparatus M which permits a connection, the connection with the said different communication partner is cut | disconnected. Therefore, it is possible to eliminate the state in which the connections with the plurality of second communication devices M are simultaneously established in the plurality of communication units 11, and it is possible to make such a state difficult to occur.

  Further, according to the present embodiment, after identification information is first input from one communication unit 11 after all the communication units 11 are not yet connected to the second communication device M, One second communication device M corresponding to the identification information input first is determined as a second communication device M that permits connection in the connection permission unit 121. Thereby, after the connection with one second communication device M is permitted, the connection permission unit 121 does not permit the connection with the other second communication device M, so that the connection permission target is frequently changed. It becomes difficult and stable communication can be performed.

  Furthermore, according to the present embodiment, an advertising packet including connection control information is transmitted from the communication unit 11 in a connection unestablished state toward an unspecified communication partner. This connection control information permits connection with the second communication device M corresponding to the identification information notified from the connection permission unit 121, and prohibits connection with the second communication device M corresponding to other identification information. Indicates to do. In the second communication device M permitted to connect by the connection permission unit 121, when an advertising packet including connection control information is received, processing related to establishment of a connection with the first communication device 10 is executed. On the other hand, in the second communication device M other than the second communication device M permitted to connect by the connection permission unit 121, when the advertising packet including the connection control information is received, the connection with the first communication device 10 is established. Related processes are not executed. Therefore, the communication unit 11 in the connection unestablished state can establish a connection with the second communication device M permitted by the connection permission unit 121 and can communicate with the second communication device M that is not permitted by the connection permission unit 121. Connection can be effectively avoided.

  Further, according to the present embodiment, connection control indicating that connection with any second communication device M is permitted when connection with the second communication device M is not established in all the communication units 11. An advertising packet including information is transmitted from each communication unit 11 toward the unspecified second communication device M. In the second communication device M, when an advertising packet including this connection control information is received, processing related to establishment of a connection with the first communication device 10 is executed. Therefore, even if the connection with the second communication device M is not established in each communication unit 11, it is possible to establish a connection with any second communication device M.

  In addition, this invention is not limited only to embodiment mentioned above, Various modifications are included. That is, those skilled in the art may make various changes, combinations, sub-combinations, and alternatives regarding the components of the above-described embodiments within the technical scope of the present invention or an equivalent scope thereof.

  For example, in the above-described embodiment, the example in which the first communication device 10 includes two communication units 11 has been described. However, in another embodiment of the present invention, the first communication device 10 includes three or more communication units 11. You may go out.

  In the embodiment described above, an example in which there are two second communication devices M that can be connected to the first communication device 10 has been described. However, in other embodiments of the present invention, the number of second communication devices M is 3 or more. May be.

  In the above-described embodiment, the example in which the communication unit 11 of the first communication device 10 operates as a slave of BT communication and the second communication device M operates as a master of BT communication has been described. Then, the communication unit 11 may operate as a master and the second communication device M may operate as a slave.

DESCRIPTION OF SYMBOLS 10 ... 1st communication apparatus 11, 11A, 11B ... Communication part 12, 12A, 12B ... Control part 121 ... Connection permission part 13, 13A, 13B ... Antenna 14 ... Interface part M, M1, M2 ... 2nd communication apparatus 21 ... Communication unit 22 ... control unit 23 ... antenna

Claims (10)

It is possible to establish a connection with a communication partner by wireless communication, and when establishing a connection with the communication partner, at least two communication units that output identification information of the communication partner;
One communication partner that permits connection from among a plurality of communication partners corresponding to the plurality of identification information when the plurality of identification information input from the plurality of communication units that have established connections with the communication partner do not match It determines the identity of the one communication partner to allow the connection and a connection permission unit configured to notify each of the communication unit,
The communication unit disconnects the connection with the communication partner if the identification information notified from the connection permission unit is different from the identification information of the communication partner currently connected.
Communication device. When the identification information is first input from one of the communication units after all the communication units have not yet established a connection with a communication partner in all the communication units, the identification information input first A connection with one communication partner corresponding to the above, and notifying each communication unit of identification information of one communication partner that permits the connection,
The communication apparatus according to claim 1. When the connection with the communication partner is in an unestablished state, the communication unit permits connection with the communication partner corresponding to the identification information notified from the connection permission unit, and supports other identification information. Sending connection control information indicating that connection with the communication partner is prohibited to an unspecified communication partner,
The communication apparatus according to claim 1 or 2. The connection permission unit, when the connection with the communication partner in all of the communication unit is in a state not established, to allow a connection with any communication partner is notified to each of said communication unit,
The communication unit permits connection with an arbitrary communication partner when the connection with the communication partner is in an unestablished state and is notified from the connection permission unit that connection with an arbitrary communication partner is permitted. sending towards said connection control information unspecified communication partner indicating that,
The communication apparatus according to claim 3. When the communication unit performs Bluetooth communication with a communication partner and transmits the connection control information to an unspecified communication partner, the communication unit transmits an advertising packet including the connection control information to the communication partner. To
The communication apparatus according to claim 3 or 4. A first communication device, and a plurality of second communication devices each assigned identification information,
The first communication device is
At least two communication units each capable of establishing a connection with the second communication device by wireless communication and outputting identification information of the second communication device when establishing a connection with the second communication device When,
When a plurality of the identification information input from a plurality of the communication units that have established a connection with the second communication device do not match, a connection is permitted from a plurality of second communication devices corresponding to the plurality of identification information to determine one of the second communication device, the identification information of the permission to one of the second communication device the connection and a connection permission unit configured to notify each of the communication unit,
The communication unit disconnects the connection with the second communication device when the identification information notified from the connection permission unit is different from the identification information of the currently connected second communication device.
Communications system. The connection permission unit, when all the communication units are connected to the second communication device in an unestablished state, when the identification information is first input from one communication unit, and was allowed to connect to the corresponding one of the second communication device identification information, and notifies the identification information of one of said second communication device to allow the connection to each of said communication unit,
The communication system according to claim 6. When the connection with the second communication device is in an unestablished state, the communication unit permits the connection with the second communication device corresponding to the identification information notified from the connection permission unit, and others Transmitting connection control information indicating prohibition of connection with the second communication device corresponding to the identification information to the unspecified second communication device,
When the second communication device receives from the first communication device the connection control information indicating that the connection between the first communication device and the first communication device is permitted, the second communication device is involved in establishing a connection with the first communication device. If the connection control information indicating that the connection between the own device and the first communication device is prohibited is received from the first communication device, the establishment of the connection with the first communication device is suspended.
The communication system according to claim 6 or 7. The connection permission unit, notification when the connection to the second communication device in all of the communication unit is in a state not established, to allow a connection with any of the second communication device to each of said communication unit And
When the communication unit is in a state where the connection with the second communication device has not been established, and when the connection permission unit is notified that the connection with the arbitrary second communication device is permitted, the connection control information indicating the permission of the connection between the second communication device and transmitted to unspecified the second communication device,
When the second communication device receives from the first communication device the connection control information indicating that a connection with any second communication device is permitted, the second communication device is involved in establishing a connection with the first communication device. Execute the process,
The communication system according to claim 8. When the communication unit performs Bluetooth communication with the second communication device and transmits the connection control information to the unspecified second communication device, the communication unit includes the connection control information included in the advertising. Transmitting the packet to the second communication device;
The communication system according to claim 8 or 9.

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