JP4630310B2 - Communication terminal, communication system, and communication connection method - Google Patents

Description

  The present invention relates to a communication terminal, a communication system, and a communication connection method for establishing communication connection with a counterpart communication terminal by a communication method including connection determination.

2. Description of the Related Art Conventionally, a method for performing data communication by connecting to a partner communication terminal (communication partner terminal) by a communication method including connection determination is known. For example, Patent Document 1 below discloses an imaging apparatus that communicates with peripheral devices such as a printer and a display using a communication method such as Bluetooth. In order for a communication terminal to communicate with a communication partner terminal for the first time via Bluetooth, it is necessary to establish a communication connection after performing a pairing process between these communication terminals. In order to perform this pairing process, a process for placing a communication partner terminal in a search waiting state, a process for searching for a communication partner terminal in a communication terminal requesting connection, and a passcode (Personal Identification Number, PIN) as authentication information Processing to accept input is required.
JP 2004-328271 A

  However, since the passcode needs to be input by both the user of the communication terminal and the user of the communication partner terminal, a load is imposed on the user, and it takes time to establish a communication connection after determining whether or not the connection is possible. Resulting in. When a communication terminal that has already been connected to many devices is replaced, it is necessary to perform pairing processing with each of the devices in the replaced communication terminal, which requires more time and labor. For example, when a portable audio player connected to a personal computer (PC), a speaker, a stereo, a headphone, etc. is replaced, the user of the portable audio player repeatedly performs pairing processing on a device such as a PC. Need to repeat.

  SUMMARY An advantage of some aspects of the invention is that it provides a communication terminal, a communication system, and a communication connection method capable of easily connecting communication terminals.

The communication terminal of the present invention is used to generate a link key generated by the communication partner terminal and the link key for establishing a communication connection by short-range wireless communication with the communication partner terminal that is the communication partner. Request side database storing random numbers in advance, link key and random number stored in request side database, request side transmitting means for transmitting random numbers to communication partner terminal, transmission of link key and random number by request side transmitting means And a communication connection with the communication partner terminal based on the permission signal received by the request side reception unit, and a request side reception unit that receives a permission signal indicating that the communication connection is permitted, transmitted from the communication partner terminal. and a requesting connection means for establishing a communication partner terminal, the link key and turbulent sent by the connection address and requesting transmission means for identifying the correspondent terminal Comparing the code number derived based on the above and the code number stored in advance in the communication partner terminal, and transmitting a permission signal when these code numbers match. Features.

The communication connection method according to the present invention generates a link key generated at the communication partner terminal and the link key for establishing a communication connection by short-range wireless communication with the communication partner terminal as the communication partner. A communication connection method in a communication terminal comprising a requesting database that stores in advance a random number used in the communication terminal, wherein the communication terminal transmits the link key and random number stored in the requesting database to the communication partner terminal A request-side transmission step, and a request-side reception step in which the communication terminal receives a permission signal transmitted from the communication partner terminal in response to the transmission of the link key and the random number in the request-side transmission step and indicating that the communication connection is permitted. The communication terminal establishes a communication connection with the communication partner terminal based on the permission signal received in the request reception step. It is seen including a flop, the communication partner terminal, and the personal identification number derived based on the transmitted link key and the random number in the connection address and requesting transmission step for identifying the communication terminal, in advance the remote terminal A comparison is made as to whether or not the stored personal identification number matches, and if they match, a permission signal is transmitted .

According to such a communication terminal and communication connection method, the link key stored in the database in advance and the random number used when generating the link key are read out and transmitted to the communication partner terminal. Accordingly, the permission signal transmitted from the communication partner terminal is received. Then, communication connection with the communication partner terminal is established based on the received permission signal. Accordingly, communication terminals can be easily connected without causing the user of the communication partner terminal to input authentication information such as a personal identification number, and the time required for establishing the communication connection can be shortened.

In the communication terminal of the present invention, the request side database further stores in advance a connection address for identifying the communication partner terminal, and the request side transmission means transmits the connection address stored in the request side database to the communication partner terminal, It is preferable to transmit a link key and a random number to the communication partner terminal after receiving a response signal transmitted from the communication partner terminal in response to the transmission.

In this case, the connection address of the communication partner terminal stored in the database in advance is transmitted to the communication partner terminal, and the link key and random number are received after receiving the response signal transmitted from the communication partner terminal in response to this transmission. Sent. By transmitting the connection address of the communication partner terminal to the communication partner terminal in this way, a response signal is immediately acquired from the communication partner terminal without putting the communication partner terminal in a search waiting state, and a link key and a random number are obtained. Can be sent. Therefore, the communication terminals can be more easily connected to each other, and the time required for establishing the communication connection can be further shortened.

In the communication terminal of the present invention, the link key and the random number stored in the request side database are based on the password entered based on the password entered at the communication partner terminal when the communication partner terminal is first connected , and the link key It is preferably a random number used when generating .

In this case, the link key based on the password entered at the communication partner terminal when first connected to the communication partner terminal and the random number used when generating the link key are stored in the database. As a result, when reconnecting to a communication partner terminal once successfully connected, the link key and random number used when the connection is successful can be reused. As a result, communication terminals can be easily connected to each other, and the time required for establishing a communication connection can be shortened.

The communication terminal of the present invention further comprises authentication information receiving means for receiving a link key stored in the database of another communication terminal and a random number used when generating the link key, and stored in the requesting database. and which link key and the random number is preferably a link key and the random number received by the authentication information receiving means.

In this case, the link key stored in the database of the other communication terminal and the random number used when generating the link key are received and stored in the database of the own terminal. Thereby, the link key used in the other communication terminal and the random number used when generating the link key can be reused in the own terminal. As a result, the own terminal and the communication partner terminal can be easily connected, and the time required for establishing the communication connection can be shortened.

The communication terminal of the present invention is a communication terminal that communicates with a communication partner terminal that is a communication partner, and that stores in advance a personal identification number for establishing a communication connection by short-range wireless communication with the communication partner terminal Side database, an authentication side receiving means for receiving a link key and a random number for deriving a personal identification number from a communication partner terminal, a connection address for identifying the communication terminal, and a link key and a random number received by the authentication side receiving means A determination is made as to whether or not the personal identification number derived based on the personal identification number stored in the authenticating database matches, and if these personal identification numbers match, it is determined to establish communication connection with the communication partner terminal And the communication partner, when the determination means determines that the communication connection with the communication partner terminal is to be established, a permission signal indicating that the communication connection is permitted to the communication partner terminal. By transmitting end to, and an authentication-side connection means for establishing a connection with the remote terminal.

Further, the communication connection method of the present invention is a communication connection method in a communication terminal provided with an authentication side database that stores in advance a personal identification number for establishing a communication connection by short-range wireless communication with a communication partner terminal that is a communication partner. In the authentication side reception step in which the communication terminal receives the link key and random number for deriving the personal identification number from the communication partner terminal, and in the connection address and authentication side reception step in which the communication terminal identifies the communication terminal It is determined whether the personal identification number derived based on the received link key and random number matches the personal identification number stored in the authenticating database, and if these personal identification numbers match , the communication partner if a determination step that the communication connection with the terminal, the communication terminal is determined to be a communication connection with the communication partner terminal in the determination step, the An authentication-side connection step for establishing a connection with the communication partner terminal by transmitting to the communication partner terminal a permission signal indicating permission of the communication connection to the communication partner terminal. .

According to such a communication terminal and communication connection method, when a link key and a random number are received from a communication partner terminal , a personal identification number is derived based on the connection address of the communication terminal and the received link key and random number. The password stored in advance in the database is read out, and it is determined whether or not to establish communication connection with the communication partner terminal based on whether or not these two passwords match . When it is determined that communication connection is to be made, a permission signal is transmitted to the communication partner terminal, and communication connection with the communication partner terminal is established. Thereby, the communication terminals can be easily connected to each other without allowing the user of the communication terminal to input authentication information such as a personal identification number necessary for determining whether or not the communication connection is permitted, and the time required for establishing the communication connection can be shortened.

The communication system of the present invention is a communication system including a communication terminal and a communication partner terminal that is a communication partner of the communication terminal, and the communication terminal communicates with the communication partner terminal that is the communication partner by short-range wireless communication. the to establish, in advance and requesting a database that stores the link key stored in the request-side database and a random number used in generating the link key and the link key generated in the communication partner terminal and a requesting transmission means for transmitting the random number to the communication partner terminal, transmitted from the communication partner terminal in response to the transmission of the link key and the random number by requesting transmission means, receiving a permission signal indicating the permission of the communication connection Request-side receiving means, and request-side connecting means for establishing a communication connection with a communication partner terminal based on the permission signal received by the request-side receiving means. Terminal, the authentication-side database that stores a personal identification number for establishing a communication connection by short-range wireless communication with the communication terminal in advance, the authentication side receiver which receives a link key and the random number sent by the requester transmitting means Whether the password derived based on the connection address for identifying the communication partner terminal, the link key and the random number received by the authenticating receiving means, and the secret code stored in the authenticating database or determines, when these PIN numbers match, a determination unit that communication connection with the communication terminal, when it is determined that the communication connection with the communication terminal by the determination means, to said communication terminal And authenticating connection means for establishing a connection with the communication terminal by transmitting a permission signal indicating permission of the communication connection to the communication terminal. .

According to such a communication system, first, the link key stored in advance in the database of the communication terminal and the random number used when generating the link key are read and transmitted to the communication partner terminal. Subsequently, in the communication partner terminal, a password is derived based on the connection address of the communication partner terminal, the link key from the communication terminal, and a random number, and the derived password is stored in advance in the database of the communication partner terminal. It is determined whether or not the passwords match, and when these passwords match , it is determined to establish a communication connection with the communication terminal. Subsequently, when it is determined that a communication connection is established in the communication partner terminal, a permission signal is transmitted from the communication partner terminal to the communication terminal. Then, a communication connection is established between the communication partner terminal that has transmitted the permission signal and the communication terminal that has received the permission signal. Accordingly, the communication terminals can be easily connected to each other without causing both the user of the communication terminal and the user of the communication partner terminal to input authentication information such as a password, and the time required for establishing the communication connection can be shortened.

Such communication terminal, according to the communication system and a communication connection, the communication connection based on the information that is stored in advance is established, can be connected to communication between terminals in a simple manner.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements are denoted by the same reference numerals, and redundant description is omitted.

  First, the communication system 1 which concerns on embodiment is demonstrated using FIG. FIG. 1 is a diagram showing the overall configuration of the communication system 1. FIG. 2 is a diagram showing a hardware configuration of the mobile phone 10 shown in FIG. FIG. 3 is a diagram showing the configuration of the authentication information storage unit 11 shown in FIG. FIG. 4 is a hardware configuration diagram of the counterpart device 20 shown in FIG. FIG. 5 is a diagram illustrating a state in which the mobile phone 10 illustrated in FIG. 1 is connected to a plurality of communication partner terminals.

  The communication system 1 includes a mobile phone 10 and a counterpart device 20. The mobile phone 10 and the partner device 20 can be connected to each other and perform data communication by Bluetooth, which is one of the wireless communication methods. Hereinafter, each terminal will be described with the mobile phone 10 as a communication terminal that requests pairing and the counterpart device 20 as a communication terminal that requires pairing.

  In order to establish a communication connection with the counterpart device 20, the cellular phone 10 includes, as functional components, an authentication information storage unit 11, an external interface 12, a signal generation unit 13, a transmission unit 14, a reception unit 15, and an information extraction unit 16. And a connecting portion 17.

  As shown in FIG. 2, the cellular phone 10 includes a CPU 101 that executes an operating system, application programs, and the like, a main storage unit 102 that includes ROM and RAM, an auxiliary storage unit 103 that includes memory, and predetermined communication. The communication control unit 104 performs data communication using a method, the display unit 105 includes a liquid crystal monitor, and the operation unit 106 includes keys for inputting characters and numbers and executing instructions. Each function shown in FIG. 1 reads predetermined software on the CPU 101 and the main storage unit 102 shown in FIG. 2 and operates the communication control unit 104 under the control of the CPU 101, as well as the main storage unit 102 and the auxiliary storage unit. This is realized by reading and writing data in the unit 103.

  The authentication information storage unit 11 is a requesting database in which authentication information based on information to be generated by the counterpart device 20 for establishing a Bluetooth communication connection with the counterpart device 20 is stored in advance. Specifically, the authentication information storage unit 11 includes a connection address that is a physical address determined for each communication terminal that supports Bluetooth, and a link key that is registered when a plurality of communication terminals are connected to each other via Bluetooth. (Authentication information) and a combination of three types of information (hereinafter referred to as “records”), which are random numbers (authentication information) used to calculate the link key, are stored. Here, the link key is generated based on the connection address of the communication partner device, the PIN (Personal Identification Number) generated by being input by the communication partner device, and the random number generated by the communication partner device. Is. The authentication information storage unit 11 stores one record for each communication partner terminal that is a communication partner of the mobile phone 10.

  For example, as shown in FIG. 3, the authentication information storage unit 11 stores a record “connection address 2, link key 2, random number 2” corresponding to the counterpart device 20. In the example illustrated in FIG. 3, the authentication information storage unit 11 stores records for a plurality of communication partner terminals including the partner device 20.

  Note that how the authentication information storage unit 11 is mounted is not limited. For example, the authentication information storage unit 11 may be configured by a file or a relational database.

  Returning to FIG. 1, the external interface 12 is authentication information receiving means for receiving authentication information stored in a database of another communication terminal (not shown). The standard of the external interface 12 is not limited. For example, it is possible to adopt a wired connection method using USB (Universal Serial Bus) or a wireless connection method such as infrared communication or Bluetooth.

  The authentication information is received as follows, for example. First, an instruction for transmitting authentication information is received at a communication terminal (not shown), and authentication information stored in the communication terminal is read based on the instruction. The read authentication information is transmitted from an external interface of a communication terminal (not shown) and received by the external interface 12 of the mobile phone 10. For example, the external interface 12 receives the record shown in FIG.

  The external interface 12 can transmit not only the authentication information but also the authentication information. In this case, the external interface 12 reads the authentication information from the authentication information storage unit 11 and transmits the authentication information to an external interface of a communication terminal (not shown). Thereby, it becomes possible to move authentication information between communication terminals.

  The signal generation unit 13 is a means for generating a signal to be transmitted to the counterpart device 20 for communication connection with the counterpart device 20, and constitutes a part of the transmission means.

  Specifically, the signal generation unit 13 receives an input of an instruction signal indicating a communication connection instruction, and reads a connection address from the authentication information storage unit 11 based on the received instruction signal. Subsequently, the signal generation unit 13 generates a search signal including the read connection address (hereinafter referred to as “partner connection address”), and outputs the generated search signal to the transmission unit 14. Here, the search signal is a signal for searching for a communication partner terminal having a partner connection address. For example, the signal generation unit 13 generates a search signal including the partner connection address “connection address 2” and outputs the search signal to the transmission unit 14.

  Note that the instruction signal input to the signal generation unit 13 may be generated based on an instruction input by the user of the mobile phone 10 via a user interface (not shown), or a predetermined execution executed inside the mobile phone 10. It may be automatically generated by the program.

  The signal generation unit 13 corresponds to the link key and random number corresponding to the response information based on the response information (described later) input from the information extraction unit 16, in other words, the connection address read based on the instruction signal. The link key and random number are read from the authentication information storage unit 11. Subsequently, the signal generation unit 13 generates a request signal including the read link key and random number, and outputs the generated request signal to the transmission unit 14. Here, the request signal is a signal for requesting pairing to the communication partner terminal (the partner device 20 in this embodiment) that has transmitted the response signal. For example, the signal generation unit 13 generates a request signal including the link key “link key 2” and the random number “random number 2” and outputs the request signal to the transmission unit 14.

  The transmission unit 14 is means for transmitting various signals input from the signal generation unit 13 to other communication terminals. Specifically, the transmission unit 14 transmits the search signal input from the signal generation unit 13 to the communication partner terminal to be connected, in other words, the communication partner terminal having the connection address included in the search signal. For example, the transmission unit 14 transmits a search signal including the connection address “connection address 2”. Further, the transmission unit 14 transmits the request signal input from the signal generation unit to the searched communication partner terminal. Thus, the transmission unit 14 constitutes a part of request side transmission means.

  The receiving unit 15 is a request side receiving unit that receives various signals transmitted from the counterpart device 20 that is a communication counterpart terminal and outputs the signals to the information extraction unit 16. There are three types of signals received by the receiving unit 15: a response signal, a permission signal, and a rejection signal.

  The information extraction unit 16 is means for extracting information included in various signals input from the reception unit 15. When a response signal is input, the information extraction unit 16 extracts response information (described later) from the response signal, and outputs the extracted response information to the signal generation unit 13. When a permission signal is input, the information extraction unit 16 extracts permission information from the permission signal and outputs the permission information to the connection unit 17. When a rejection signal is input, the information extraction unit 16 extracts rejection information (described later) from the rejection signal, and outputs the extracted rejection information to the connection unit 17.

  The connection unit 17 is a request side connection unit that establishes a communication connection with the counterpart device 20 based on the permission information input from the information extraction unit 16. In this case, the connection unit 17 establishes a communication connection in accordance with the Bluetooth standard. On the other hand, when rejection information is input from the information extraction unit 16, the connection unit 17 ends the connection request to the counterpart device 20 in accordance with the Bluetooth standard. Then, the connection unit 17 notifies a functional component (for example, a user interface or a predetermined application program (both not shown)) that has requested communication connection with the counterpart device 20 that communication processing has been completed.

  In order to establish a communication connection with the mobile phone 10, the counterpart device 20 includes, as functional components, an address storage unit 21, a PIN storage unit 22, a reception unit 23, an information extraction unit 24, a search determination unit 25, and a PIN calculation unit. 26, a PIN determination unit 27, a signal generation unit 28, a transmission unit 29, and a connection unit 30. Examples of the counterpart device 20 include a personal computer, a speaker, a wireless earphone, and a stereo.

  As shown in FIG. 4, the counterpart device 20 includes a CPU 201 that executes an operating system, application programs, and the like, a main storage unit 202 that includes ROM and RAM, an auxiliary storage unit 203 that includes a hard disk, and predetermined communication. It comprises a communication control unit 204 for performing communication in a system, an input unit 205 such as a button, and an output unit 206 such as a monitor. Each function shown in FIG. 1 reads predetermined software on the CPU 201 and the main storage unit 202 shown in FIG. 4 and operates the communication control unit 204 under the control of the CPU 201. This is realized by reading and writing data in the unit 203.

  The address storage unit 21 is a database that stores a connection address for identifying the counterpart device 20. For example, the address storage unit 21 stores a connection address “connection address 2”.

  The PIN storage unit 22 is an authentication-side database that stores in advance a PIN for establishing a Bluetooth communication connection with the mobile phone 10. For example, the PIN storage unit 22 stores the PIN “PIN2”.

  The receiving unit 23 is an authentication-side receiving unit that receives various signals transmitted from the mobile phone 10 that requests pairing and outputs the signals to the information extracting unit 24. There are two types of signals received by the receiving unit 23: a search signal and a request signal.

  The information extraction unit 24 is means for extracting predetermined information from various signals input from the reception unit 23. When the search signal is input, the information extraction unit 24 extracts the partner connection address from the search signal and outputs the transmitted partner connection address to the search determination unit 25. When a request signal is input, the information extraction unit 24 extracts a link key and a random number from the request signal, and outputs the extracted link key and random number to the PIN calculation unit.

  The search determination unit 25 determines whether or not the partner connection address input from the information extraction unit 24 is a connection address stored in the address storage unit 21 (connection address of the partner device 20). If these two connection addresses match, the search determination unit 25 determines that the counterpart device 20 is being searched by another communication terminal (the mobile phone 10 in the present embodiment), and the communication terminal ( Response information for notifying the mobile phone 10) of the presence of the counterpart device 20 is generated according to a predetermined communication standard. The other communication terminal (mobile phone 10) can know that the counterpart device 20 actually exists in the vicinity by receiving and analyzing the response information, and for communication connection with the counterpart device 20 thereafter. It becomes possible to send and receive information. The search determination unit 25 outputs the generated response information to the signal generation unit 28. On the other hand, if the two connection addresses are different, the search determination unit 25 ends the process.

  By receiving the search signal including the connection address in this way, the counterpart device 20 can respond to the mobile phone 10 that has transmitted the search signal without waiting for the search.

  When the link key and the random number are input from the information extraction unit 24, the PIN calculation unit 26 reads the connection address of the counterpart device 20 from the address storage unit 21. Subsequently, the PIN calculation unit 26 derives the PIN from the connection address, link key, and random number of the counterpart device 20 using a predetermined PIN calculation algorithm. Subsequently, the PIN calculation unit 26 outputs the derived PIN to the PIN determination unit 27. For example, the PIN calculation unit 26 derives the PIN “PIN2” by giving a connection address “connection address 2”, a link key “link key 2”, and a random number “random number 2” to a predetermined PIN calculation algorithm.

  When a PIN is input from the PIN calculation unit 26, the PIN determination unit 27 reads the PIN stored in the PIN storage unit 22, and determines whether these two PINs match. Here, if the two PINs match, the PIN determination unit 27 determines that communication connection with the mobile phone 10 is to be performed, and determines that communication connection is not to be performed if the PINs are different. Subsequently, the PIN determination unit 27 outputs a determination signal indicating the determination result (whether communication connection is possible) to the signal generation unit 28. For example, if both the read PIN and the input PIN are “PIN2”, the PIN determination unit 27 determines to establish a communication connection. On the other hand, if the read PIN is “PIN2” and the input PIN is “PIN2 ′”, the PIN determination unit 27 determines not to perform communication connection.

  That is, the PIN calculation unit 26 and the PIN determination unit 27 determine whether to establish communication connection with the mobile phone 10 based on the authentication information received by the reception unit 23 and the authentication information stored in the PIN storage unit 22. It is the determination means which determines. By using the PIN derived based on the link key input in this way and the PIN stored in advance, the counterpart device 20 does not accept the input of the PIN by the user (the PIN based on the user's input). It is possible to determine whether or not to establish a communication connection with the mobile phone 10 (without generating).

  The signal generation unit 28 is a unit that generates a signal to be transmitted to the mobile phone 10 based on the response information input from the search determination unit 25 or the determination signal input from the PIN determination unit 27.

  Specifically, when the response information is input from the search determination unit 25, the signal generation unit 28 generates a response signal including the response information and outputs the response signal to the transmission unit 14. On the other hand, when a determination signal is input from the PIN determination unit 27, the signal generation unit 28 analyzes the determination signal and acquires the result of the determination performed by the PIN determination unit 27. Specifically, when the determination result indicates that communication connection with the mobile phone 10 is performed, the signal generation unit 28 generates a permission signal including permission information indicating permission of communication connection, and the permission signal Is output to the transmission unit 29 and the connection unit 30. On the other hand, when the determination result indicates that communication connection with the mobile phone 10 is not performed, the signal generation unit 28 generates a rejection signal including rejection information indicating rejection of the communication connection, and the rejection signal Is output to the transmission unit 29.

  The transmission unit 29 is means for transmitting the response signal, permission signal, or rejection signal input from the signal generation unit 28 to the partner communication terminal (the mobile phone 10).

  The connection unit 30 is means for establishing a communication connection with the mobile phone 10 based on the permission signal input from the signal generation unit 28. The connection unit 30 establishes a communication connection according to the Bluetooth standard. Subsequently, the connection unit 30 notifies other functional components (for example, a user interface or a predetermined application program) (not shown) that the communication connection with the mobile phone 10 has been established as necessary.

  As described above, when it is determined that the signal generation unit 28, the transmission unit 29, and the connection unit 30 establish a communication connection with the communication partner terminal, the signal generation unit 28, the transmission unit 29, and the connection unit 30 transmit a permission signal indicating that the communication connection terminal is permitted to communicate. An authentication side connection means for establishing a connection with the communication partner terminal is configured by transmitting to the communication partner terminal.

  Note that the mobile phone 10 can establish communication connections with a plurality of communication partner terminals. For example, as shown in FIG. 5, the mobile phone 10 can establish a Bluetooth communication connection with a car navigation system 40, a personal digital assistant (hereinafter referred to as “PDA”) 50, and a wireless earphone 60. . Below, the function of each component of the mobile phone 10 that establishes a connection with these three communication partner terminals will be supplementarily described. The functional components and hardware configurations of the car navigation system 40, the PDA 50, and the wireless earphone 60 are the same as those of the counterpart device 20. Further, the authentication information storage unit 11 of the mobile phone 10 records the record “connection address 2, link key 2, random number 2” for the car navigation system 40 and the record “connection address 3, link key 3, random number 3” for the PDA 50. And the record “connection address 4, link key 4, random number 4” for the wireless earphone 60 is stored.

  When the signal generation unit 13 receives an input of an instruction signal indicating an instruction for communication connection with the car navigation system 40, the PDA 50, and the wireless earphone 60, the signal generation unit 13 reads the connection address for one unit from the authentication information storage unit 11. For example, the connection address “connection address 2” stored at the top of the authentication information storage unit 11 is read. Subsequently, the signal generation unit 13 generates a search signal including the read connection address and outputs the search signal to the transmission unit 14.

  Thereafter, when a permission signal is input from the car navigation system 40 to the information extraction unit 16 of the mobile phone 10, the information extraction unit 16 establishes a communication connection with another communication partner terminal in addition to the above-described processing. An instruction signal is generated and output to the signal generation unit 13. Thereafter, the signal generation unit 13 reads the second connection address “connection address 3” from the authentication information storage unit 11 based on the instruction signal input from the information extraction unit 16 (sequential reading). Subsequently, the signal generator 13 generates a search signal including the connection address of the PDA 50 and outputs the search signal to the transmitter 14.

  Thereafter, when a permission signal is input from the PDA 50 to the information extraction unit 16 of the mobile phone 10, the information extraction unit 16 generates an instruction signal for establishing a communication connection with another communication partner terminal and sends it to the signal generation unit 13. Output. The signal generation unit 13 reads the third connection address “connection address 4” from the authentication information storage unit 11 based on the instruction signal, and outputs a search signal including the connection address to the transmission unit 14.

  Thereafter, when a permission signal is input from the wireless earphone 60 to the information extraction unit 16 of the mobile phone 10, the connection unit 17 establishes a communication connection with the wireless earphone 60. Then, the connection unit 17 notifies other functional components such as a user interface and a predetermined application program (both not shown) that processing of communication connection with the car navigation system 40, the PDA 50, and the wireless earphone 60 has been completed. To do.

  When the mobile phone 10 fails to search for a communication partner terminal, a search determination unit (not shown) that determines whether the search has succeeded establishes a communication connection with another communication partner terminal. The instruction signal is generated and output to the signal generation unit 13. The failure to search for a communication partner terminal means that the receiving unit 15 does not receive a response signal corresponding to the search signal even if a predetermined time has elapsed since the transmission unit 14 transmitted the search signal. . In this case, the mobile phone 10 ends the connection process for the communication partner terminal that has failed in the search. For this purpose, the mobile phone 10 includes a timer (not shown) that measures the time from when the search signal is transmitted until the response signal is received. This timer may be included in a search determination unit (not shown), or may be provided separately from the search determination unit.

  Next, the processing of the communication system 1 shown in FIG. 1 and the communication connection method according to this embodiment will be described with reference to FIGS. FIG. 6 is a sequence diagram showing processing of the communication system 1. FIG. 7 is a flowchart showing details of the PIN comparison process shown in FIG.

  First, when the signal generation unit 13 of the cellular phone 10 receives an input of an instruction signal indicating a communication connection instruction, the signal generation unit 13 reads a connection address from the authentication information storage unit 11 (step S11), and the read connection address A search signal including (destination connection address) is generated. Subsequently, the transmission unit 14 transmits the generated search signal to the counterpart device 20 (step S12).

  Subsequently, the receiving unit 23 of the counterpart device 20 receives the search signal, and the information extraction unit 24 extracts the counterpart connection address included in the search signal. Subsequently, the search determination unit 25 determines whether or not the partner connection address matches the connection address of the partner device 20 stored in the address storage unit 21 (step S13). If these two connection addresses match (step S13), the search determination unit 25 generates response information and outputs it to the signal generation unit. Subsequently, the signal generation unit 28 generates a response signal including the response information, and the transmission unit 29 transmits the generated response signal to the mobile phone 10 (step S14).

  Subsequently, the receiving unit 15 of the mobile phone 10 receives the response signal, and the information extracting unit 16 extracts the response information from the response signal. Subsequently, the signal generation unit 13 receives the response information, reads the link key and random number corresponding to the destination connection address from the authentication information storage unit 11 (step S15, transmission step), and reads the read link key and A request signal including a random number is generated. Subsequently, the transmission unit 14 transmits the generated request signal to the counterpart device 20 (step S16, transmission step).

  Subsequently, the receiving unit 23 of the counterpart device 20 receives the request signal (receiving step), and the information extracting unit 24 extracts the link key and random number included in the request signal. Subsequently, the PIN calculation unit 26 derives a PIN based on the connection address of the counterpart device 20 stored in the address storage unit 21, and the extracted link key and random number (step S17, determination step). Subsequently, the PIN determination unit 27 compares the derived PIN with the PIN stored in the PIN storage unit 22 (step S18, determination step).

  Specifically, as shown in FIG. 7, the PIN determination unit 27 compares the two PINs (step S181), and when these PINs match (step S182; YES), the signal generation unit 28 permits A signal is generated (step S183). On the other hand, if the two PINs are different (step S182; NO), the signal generator 28 generates a rejection signal (step S184).

  Returning to FIG. 6, thereafter, the transmission unit 29 transmits the generated permission signal or rejection signal to the mobile phone 10 (step S19, connection step).

  When the receiving unit 15 receives the permission signal in the mobile phone 10 (step S20; YES), the information extraction unit extracts the connection address, the link key, and the random number of the counterpart device 20 from the permission signal. Three types of information are output to the authentication information storage unit 11 and the connection unit 17. Then, the authentication information storage unit 11 stores the input authentication information, and the connection unit 17 of the mobile phone 10 establishes a communication connection with the connection unit 17 of the counterpart device 20 (step S21, connection step). Thereby, the mobile phone 10 and the counterpart device 20 can perform data communication with each other.

  On the other hand, when the reception unit 15 receives the rejection signal (step S20; NO), the connection unit 17 of the mobile phone 10 ends the connection request to the counterpart device 20.

  As described above, according to the present embodiment, if the mobile phone 10 accepts an input instructing connection with the counterpart device 20, the PIN of the user of the mobile phone 10 or the user of the counterpart device 20 is subsequently given. These communication terminals can be easily connected to each other without inputting authentication information such as, and the time required for pairing and establishment of communication connection can be shortened.

  The mobile phone 10 performs a process of searching for a communication partner terminal using a search signal and a process of requesting a communication connection using a request signal. For this purpose, the mobile phone 10 needs a connection address necessary for these processes. The link key and random number are stored in advance. Accordingly, the user of the mobile phone 10 may simply input a connection instruction or execute a predetermined application program that requires data communication in order to establish a communication connection between the mobile phone 10 and the counterpart device 20.

  On the other hand, the counterpart device 20 also stores a connection address and PIN necessary for communication connection with the mobile phone 10 in advance. Further, the counterpart device 20 performs a process of responding to the mobile phone 10 and a process of determining whether or not the communication connection is permitted by a search signal from the mobile phone 10. Therefore, the user of the counterpart device 20 does not need to perform an operation of waiting for a search or inputting a PIN in order to establish a communication connection.

  Further, in this embodiment, by transmitting the connection address of the counterpart device 20 to the counterpart device 20 in this way, a response signal is immediately acquired from the counterpart device 20 without putting the counterpart device 20 in a search waiting state. Authentication information can be sent. Therefore, the communication terminals can be more easily connected to each other, and the time required for establishing the communication connection can be further shortened.

  In the present embodiment, even when the mobile phone 10 attempts to establish a communication connection with the car navigation system 40, the PDA 50, and the wireless earphone 60, the user only has to start a connection instruction or an application program that instructs a connection once. Good. This is because the mobile phone 10 reads connection addresses of a plurality of communication partner terminals one by one, searches for communication partner terminals, and establishes a communication connection.

  Conventionally, when connecting a communication terminal and a plurality of communication partner terminals, a user of the communication terminal requesting connection has to input a search instruction for each communication partner terminal and start searching for the communication partner terminal. . In addition, the user of the communication partner terminal needs to input an instruction for putting the communication partner terminal in a search waiting state. Further, the user of the communication terminal and the user of the communication partner terminal each need to input a PIN. For this reason, it took at least about 10 seconds to finally establish a communication connection. On the other hand, in the present embodiment, as described above, it is possible to greatly reduce the input by the user and reduce the time until the connection is established.

  In the present embodiment, authentication information that has been used in other communication terminals can be received by the external interface 12 and reused in the mobile phone 10. For example, when a mobile phone is replaced, the authentication information stored in the mobile phone before replacement can be transferred to the purchased mobile phone. As a result, it is possible to easily connect the device connected to the mobile phone before replacement and the purchased mobile phone, and to reduce the time required for establishing the communication connection.

  The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above embodiment. The present invention can be modified in various ways as described below without departing from the scope of the invention.

  In the above embodiment, when the mobile phone 10 fails to search for a communication partner terminal such as the counterpart device 20, the connection process for the communication partner terminal is terminated, but the connection to the communication partner terminal that failed to search is retried. The mobile phone 10 may be configured as described.

  For this purpose, the authentication information storage unit 11 stores a record including a flag indicating completion of pairing in addition to the connection address, link key, and random number. If this flag is “1”, it indicates that pairing has been completed, and if it is “0”, it indicates that pairing has failed. Note that when the mobile phone 10 transmits a search signal to a specific communication partner terminal, the flag corresponding to the communication partner terminal is “0”. Then, when the information extraction unit 16 receives the permission signal, the information extraction unit 16 updates the flag corresponding to the communication partner terminal that has transmitted the permission signal to “1”. Thereafter, the signal generation unit 13 searches the authentication information storage unit 11 after a certain period of time, reads the connection address whose flag is “0”, and searches for the communication partner terminal identified by the connection address again. Generate a signal.

  If the mobile phone 10 is configured in this manner, the mobile phone 10 automatically reattempts pairing after a predetermined time has elapsed, so that the input load on the user of the mobile phone 10 can be further reduced.

  In the above embodiment, the authentication information received by the external interface 12 is stored in the authentication information storage unit 11. However, the authentication information storage method is not limited to this. For example, when the authentication information storage unit 11 of the mobile phone 10 does not store authentication information corresponding to the counterpart device 20, in other words, when the mobile phone 10 and the counterpart device 20 are connected for the first time, the mobile phone 10 and the counterpart device 20 are connected. Are connected by a conventional method in which PINs need to be exchanged with each other. When the authentication is successful, the counterpart device 20 transmits the connection address of the own device, the link key generated at the time of authentication, and the random number used when generating the link key to the mobile phone 10. The authentication information storage unit 11 stores the connection address, link key, and random number. In other words, the authentication information storage unit 11 stores a link key based on the PIN input at the partner device 20 when it is first connected to the partner device 20.

  As a result, the mobile phone 10 can reuse the authentication information used when the connection succeeds when reconnecting to the counterpart device 20 once successfully connected. As a result, the mobile phone 10 and the counterpart device 20 can be easily connected, and the time required for establishing a communication connection can be shortened.

  Moreover, in the said embodiment, although the authentication information storage part 11 stored the link key and the random number, it may replace with these authentication information and may store PIN. In this case, the request signal transmitted from the mobile phone 10 includes the PIN, and the communication partner terminal such as the partner device 20 compares the PIN extracted from the signal with the PIN stored in the PIN storage unit 22. To determine whether the connection is permitted or not. This eliminates the need for the PIN calculation unit 26 to derive the PIN, further reducing the time required for determining whether to permit the connection and further simplifying the configuration of the communication partner terminal such as the partner device 20. become.

  In the above embodiment, the mobile phone 10 and the counterpart device 20 are cited as communication terminals, but the types of communication terminals are not limited. Further, both the function of the mobile phone 10 and the function of the counterpart device 20 may be mounted on one communication terminal so that one communication terminal can execute a pairing request and accept the request.

  Moreover, in the said embodiment, although the mobile telephone 10 and the other party apparatus 20 were mutually connected using Bluetooth, this invention is applicable also when using another near field communication system.

It is a figure which shows the whole structure of a communication system. It is a figure which shows the hardware constitutions of the mobile telephone shown by FIG. It is a figure which shows the structure of the authentication information storage part shown by FIG. It is a hardware block diagram of the other party apparatus shown by FIG. FIG. 2 is a diagram showing a state in which the mobile phone shown in FIG. 1 is connected to a plurality of communication partner terminals. It is a sequence diagram which shows the process of a communication system. 7 is a flowchart showing details of a PIN comparison process shown in FIG. 6.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Communication system, 10 ... Mobile telephone (communication terminal, communication partner terminal), 11 ... Authentication information storage part (request side database), 13 ... Signal generation part (request side transmission means), 14 ... Transmission part (request side transmission) Means), 15 ... receiving unit (requesting side receiving unit), 16 ... information extracting unit, 17 ... connecting unit (requesting side connecting unit), 20 ... partner device (communication terminal, communication partner terminal), 21 ... address storage unit, DESCRIPTION OF SYMBOLS 22 ... PIN storage part (authentication side database), 23 ... Reception part (authentication side reception means), 24 ... Information extraction part, 25 ... Search determination part, 26 ... PIN calculation part (determination means), 27 ... PIN determination part ( Determination means), 28 ... Signal generation unit (authentication side connection means), 29 ... Transmission unit (authentication side connection means), 30 ... Connection unit (authentication side connection means), 40 ... Car navigation system (communication partner terminal), 50 ... PDA (communication partner End), 60 ... wireless earphone (communication partner terminal)

Claims (8)

A link key generated at the communication partner terminal and a random number used when generating the link key for establishing a communication connection by short-range wireless communication with the communication partner terminal that is the communication partner are stored in advance. A requesting database,
Request side transmission means for transmitting the link key and the random number stored in the request side database to the communication partner terminal;
A request side receiving means for receiving a permission signal transmitted from the communication counterpart terminal in response to transmission of the link key and the random number by the request side transmitting means, and indicating permission of communication connection;
Request side connection means for establishing a communication connection with the communication partner terminal based on the permission signal received by the request side reception means;
Equipped with a,
The communication partner terminal is stored in the communication partner terminal in advance, and a password derived based on the connection address for identifying the communication partner terminal, the link key and the random number transmitted by the request side transmission unit, and Comparing the passwords that match, and if these passwords match, send the permission signal,
A communication terminal characterized by that. The requesting database further stores in advance the connection address identifying the communication partner terminal,
The link key after the request side transmission means transmits the connection address stored in the request side database to the communication counterpart terminal and receives a response signal transmitted from the communication counterpart terminal in response to the transmission And transmitting the random number to the communication partner terminal,
The communication terminal according to claim 1. The link key and the random number stored in the requesting database generate a link key based on the password entered at the communication partner terminal when the communication partner terminal is first connected , and the link key Is a random number used when
The communication terminal according to claim 1 or 2. Authentication information receiving means for receiving a link key stored in a database of another communication terminal and a random number used when generating the link key ;
The link key and the random number stored in the requesting database, which is the link key and the random number received by the authentication information receiving means,
The communication terminal according to claim 1 or 2. A communication terminal that communicates with a communication partner terminal that is a communication partner,
An authentication side database that stores in advance the personal identification number for establishing a communication connection by short-range wireless communication with the communication partner terminal,
Authentication-side receiving means for receiving a link key and a random number for deriving the personal identification number from the communication partner terminal;
The personal identification number derived based on the connection address for identifying the communication terminal, the link key and the random number received by the authenticating receiving means match the personal identification number stored in the authenticating database. whether determined, if these identification numbers match, a determination unit that communication connection with the communication partner terminal,
When it is determined by the determination means to establish communication connection with the communication partner terminal, the communication partner terminal transmits a permission signal indicating permission of communication connection to the communication partner terminal. An authenticator connection means for establishing a connection with the terminal;
A communication terminal comprising: A communication system comprising a communication terminal and a communication partner terminal serving as a communication partner of the communication terminal,
The communication terminal is
A link key generated at the communication partner terminal and a random number used when generating the link key for establishing a communication connection by short-range wireless communication with the communication partner terminal that is the communication partner are stored in advance. A requesting database and
Request side transmission means for transmitting the link key and the random number stored in the request side database to the communication partner terminal;
A request side receiving means for receiving a permission signal transmitted from the communication counterpart terminal in response to transmission of the link key and the random number by the request side transmitting means, and indicating permission of communication connection;
Request side connection means for establishing a communication connection with the communication partner terminal based on the permission signal received by the request side reception means;
With
The communication partner terminal is
An authentication side database that pre-stores a password for establishing a communication connection by short-range wireless communication with the communication terminal;
An authentication side receiving means for receiving the link key and the random number transmitted by the request side transmitting means;
The personal identification number derived based on the connection address for identifying the communication partner terminal and the link key and the random number received by the authenticating receiving means match the personal identification number stored in the authenticating database. whether determined to, if these identification numbers match, with the communication terminal determining means that the communication connection,
When it is determined by the determination means that the communication connection with the communication terminal is established, the connection with the communication terminal is transmitted by transmitting to the communication terminal a permission signal indicating that the communication connection is permitted to the communication terminal. An authenticator connection means for establishing
Comprising
A communication system characterized by the above. A link key generated at the communication partner terminal and a random number used when generating the link key for establishing a communication connection by short-range wireless communication with the communication partner terminal that is the communication partner are stored in advance. A communication connection method in a communication terminal comprising a requesting database,
Said communication terminal, and requesting transmission step of transmitting the link key and the random number stored in the requesting database to the communication partner terminal,
A request side receiving step for receiving a permission signal indicating that the communication terminal permits communication connection, transmitted from the communication counterpart terminal in response to transmission of the link key and the random number in the request side transmission step;
A request side connection step in which the communication terminal establishes a communication connection with the communication partner terminal based on the permission signal received in the request side reception step;
Only including,
The communication partner terminal is stored in advance in the communication partner terminal, the PIN derived based on the connection address for identifying the communication partner terminal, the link key and the random number transmitted in the request side transmission step, and Comparing the passwords that match, and if these passwords match, send the permission signal,
A communication connection method. A communication connection method in a communication terminal including an authentication database that stores in advance a personal identification number for establishing a communication connection by short-range wireless communication with a communication partner terminal that is a communication partner,
An authentication-side receiving step in which a communication terminal receives a link key and a random number for deriving the personal identification number from the communication counterpart terminal;
Said communication terminal, a personal identification number which is derived based on said link key and the random number received in the authentication side receiving step connection address identifying the communication terminal, the personal identification stored in the authentication-end database It determines whether numbers and matches, if these identification numbers match, a determination step that the communication connection with the communication partner terminal,
When it is determined that the communication terminal establishes a communication connection with the communication partner terminal in the determination step, a permission signal indicating permission of the communication connection to the communication partner terminal is transmitted to the communication partner terminal. And an authentication side connection step for establishing a connection with the communication partner terminal,
A communication connection method comprising:

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