JP2007243240A - Wireless authentication system, mobile unit, wireless key, and wireless authentication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless authentication system, a mobile unit, a wireless key, and a wireless authentication method, for reducing the power consumption at authentication processing and suppressing wireless interference with another system by properly making an authentication monitor period between the mobile unit and the wireless key revisable depending on a reception level. <P>SOLUTION: A transmission timing control section 1071 controls revision of a transmission period timing of a wireless authentication command group and interruption of an authentication operation or the like for both its own unit 100 and the wireless key 200 on the basis of an operating state discrimination result received from a mobile unit state discrimination section 103, a recognition result received from a command recognition section 1073, and a comparison result received from a reception level discrimination section 1074 or the like. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless authentication system, a wireless authentication device, and a wireless authentication method, and more particularly to a wireless authentication system, a mobile device, a wireless key, and a wireless authentication method for performing wireless authentication processing with a mobile communication terminal device.

  Conventionally, household appliances are increasingly using wireless remote control devices that enable remote operation. For this reason, there are a plurality of wireless remote control devices (hereinafter referred to as remote control devices) for each household electrical appliance in the home, and the storage thereof becomes complicated and the number of situations where the remote control device is lost is increasing.

  In order to avoid such a situation, for example, a wireless remote control device search method described in Patent Document 1 has been proposed. In this search method, a search signal is generated from the electronic device, and the generation interval of the search signal of the electronic device is controlled in accordance with the received electric field strength of the response signal returned from the wireless remote control device. Can be searched with low power consumption.

Further, as a method for proposing similar techniques, for example, there is a wireless key authentication method described in Patent Document 2. In this authentication method, battery consumption in the wireless key is reduced by transmitting / receiving an authentication signal in which a code length corresponding to each operation mode is set between the wireless key and the main body side device.
JP 2002-135869 A JP 2004-143806 A

  However, in the wireless remote control device search method of Patent Document 1, since the search signal generation interval is controlled according to the received electric field strength, for example, the search signal generation interval is set short and the electronic device and the wireless remote control device are connected. Although the responsiveness can be improved by shortening the authentication period, the problem arises that the power consumption increases and the standby time of the wireless remote control device is shortened.

  In the wireless key authentication method disclosed in Patent Document 2, an authentication signal in which a code length corresponding to each operation mode is set is transmitted and received between the wireless key and the main body side device. When there are a plurality of systems and each device is dense, radio interference occurs between the systems.

  The present invention has been made in view of such a point, and the authentication monitoring cycle between the mobile device and the wireless key can be appropriately changed according to the reception level, thereby reducing the power consumption during the authentication process and other systems. An object of the present invention is to provide a wireless authentication system, a mobile device, a wireless key, and a wireless authentication method for suppressing wireless interference.

  The wireless authentication system of the present invention is a wireless authentication system that performs mutual authentication by wireless communication between a mobile device and a wireless key, and the mobile device performs first wireless communication with the wireless key. A radio communication unit, a reception level determination unit that determines a reception level of a signal received from the wireless key, and a transmission cycle change by changing a setting of a transmission cycle of a signal related to mutual authentication based on the determination result of the reception level Transmission period control means for transmitting a signal with added information by the first wireless communication means, and the wireless key is a second wireless communication means for performing wireless communication with the mobile device; Transmission cycle control means for changing the setting of the transmission cycle of the signal related to mutual authentication according to the transmission cycle change information added to the signal received from the mobile device. A configuration that.

  According to this configuration, the authentication monitoring period between the mobile device and the wireless key can be changed as appropriate according to the reception level, and power consumption during authentication processing can be reduced and radio interference with other systems can be suppressed.

  The wireless authentication system of the present invention is the wireless authentication system according to claim 1, wherein the transmission cycle control means of the mobile device transmits the signal with the transmission cycle change information added thereto, and then transmits the signal from the wireless key. A configuration is adopted in which the setting of the transmission cycle of the signal related to the mutual authentication is changed after receiving a response to the signal.

  According to this configuration, it is possible to synchronize the timing for changing the authentication monitoring period between both the mobile device and the wireless key.

  The wireless authentication system according to the present invention is the wireless authentication system according to claim 1, wherein the mobile device includes a state determination unit that determines an operation state of the mobile device, and the transmission cycle control unit includes the state determination unit. According to an operation state determination result by the means, transmission of the signal related to the mutual authentication is interrupted, and a signal to which authentication operation interruption information is added is transmitted by the first wireless communication means.

  According to this configuration, the authentication operation can be interrupted as appropriate according to the operating state of the mobile device, and the power consumption of the mobile device can be reduced.

  The wireless authentication system of the present invention is the wireless authentication system according to claim 3, wherein the transmission cycle control means of the mobile device transmits the signal with the authentication operation interruption information added thereto, and then transmits the signal from the wireless key. A configuration is adopted in which transmission of a signal related to the mutual authentication is interrupted after receiving a response to the signal.

  According to this configuration, it is possible to synchronize the interruption of the authentication operation at all times with both the mobile device and the wireless key.

  The wireless authentication system according to the present invention is the wireless authentication system according to claim 1 or 3, wherein the mobile device includes signal generation means for generating the transmission cycle change information added to the signal or the authentication operation interruption information. The structure to comprise is taken.

  According to this configuration, it is possible to create information for appropriately changing the authentication monitoring period between the mobile device and the wireless key according to the reception level.

  The wireless authentication system according to the present invention is the wireless authentication system according to claim 1, wherein the wireless key includes reception level determination means for determining a reception level of a signal received from the mobile device, and the transmission cycle control. The means changes the setting of the transmission cycle of the signal related to mutual authentication based on the determination result of the reception level, transmits the signal added with the transmission cycle change information by the second wireless communication means, and then performs the mutual authentication. A configuration is adopted in which the setting of the transmission cycle of the related signal is changed.

  According to this configuration, the authentication monitoring period between the mobile device and the wireless key can be changed as appropriate according to the reception level, and power consumption during authentication processing can be reduced and radio interference with other systems can be suppressed.

  The wireless authentication system according to the present invention is the wireless authentication system according to claim 1 or 6, wherein the wireless key includes signal generation means for generating the transmission cycle change information added to the signal or the authentication operation interruption information. The structure to comprise is taken.

  According to this configuration, it is possible to appropriately change the authentication monitoring cycle between the mobile device and the wireless key in accordance with the reception level, and to create information that always interrupts the authentication operation.

  The mobile device of the present invention is a mobile device that performs mutual authentication with a wireless key by wireless communication, and includes a first wireless communication unit that performs wireless communication with the wireless key, and the wireless key. A reception level determination means for determining a reception level of a signal received from the receiver, a setting of a transmission cycle of a signal related to mutual authentication based on a determination result of the reception level, and a signal with transmission cycle change information added thereto And a transmission cycle control means for transmitting by one wireless communication means.

  According to this configuration, the authentication monitoring period between the mobile device and the wireless key can be changed as appropriate according to the reception level, and power consumption during authentication processing can be reduced and radio interference with other systems can be suppressed.

  The wireless key of the present invention is a wireless key for performing mutual authentication with a mobile device by wireless communication, wherein the second wireless communication means for performing wireless communication with the mobile device, and the mobile device A reception level determination means for determining a reception level of a signal received from the receiver, a setting of a transmission cycle of a signal related to mutual authentication based on a determination result of the reception level, and a signal with transmission cycle change information added thereto And a transmission cycle control means for transmitting by two wireless communication means.

  According to this configuration, the authentication monitoring period between the mobile device and the wireless key can be changed as appropriate according to the reception level, and power consumption during authentication processing can be reduced and radio interference with other systems can be suppressed.

  The wireless authentication method of the present invention is a wireless authentication method in which mutual authentication is performed by wireless communication between a mobile device and a wireless key, and the mobile device determines a reception level of a signal received from the wireless key. A reception level determination step, and, in the mobile device, a setting of a transmission cycle of a signal related to mutual authentication is changed based on a determination result of the reception level, and a signal to which transmission cycle change information is added is a first wireless communication unit And a transmission cycle control for changing a setting of a transmission cycle of a signal related to mutual authentication according to the transmission cycle change information added to a signal received from the mobile device in the wireless key. Steps.

  According to this method, the authentication monitoring period between the mobile device and the wireless key can be changed as appropriate according to the reception level, and power consumption during authentication processing can be reduced and radio interference with other systems can be suppressed.

  According to the present invention, the authentication monitoring cycle between the mobile device and the wireless key can be appropriately changed according to the reception level, and the power consumption during the authentication process can be reduced and the radio interference with other systems can be suppressed.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of a wireless authentication system according to an embodiment to which the present invention is applied. In FIG. 1, a wireless authentication system 10 includes a mobile phone 100 that implements a wireless authentication function and a wireless key 200 that implements a wireless authentication function. The two circles shown in the figure indicate the communication area in which the authentication operation can be periodically performed between the mobile phone 100 and the wireless key 200, and the inner circle indicates that the authentication operation cycle is 4 seconds (s). The range and the outer circle indicate that the monitoring period of the authentication operation is in the range of 2 seconds (s). The outside of the two circles is outside the communication range where the authentication operation between the mobile phone 100 and the wireless key 200 is impossible. 1 is determined based on a reception level of a command received by the wireless key 200 from the mobile phone 100. In FIG. The value of the authentication operation cycle is merely an example, and is not limited to these values.

  In FIG. 1, it is assumed that the mobile phone 100 is mounted with a wireless authentication module “T-MTC”, and the wireless key 200 is also mounted with a wireless authentication module “K-MTC”.

  In the wireless authentication system 10 of the present embodiment, the mobile phone 100 or the wireless key 200 is left unattended when the wireless authentication modules repeatedly perform an authentication operation between the mobile phone 100 and the wireless key 200. The security function is provided such as limiting the function of the mobile phone 100 when one of them is out of the communication range.

  Next, the internal configuration of the mobile phone 100 will be described with reference to the block diagram shown in FIG. In FIG. 2, a mobile phone 100 includes a mobile communication antenna 101, a wireless communication unit 102, a transfer device state determination unit 103, an operation unit 104, a display unit 105, an ID storage unit 106, and a wireless authentication control unit. 107, a transmission unit 108, a reception unit 109, and a wireless authentication antenna 110.

  In accordance with various operation signals input from the operation unit 104, the wireless communication unit 102 performs a mobile communication procedure, a call signal, and the like with the other party mobile phone via the mobile communication antenna 101 and a mobile communication network (not shown). The mobile communication process to transmit / receive is executed. In addition, the wireless communication unit 102 outputs a display signal indicating an operation state or a communication state related to communication processing to the display unit 105, and outputs a communication state signal indicating the communication processing state to the transfer device state determination unit 103.

  The mobile device state determination unit 103 determines the operation state of the mobile phone 100 based on the communication state signal input from the wireless communication unit 102, the operation signal input from the operation unit 104, and the display signal input from the display unit 105. The determination result is output to the wireless authentication control unit 107.

  The operation unit 104 includes a power key, a numeric keypad, various function keys, and the like, and outputs an operation signal for each key to the wireless communication unit 102 and the mobile device state determination unit 103.

  The display unit 105 is configured by a liquid crystal display panel or the like, and displays an operation state and a communication state related to communication processing by a display signal from the wireless communication unit 102, and displays a display signal indicating the display state to the transfer machine state determination unit 103 Output.

  The ID storage unit 106 stores manufacturing-time ID information Mt of the wireless authentication module “T-MTC” shown in FIG. 1 and search SKID information for searching for the wireless key 200 paired with the mobile phone 100. .

  The wireless authentication control unit 107 includes a transmission timing control unit 1071, a command creation unit 1072, a command recognition unit 1073, and a reception level determination unit 1074.

  The transmission timing control unit 1071 is based on the operation state determination result input from the mobile device state determination unit 103, the recognition result input from the command recognition unit 1073, the comparison result input from the reception level determination unit 1074, and the like. It controls the change of the transmission cycle timing of the wireless authentication command group for both the device 100 and the wireless key 200, the interruption of the authentication operation, and the like. The transmission timing control unit 1071 has a function as a transmission cycle control unit.

  The command creation unit 1072 creates a command for performing wireless authentication with the wireless key 200 and outputs the command to the transmission timing control unit 1071. The specific configuration of the command will be described later. The command creation unit 1072 has a function as signal creation means.

  The command recognition unit 1073 recognizes the content of a response command (response) for wireless authentication received from the wireless key 200 and outputs the recognition result to the transmission timing control unit 1071.

  The reception level determination unit 1074 compares the reception level of the response command (response) for wireless authentication received from the wireless key 200 with a preset threshold value, and outputs the comparison result to the transmission timing control unit 1071.

  The transmission unit 108 has a wireless transmission function for transmitting a wireless authentication command group to the wireless key 200, and wirelessly transmits the wireless authentication command group input from the wireless authentication control unit 107 from the antenna 110.

  The reception unit 109 has a wireless reception function for receiving a wireless authentication command group from the wireless key 200, receives a wireless authentication command group transmitted from the wireless key 200 from the antenna 110, and receives a wireless authentication control unit. It outputs to 107. Note that the transmission unit 108 and the reception unit 109 have a function as a wireless communication unit.

  Therefore, in the above configuration of the mobile phone 100, the ID storage unit 106, the wireless authentication control unit 107, the transmission unit 108, the reception unit 109, and the antenna 110 constitute a wireless authentication module “T-MTC”.

  Next, the configuration of the wireless authentication module “K-MTC” mounted on the wireless key 200 will be described with reference to the block diagram shown in FIG. In FIG. 3, the wireless authentication module “K-MTC” mounted on the wireless key 200 includes an antenna 201, a transmission unit 202, a reception unit 203, an ID storage unit 204, and a wireless authentication control unit 205. Is done.

  The transmission unit 202 has a wireless transmission function for wirelessly transmitting a wireless authentication command group to the mobile phone 100, and wirelessly transmits the wireless authentication command group input from the wireless authentication control unit 205 from the antenna 201. .

  The reception unit 203 has a wireless reception function for receiving a wireless authentication command group from the mobile phone 100, and receives a wireless authentication command group wirelessly transmitted from the mobile phone 100 from the antenna 201 to receive a wireless authentication control unit. It outputs to 205. Note that the transmission unit 202 and the reception unit 203 have a function as a wireless communication unit.

  The ID storage unit 204 stores manufacturing-time ID information Mk of the wireless authentication module “K-MTC”, search STID information for searching for the mobile phone 100 paired with the wireless key 200, and the like.

  The wireless authentication control unit 205 includes a transmission timing control unit 2051, a command creation unit 2052, a command recognition unit 2053, and a reception level determination unit 2054.

  The transmission timing control unit 2051 is based on the recognition result input from the command recognition unit 2053, the comparison result input from the reception level determination unit 2054, the extension bit added to the wireless authentication command received from the mobile phone 100, and the like. In addition, it controls the change of the transmission cycle timing of the wireless authentication command group for both the own key 200 and the mobile phone 100, interruption of the authentication operation, and the like. The transmission timing control unit 2051 has a function as a transmission cycle control unit.

  The command creation unit 2052 creates a command for performing wireless authentication with the mobile phone 100 and outputs the command to the transmission timing control unit 2051. The specific configuration of the command will be described later.

  The command recognition unit 2053 recognizes the content of the authentication command (challenge) for wireless authentication received from the mobile phone 100 and outputs the recognition result to the transmission timing control unit 2051.

  Reception level determination unit 2054 compares the reception level of the authentication command (challenge) for wireless authentication received from mobile phone 100 with a preset threshold value, and outputs the comparison result to transmission timing control unit 2051.

  The wireless communication method used when the wireless authentication operation is performed between the mobile phone 100 and the wireless key 200 is not particularly limited, and the wireless authentication processing function of the present embodiment can be exhibited. Anything is applicable.

  Next, a basic operation of the wireless authentication process in the wireless authentication system 10 of the present embodiment will be described with reference to a ladder chart shown in FIG.

  In FIG. 4, when the wireless key 200 is turned on, the wireless authentication control unit 205 operates in the search mode, and the manufacturing time ID stored in the ID storage unit 204 is searched to search for the mobile phone 100 that forms a pair. Search ID information SKID is generated using information Mk, and a search SKID command in which this SKID is set is created and transmitted from transmission section 202 (step S1).

  When the mobile phone 100 is turned on, the wireless authentication control unit 107 operates in a standby mode waiting for a search SKID command. When the mobile phone 100 receives a search SKID command, the mobile phone 100 reads the SKID from the command and stores it in the ID storage unit 106. It is confirmed that the wireless key 200 is paired by matching with the stored SKID information. After this confirmation, the wireless authentication control unit 107 generates a search ID information STID using the manufacturing-time ID information Mt stored in the ID storage unit 106, and creates a search STID command in which this STID is set. It transmits from the transmission part 108 (step S2).

  Next, when receiving the search STID command, the wireless authentication control unit 205 of the wireless key 200 reads the STID from the command, and the mobile phone 100 paired with the STID information stored in the ID storage unit 204 matches the STID information. Make sure that there is. After this confirmation, the wireless authentication control unit 205 reads the manufacturing time ID information Mk from the ID storage unit 204, creates an Mk command, and transmits it from the transmission unit 202 (step S3).

  Next, when receiving the Mk command, the wireless authentication control unit 107 of the mobile phone 100 confirms the wireless authentication module K-MTC mounted on the wireless key 200 based on the manufacturing-time ID information Mk set in the Mk command, and stores the ID. The manufacturing-time ID information Mt is read from the unit 106, an Mt command is created, and is transmitted from the transmitting unit 108 (step S4).

  Next, when receiving the Mt command, the wireless authentication control unit 205 of the wireless key 200 confirms that the mobile phone 100 is paired with the set ID information Mt, and shifts to the authentication mode.

  Here, the respective configurations of the Mk command and the Mt command are shown in FIGS. As shown in FIG. 5A, the Mk command includes a 31-bit “module-specific code” for setting an M-sequence signal corresponding to the operation mode of the wireless authentication module mounted on the wireless key 200, and the operation mode ( The search mode, the authentication mode, and the extended mode) are configured by a “Mode bit” having a 3-bit configuration, and a “Mk” having a 64-bit configuration by which the manufacturing-time ID information Mk is set.

  Further, as shown in FIG. 5B, the Mt command is a 31-bit “module-specific code” that sets an M-sequence signal corresponding to the operation mode of the wireless authentication module mounted on the mobile phone 100, and the above Are composed of a “Mode bit” having a 3-bit configuration for setting the same operation mode and “Mt” having a 64-bit configuration for setting the manufacturing-time ID information Mt.

  In the present embodiment, by setting an extension bit (111) in the “Mode bit”, an extension bit having an 8-bit configuration can be added to a challenge command and a response command, which will be described later, and the mobile phone 100 and the wireless key 200 are added. It is characterized in that it is possible to change the cycle timing of wireless authentication communication by transmitting / receiving extension bits between them.

  Returning to FIG. 4, when the operation of the search mode shown in steps S1 to S4 is completed, both the mobile phone 100 and the wireless key 200 shift to the authentication mode.

  The wireless authentication control unit 205 of the wireless key 200 creates a challenge request command for making an authentication request and transmits it from the transmission unit 202 (step S5). When receiving the challenge request command, the wireless authentication control unit 107 of the mobile phone 100 recognizes that the request is an authentication request and creates an authentication challenge command in which the generated random number (the number of challenges) is set in order to respond to the command. Then, the data is transmitted from the transmission unit 108 (step S6).

  Next, when receiving the authentication challenge command, the wireless authentication control unit 205 of the wireless key 200 generates a response command in which response data in which a random number set in the command is encrypted with a predetermined encryption function is set, and a transmission unit It transmits from 202 (step S7). When the wireless authentication control unit 107 of the mobile phone 100 receives the response command, the wireless authentication control unit 107 decrypts the response data set in the command with a decryption function and confirms the match with the previously generated random number, thereby determining the wireless key 200. Authentication is performed, and a response response command is generated and transmitted from the transmission unit 108 (step S8).

  Further, if the random number decrypted from the response data received from the wireless key 200 does not match, the wireless authentication control unit 107 of the mobile phone 100 is locked in the mobile phone function and its use is restricted.

  As described above, when the mobile phone 100 or the wireless key 200 is left or stolen somewhere by repeatedly executing the above basic operation between the mobile phone 100 and the wireless key 200, the device The function is locked to restrict its use.

  Next, a specific example of basic operations executed between the mobile phone 100 and the wireless key 200 is shown in FIG. FIG. 6A is a timing chart showing transmission (TX) and reception (RX) operations on the mobile device side, that is, the mobile phone 100 side, and FIG. 6B shows the key side, that is, wireless. It is a timing chart which shows each operation | movement of transmission (TX) and reception (RX) by the side of the key 200.

  In FIGS. 6A and 6B, the commands transmitted / received in each operation mode are indicated by □, and the transmission / reception timings of the commands are shown to be synchronized. 6A and 6B, when the mobile phone 100 and the wireless key 200 shift to the authentication mode, “response transmission from key” and “response transmission from mobile device” are performed a specified number of times (for example, 5 ) After repeated execution, it shows the case of starting with “send challenge request” and “send authentication challenge”. The operation pattern in this basic operation is merely an example, and the operation order is not different, but the number of repetitions is not limited.

  Also, as shown in the figure, the shortest repetition period of the periodic challenge and response in the authentication mode is 100 msec.

  Next, when the extension bit (111) is set in the “Mode bit”, each command of a challenge request, an authentication challenge, a response, and a response response transmitted / received between the mobile phone 100 and the wireless key 200 in the authentication mode is used. The configuration of the extension data to be added will be described with reference to FIGS.

  In FIG. 7, (a) is a diagram showing the configuration of the challenge request command when extended and normal, (b) is a diagram showing the configuration of the authentication challenge command when extended and normal, and (c) is the response command extended. The figure which shows the structure at the time and normal time, (d) is a figure which shows the structure at the time of expansion of a response response command, and normal time.

  In each command shown in FIGS. 7A to 7D, the normal configuration in which the extension bit (111) is not set in the “Mode bit” is shown on the lower side, and the extension bit (111) is shown in the “Mode bit”. A configuration in which extension data “Data” having an 8-bit configuration is added at the time of extension for which () is set is shown on the upper side.

  Next, FIG. 8 shows a specific example of the setting contents in the extension data “Data” shown in FIGS.

  As shown in FIG. 8, seven patterns of control information are set using the lower 4 bits of the extension data “Data” having an 8-bit configuration. When “0, 1” is set in 2 bits of bit numbers 2 and 1 shown in the figure, the transmission side is “period switching request” and the reception side is “frequency switching response”. Further, when “1,0” is set in the same two bits, the transmission side becomes “interrupt request” and the reception side becomes “interrupt response”.

  Furthermore, when “0, 0” is set in the 2 bits of bit numbers 4 and 3 shown in the figure, the transmitting side becomes “period switching request to period pattern 1”, and the receiving side receiving this request requests The period switching is effective only at the time of response. In addition, when “0, 1” is set in the same 2 bits, the transmission side becomes “period switching request to period pattern 2”, and the period switching is effective only at the time of request response on the receiving side receiving this request. It becomes. If the same 2 bits are set to “1, 0”, the transmitting side becomes “period switching request to period pattern 3”, and the period switching is effective only at the time of request response at the receiving side that receives this request. It becomes. Furthermore, when “1, 1” is set in the same 2 bits, the transmitting side becomes “period switching request to period pattern 4”, and the period switching is effective only at the time of request response on the receiving side that receives this request. It becomes.

  Next, the operation of changing the transmission cycle timing in the authentication mode in the wireless authentication system 10 will be described with reference to the flowcharts shown in FIGS.

  FIG. 9 is a flowchart showing a transmission cycle timing changing process executed in the mobile phone 100, and FIG. 10 is a flowchart showing a transmission cycle timing changing process executed in the wireless key 200.

  Before starting the transmission timing changing process, as described in the basic operation, the extension bit (111) is set in the “Mode bit” of the Mt command transmitted from the mobile phone 100. In the wireless key 200, it is assumed that the extension data added to the command received in the authentication mode is confirmed to be valid by receiving the extension bit (111).

  In FIG. 9, the wireless authentication control unit 107 of the mobile phone 100 measures the reception level of the challenge request command received from the wireless key 200 (step S101), and the measured reception level is stored in advance by the reception level determination unit 1074. It is determined whether or not the reception level is equal to or higher than the threshold (step S102).

  When the wireless authentication control unit 107 determines that the reception level is equal to or higher than the threshold (step S102: YES), the wireless authentication control unit 107 calculates transmission cycle timing according to the reception level (step S103). Next, the wireless authentication control unit 107 generates and transmits an authentication challenge command in which extended data in which “0, 1 (period switching request)” is added to the two bits of bit numbers 2 and 1 shown in FIG. It transmits from the part 108 (step S104).

  Here, the process proceeds to the wireless key 200 of FIG. In FIG. 10, when the wireless authentication control unit 205 of the wireless key 200 receives the authentication challenge command to which the extended data in which “0, 1 (period switching request)” is added (step S <b> 201), “ Whether the setting contents of “0, 1 (cycle switching request)” are correct or not is checked (step S202).

  When the wireless authentication control unit 205 determines that the setting content of “0, 1 (cycle switching request)” is correct (step S202: OK), the wireless authentication control unit 205 calculates the transmission cycle timing (step S203). At this time, the wireless authentication control unit 205 calculates any one of the periodic patterns 1 to 4 shown in FIG.

  Then, based on the calculated periodic pattern, the wireless authentication control unit 205 sets “0, 1 (period switching response)” to 2 bits of bit numbers 2 and 1 shown in FIG. "0,0 (periodic pattern 1)", "0,1 (periodic pattern 2)", "1,0 (periodic pattern 3)" or "1,1 (periodic pattern 4)" A response command to which the extension data set with “response” is added is generated and transmitted from the transmission unit 202 (step S204).

  Next, the wireless authentication control unit 205 changes the command transmission cycle timing in the authentication mode of the own key 200 based on the calculated transmission cycle timing (step S205), and ends this processing. In step S202, when the wireless authentication control unit 205 determines that the setting content of “0, 1 (cycle switching request)” is incorrect (step S202: NG), the transmission cycle timing is not changed. This process ends.

  Here, it returns to the process of the mobile telephone 100 of FIG. In FIG. 9, the wireless authentication control unit 107 of the mobile phone 100 waits for reception of a response command to which extension data in which “periodic switching response” is set in response to transmission of the “periodic switching request” is added (step S105). When the response command is received (step S106), the correctness of the setting contents of “periodic pattern N (N: 0 to 4)” and “0, 1 (period switching response)” by the added extension data is checked (step S106). S107).

  When the wireless authentication control unit 107 determines that the setting contents of “periodic pattern N” and “0, 1 (periodic switching response)” are correct (step S107: OK), the periodic pattern N (N: 0 to 4). (Step S108), based on the calculated transmission cycle timing, the command transmission cycle timing in the authentication mode of the own device 100 is changed (step S109), and this process is terminated. .

  If the wireless authentication control unit 107 determines in step S102 that the reception level is lower than the threshold (step S102: NO), the setting contents of “periodic pattern N” and “0, 1 (period switching response)” are incorrect. If it is determined that the transmission period is determined (step S107: NG), the process ends without changing the transmission cycle timing.

  Next, a specific operation example of the transmission cycle timing change process will be described with reference to timing charts shown in FIGS.

  FIG. 11 is a timing chart showing an operation of changing the transmission cycle timing led by the mobile phone 100 in the authentication mode. (A) shows transmission (TX) and reception (RX) operations on the mobile phone 100 side which is the mobile device side, and (b) shows transmission (TX) and reception (RX) on the wireless key 200 side which is the key side. ) Shows each operation.

  In FIG. 5A, when the mobile phone 100 transmits a frequency switching request using the extended data during the authentication mode, the wireless key 200 uses the extended data after receiving the frequency switching request in FIG. After transmitting the frequency switching response, the transmission cycle timing is changed. Then, after the mobile phone 100 receives the cycle switching response, the transmission cycle timing is similarly changed. Thereafter, the mobile phone 100 and the wireless key 200 repeat the authentication command transmission / reception process in synchronization with the changed transmission cycle timing.

  In this case, the mobile phone 100 may be configured so that the transmission cycle timing set in the authentication mode is set in advance by the user. For example, an authentication cycle setting screen 300 as shown in FIG. 19 is displayed on the display unit 105 of the mobile phone 100 so that a user can select a desired authentication cycle. The authentication cycle setting screen 300 in FIG. 19 shows a case where three authentication cycles can be selected. “High cycle” in the figure is communicated at intervals of 2 seconds, “Low cycle” is communicated at intervals of 4 seconds, and “Optimal mode” is communicated at intervals of 4 seconds when the reception level is equal to or higher than the threshold (close). When the reception level is lower (far) than the threshold, it is possible to select from settings such as communication at intervals of 2 seconds. These settings are merely examples, and the setting contents are not particularly limited. If the transmission cycle timing selected by the user is set in advance on the authentication cycle setting screen 300, the transmission cycle timing is set instead of calculating the transmission cycle timing as in the transmission cycle timing changing process. You may make it operate | move so that it may switch to a period timing.

  FIG. 12 is a timing chart showing an operation of changing the transmission cycle timing led by the wireless key 200 in the authentication mode. (A) shows transmission (TX) and reception (RX) operations on the mobile phone 100 side which is the mobile device side, and (b) shows transmission (TX) and reception (RX) on the wireless key 200 side which is the key side. ) Shows each operation.

  In FIG. 5B, when the wireless key 200 transmits a frequency switching request using the extended data during the authentication mode and the transmission cycle timing is changed after the transmission, the mobile phone 100 in FIG. After transmitting the frequency switching response using the extension data after receiving the switching request, the transmission cycle timing is similarly changed. Thereafter, the mobile phone 100 and the wireless key 200 repeat the authentication command transmission / reception process in synchronization with the changed transmission cycle timing.

  As shown in FIGS. 11 and 12, in the wireless authentication system 10 according to the present embodiment, during the authentication mode, the wireless key 200 is transmitted from the mobile phone 100 side, or the wireless key 200 is transmitted to the mobile phone 100. Thus, it is possible to change the transmission cycle timing of the authentication command.

  FIG. 13 shows an operation example when the wireless key 200 does not respond to the transmission of the search SKID command in the search mode. (A) shows transmission (TX) and reception (RX) operations on the mobile phone 100 side which is the mobile device side, and (b) shows transmission (TX) and reception (RX) on the wireless key 200 side which is the key side. ) Shows each operation.

  If the wireless key 200 repeatedly transmits a search SKID command in the search mode in FIG. 5B and there is no response from the mobile phone 100 in the standby mode shown in FIG. Stop sending

  As described above, in the wireless authentication system 10 according to the present embodiment, by executing the transmission cycle timing changing process, the mobile phone 100 side transmits the wireless key 200 to the wireless key 200 according to the command reception level during the authentication mode. Alternatively, by transmitting an authentication command to which extended data for changing the transmission cycle timing is transmitted from the wireless key 200 to the mobile phone 100, the transmission cycle timing of the authentication command can be appropriately changed. Therefore, it is possible to provide a wireless authentication system that reduces power consumption in the authentication mode and suppresses wireless interference with other systems.

  Next, an operation of interrupting command transmission during the authentication mode in accordance with the operation state of the mobile phone 100 will be described with reference to the flowcharts shown in FIGS.

  FIG. 14 is a flowchart showing a transmission interruption process executed in the mobile phone 100, and FIG. 15 is a flowchart showing a transmission interruption process executed in the wireless key 200.

  Before starting the transmission interruption process, as described in the basic operation, the “Mode bit” of the Mt command transmitted from the mobile phone 100 is set with the extension bit (111). It is assumed that the wireless key 200 has confirmed that the extension data added to the command received in the authentication mode is valid by receiving the extension bit (111).

  In FIG. 14, the wireless authentication control unit 107 of the mobile phone 100 waits for reception of a challenge request command or response command after shifting to the authentication mode (step S301), and receives the challenge request command or response command (step S302). Then, the operation state determination result is acquired from the mobile device state determination unit 103 (step S303).

  Next, the wireless authentication control unit 107 determines whether or not the acquired mobile device state is a state in which a continuous authentication operation can be performed (step S304). For example, it is assumed that a state in which the wireless communication unit 102 is operating in a telephone call or data communication, a communication mode, or the like is set in advance as a condition for interrupting the authentication operation. As the interruption condition to be set, for example, the interruption may be made according to the editing state, such as during mail editing or schedule editing.

  If the wireless authentication control unit 107 determines that the state of the mobile device acquired by the above condition setting is not a state in which the continuous authentication operation may be performed (step S304: NO), the wireless authentication control unit 107 determines whether the continuous authentication operation is in an interrupted state (step S304). S305). In this case, a flag for determining the interruption state of the constant authentication operation may be prepared, and the determination may be made based on whether this flag is ON (interruption state) or OFF (always authenticating).

  If the continuous authentication operation is not suspended (step S305: NO), the wireless authentication control unit 107 sets “1, 0 (interrupt request)” in the two bits of bit numbers 2 and 1 shown in FIG. An authentication challenge command or a response response command with the extended data added is generated and transmitted from the transmission unit 108 (step S306).

  Here, the process proceeds to the wireless key 200 in FIG. In FIG. 15, the wireless authentication control unit 205 of the wireless key 200 shifts to the authentication mode and transmits a challenge request command or a response command from the transmission unit 202 (step S401), and then “1, 0 (interrupt request)”. When the authentication challenge command or the response response command to which the extension data set with is added is received (step S402), the suspended transmission cycle timing is calculated (step S403).

  Next, the wireless authentication control unit 205 generates a challenge request command or a response command in which extension data in which “1, 0 (interrupt response)” is set in the two bits of bit numbers 2 and 1 shown in FIG. After transmitting from the transmission unit 202 (step S404), based on the calculated transmission cycle timing, the transmission cycle timing of the own key 200 is changed (step S405), and this process ends.

  In this case, when the wireless key 200 receives an interruption request, it sets a transmission cycle timing set in advance, for example, a transmission cycle timing for interruption that is set to be longer than that at the time of constant authentication. You may make it transfer to the mode which only transmits a command with a period timing.

  Here, it returns to the process of the mobile telephone 100 of FIG. In FIG. 14, the wireless authentication control unit 107 of the mobile phone 100 waits for reception of the “interrupt response” in response to the “interrupt request” (step S307), and the extension data set to “1,0” (interrupt response) is added. When the received challenge request command or response command is received (step S308), the transmission of the authentication challenge command or response response command is stopped, the continuous authentication operation is stopped (step S309), and this process is terminated.

  In addition, when the wireless authentication control unit 107 determines that the mobile device state acquired in step S304 is a state in which the authentication operation can be performed at all times (step S304: YES), the continuous authentication operation is suspended in step S305. In the case (step S305: YES), the process returns to step S301.

  Next, a specific operation example of the transmission interruption process will be described with reference to timing charts shown in FIGS.

  FIG. 16 is a timing chart showing an operation of constantly interrupting / resuming authentication depending on the state and mode of the mobile phone 100 in the authentication mode. (A) shows transmission (TX) and reception (RX) operations on the mobile phone 100 side which is the mobile device side, and (b) shows transmission (TX) and reception (RX) on the wireless key 200 side which is the key side. ) Shows each operation. In this case, it is assumed that both the mobile phone 100 and the wireless key 200 are manufactured by A company.

  In FIG. 5A, when the mobile phone 100 is in an authentication mode and the operation state and the mode are not always authenticated, the mobile phone 100 transmits a suspension request using the extended data and receives a suspension response from the wireless key 200. Then, it shifts to a state where authentication is interrupted at all times. In FIG. 5B, the wireless key 200 continues to transmit the challenge request command and the response command at a constant cycle after transmitting the interruption response.

  Next, in FIG. 5A, when the mobile phone 100 is in an authentication state and the operation state and the mode are always in a state of authentication, when a challenge request command is received from the wireless key 200, the mobile phone 100 returns to the constant authentication operation. Send an authentication challenge command. Thereby, the wireless key 200 also returns to the normal authentication operation by receiving the authentication challenge command from the mobile phone 100.

  FIG. 17 is a timing chart showing an operation in which the mobile phone 100 does not receive an interruption response and does not interrupt in the authentication mode. (A) shows transmission (TX) and reception (RX) operations on the mobile phone 100 side which is the mobile device side, and (b) shows transmission (TX) and reception (RX) on the wireless key 200 side which is the key side. ) Shows each operation. In this case, it is assumed that the mobile phone 100 is manufactured by A company and the wireless key 200 is manufactured by B company.

  In FIG. 5A, when the operation state or the mode is not constantly authenticated during the authentication mode, the mobile phone 100 transmits a suspension request using the extended data. However, since the wireless key 200 in FIG. 5B is made by another company, it cannot determine the interruption request set in the received extension data, cannot send an interruption response using the extension data, and sends only a normal response. Can not. For this reason, since the mobile phone 100 cannot receive an interruption response in FIG.

  As shown in FIGS. 16 and 17, in the wireless authentication system 10 of the present embodiment, during the authentication mode, the continuous authentication operation is suspended / resumed according to the communication operation and mode of the mobile phone 100. 200 can be controlled. Therefore, it is possible to provide a wireless authentication system that appropriately reduces power consumption and suppresses wireless interference with other systems according to the operation state of the mobile phone in the authentication mode.

  An operation of thinning out the response on the mobile phone 100 side when the wireless key 200 cannot switch the transmission cycle timing will be described with reference to the timing chart shown in FIG. (A) shows transmission (TX) and reception (RX) operations on the mobile phone 100 side which is the mobile device side, and (b) shows transmission (TX) and reception (RX) on the wireless key 200 side which is the key side. ) Shows each operation.

  In FIG. 5A, since it is confirmed in advance that the wireless key 200 cannot switch the transmission cycle timing, the mobile phone 100 receives a challenge request command or response from the wireless key 200 at a certain transmission cycle in the authentication mode. Even if the command is received, the authentication challenge command or the response response command is thinned out and responded.

  With this operation, the mobile phone 100 can reduce current consumption.

  The present invention provides a wireless authentication system that appropriately changes an authentication monitoring period between a mobile device and a wireless key in accordance with a reception level, thereby reducing power consumption during authentication processing and suppressing wireless interference with other systems. Etc. are useful.

The figure which shows the structure of the radio | wireless authentication system which concerns on one embodiment of this invention FIG. 2 is a block diagram illustrating a configuration of a mobile phone according to the present embodiment. The block diagram which shows the structure of the wireless key which concerns on this Embodiment Ladder chart showing the basic operation of the wireless authentication system according to the present embodiment (A) according to the present embodiment is a diagram showing the configuration of the Mk command, (b) is a diagram showing the configuration of the Mt command (A) is a timing chart showing the basic operation on the mobile phone side, and (b) is a timing chart showing the basic operation on the wireless key side according to the present embodiment. (A) according to the present embodiment is a diagram showing a configuration of a challenge request command, (b) is a diagram showing a configuration of an authentication challenge command, (c) is a diagram showing a configuration of a response command, and (d) is a response response Diagram showing command structure The figure which shows the structure and setting content of the extension data which concern on this Embodiment The flowchart which shows the transmission cycle timing change process performed with the mobile telephone which concerns on this Embodiment The flowchart which shows a transmission cycle timing change process with the wireless key which concerns on this Embodiment (A) according to the present embodiment is a timing chart showing an example of a transmission cycle timing changing operation on the mobile phone side, and (b) is a timing chart showing an example of a transmission cycle timing changing operation on the wireless key side. (A) according to the present embodiment is a timing chart showing an example of a transmission cycle timing changing operation on the mobile phone side, and (b) is a timing chart showing an example of a transmission cycle timing changing operation on the wireless key side. (A) is a timing chart showing an example of response operation in the search mode on the mobile phone side, and (b) is a timing chart showing an example of operation in the search mode on the wireless key side according to the present embodiment. The flowchart which shows the continuous authentication interruption process performed with the mobile telephone which concerns on this Embodiment The flowchart which shows the continuous authentication interruption process performed with the wireless key which concerns on this Embodiment (A) is a timing chart showing an example of a continuous authentication interruption operation on the mobile phone side, and (b) is a timing chart showing an example of a constant authentication interruption operation on the wireless key side according to the present embodiment. (A) according to the present embodiment is a timing chart showing an example of failure of the continuous authentication interruption operation on the mobile phone side, and (b) is a timing chart showing an example of failure of the continuous authentication interruption operation on the wireless key side. (A) is a timing chart showing an example of continuous authentication thinning operation on the mobile phone side, and (b) is a timing chart showing an example of continuous authentication thinning operation on the wireless key side according to the present embodiment. The figure which shows an example of the authentication period setting screen displayed on the mobile telephone which concerns on this Embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wireless authentication system 100 Mobile phone 101,110,201 Antenna 102 Wireless communication part 103 Transfer machine state determination part 104 Operation part 105 Display part 106,204 ID memory | storage part 107,205 Wireless authentication control part 108,202 Transmission part 109,203 Reception unit 200 Wireless key 300 Authentication cycle setting screen 1071, 2051 Transmission timing control unit 1072, 2052 Command creation unit 1073, 2053 Command recognition unit 1074, 2054 Reception level determination unit

Claims (10)

A wireless authentication system that performs mutual authentication by wireless communication between a mobile device and a wireless key,
The mobile device is
First wireless communication means for performing wireless communication with the wireless key;
Reception level determination means for determining a reception level of a signal received from the wireless key;
Transmission period control means for changing the setting of the transmission period of the signal related to mutual authentication based on the determination result of the reception level, and transmitting the signal added with the transmission period change information by the first wireless communication means. And
The wireless key is
Second wireless communication means for performing wireless communication with the mobile device;
A wireless authentication system comprising: a transmission cycle control means for changing a transmission cycle setting of a signal related to mutual authentication according to the transmission cycle change information added to a signal received from the mobile device. .   The transmission cycle control means of the mobile device, after transmitting the signal with the transmission cycle change information added thereto, receives a response to the signal from the wireless key and then sets the transmission cycle of the signal related to the mutual authentication. The wireless authentication system according to claim 1, wherein the wireless authentication system is changed. The mobile device is
Comprising a state determining means for determining the operating state of the mobile device;
The transmission cycle control means interrupts transmission of signals related to the mutual authentication according to an operation state determination result by the state determination means, and transmits a signal with authentication operation interruption information added thereto by the first wireless communication means. The wireless authentication system according to claim 1, wherein:   The transmission cycle control means of the mobile device, after transmitting the signal with the authentication operation interruption information added thereto, interrupts transmission of the signal related to the mutual authentication after receiving a response to the signal from the wireless key. The wireless authentication system according to claim 3.   4. The wireless authentication system according to claim 1, wherein the mobile device includes signal generation means for generating the transmission cycle change information added to the signal or the authentication operation interruption information. The wireless key is
Comprising reception level determination means for determining a reception level of a signal received from the mobile device;
The transmission cycle control means changes the setting of the transmission cycle of the signal related to mutual authentication based on the determination result of the reception level, and transmits the signal added with the transmission cycle change information by the second wireless communication means, The wireless authentication system according to claim 1, wherein a setting of a transmission cycle of signals related to the mutual authentication is changed.   7. The wireless authentication system according to claim 1, wherein the wireless key includes a signal creating unit that creates the transmission cycle change information added to the signal or the authentication operation interruption information. A mobile device that performs mutual authentication with a wireless key by wireless communication,
First wireless communication means for performing wireless communication with the wireless key;
Reception level determination means for determining a reception level of a signal received from the wireless key;
Transmission period control means for changing the setting of the transmission period of the signal related to mutual authentication based on the determination result of the reception level, and transmitting the signal added with the transmission period change information by the first wireless communication means. A mobile device characterized by that. A wireless key that performs mutual authentication with a mobile device by wireless communication,
Second wireless communication means for performing wireless communication with the mobile device;
Reception level determination means for determining a reception level of a signal received from the mobile device;
Transmission period control means for changing the setting of the transmission period of signals related to mutual authentication based on the determination result of the reception level, and transmitting the signal added with the transmission period change information by the second wireless communication means, A wireless key characterized by A wireless authentication method for performing mutual authentication by wireless communication between a mobile device and a wireless key,
In the mobile device, a reception level determination step of determining a reception level of a signal received from the wireless key;
In the mobile device, a transmission cycle control step of changing a setting of a transmission cycle of a signal related to mutual authentication based on a determination result of the reception level and transmitting a signal added with transmission cycle change information by a first wireless communication unit When,
The wireless key includes a transmission cycle control step of changing a setting of a transmission cycle of a signal related to mutual authentication according to the transmission cycle change information added to a signal received from the mobile device. Wireless authentication method.

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