JP4889746B2 - Mobile communication device, wireless authentication system, and wireless authentication method - Google Patents

Abstract

Provided is a mobile communication device capable of simultaneously assuring authentication response and reducing the power consumption by setting an authentication interval considering the movement of a person to be authenticated. In this device, a first sensor unit (111) detects a movement. A first control unit (112) judges whether a mobile communication terminal device (101) has moved according to a sensor output value of the first sensor unit (111). A first authentication cycle decision unit (113) decides an authentication cycle according to the judgment result obtained by the first control unit (112) whether movement is present and the information whether movement of a key unit (102) is present. A first timing generation unit (114) controls the timing so as to perform authentication at the authentication timing decided by the first authentication cycle decision unit (113). A first sequence processing unit (116) performs radio authentication between itself and a second sequence processing unit (125) of the key unit (102).

Description

  The present invention particularly relates to a mobile communication device, a wireless authentication system, and a wireless authentication method that perform wireless authentication.

  2. Description of the Related Art Conventionally, in a mobile communication system in which a mobile station performs intermittent reception, one that changes the intermittent reception interval of the mobile station is known in order to reduce power consumption of the mobile station (for example, Patent Document 1).

According to Patent Document 1, the mobile station changes the intermittent reception interval according to the incoming call frequency or the radio wave condition. Changing such an intermittent reception interval can also be applied to a wireless authentication technique.
JP 2000-261364 A

  However, in Patent Document 1, since the base station that communicates with the mobile station does not move, the mobile station sets the intermittent reception interval without considering the movement of the base station. Therefore, when the mobile communication system described in Patent Document 1 is applied to a wireless authentication system between communication apparatuses that move with each other, movement is considered for one communication apparatus, but movement is performed for the other communication apparatus. The authentication interval is set without considering the above. In this case, for example, when a communication device that considers movement is stationary and a communication device that does not consider movement is moving, the movement is not detected by each communication device. The authentication interval is extended as if they are stationary. However, when the communication apparatus is moving, there is a problem that a desired responsiveness in authentication cannot be secured unless the authentication interval is shortened.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a mobile communication device, a wireless authentication system, and a wireless authentication that can achieve both of ensuring authentication responsiveness and reducing power consumption by setting an authentication interval in consideration of movement of an authentication partner. Is to provide a method.

  The mobile communication device according to the present invention is based on a movement detection unit that detects movement, a reception unit that receives movement information that is movement information of a communication partner, a result of the detection in the movement detection unit, and the movement information. An authentication cycle determining unit that determines an authentication cycle, which is a cycle for intermittently performing wireless authentication with the communication partner, and an authentication unit that performs authentication with the communication partner with the determined authentication cycle are employed.

  The wireless authentication system of the present invention is a wireless authentication system that performs wireless authentication between a first mobile communication device and a second mobile communication device, wherein the first mobile communication device detects movement. The second mobile communication device performs authentication with the second mobile communication device at an authentication cycle determined based on the detection result and the movement information that is information indicating whether or not the second mobile communication device has moved. The apparatus detects movement and authenticates with the first mobile communication apparatus at an authentication cycle determined based on the detection result and movement information that is information on presence / absence of movement of the first mobile communication apparatus. The structure which performs is taken.

The wireless authentication method of the present invention includes a step in which a first mobile communication device detects movement, a step in which the first mobile communication device receives movement information that is movement information of the second mobile communication device, and the first The mobile communication device determining an authentication cycle, which is a cycle for performing wireless authentication intermittently with the second mobile communication device based on the detection result and the mobile information; and the first mobile communication device and the And authenticating with the determined authentication period with the second mobile communication device.

  According to the present invention, by determining the authentication interval in consideration of the movement of the authentication partner, it is possible to achieve both of ensuring authentication responsiveness and reducing power consumption.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The wireless authentication system according to the present invention includes a plurality of mobile communication devices that are movable with respect to each other.

(Embodiment 1)
FIG. 1 is a block diagram showing a wireless authentication system 100 according to Embodiment 1 of the present invention. In the first embodiment, a case where the wireless authentication system 100 is configured by the mobile communication terminal device 101 and the key unit 102 will be described as an example. Note that the wireless authentication system 100 is not limited to being configured by the mobile communication terminal device 101 and the key unit 102, and can be configured by any plurality of movable mobile communication devices.

  First, the configuration of the mobile communication terminal apparatus 101 will be described.

  The input unit 110 outputs a signal corresponding to an external operation such as a call start signal or a call end signal to the first control unit 112.

  The first sensor unit 111 serving as a movement detection unit detects whether or not the mobile communication terminal apparatus 101 has moved, and outputs the detection result to the first control unit 112 as a sensor output value. The first sensor unit 111 includes, for example, an acceleration sensor, a vibration sensor, a gyro sensor, an SPS (Satellite Positioning System) such as a GPS (Global Positioning System), a CCD (Charge Coupled Device) sensor, an optical sensor for controlling the illuminance of a liquid crystal, When the mobile communication terminal apparatus 101 has a foldable casing, the detection sensor detects that the casing has been opened from the folded state.

The first control unit 112 that is a movement detection unit processes a signal input from the input unit 110. Further, the first control unit 112 is based on the sensor output value input from the first sensor unit 111 at the timing of performing authentication in accordance with the timing signal input from the first timing generation unit 114, and the mobile communication terminal device 101 generates movement detection information that is information on whether or not there is movement of 101, and outputs the generated movement detection information to the first sequence processing unit 116. Further, the first control unit 112 is based on the sensor output value input from the first sensor unit 111 at the timing of performing authentication in accordance with the timing signal input from the first timing generation unit 114, and the mobile communication terminal device It is determined whether or not 101 has moved, and the determination result is output to the first authentication cycle determination unit 113 as movement information. Specifically, the first control unit 112 determines that the mobile communication terminal device 101 is stationary when the sensor output value input from the first sensor unit 111 does not indicate movement within a predetermined time. In addition to determining, movement detection information indicating that the mobile communication terminal apparatus 101 is stationary is generated. On the other hand, the first control unit 112 determines that the mobile communication terminal device 101 is moving and moves when the sensor output value input from the first sensor unit 111 indicates movement within a predetermined time. Movement detection information indicating movement of the communication terminal apparatus 101 is generated.

  For example, the first control unit 112 does not indicate movement when the sensor output value of the first sensor unit 111 such as an acceleration sensor, a vibration sensor, or a gyro sensor is less than a predetermined value. It is determined that the camera is stationary. If the sensor output value is equal to or greater than a predetermined value, it is determined that the camera is moving. These sensor output values may be vector quantities or scalar quantities. Further, for example, the first control unit 112 does not indicate movement when the change in the sensor output value of the position detected by the SPS such as GPS is within a predetermined time is less than a predetermined value. When the sensor output value is determined to be stationary and the change in the sensor output value within a predetermined time is greater than or equal to a predetermined value, it is determined that the sensor is moving. The output values of these sensors may be vector quantities or scalar quantities. In addition, for example, the first control unit 112, when a change within a predetermined time of a sensor output value of a CCD (Charge Coupled Devices) sensor, a liquid crystal illuminance control light sensor or the like is less than a predetermined value, It is determined that the movement is not indicated, that is, it is stationary. If the change in the sensor output value within a predetermined time is equal to or larger than a predetermined value, it is determined that the movement is being performed. Further, for the sake of convenience, the amounts indicated by these sensor output values will be referred to as movement detection amounts or movement amounts.

  Further, for example, in the first control unit 112, the first sensor unit 111 does not detect that the case where the mobile communication terminal apparatus 101 has a foldable case has changed from a folded state to an open state. In this case, if the first sensor unit 111 detects that the movement is not indicated, that is, it is stationary, and the first sensor unit 111 detects that the folded state is changed to the opened state, it is determined that the movement is performed.

  The first authentication cycle determination unit 113 includes movement information that is input from the first control unit 112 and that indicates whether the mobile communication terminal device 101 has moved, and the key unit 102 that is input from the first wireless transmission / reception unit 115. An authentication period is determined based on movement information that is information on the presence or absence of movement. Then, the first authentication cycle determination unit 113 outputs the determined authentication cycle as timing information to the first timing generation unit 114. The method for determining the authentication cycle will be described later.

  The first timing generator 114 controls the timing when the mobile communication terminal apparatus 101 communicates with the key unit 102 intermittently. Further, the first timing generation unit 114 generates a timing signal for performing authentication in the authentication period of the timing information input from the first authentication period determination unit 113. Then, the first timing generation unit 114 outputs the generated timing signal to the first control unit 112 and the first wireless transmission / reception unit 115.

The first radio transmission / reception unit 115 is a radio modulated by the baseband signal including the authentication information input from the first sequence processing unit 116 at the timing of performing authentication according to the timing signal input from the first timing generation unit 114. The signal is output to the antenna 117. The first radio transceiver 115 demodulates the radio signal input from the antenna 117 to obtain a baseband signal. Then, the first wireless transmission / reception unit 115 extracts the authentication information and the movement detection information of the key unit 102 from the baseband signal, outputs the extracted authentication information to the first sequence processing unit 116, and extracts the extracted movement detection. The information is output to the first authentication cycle determination unit 113.

  The first sequence processing unit 116 serving as an authentication unit outputs authentication information, which is information for the key unit 102 to authenticate the mobile communication terminal device 101, to the first wireless transmission / reception unit 115. At this time, the first sequence processing unit 116 adds the movement detection information input from the first control unit 112 to the authentication information, and outputs the authentication information with the movement detection information added to the first wireless transmission / reception unit 115. To do. Further, the first sequence processing unit 116 authenticates the key unit 102 based on the authentication information input from the first wireless transmission / reception unit 115. Specifically, the first sequence processing unit 116 owns an ID previously associated with the ID owned by the second sequence processing unit 125 of the key unit 102, and confirms that each other is a pair by wireless communication. Always know by grasping.

  The antenna 117 transmits a signal input from the first wireless transmission / reception unit 115 to the key unit 102, receives a signal transmitted from the key unit 102, and outputs the signal to the first wireless transmission / reception unit 115.

  Next, the configuration of the key unit 102 will be described. Here, the key unit 102 means that the mobile communication terminal device 101 is disabled when the mobile communication terminal device 101 leaves the owner or the user due to misplacement or theft, and the mobile communication terminal device 101 This is a mobile communication device that warns that the user has left the key unit 102 more than a certain distance.

  The second sensor unit 120 that is a movement detection unit detects whether or not the key unit 102 has moved, and outputs the detection result to the second control unit 121 as a sensor output value. The second sensor unit 120 is, for example, an acceleration sensor, a vibration sensor, a gyro sensor, a GPS, a CCD sensor, or a liquid crystal illuminance control optical sensor.

  The second control unit 121, which is a movement detection unit, performs key authentication based on the sensor output value input from the second sensor unit 120 at the timing of authentication according to the timing signal input from the second timing generation unit 123. Movement detection information that is information on whether the unit 102 has moved is generated, and the generated movement detection information is output to the second sequence processing unit 125. In addition, the second control unit 121 determines whether the key unit 102 is based on the sensor output value input from the second sensor unit 120 at the timing of performing authentication according to the timing signal input from the second timing generation unit 123. It is determined whether it has moved, and the determination result is output to the second authentication cycle determination unit 122. Specifically, the second control unit 121 determines that the key unit 102 is stationary when the sensor output value input from the second sensor unit 120 does not fluctuate within a certain period of time, and the key unit. The movement detection information 102 is stationary. On the other hand, the second control unit 121 determines that the key unit 102 is moving and moves the key unit 102 when the sensor output value input from the second sensor unit 120 fluctuates within a certain time. Generating movement detection information.

  The second authentication cycle determination unit 122 uses the determination result input from the second control unit 121 and the movement information, which is information about the presence / absence of movement of the mobile communication terminal device 101, input from the second radio transmission / reception unit 124. Based on this, the authentication cycle is determined. Then, the second authentication cycle determination unit 122 outputs the determined authentication cycle as timing information to the second timing generation unit 123. The method for determining the authentication cycle will be described later.

  The second timing generator 123 controls the timing when the key unit 102 communicates with the mobile communication terminal device 101 intermittently. In addition, the second timing generation unit 123 generates a timing signal for performing authentication in the authentication cycle of the timing information input from the second authentication cycle determination unit 122. Then, the second timing generation unit 123 outputs the generated timing signal to the second control unit 121 and the second wireless transmission / reception unit 124.

  The second radio transmission / reception unit 124 is a radio modulated by the baseband signal including the authentication information input from the second sequence processing unit 125 at the timing of authentication according to the timing signal input from the second timing generation unit 123. The signal is output to the antenna 126. The second radio transmission / reception unit 124 demodulates the radio signal input from the antenna 126 to obtain a baseband signal. Then, the second wireless transmission / reception unit 124 extracts authentication information and movement detection information of the mobile communication terminal device 101 from the baseband signal, and outputs the extracted authentication information to the second sequence processing unit 125 and extracts it. The movement detection information is output to the second authentication cycle determination unit 122.

  The second sequence processing unit 125, which is an authentication unit, outputs authentication information, which is information for the mobile communication terminal apparatus 101 to authenticate the key unit 102, to the second wireless transmission / reception unit 124. At this time, the second sequence processing unit 125 adds the movement detection information input from the second control unit 121 to the authentication information, and outputs the authentication information with the movement detection information added to the second wireless transmission / reception unit 124. To do. Further, the second sequence processing unit 125 authenticates the mobile communication terminal apparatus 101 based on the authentication information input from the second wireless transmission / reception unit 124. Specifically, the second sequence processing unit 125 owns an ID previously associated with the ID owned by the first sequence processing unit 116 of the mobile communication terminal apparatus 101, and is paired with each other by wireless communication. Authentication is always performed by grasping this.

  The antenna 126 transmits the signal input from the second radio transmission / reception unit 124 to the mobile communication terminal apparatus 101 and receives the signal transmitted from the mobile communication terminal apparatus 101 to the second radio transmission / reception unit 124. Output.

  Next, a wireless authentication method using the wireless authentication system 100 will be described with reference to FIGS. 2 and 3 are flowcharts showing the wireless authentication method.

  First, a wireless authentication method in the mobile communication terminal apparatus 101 will be described with reference to FIG. From FIG. 2, a power supply unit (not shown) of the mobile communication terminal apparatus 101 supplies power to the mobile communication terminal apparatus 101 (power on) (step ST201).

  Next, the first sequence processing unit 116 performs pairing processing such as connection setting with the second sequence processing unit 125 of the key unit 102, and performs synchronization for authentication in the authentication cycle Pα = P0. (Step ST202).

  Next, the first control unit 112 resets the flag Fα, and the first authentication cycle determination unit 113 resets the flag Eα (parameter value for determining the authentication cycle) (Fα = 0, Eα = 0). (Step ST203). Here, “α” indicates that the flag is set in the mobile communication terminal apparatus 101, and “F” indicates a flag indicating whether or not only one of the mobile communication terminal apparatus 101 and the key unit 102 has moved. "E" indicates that the flag is set in consideration of whether or not both the mobile communication terminal apparatus 101 and the key unit 102 have moved.

Next, the first sensor unit 111 detects the presence or absence of movement of the mobile communication terminal device 101, and the first control unit 112 determines the mobile communication terminal device based on the sensor output value of the first sensor unit 111. It is determined whether 101 has moved, that is, whether mobile communication terminal apparatus 101 is stationary (step ST204).

  When it is determined that the mobile communication terminal device 101 is stationary, the first control unit 112 determines whether it is an authentication timing based on the timing signal input from the first timing generation unit 114. (Step ST205).

  On the other hand, when determining in step ST204 that the mobile communication terminal apparatus 101 is not stationary, the first control unit 112 sets the flag Fα of the mobile communication terminal apparatus 101 to “1” (Fα = 1). (Step ST206), the first control unit 112 determines whether or not it is an authentication timing based on the timing signal input from the first timing generation unit 114 (step ST205).

  Here, for example, when the first sensor unit 111 is an acceleration sensor, the first control unit 112 performs the mobile communication terminal device when the first sensor unit 111 detects an acceleration of a predetermined value or more. 101 is determined to have moved. Further, when the first sensor unit 111 is a GPS, the first control unit 112 moves the mobile communication terminal device 101 when the first sensor unit 111 detects a change in latitude and longitude. Is determined. When the first sensor unit 111 is a CCD sensor of the camera, the mobile communication terminal device 101 moves when the first control unit 112 detects a change in luminance or chromaticity detected by the CCD sensor. It is determined that When the first sensor unit 111 is an optical sensor for controlling the illuminance of the liquid crystal, the first control unit 112 is configured such that the illuminance of the liquid crystal controlled by the first sensor unit 111 changes by a predetermined value or more. The mobile communication terminal apparatus 101 determines that it has moved. In addition, when the first sensor unit 111 is a detection sensor that detects that the housing is opened from the folded state, the first control unit 112 is configured so that the first sensor unit 111 is the housing. Mobile communication terminal apparatus 101 determines that it has moved when it is detected that the mobile phone has been opened from the folded state.

  In step ST205, when the first control unit 112 determines that it is the authentication timing, the first sequence processing unit 116 receives the notification of the authentication timing from the first control unit 112, and receives the key unit. An authentication process is performed with the second sequence processing unit 125 (step ST207). At this time, the first sequence processing unit 116 acquires the flag Fα set by the first control unit 112, adds the acquired flag Fα to the authentication information as movement detection information, and the first wireless transmission / reception unit 115. Transmits the authentication information to which the movement detection information is added to the key unit 102. Further, the first wireless transmission / reception unit 115 receives a flag Fβ, which is movement detection information indicating whether or not the key unit 102 has moved, transmitted from the key unit 102 via the antenna 117. Here, “β” indicates a flag set by the key unit 102. On the other hand, when the first control unit 112 determines that it is not the authentication timing in step ST205, the processing of step ST204 to step ST206 is repeated.

  Next, mobile communication terminal apparatus 101 determines whether or not the communication is successful (step ST208).

  If the communication is not successful, the mobile communication terminal apparatus 101 repeats the processing from step ST204 to step ST208.

  On the other hand, when the communication is successful, the first authentication cycle determination unit 113 determines whether or not the mobile communication terminal device 101 is stationary based on the flag Fα acquired from the first control unit 112, that is, Fα = 0. Is determined (step ST209).

  If Fα = 0 is not satisfied, the first authentication cycle determination unit 113 resets the authentication cycle Pα and sets the authentication cycle Pα to P0 (Pα = P0) (step ST210).

  On the other hand, when Fα = 0, the first authentication cycle determination unit 113 determines whether or not the key unit 102 is stationary based on the flag Fβ acquired from the first wireless transmission / reception unit 115, that is, Fβ = 0. Is determined (step ST211).

  If Eβ = 0 is not satisfied, the first authentication cycle determination unit 113 resets the authentication cycle Pα and sets the authentication cycle Pα to P0 (Pα = P0) (step ST210).

  On the other hand, when Eβ = 0, the first authentication cycle determination unit 113 weights the stationary condition (step ST212). Specifically, the first authentication cycle determination unit 113 adds the weighting coefficient We (We> 0) to the flag Eα and updates the value of the flag Eα (Eα = Eα + We).

  Next, the first authentication cycle determination unit 113 determines whether or not the updated flag Eα (Eα + We) exceeds the threshold T (Eα> T?) (Step ST213).

  If the updated flag Eα does not exceed the threshold value T, the processing from step ST204 to step ST213 is repeated.

  On the other hand, if the updated flag Eα exceeds the threshold value T, the first authentication cycle determination unit 113 extends the authentication cycle (step ST214). Specifically, the first authentication cycle determination unit 113 updates the authentication cycle Pα by adding ΔP (P> 0) to the authentication cycle Pα (Pα = Pα + ΔP). At this time, when the updated authentication cycle Pα is equal to or greater than the upper limit threshold, the first authentication cycle determination unit 113 sets the authentication cycle Pα as the upper limit threshold so that the authentication cycle Pα does not exceed the upper limit threshold. .

  Then, after resetting the authentication cycle in step ST210 or extending the authentication cycle in step ST214, the processes in steps ST203 to ST214 are repeated. The mobile communication terminal apparatus 101 performs the processing of step ST201 to step ST214 for each authentication.

Next, a wireless authentication method in the key unit 102 will be described with reference to FIG.
From FIG. 3, the power supply unit (not shown) of the key unit 102 supplies power to the key unit 102 (power on) (step ST301).

  Next, the second sequence processing unit 125 performs pairing processing such as connection setting with the first sequence processing unit 116 of the mobile communication terminal apparatus 101, and performs authentication at the authentication cycle Pβ = P0. Synchronize (step ST302).

  Next, the second control unit 121 resets the flag Fβ, and the second authentication cycle determination unit 122 resets the flag Eβ (parameter value for authentication cycle determination) (Fβ = 0, Eβ = 0). (Step ST303).

  Next, the second sensor unit 120 detects whether or not the key unit 102 has moved, and the second control unit 121 moves the key unit 102 based on the sensor output value in the second sensor unit 120. Whether or not the key unit 102 is stationary is determined (step ST304).

  When it is determined that the key unit 102 is stationary, the second control unit 121 determines whether or not it is an authentication timing based on the timing signal input from the second timing generation unit 123 ( Step ST305).

  On the other hand, when determining in step ST304 that the key unit 102 is not stationary, the second control unit 121 sets the flag Fβ of the key unit 102 to “1” (Fβ = 1) (step ST306). The second control unit 121 determines whether it is an authentication timing based on the timing signal input from the second timing generation unit 123 (step ST305).

  In step ST305, when the second control unit 121 determines that it is the authentication timing, the second sequence processing unit 125 receives the notification of the authentication timing from the second control unit 121, and receives the mobile communication terminal. Authentication processing is performed with the first sequence processing unit 116 of the apparatus 101 (step ST307). At this time, the second sequence processing unit 125 acquires the flag Fβ set by the second control unit 121, adds the acquired flag Fβ to the authentication information as movement detection information, and the second wireless transmission / reception unit 124. Transmits the authentication information added with the movement detection information to the mobile communication terminal apparatus 101. Further, the second wireless transmission / reception unit 124 receives the flag Fα transmitted from the mobile communication terminal apparatus 101 and indicating whether or not the mobile communication terminal apparatus 101 has moved via the antenna 126. On the other hand, when the second control unit 121 determines in step ST305 that the timing is not the authentication timing, the processes in steps ST304 to ST306 are repeated.

  Next, the key unit 102 determines whether or not the communication is successful (step ST308).

  If the communication is not successful, the key unit 102 repeats the processing from step ST304 to step ST308.

  On the other hand, when the communication is successful, the second authentication cycle determination unit 122 determines whether or not the key unit 102 is stationary based on the flag Fβ acquired from the second control unit 121, that is, Fβ = 0. Whether or not (step ST309).

  If Fβ = 0 is not satisfied, the second authentication cycle determining unit 122 resets the authentication cycle Pβ and sets the authentication cycle Pβ to P0 (Pβ = P0) (step ST310).

  On the other hand, when Fβ = 0, the second authentication cycle determination unit 122 determines whether or not the mobile communication terminal apparatus 101 is stationary based on the flag Fα acquired from the second wireless transmission / reception unit 124, that is, Fα. It is determined whether or not 0 (step ST311).

  If Fα = 0 is not satisfied, the second authentication cycle determining unit 122 resets the authentication cycle Pβ and sets the authentication cycle Pβ to P0 (Pβ = P0) (step ST310).

  On the other hand, when Fα = 0, the second authentication cycle determination unit 122 weights the stationary condition (step ST312). Specifically, the second authentication cycle determination unit 122 adds the weight coefficient We to the flag Eβ and updates the value of the flag Eβ (Eβ = Eβ + We).

  Next, the second authentication cycle determination unit 122 determines whether or not the updated flag Eβ (Eβ + We) exceeds the threshold T (Eβ> T?) (Step ST313).

  If the updated flag Eβ does not exceed the threshold value T, the processing from step ST304 to step ST313 is repeated.

  On the other hand, if the updated flag Eβ exceeds the threshold value T, the second authentication cycle determination unit 122 extends the authentication cycle (step ST314). Specifically, the second authentication cycle determination unit 122 adds ΔP to the authentication cycle Pβ to update the authentication cycle Pβ (Pβ = Pβ + ΔP). At this time, if the updated authentication period Pβ is equal to or greater than the upper limit threshold, the second authentication period determination unit 122 sets the authentication period Pβ as the upper limit threshold so that the authentication period Pβ does not exceed the upper limit threshold. .

  Then, after resetting the authentication cycle in step ST310 or extending the authentication cycle in step ST314, the processes in steps ST303 to ST314 are repeated. The key unit 102 executes the processing of step ST301 to step ST314 for each authentication.

  As described above, according to the first embodiment, by determining the authentication interval in consideration of the movement of the authentication partner, it is possible to achieve both of ensuring authentication responsiveness and reducing power consumption. Further, according to the first embodiment, each time it is determined that the mobile communication terminal device and the key unit are stationary, the stationary condition is weighted, and the weighted flag and the threshold value are compared each time weighting is performed. Since the authentication cycle is extended for the first time only when the weighted flag is larger than the threshold, it is possible to prevent the authentication cycle from being inadvertently extended due to an erroneous determination result.

(Embodiment 2)
FIG. 4 is a diagram showing a configuration of a wireless authentication system 400 according to Embodiment 2 of the present invention. In the second embodiment, a case where the wireless authentication system 400 is configured by the mobile communication terminal device 401 and the key unit 402 will be described as an example. Note that the wireless authentication system 400 is not limited to the case where the wireless authentication system 400 is configured by the mobile communication terminal device 401 and the key unit 402, and can be configured by any plurality of mobile communication devices that can be moved.

  As shown in FIG. 4, mobile communication terminal apparatus 401 according to Embodiment 2 adds time measurement section 410 and threshold setting section 411 to mobile communication terminal apparatus 101 according to Embodiment 1 shown in FIG. Instead of the first authentication cycle determination unit 113, a first authentication cycle determination unit 411 is provided. Further, as shown in FIG. 4, the key unit 402 according to the second embodiment includes a time measurement unit 420, an input unit 421, and a threshold setting unit 422 in the key unit 102 according to the first embodiment shown in FIG. In addition, a second authentication cycle determination unit 422 is provided instead of the second authentication cycle determination unit 122. In FIG. 4, parts having the same configuration as in FIG.

  First, the configuration of the mobile communication terminal device 401 will be described.

  The input unit 110 serving as time zone setting means outputs a signal corresponding to an external operation such as a call start signal or a call end signal to the first control unit 112. The input unit 110 can set an arbitrary time zone and a threshold value in each time zone by an external operation, and outputs the set time zone and threshold value to the first authentication cycle determination unit 411. For example, the input unit 110 sets a threshold value for a midnight time zone in which the movement of the mobile communication terminal device 401 is considered to be less than a threshold value for a time zone other than midnight. Note that the input unit 110 may have an input form in which a plurality of preset threshold values are selected according to a set time zone.

The first control unit 112 that is a movement detection unit processes a signal input from the input unit 110. Further, the first control unit 112 is based on the sensor output value input from the first sensor unit 111 at the timing of performing authentication in accordance with the timing signal input from the first timing generation unit 114, and the mobile communication terminal device The movement detection information that is the presence / absence of movement 401 is generated, and the generated movement detection information is output to the first sequence processing unit 116. Further, the first control unit 112 is based on the sensor output value input from the first sensor unit 111 at the timing of performing authentication in accordance with the timing signal input from the first timing generation unit 114, and the mobile communication terminal device It is determined whether 401 has moved, and the determination result is output to the first authentication cycle determination unit 411. Specifically, the first control unit 112 determines that the mobile communication terminal device 401 is stationary when the sensor output value input from the first sensor unit 111 does not vary within a predetermined time. The mobile communication terminal device 401 generates movement detection information that is stationary. On the other hand, the first control unit 112 determines that the mobile communication terminal device 401 is moving and the mobile communication terminal when the sensor output value input from the first sensor unit 111 fluctuates within a certain time. The movement detection information that the apparatus 401 is moving is generated.

  The time measurement unit 410 measures the time and outputs the measured time to the first authentication cycle determination unit 113.

  The first authentication cycle determination unit 411 creates and stores threshold selection information in which the time zone input from the input unit 110 is associated with the threshold. In addition, each time the time is input from the time measurement unit 410, the first authentication cycle determination unit 411 selects a threshold by referring to the threshold selection information using the input time. The first authentication cycle determination unit 411 is information on the selected threshold, the detection result input from the first control unit 112, and the presence / absence of movement of the key unit 102 input from the first wireless transmission / reception unit 115. An authentication cycle is determined based on the movement detection information. Then, the first authentication cycle determination unit 411 outputs the determined authentication cycle to the first timing generation unit 114 as timing information.

  The first timing generator 114 controls the timing when the mobile communication terminal device 401 communicates with the key unit 402 intermittently. Further, the first timing generation unit 114 generates a timing signal for performing authentication in the authentication period of the timing information input from the first authentication period determination unit 411. Then, the first timing generation unit 114 outputs the generated timing signal to the first control unit 112 and the first wireless transmission / reception unit 115.

  The first radio transmission / reception unit 115 is a radio modulated by the baseband signal including the authentication information input from the first sequence processing unit 116 at the timing of performing authentication according to the timing signal input from the first timing generation unit 114. The signal is output to the antenna 117. The first radio transceiver 115 demodulates the radio signal input from the antenna 117 to obtain a baseband signal. Then, the first wireless transmission / reception unit 115 extracts authentication information and movement detection information from the baseband signal, outputs the extracted authentication information to the first sequence processing unit 116, and outputs the extracted movement detection information to the first To the authentication cycle determination unit 411.

  Next, the configuration of the key unit 402 will be described.

  The time measurement unit 420 measures the time and outputs the measured time to the second authentication cycle determination unit 122.

  The input unit 421 can set an arbitrary time zone and a threshold value in each time zone by an external operation, and outputs the set time zone and threshold value to the second authentication cycle determination unit 122. For example, the input unit 421 sets a threshold value for a midnight time zone where the movement of the key unit 402 is considered to be less than a threshold value for a time zone other than midnight. The input unit 421 may be in an input form in which a plurality of preset threshold values are selected according to a set time zone.

  The second control unit 121, which is a movement detection unit, performs key authentication based on the sensor output value input from the second sensor unit 120 at the timing of authentication according to the timing signal input from the second timing generation unit 123. Movement detection information that is information on whether or not the unit 402 has moved is generated, and the generated movement detection information is output to the second sequence processing unit 125. In addition, the second control unit 121 has the key unit 402 based on the sensor output value input from the second sensor unit 120 at the timing of performing authentication according to the timing signal input from the second timing generation unit 123. It is determined whether or not it has moved, and the determination result is output to the second authentication cycle determination unit 422. Specifically, the second control unit 121 determines that the key unit 402 is stationary and the key unit when the sensor output value input from the second sensor unit 120 does not vary within a predetermined time. The movement detection information 402 is stationary. On the other hand, the second control unit 121 determines that the key unit 402 is moving and moves the key unit 402 when the sensor output value input from the second sensor unit 120 fluctuates within a certain time. Generating movement detection information.

  The second authentication cycle determination unit 422 creates and stores threshold selection information in which the time zone input from the input unit 421 is associated with the threshold. In addition, every time a time is input from the time measurement unit 420, the second authentication cycle determination unit 422 selects a threshold by referring to the threshold selection information using the input time. Then, the second authentication cycle determination unit 422 includes the selected threshold value, the detection result input from the second control unit 122, and the information on the presence or absence of movement of the mobile communication terminal device 401 input from the second wireless transmission / reception unit 124. An authentication period is determined based on the movement information. Then, the second authentication cycle determination unit 422 outputs the determined authentication cycle as timing information to the second timing generation unit 123.

  The second timing generator 123 controls the timing when the key unit 402 communicates with the mobile communication terminal device 401 intermittently. In addition, the second timing generation unit 123 generates a timing signal for performing authentication in the authentication cycle of the timing information input from the second authentication cycle determination unit 422. Then, the second timing generation unit 123 outputs the generated timing signal to the second control unit 121 and the second wireless transmission / reception unit 124.

  Second radio transmission / reception unit 124 outputs, to antenna 126, a radio signal modulated by a baseband signal including authentication information input from second sequence processing unit 125 in accordance with the timing signal input from second timing generation unit 123. To do. The second radio transmission / reception unit 124 demodulates the radio frequency of the signal input from the antenna 126 to obtain a baseband signal. Then, the second wireless transmission / reception unit 124 extracts the authentication information and the movement information from the baseband signal, outputs the extracted authentication information to the second sequence processing unit 125, and uses the extracted movement information as the second authentication. It outputs to the period determination part 422.

  Next, a wireless authentication method using the wireless authentication system 400 will be described with reference to FIGS. 5 and 6 are flowcharts showing the wireless authentication method. 5 and 6, the same reference numerals are given to the same processing as in FIGS. 2 and 3, and the description thereof is omitted.

  First, a wireless authentication method in the mobile communication terminal device 401 will be described with reference to FIG.

  In step ST211, when Fβ = 0, the first authentication cycle determination unit 411 determines whether or not the key unit 402 is stationary based on the flag Fβ acquired from the first wireless transmission / reception unit 115, that is, Fβ. It is determined whether or not 0 (step ST211).

  When Eβ = 0, the first authentication cycle determination unit 411 determines whether the sleep condition is satisfied, that is, the time input from the time measurement unit 410 is set as a time zone in which the movement is small by the input unit 110. It is determined whether it is included in the determined time zone (step ST501).

  In the case of the sleep condition, the first authentication cycle determination unit 411 selects and sets the threshold value T1 having a lower value than that in the case of not the sleep condition by referring to the threshold selection information (step ST502). ).

  On the other hand, when the sleep condition is not satisfied, the first authentication cycle determination unit 411 refers to the threshold selection information, and thus has a higher normal threshold value T0 (T0> T1) than that when the sleep condition is satisfied. Is selected and set (step ST503). That is, the threshold value T1 is a threshold value set to a value that makes it easier to extend the authentication cycle than the threshold value T0.

  Next, the first authentication cycle determination unit 411 weights the stationary condition (step ST212).

  Next, a wireless authentication method in the key unit 402 will be described with reference to FIG.

  In step ST309, when Fβ = 0, the second authentication cycle determination unit 422 determines whether or not the mobile communication terminal device 401 is stationary based on the flag Fα acquired from the second wireless transmission / reception unit 124. That is, it is determined whether or not Fα = 0 (step ST311).

  When Fα = 0, the second authentication cycle determination unit 422 determines whether or not the sleep condition is satisfied, that is, the time input from the time measurement unit 420 is set as a time zone in which the movement is small by the input unit 421. It is determined whether it is included in the determined time zone (step ST601).

  In the case of the sleep condition, the second authentication cycle determination unit 422 selects and sets the threshold value T1 having a lower value than that in the case of not the sleep condition by referring to the threshold selection information (step ST602). ).

  On the other hand, when the sleep condition is not satisfied, the second authentication cycle determination unit 422 refers to the threshold selection information, and thus has a higher normal threshold value T0 (T0> T1) than that when the sleep condition is satisfied. Is selected and set (step ST603).

  Next, the second authentication cycle determination unit 422 weights the stationary condition (step ST312).

  As described above, according to the second embodiment, in addition to the effect of the first embodiment, the threshold value of the time zone considered to be less moving is set to a value lower than the normal threshold value. By making it possible to easily set the authentication cycle in a time zone in which there is little movement, it is possible to further reduce power consumption while ensuring responsiveness of authentication.

(Embodiment 3)
7 and 8 are flowcharts showing a wireless authentication method according to Embodiment 3 of the present invention. In the third embodiment, the mobile communication terminal device and the key unit have the same configuration as in FIG.

First, a wireless authentication method in the mobile communication terminal apparatus 101 will be described with reference to FIG. In the third embodiment, the configuration of the mobile communication terminal apparatus and the key unit is the same as that in FIG. 1, and therefore, the reference numerals of the mobile communication terminal apparatus and the key unit in FIG.
It demonstrates using the same referential mark.

  From FIG. 7, the power supply unit (not shown) of mobile communication terminal apparatus 101 supplies power to mobile communication terminal apparatus 101 (power on) (step ST701).

  Next, the first sequence processing unit 116 performs pairing processing such as connection setting with the second sequence processing unit 125 of the key unit 102, and performs synchronization for authentication in the authentication cycle Pα = P0. (Step ST702).

  Next, the first authentication cycle determination unit 113 resets the movement detection amount Δα and the flag Eα (Δα = 0, Eα = 0) (step ST703). Here, “Δα” indicates a movement detection amount of the mobile communication terminal apparatus 101, that is, a movement amount of the mobile communication terminal apparatus 101 in a predetermined time.

  Next, the first sensor unit 111 detects the presence or absence of movement of the mobile communication terminal device 101, and the first control unit 112 determines the mobile communication terminal device based on the sensor output value in the first sensor unit 111. It is determined whether 101 has moved, that is, whether mobile communication terminal apparatus 101 is stationary (step ST704).

  When it is determined that the mobile communication terminal device 101 is stationary, the first control unit 112 determines whether it is an authentication timing based on the timing signal input from the first timing generation unit 114. (Step ST705).

  On the other hand, in Step ST704, when the first control unit 112 determines that the mobile communication terminal device 101 is not stationary, the first control unit 112 calculates the movement detection amount Δα based on the sensor output value input from the first sensor unit 111. Ask. The first authentication period determination unit 113 updates the movement detection amount Δα every time the movement detection amount Δα is acquired from the first control unit 112 (step ST706), and the first control unit 112 Based on the timing signal input from the timing generation unit 114, it is determined whether or not it is an authentication timing (step ST705).

  In step ST705, when the first control unit 112 determines that it is an authentication timing, the first sequence processing unit 116 receives the notification of the authentication timing from the first control unit 112, and receives the key unit 102. The second sequence processing unit 125 performs authentication processing (step ST707). At this time, the first sequence processing unit 116 acquires the movement detection amount Δα obtained by the first control unit 112, adds the acquired movement detection amount Δα to the authentication information as movement detection information, and The wireless transmission / reception unit 115 transmits the authentication information added with the movement detection information to the key unit 102. Further, the first wireless transmission / reception unit 115 receives the movement detection amount Δβ that is movement information of the key unit 102 transmitted from the key unit 102 via the antenna 117. On the other hand, when the first control unit 112 does not determine that it is the authentication timing in step ST705, the processing of step ST704 to step ST706 is repeated.

  Next, mobile communication terminal apparatus 101 determines whether or not communication is successful (step ST708).

  If the communication is not successful, the mobile communication terminal apparatus 101 repeats the processing from step ST704 to step ST708.

  On the other hand, when the communication is successful, the first authentication cycle determination unit 113 acquires the movement detection amount Δα acquired from the first control unit 112 and the movement detection amount Δβ acquired from the first wireless transmission / reception unit 115. Are equal (Δα = Δβ) (step ST709).

  If Δα = Δβ is not true, the first authentication cycle determination unit 113 resets the authentication cycle Pα and sets the authentication cycle Pα to P0 (Pα = P0) (step ST710).

  On the other hand, if Δα = Δβ, the first authentication cycle determination unit 113 weights the stationary condition (step ST711). Specifically, the first authentication cycle determination unit 113 adds the weight coefficient We to the flag Eα and updates the value of the flag Eα (Eα = Eα + We).

  Next, the first authentication cycle determination unit 113 determines whether or not the updated flag Eα (Eα + We) exceeds the threshold T (Eα> T?) (Step ST712).

  If the updated flag Eα does not exceed the threshold value T, the processing from step ST704 to step ST712 is repeated.

  On the other hand, if the updated flag Eα exceeds the threshold value T, the first authentication cycle determination unit 113 extends the authentication cycle (step ST713). Specifically, the first authentication cycle determination unit 113 adds ΔP to the authentication cycle Pα to update the authentication cycle Pα (Pα = Pα + ΔP). At this time, when the updated authentication cycle Pα is equal to or greater than the upper limit threshold, the first authentication cycle determination unit 113 sets the authentication cycle Pα as the upper limit threshold so that the authentication cycle Pα does not exceed the upper limit threshold. .

  Then, after resetting the authentication cycle in step ST710 or extending the authentication cycle in step ST713, the processes in steps ST703 to ST713 are repeated.

  Next, a wireless authentication method in the key unit 102 will be described with reference to FIG.

  From FIG. 8, the power supply unit (not shown) of the key unit 102 supplies power to the key unit 102 (power-on) (step ST801).

  Next, the second sequence processing unit 125 performs pairing processing such as connection setting with the first sequence processing unit 116 of the mobile communication terminal apparatus 101, and performs authentication at the authentication cycle Pβ = P0. Synchronize (step ST802).

  Next, the second authentication cycle determination unit 122 resets the movement detection amount Δβ and the flag Eβ (Δβ = 0, Eβ = 0) (step ST803). Here, “Δβ” indicates the movement detection amount of the key unit 102, that is, the movement amount of the key unit 102 in a predetermined time.

  Next, the second sensor unit 120 detects whether or not the key unit 102 has moved, and the second control unit 121 moves the key unit 102 based on the sensor output value in the second sensor unit 120. Whether or not the key unit 102 is stationary is determined (step ST804).

  When it is determined that the key unit 102 is stationary, the second control unit 121 determines whether or not it is an authentication timing based on the timing signal input from the second timing generation unit 123 ( Step ST805).

On the other hand, in step ST804, when it is determined that the key unit 102 is not stationary, the second control unit 121 obtains the movement detection amount Δβ based on the sensor output value input from the second sensor unit 120. The second authentication cycle determination unit 122 updates the movement detection amount Δβ every time the movement detection amount Δβ is acquired from the second control unit 121 (step ST806), and the second control unit 121 Based on the timing signal input from the timing generation unit 123, it is determined whether or not it is an authentication timing (step ST805).

  In Step ST805, when the second control unit 121 determines that it is the authentication timing, the second sequence processing unit 125 receives the notification of the authentication timing from the second control unit 121, and the mobile communication terminal Authentication processing is performed with the first sequence processing unit 116 of the apparatus 101 (step ST307). At this time, the second sequence processing unit 125 acquires the movement detection amount Δβ obtained by the second control unit 121, adds the acquired movement detection amount Δβ to the authentication information as movement detection information, and The wireless transmission / reception unit 124 transmits authentication information to which the movement detection information is added to the mobile communication terminal apparatus 101. Further, the second wireless transmission / reception unit 124 receives the movement detection amount Δα, which is the movement information of the mobile communication terminal apparatus 101 transmitted from the mobile communication terminal apparatus 101, via the antenna 126. On the other hand, when the second control unit 121 does not determine that it is the authentication timing in step ST805, the processes in steps ST804 to ST806 are repeated.

  Next, key unit 102 determines whether or not the communication is successful (step ST808).

  If the communication is not successful, the key unit 102 repeats the processes in steps ST804 to ST808.

  On the other hand, when the communication is successful, the second authentication cycle determination unit 122 determines the movement detection amount Δβ acquired from the second control unit 121 and the movement detection amount Δα acquired from the second wireless transmission / reception unit 124. Are equal (Δα = Δβ) (step ST809).

  If Δα = Δβ is not satisfied, the second authentication cycle determining unit 122 resets the authentication cycle Pβ and sets the authentication cycle Pβ to P0 (Pβ = P0) (step ST810).

  On the other hand, when Δα = Δβ, the second authentication cycle determination unit 122 weights the stationary condition (step ST811). Specifically, the second authentication cycle determination unit 122 adds the weight coefficient We to the flag Eβ and updates the value of the flag Eβ (Eβ = Eβ + We).

  Next, the second authentication cycle determination unit 122 determines whether or not the updated flag Eβ (Eβ + We) exceeds the threshold T (Eβ> T?) (Step ST812).

  If the updated flag Eβ does not exceed the threshold value T, the processes in steps ST804 to ST812 are repeated.

  On the other hand, if the updated flag Eβ exceeds the threshold T, the second authentication cycle determination unit 122 extends the authentication cycle (step ST813). Specifically, the second authentication cycle determination unit 122 adds ΔP to the authentication cycle Pβ to update the authentication cycle Pβ (Pβ = Pβ + ΔP). At this time, if the updated authentication period Pβ is equal to or greater than the upper limit threshold, the second authentication period determination unit 122 sets the authentication period Pβ as the upper limit threshold so that the authentication period Pβ does not exceed the upper limit threshold. .

  Then, after resetting the authentication cycle in step ST810 or extending the authentication cycle in step ST813, the processes in steps ST803 to ST813 are repeated.

  Here, as shown in FIG. 7 or FIG. 8, the first authentication cycle determination unit 113 or the second authentication cycle determination unit 122 has a case where Δα = Δβ, compared to a case where Δα = Δβ is not satisfied. Although the authentication cycle is lengthened, the present invention is not limited to this, and when the difference between Δα and Δβ (or the absolute value of the difference) is smaller than a predetermined value, the difference between Δα and Δβ (or the absolute value of the difference) The authentication cycle may be lengthened as compared with the case where is greater than or equal to a predetermined value.

  As described above, according to the third embodiment, by determining the authentication interval in consideration of the movement of the authentication partner, it is possible to achieve both of ensuring authentication responsiveness and reducing power consumption. In addition, according to the third embodiment, each time it is determined that the mobile communication terminal device and the key unit are stationary, the stationary condition is weighted, and the weighted flag is compared with the threshold value each time weighting is performed. Since the authentication cycle is extended for the first time only when the weighted flag is larger than the threshold, it is possible to prevent the authentication cycle from being inadvertently extended due to an erroneous determination result. Further, according to the third embodiment, since the authentication cycle is extended based on the detected movement detection amount, for example, the mobile communication terminal device and the key unit are in the same train even though they are in close proximity to each other. Since the authentication cycle can be extended even when the movement is detected because of the movement of the mobile phone, the power consumption can be further reduced in a state where the responsiveness of the authentication is ensured.

  The third embodiment can be applied to the second embodiment.

(Embodiment 4)
FIG. 9 is a block diagram showing a wireless authentication system 900 according to Embodiment 4 of the present invention. In the fourth embodiment, a case where the wireless authentication system 900 is configured by the mobile communication terminal device 901 and the key unit 902 will be described as an example. Note that the wireless authentication system 900 is not limited to the case where the wireless authentication system 900 is configured by the mobile communication terminal device 901 and the key unit 902, and can be configured by an arbitrary plurality of movable mobile communication devices.

  The mobile communication terminal apparatus 901 according to the fourth embodiment is the same as the mobile communication terminal apparatus 101 according to the first embodiment shown in FIG. 1, but instead of the first authentication period determining unit 113 as shown in FIG. 1 authentication cycle determination unit 910, a first wireless transmission / reception unit 911 instead of the first wireless transmission / reception unit 115, and a first sequence processing unit 912 instead of the first sequence processing unit 116. Have. 9, parts having the same configuration as in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

  First, the configuration of the mobile communication terminal device 901 will be described.

  The first control unit 112 that is a movement detection unit processes a signal input from the input unit 110. Further, the first control unit 112 is based on the sensor output value input from the first sensor unit 111 at the timing of performing authentication in accordance with the timing signal input from the first timing generation unit 114, and the mobile communication terminal device It is determined whether or not 901 has moved, and the determination result is output to the first authentication cycle determination unit 910. Specifically, the first control unit 112 determines that the mobile communication terminal device 901 is stationary when the sensor output value input from the first sensor unit 111 does not vary within a certain time. On the other hand, the first control unit 112 determines that the mobile communication terminal device 901 is moving when the sensor output value input from the first sensor unit 111 fluctuates within a certain time.

The first authentication cycle determination unit 910 is based on the determination result input from the first control unit 112 and the movement detection information that is information on the presence or absence of movement of the key unit 902 input from the first wireless transmission / reception unit 115. To determine the authentication period. Then, the first authentication cycle determination unit 113 outputs the determined authentication cycle as timing information to the first timing generation unit 114 and outputs the determined authentication cycle to the first sequence processing unit 912.

  The first timing generator 114 controls the timing when the mobile communication terminal device 901 communicates with the key unit 902 intermittently. In addition, the first timing generation unit 114 generates a timing signal for performing authentication in the authentication cycle of the timing information input from the first authentication cycle determination unit 910. Then, the first timing generation unit 114 outputs the generated timing signal to the first control unit 112 and the first wireless transmission / reception unit 911.

  The first radio transmission / reception unit 911 outputs, to the antenna 117, a radio signal modulated by a baseband signal including authentication information input from the first sequence processing unit 912 according to the timing signal input from the first timing generation unit 114. To do. The first wireless transmission / reception unit 911 demodulates the wireless signal input from the antenna 117 to obtain a baseband signal. Then, the first wireless transmission / reception unit 911 extracts authentication information and movement detection information of the key unit 902 from the baseband signal, outputs the extracted authentication information to the first sequence processing unit 912, and extracts the extracted movement detection. The information is output to the first authentication cycle determination unit 910.

  The first sequence processing unit 912 serving as an authentication unit outputs authentication information, which is information for the key unit 902 to authenticate the mobile communication terminal device 901, to the first wireless transmission / reception unit 911. At this time, the first sequence processing unit 912 adds the authentication cycle information, which is the authentication cycle information input from the first authentication cycle determination unit 910, to the authentication information, and adds the authentication information to which the authentication cycle information is added to the first authentication information. 1 to the wireless transmission / reception unit 911. Further, the first sequence processing unit 912 authenticates the key unit 902 based on the authentication information input from the first wireless transmission / reception unit 911. Specifically, the first sequence processing unit 912 owns an ID previously associated with the ID owned by the second sequence processing unit 924 of the key unit 902, and confirms that a pair is established by wireless communication. Always know by grasping.

  Next, the configuration of the key unit 902 will be described.

  The second sensor unit 920 detects that the key unit 902 has moved, and outputs the detection result to the second control unit 921. The second sensor unit 920 is, for example, an acceleration sensor, a GPS, a CCD sensor, or a liquid crystal illuminance control optical sensor.

  The second control unit 921 that is a movement detection unit performs key authentication based on the sensor output value input from the second sensor unit 920 at the authentication timing according to the timing signal input from the second timing generation unit 922. Movement detection information that is information on the presence or absence of movement of the unit 902 is generated, and the generated movement detection information is output to the second sequence processing unit 924. Specifically, the second control unit 921 generates movement detection information in which the key unit 902 is stationary when the sensor output value input from the second sensor unit 920 does not change within a predetermined time. On the other hand, when the sensor output value input from the second sensor unit 920 fluctuates within a certain time, the second control unit 921 generates movement detection information indicating that the key unit 902 is moving.

  The second timing generator 922 controls the timing when the key unit 902 communicates with the mobile communication terminal device 901 intermittently. Further, the second timing generation unit 922 generates a timing signal for performing authentication at the authentication cycle of the authentication cycle information input from the second wireless transmission / reception unit 923. Then, the second timing generation unit 922 outputs the generated timing signal to the second control unit 921 and the second wireless transmission / reception unit 923.

The second radio transmission / reception unit 923 is a radio modulated by the baseband signal including the authentication information input from the second sequence processing unit 924 at the timing of performing authentication according to the timing signal input from the second timing generation unit 922. The signal is output to the antenna 925. Also, the second radio transmission / reception unit 923 demodulates the radio signal input from the antenna 925 to obtain a baseband signal. Then, the second wireless transmission / reception unit 923 extracts the authentication information and the authentication cycle information from the baseband signal, outputs the extracted authentication information to the second sequence processing unit 924, and outputs the extracted authentication cycle information to the second To the timing generation unit 922.

  The second sequence processing unit 924 serving as an authentication unit outputs authentication information, which is information for the mobile communication terminal device 901 to authenticate the key unit 902, to the second wireless transmission / reception unit 923. At this time, the second sequence processing unit 924 adds the movement detection information input from the second control unit 921 to the authentication information, and outputs the authentication information with the movement detection information added to the second wireless transmission / reception unit 923. To do. Also, the second sequence processing unit 924 authenticates the mobile communication terminal device 901 based on the authentication information input from the second wireless transmission / reception unit 923. Specifically, the second sequence processing unit 924 owns an ID previously associated with the ID owned by the first sequence processing unit 912 of the mobile communication terminal device 901 and is paired with each other by wireless communication. Authentication is always performed by grasping this.

  The antenna 925 transmits the signal input from the second wireless transmission / reception unit 923 to the mobile communication terminal device 901, receives the signal transmitted from the mobile communication terminal device 901, and transmits the signal to the second wireless transmission / reception unit 923. Output.

  Next, a wireless authentication method using the wireless authentication system 100 will be described with reference to FIGS. 10 and 11 are flowcharts showing the wireless authentication method.

  First, a wireless authentication method in the key unit 902 will be described with reference to FIG.

  10, the power supply unit (not shown) of the key unit 902 supplies power to the key unit 902 (power is turned on) (step ST1001).

  Next, the second sequence processing unit 924 performs pairing processing such as connection setting with the first sequence processing unit 912 of the mobile communication terminal device 901, and performs authentication at the authentication cycle Pa = P0. Synchronize (step ST1002).

  Next, the second control unit 921 resets the flag Fβ (Fβ = 0) (step ST1003).

  Next, the second sensor unit 920 detects whether or not the key unit 902 has moved, and the second control unit 921 has moved the key unit 902 based on the sensor output value in the second sensor unit 920. Whether or not the key unit 902 is stationary is determined (step ST1004).

  When it is determined that the key unit 902 is stationary, the second control unit 921 determines whether it is an authentication timing based on the timing signal input from the second timing generation unit 922 ( Step ST1005).

  On the other hand, when determining in step ST1004 that the key unit 902 is not stationary, the second control unit 921 sets the flag Fβ of the key unit 902 to “1” (Fβ = 1) (step ST1006). The second control unit 921 determines whether or not it is an authentication timing based on the timing signal input from the second timing generation unit 922 (step ST1005).

  In Step ST1005, when the second control unit 921 determines that it is the authentication timing, the second sequence processing unit 924 receives the notification of the authentication timing from the second control unit 921 and receives the mobile communication terminal. Authentication processing is performed with the first sequence processing unit 912 of the apparatus 901 (step ST1007). At this time, the second sequence processing unit 924 acquires the flag Fβ set by the second control unit 921, adds the acquired flag Fβ to the authentication information as movement detection information, and the second wireless transmission / reception unit 923. Transmits the authentication information added with the movement detection information to the mobile communication terminal apparatus 901. Further, the second wireless transmission / reception unit 923 receives the authentication cycle information, which is the information of the authentication cycle P determined by the mobile communication terminal device 901, transmitted from the mobile communication terminal device 901 via the antenna 925. On the other hand, if the second control unit 921 does not determine that it is the authentication timing in step ST1005, the processes in steps ST1004 to ST1006 are repeated.

  Next, key unit 902 determines whether or not the communication is successful (step ST1008).

  If the communication is not successful, the key unit 902 repeats the processing from step ST1004 to step ST1008.

  On the other hand, when the communication is successful, the second timing generation unit 922 of the key unit 902 performs authentication in the authentication cycle of the authentication cycle information received by the key unit 902, that is, the first timing of the mobile communication terminal device 901. The timing is controlled so that the authentication is performed at the authentication cycle determined by the authentication cycle determination unit 910.

  Next, a wireless authentication method in mobile communication terminal apparatus 901 will be described using FIG.

  From FIG. 11, the power supply unit (not shown) of mobile communication terminal apparatus 901 supplies power to mobile communication terminal apparatus 901 (power on) (step ST1101).

  Next, the first sequence processing unit 912 performs pairing processing such as connection setting with the second sequence processing unit 924 of the key unit 902, and performs synchronization for performing authentication at the authentication cycle Pa = P0. (Step ST1102).

  Next, the first control unit 112 resets the flag Fα, and the first authentication cycle determination unit 910 resets the flag E and sets the authentication cycle P to the authentication cycle Pa after the authentication cycle determination (Fα = 0, E = 0, P = Pa) (step ST1103).

  Next, the first sensor unit 111 detects the presence or absence of movement of the mobile communication terminal device 901, and the first control unit 112 is based on the sensor output value in the first sensor unit 111. It is determined whether or not 901 has moved, that is, whether or not the mobile communication terminal device 901 is stationary (step ST1104).

  When it is determined that the mobile communication terminal device 901 is stationary, the first control unit 112 determines whether it is an authentication timing based on the timing signal input from the first timing generation unit 114. (Step ST1105).

On the other hand, when determining in step ST1104 that the mobile communication terminal apparatus 901 is not stationary, the first control unit 112 sets the flag Fα of the mobile communication terminal apparatus 901 to “1” (Fα = 1). (Step ST1106), the first control unit 112 determines whether or not it is an authentication timing based on the timing signal input from the first timing generation unit 114 (step ST1105).

  In step ST1105, when the first control unit 112 determines that it is the authentication timing, the first sequence processing unit 912 receives the authentication timing notification from the first control unit 112, and receives the key unit 902. Authentication processing is performed with the second sequence processing unit 924 (step ST1107). At this time, the first sequence processing unit 912 acquires the authentication cycle Pa from the first authentication cycle determination unit 910, adds the information of the acquired authentication cycle Pa to the authentication information as authentication cycle information, The wireless transmission / reception unit 911 transmits authentication information to which the authentication cycle information is added to the key unit 902. Further, the first wireless transmission / reception unit 911 receives the flag Fβ transmitted from the key unit 902 indicating whether or not the key unit 902 has moved via the antenna 117. On the other hand, if the first control unit 112 does not determine that it is the authentication timing in step ST1105, the processes in steps ST1104 to ST1106 are repeated.

  Next, mobile communication terminal apparatus 901 determines whether or not the communication is successful (step ST1108).

  If the communication is not successful, the mobile communication terminal apparatus 901 repeats the processing from step ST1104 to step ST1108.

  On the other hand, when the communication is successful, the first authentication cycle determination unit 910 determines whether the mobile communication terminal apparatus 901 is stationary based on the flag Fα acquired from the first control unit 112, that is, Fα = 0. It is determined whether or not (step ST1109).

  If Fα = 0 is not satisfied, the first authentication cycle determination unit 910 resets the authentication cycle Pa and sets the authentication cycle Pa to P0 (Pa = P0) (step ST1110).

  On the other hand, when Fα = 0, the first authentication cycle determination unit 910 determines whether the key unit 902 is stationary based on the flag Fβ acquired from the first wireless transmission / reception unit 911, that is, Fβ = 0. Is determined (step ST1111).

  When Fβ = 0 is not satisfied, the first authentication cycle determination unit 910 resets the authentication cycle Pa and sets the authentication cycle Pa to P0 (Pa = P0) (step ST1110).

  On the other hand, when Fβ = 0, the first authentication cycle determination unit 910 weights the stationary condition (step ST1112). Specifically, the first authentication cycle determination unit 910 updates the value of the flag E by adding the weight coefficient We to the flag E (E = E + We).

  Next, the first authentication cycle determination unit 910 determines whether or not the updated flag E (E + We) exceeds the threshold T (E> T?) (Step ST1113).

  If the updated flag E does not exceed the threshold value T, the processing from step ST1104 to step ST1113 is repeated.

On the other hand, when the updated flag E exceeds the threshold value T, the first authentication cycle determination unit 910 extends the authentication cycle (step ST1114). Specifically, the first authentication cycle determination unit 910 adds ΔP to the authentication cycle P and updates the authentication cycle Pa (Pa = P + ΔP). At this time, the first authentication cycle determination unit 910 sets the authentication cycle Pa as the upper limit threshold so that the authentication cycle Pa does not exceed the upper limit threshold when the updated authentication cycle Pa is equal to or higher than the upper limit threshold. .

  Then, after resetting the authentication cycle in step ST1110 or extending the authentication cycle in step ST1114, the processes in steps ST1103 to ST1114 are repeated.

  As described above, according to the fourth embodiment, in addition to the effect of the first embodiment, only the mobile communication terminal apparatus determines the authentication cycle, so that the processing load on the key unit can be reduced.

  The fourth embodiment can be applied to the second embodiment or the third embodiment.

  In the first to fourth embodiments, the first sensor unit 111 and the second sensor units 120 and 920 detect the presence / absence of movement or the amount of movement. When the operation button provided on the mobile communication terminal device or key unit is detected, such as detection of a signal generated when the mobile communication terminal is operated, or the mobile communication terminal device or key unit is moved, or from now on The authentication cycle may be changed by determining that the mobile communication terminal device or the key unit moves. In the first to fourth embodiments, the lower limit value of the authentication cycle is set to the authentication cycle P0 when the power is turned on. However, the present invention is not limited to this. Accordingly, it may be shorter than the authentication cycle P0 when the power is turned on. In the first to fourth embodiments, the first sensor unit 111 and the second sensor unit 120 and 920 such as an acceleration sensor detect the presence or absence of movement or the amount of movement. When a change in base station information or access point information is detected, it may be determined that the mobile communication terminal device or key unit has moved. In this case, a cell ID that is information for identifying a cell can be used as the base station information, and identification information unique to the access point can be used as the access point information. Furthermore, when a change in the topology of the mesh network or a change in the topology of the PAN (personal area network) is detected, it may be determined that the mobile communication terminal device or the key unit has moved.

  The mobile communication device, wireless authentication system, and wireless authentication method according to the present invention are particularly suitable for performing wireless authentication.

The figure which shows the structure of the radio | wireless authentication system which concerns on Embodiment 1 of this invention. FIG. 3 is a flowchart showing a wireless authentication method according to the first embodiment of the present invention. FIG. 3 is a flowchart showing a wireless authentication method according to the first embodiment of the present invention. The figure which shows the structure of the radio | wireless authentication system which concerns on Embodiment 2 of this invention. FIG. 7 is a flowchart showing a wireless authentication method according to the second embodiment of the present invention. FIG. 7 is a flowchart showing a wireless authentication method according to the second embodiment of the present invention. FIG. 7 is a flowchart showing a wireless authentication method according to the third embodiment of the present invention. FIG. 7 is a flowchart showing a wireless authentication method according to the third embodiment of the present invention. The figure which shows the structure of the radio | wireless authentication system which concerns on Embodiment 4 of this invention. FIG. 7 is a flowchart showing a wireless authentication method according to the fourth embodiment of the present invention. FIG. 7 is a flowchart showing a wireless authentication method according to the fourth embodiment of the present invention.

Claims (11)

Movement detection means for detecting movement;
Receiving means for receiving movement information that is information of movement of the communication partner;
Authentication period determining means for determining an authentication period, which is a period for intermittently performing wireless authentication with the communication partner based on the detection result and the movement information in the movement detecting means;
Authentication means for performing authentication with the communication partner in the determined authentication cycle;
A mobile communication device comprising:   The authentication cycle determining means detects the movement by the movement detecting means when the movement detecting means does not detect the movement and the movement information indicating that the communication counterpart does not move, or the communication counterpart The mobile communication device according to claim 1, wherein the authentication cycle is lengthened as compared with a case where the movement information indicating that the movement has been received.   The authentication cycle determination means updates the parameter value for determining the authentication cycle every time the detection result that has not moved and the movement information that the communication partner has not moved are acquired, and the updated parameter The mobile communication device according to claim 1, wherein when the value exceeds a threshold value, the authentication cycle is lengthened compared to when the parameter value is equal to or less than the threshold value. A time zone setting means capable of arbitrarily setting a time zone during which movement is not performed;
The mobile communication device according to claim 3, wherein the authentication period determining unit sets the threshold value different between the set time zone and a time zone other than the time zone.   The mobile communication apparatus according to claim 1, wherein the authentication cycle determining unit determines the authentication cycle based on the detection result indicating presence / absence of movement and the movement information indicating presence / absence of movement of the communication partner.   The mobile communication apparatus according to claim 1, wherein the authentication period determining unit determines the authentication period based on the detection result indicating the movement amount in a predetermined time and the movement information indicating the movement amount of the communication partner in a predetermined time. .   When the movement amount in the detection result is the same as the movement amount of the movement information, the authentication cycle determination means is compared with the case where the movement amount in the detection result is different from the movement amount of the movement information. The mobile communication device according to claim 6, wherein the authentication cycle is lengthened.   When the difference between the amount of movement in the detection result and the amount of movement of the movement information is smaller than a predetermined value, the authentication cycle determination unit determines the amount of movement in the detection result and the amount of movement of the movement information. The mobile communication device according to claim 6, wherein the authentication cycle is lengthened as compared to a case where the difference is equal to or greater than a predetermined value.   The mobile communication device according to claim 1, further comprising a transmission unit configured to transmit information on the authentication cycle determined by the authentication cycle determination unit to the communication partner. A wireless authentication system that performs wireless authentication between a first mobile communication device and a second mobile communication device,
The first mobile communication device detects the movement, and the second mobile communication device with an authentication period determined based on the detection result and movement information that is information on presence / absence of movement of the second mobile communication device. Authenticate with
The second mobile communication device detects the movement, and the first mobile communication device at an authentication cycle determined based on the detection result and movement information that is information on presence / absence of movement of the first mobile communication device. Wireless authentication system that performs authentication with A first mobile communication device detecting movement;
A step of receiving movement information, which is movement information of the second mobile communication device, by the first mobile communication device;
The first mobile communication device determining an authentication cycle, which is a cycle for performing wireless authentication intermittently with the second mobile communication device based on the detection result and the movement information;
Performing authentication at the determined authentication cycle between the first mobile communication device and the second mobile communication device;
A wireless authentication method comprising:

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