JP2009065260A - Wireless communication apparatus, communication terminal apparatus, communication system, and authentication method - Google Patents

Abstract

An object of the present invention is to reduce the time required for the reception operation of a wireless communication device and reduce the power consumption of the wireless communication device. In addition, responsiveness and operability are improved, and power consumption of the communication terminal device is reduced without sacrificing responsiveness and operability.
A receiving unit 121 detects an identification signal transmitted from a communication terminal device 150 by performing carrier sense, and extracts identification information for identifying the communication terminal device 150 included in the detected identification signal. When the identification information that identifies the communication terminal device 150 extracted by the reception unit 121 matches the identification information that is stored in the code storage unit 123, the control unit 122 determines the identification information that identifies the wireless communication device 160. The output is instructed to the code storage unit 123. The transmission unit 124 transmits a response signal including identification information that identifies the wireless communication device 160.
[Selection] Figure 1

Description

  The present invention relates to a wireless communication device, a communication terminal device, a communication system, and an authentication method, for example, a wireless communication device that restricts use when a key that is a communication partner of the communication terminal device exists outside the communication area with the communication terminal device, The present invention relates to a communication terminal device, a communication system, and an authentication method.

  Conventionally, a communication system provided with a security function is known in order to prevent misuse of various functions of the communication terminal device when the communication terminal device is lost (for example, Patent Document 1).

  FIG. 5 is a diagram illustrating a communication system 10 with a security function using the communication terminal device 11 and the wireless communication device 12. As shown in FIG. 5, the communication terminal device 11 does not restrict the use when the wireless communication device 12 that is a key is in a communication area with the communication terminal device 11 (within the broken line in FIG. 5). On the other hand, the communication terminal device 11 restricts use when the wireless communication device 12 exists outside the communication area with the communication terminal device 11 (outside the broken line in FIG. 5).

  FIG. 6 is a diagram showing a conventional operation when the communication terminal apparatus 11 performs a search in the communication system with security function 10 in FIG. 5 in a state where the wireless communication apparatus 12 is outside the communication area with the communication terminal apparatus 11. It is. As shown in FIG. 6, the wireless communication device 12 transmits a signal S1 including identification information every time t2 (for example, 1 sec) elapses. At this time, the time required for transmission of the signal S1 is t1 (for example, 8 msec). On the other hand, the communication terminal device 11 intermittently performs the reception process # 5 during the time t3 (for example, 1 sec) every time the time T1 (for example, 11 sec) elapses. And the communication terminal device 11 restrict | limits use, when the signal S1 of the radio | wireless communication apparatus 12 cannot be detected during time t3. This state that restricts use is called a locked state.

7 shows the communication system 10 with security function in FIG. 5 in which the communication terminal device 11 is in communication with the wireless communication device 12 in a state where the wireless communication device 12 exists in the communication area with the communication terminal device 11. It is a figure which shows the conventional operation | movement in a case. As shown in FIG. 7, the radio communication device 12 transmits a signal S1 including identification information every time time t2 elapses. The communication terminal device 11 receives the signal S1 and transmits an ACK signal S11 as a response to the reception of the signal S1. Then, the wireless communication device 12 receives the ACK signal S11. The communication terminal device 11 performs the above-described series of operations during the time t4. The state in which the communication terminal device 11 is communicating with the wireless communication device 12 is called a lock release state. The time t4 is a fixed time.
JP 2006-20002 A

  However, conventionally, since the communication terminal device 11 is in a state of waiting for reception of the signal S1, the wireless communication device 12 needs to generate and transmit the signal S1 including the identification information. With transmission, there is a problem that the battery of the wireless communication device 12 is consumed quickly. Further, unlike the communication terminal device 11, the wireless communication device 12 that is a key or the like does not communicate with another person's communication terminal apparatus, and therefore is not operated by the user and communicates with the other person's communication terminal apparatus. Does not necessarily exist on the side of Therefore, conventionally, the communication terminal device 11 is in a state of waiting for reception of the signal S1 transmitted from the wireless communication device 12 when it is desired to perform unlocking or authentication with the wireless communication device 12 at an early stage. There is a problem that it takes time to unlock or authenticate with the wireless communication device 12, and the responsiveness and operability are poor. Conventionally, the wireless communication device 12 transmits the signal S1 regardless of the urgency of the unlocking or authentication with the communication terminal device 11, and the communication terminal device 11 performs the reception processing of the signal S1 accordingly. Therefore, there is a problem that the battery of the communication terminal device 11 is consumed quickly.

  The present invention has been made in view of such a point, and the wireless communication device does not transmit a signal including identification information until a signal transmitted from the communication terminal device is detected, and a signal transmitted from the communication terminal device. Is detected by carrier sense, the time required for the reception operation of the wireless communication device can be shortened, and the wireless communication device, the communication terminal device, the communication system, and the authentication method can reduce the power consumption of the wireless communication device. The purpose is to provide. In addition, since the communication terminal device can dominate the transmission timing by first starting signal transmission, it can improve responsiveness and operability, and sacrifice responsiveness and operability. An object of the present invention is to provide a wireless communication device, a communication terminal device, a communication system, and an authentication method that can reduce power consumption of the communication terminal device.

  The wireless communication apparatus of the present invention includes a detection unit that detects reception of an identification signal by intermittently performing carrier sense, a storage unit that stores first identification information that identifies a predetermined communication partner, and the detection unit Control means for instructing transmission of a response signal based on a comparison result between second identification information for specifying a communication partner included in the identification signal detected by the first identification information stored in the storage means; A transmission unit configured to transmit the response signal in accordance with an instruction from the control unit.

  The communication terminal device of the present invention includes a transmission means for intermittently transmitting identification information for identifying the own station at a predetermined timing, and a response signal transmitted from a communication partner that has received the identification information by intermittently performing carrier sense. And detecting means for detecting reception of the communication partner, and authentication means for authenticating the communication partner with identification information for identifying the communication partner included in the response signal detected by the detection means.

  A communication system of the present invention is a communication system comprising a communication terminal device and a wireless communication device that communicates with the communication terminal device within a communication range of the communication terminal device, wherein the communication terminal device A first transmission means for intermittently transmitting an identification signal including the first identification information to be identified at a predetermined timing; and a response signal transmitted from the wireless communication apparatus that has received the identification signal by intermittently performing carrier sensing. First detection means for detecting reception; and authentication means for authenticating the wireless communication apparatus with second identification information for specifying the wireless communication apparatus included in the response signal detected by the first detection means. Then, the wireless communication device preliminarily includes detection means for detecting reception of the identification signal by intermittently performing carrier sense and third identification information for specifying a predetermined communication terminal device. The response signal is transmitted based on a comparison result between the storage means for storing and the first identification information included in the identification signal detected by the detection means and the third identification information stored in the storage means. It adopts a configuration comprising control means for instructing and transmitting means for transmitting the response signal including the second identification information in accordance with an instruction from the control means.

  According to the authentication method of the present invention, the communication terminal device intermittently transmits an identification signal including first identification information for identifying the own station at a predetermined timing, and the wireless communication device intermittently performs carrier sense. A step of detecting reception of the identification signal; and a second identification in which the wireless communication device identifies a predetermined communication terminal device stored in advance in the first identification information and storage means included in the detected identification signal A step of transmitting a response signal including third identification information for identifying the own station based on the comparison result with the information, and the communication terminal device detecting reception of the response signal by intermittently performing carrier sense And the communication terminal device authenticates the wireless communication device with the third identification information included in the detected response signal.

  According to the present invention, the wireless communication device does not transmit the signal including the identification information until the signal transmitted from the communication terminal device is detected, and detects the signal transmitted from the communication terminal device by carrier sense. The time required for the reception operation of the wireless communication device can be shortened, and the power consumption of the wireless communication device can be reduced. In addition, according to the present invention, the communication terminal device can dominate the transmission timing by first starting transmission of signals, so that it is possible to improve responsiveness and operability as well as responsiveness and operation. The power consumption of the communication terminal device can also be reduced without sacrificing performance.

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

(Embodiment)
FIG. 1 is a diagram showing a configuration of a communication system 100 according to an embodiment of the present invention. As shown in FIG. 1, the communication system 100 includes a communication terminal device 150 and a wireless communication device 160. The communication terminal device 150 is a mobile phone, for example. The wireless communication device 160 is a key that restricts the use of the communication terminal device 150 when it exists outside the communication range of the communication terminal device 150, for example.

  First, the configuration of communication terminal apparatus 150 will be described with reference to FIG. The operation unit 170 includes an open / close detection unit 101 and a key operation unit 102. The control unit 180 includes an authentication state determination unit 110.

  When the communication terminal device 150 includes a foldable case, the open / close detection unit 101 detects a change in the state of the case from the folded state to the open state, and outputs the detection result to the timing control unit 105. To do.

  The key operation unit 102 detects a key operation for starting communication, and outputs a detection result to the timing control unit 105.

  The clock unit 103 measures time.

  The communication quality measuring unit 104 measures the communication quality with the wireless communication device 160 using the received signal input from the receiving unit 109. For example, the communication quality measuring unit 104 measures a received signal strength indicator (RSSI) indicating the communication quality from the received signal input from the receiving unit 109. Then, the communication quality measuring unit 104 outputs the measurement result to the timing control unit 105.

  The timing control unit 105 controls the timing at which authentication is started by instructing the identification information storage unit 106 to output identification information. Specifically, the timing control unit 105 detects when the detection result that the state of the casing has changed from the folded state to the opened state is input from the open / close detection unit 101 or when the key operation unit 102 operates the key. When the result is input, an instruction to output the identification information of the wireless communication device 160 stored in the identification information storage unit 106 is given. In addition, when the time measured by the clock unit 103 is daytime (for example, from 6 am to 6 pm), the timing control unit 105 sets the time measured by the clock unit 103 to nighttime. Compared to the case (for example, the time from 6 pm to 6 am on the next day), the output of the identification information stored in the identification information storage unit 106 is instructed in a short cycle. Further, the timing control unit 105 instructs the output of the identification information stored in the identification information storage unit 106 in a shorter cycle as the communication quality input from the communication quality measurement unit 104 becomes better.

  The identification information storage unit 106 stores in advance identification information for specifying the communication terminal device 150 and identification information for specifying the wireless communication device 160. Then, the identification information storage unit 106 outputs identification information for identifying the stored communication terminal device 150 to the transmission unit 107 in accordance with an instruction from the timing control unit 105. Here, the identification information that identifies the communication terminal device 150 is, for example, an ID unique to each communication terminal device 150. The identification information that identifies the wireless communication device 160 is, for example, an ID unique to the wireless communication device 160.

  The transmission unit 107 generates an identification signal including identification information specifying the communication terminal device 150 input from the identification information storage unit 106. Then, transmitting section 107 outputs the generated identification signal to antenna 108. Transmitting section 107 generates an ACK signal according to instructions from receiving section 109 and outputs the generated ACK signal to antenna 108.

  The antenna 108 intermittently transmits the identification signal input from the transmission unit 107. The antenna 108 transmits the ACK signal input from the transmission unit 107. Further, the antenna 108 receives the response signal or synchronization establishment signal transmitted from the wireless communication apparatus 160 and outputs the received response signal or synchronization establishment signal to the reception unit 109.

  The receiving unit 109 serving as a detecting unit detects the presence / absence of a response signal transmitted from the wireless communication apparatus 160 in the received signal input from the antenna 108 by intermittently performing carrier sense. In addition, when detecting the response signal, the reception unit 109 extracts identification information that identifies the wireless communication device 160 included in the response signal, and outputs the extracted identification information to the authentication state determination unit 110. Since the receiving unit 109 only monitors the level of the received signal during the carrier sense, the power consumption can be suppressed as compared with the case where the identification information extraction process is performed. In addition, receiving section 109 outputs the received signal input from antenna 108 to communication quality measuring section 104. Further, when the synchronization establishment signal is input from the antenna 108, the reception unit 109 instructs the transmission unit 107 to transmit an ACK signal.

  When the identification information for identifying the wireless communication device 160 is input from the reception unit 109, the authentication state determination unit 110 as the authentication unit matches the input identification information with the identification information stored in the identification information storage unit 106. An authentication process, which is a process for determining whether or not to perform, is performed. The authentication state determination unit 110 restricts the operation in the operation unit 170 when authentication fails, that is, when it is determined that the identification information does not match. On the other hand, the authentication state determination unit 110 does not restrict the operation on the operation unit 170 when the authentication is successful, that is, when it is determined that the identification information matches.

  Next, the configuration of wireless communication apparatus 160 will be described using FIG.

  The antenna 120 receives the identification signal or the ACK signal and outputs it to the receiving unit 121. The antenna 120 transmits the response signal or synchronization establishment signal input from the transmission unit 124.

  The receiving unit 121 as detection means performs carrier sense on the received signal input from the antenna 120 and detects the presence / absence of the identification signal transmitted from the communication terminal device 150. In addition, when detecting the identification signal, the receiving unit 121 extracts identification information that identifies the communication terminal device 150 from the detected identification signal, and outputs the extracted identification information to the control unit 122. The receiving unit 121 repeats carrier sense when it does not detect the identification signal transmitted from the communication terminal device 150. The reception unit 121 only monitors the level of the reception signal during carrier sense, and does not extract identification information. In addition, receiving section 121 outputs the ACK signal input from antenna 120 to control section 122.

  Based on the comparison result between the identification information that identifies the communication terminal device 150 input from the reception unit 121 and the identification information that identifies the predetermined communication terminal device stored in advance in the code storage unit 123, the control unit 122 The code storage unit 123 is instructed to output identification information of the wireless communication device 160. For example, when the communication terminal device specified by the identification information input from the reception unit 121 matches the communication terminal device specified by the identification information stored in the code storage unit 123, the control unit 122 The storage unit 123 is instructed to output identification information of the wireless communication device 160. In addition, when an ACK signal is input from the reception unit 121, the control unit 122 shifts to an initial authentication operation and establishes synchronous communication.

  The code storage unit 123 serving as a storage unit stores identification information that identifies the communication terminal device 150 and identification information that identifies the wireless communication device 160. Then, the code storage unit 123 outputs identification information for specifying the stored wireless communication device 160 to the transmission unit 124 in accordance with an instruction from the control unit 122.

  The transmission unit 124 generates a synchronization establishment signal including identification information specifying the wireless communication device 160 input from the code storage unit 123, and outputs the generated synchronization establishment signal to the antenna 120.

  Next, operations of communication terminal apparatus 150 and wireless communication apparatus 160 will be described.

  First, operations of communication terminal apparatus 150 and wireless communication apparatus 160 in the locked state will be described with reference to FIG. FIG. 2 is a diagram illustrating operations of the communication terminal device 150 and the wireless communication device 160.

  The communication terminal device 150 stores in the identification information storage unit 106 when the open / close detection unit 101 detects a change in the state of the housing from the folded state to the opened state, or when the key operation unit 102 detects a key operation. The signal S200 including the identification information for specifying the communication terminal device 150 that is performing is transmitted for a time t3 (t2 <t3). Thus, the communication terminal device 150 can dominate the timing of transmitting the signal S200.

  Then, after transmitting for time t3, communication terminal apparatus 150 performs carrier sense # 202 for t4 hours (for example, 1 sec) at reception unit 109. Communication terminal apparatus 150 repeats transmission of signal S200 for time t3 and carrier sense # 202 for t4 time at a period of time T2 (for example, 11 sec). At this time, the communication terminal device 150 may continuously repeat the transmission of the signal S200 for the time t3 and the carrier sense # 202 for the time t4, or the next signal after the time t5 has elapsed since the signal S200 was transmitted. S200 may be transmitted.

  Further, every time t2 (for example, 1 sec) elapses, the wireless communication apparatus 160 performs carrier sense # 201 for t1 ′ time (for example, 0.3 msec) in the reception unit 121. At this time, the receiving unit 121 of the wireless communication device 160 only performs carrier sense for monitoring the level of the received signal, so that the time t1 ′ required for the reception processing of the wireless communication device 160 can be shortened.

  In the case of FIG. 2, the wireless communication device 160 is outside the communication area of the communication terminal device 150, and thus does not detect the signal S <b> 200 with the carrier sense # 201.

  Next, operations of communication terminal apparatus 150 and wireless communication apparatus 160 when shifting from the locked state to the unlocked state will be described with reference to FIG. FIG. 3 is a diagram illustrating operations of the communication terminal device 150 and the wireless communication device 160.

  First, communication terminal apparatus 150 transmits signal S200. Next, wireless communication apparatus 160 detects signal S200 by carrier sense # 201. Next, when the identification information included in the detected signal S200 matches the identification information stored in the code storage unit 123, the wireless communication device 160 includes a synchronization establishment signal including the identification information after the elapse of time t2. S301 is transmitted.

  Next, communication terminal apparatus 150 detects synchronization establishment signal S301 by carrier sense # 202. Next, when the identification information specifying the wireless communication device 160 included in the detected synchronization establishment signal S301 matches the identification information stored in the identification information storage unit 106, the communication terminal device 150 detects the synchronization establishment signal. An ACK signal S302 is transmitted as a response to S301. Next, the wireless communication device 160 receives the ACK signal S302. Thereby, the communication terminal apparatus 150 can shift to the initial authentication operation.

  In FIG. 3, the communication terminal apparatus 150 has been described with respect to detecting the synchronization establishment signal S301 transmitted from one wireless communication apparatus 160. However, the present invention is not limited to this, and a plurality of signals that have received the signal S200 are received. It is also possible to detect the synchronization establishment signal S301 transmitted from the wireless communication device 160.

  Next, operations of communication terminal apparatus 150 and wireless communication apparatus 160 after unlocking will be described with reference to FIG. FIG. 4 is a diagram illustrating operations of the communication terminal device 150 and the wireless communication device 160.

  First, communication terminal apparatus 150 transmits signal S401 including identification information. Next, the wireless communication device 160 detects the signal S401 by carrier sense # 402. Next, when the identification information included in the detected signal S401 matches the identification information stored in the code storage unit 123, the wireless communication device 160 transmits a signal S403 including the identification information. Next seal, communication terminal apparatus 150 receives signal S403 by carrier sense # 404. Thus, the communication terminal device 150 can dominate the timing of transmitting the signal S401. In addition, since the reception unit 121 of the wireless communication apparatus 160 only performs carrier sense # 402 for monitoring the level of the reception signal, the time required for the reception process of the wireless communication apparatus 160 can be shortened.

  In FIG. 4, the wireless communication device 160 performs carrier sense # 402 at an interval of time t3. A series of operations from when the communication terminal apparatus 150 transmits the signal S401 to when the signal S403 is detected by the carrier sense # 404 is performed at a period of time t5.

  Here, the communication terminal apparatus 150 can variably set the time t5. For example, the time t5 in the daytime can be made shorter than the time t5 at night than the time measured by the clock unit 103. Further, the communication terminal apparatus 150 may determine that the wireless communication apparatus 160 is closer as the communication quality measured by the communication quality measurement unit 104 becomes better, and shorten the time t5 as the communication quality becomes better. it can.

  In FIG. 4, the communication terminal device 150 has been described with respect to the case where the signal S403 transmitted from one wireless communication device 160 is detected. However, the present invention is not limited to this, and a plurality of wireless communication devices that have received the signal S401 have been described. It is also possible to detect the signal S403 transmitted from the device 160.

  As described above, according to the present embodiment, the wireless communication device does not transmit a signal including identification information until it detects a signal transmitted from the communication terminal device, and transmits the signal transmitted from the communication terminal device as a carrier. Since detection is performed by sensing, the time required for the reception operation of the wireless communication device can be shortened, and the power consumption of the wireless communication device can be reduced. In addition, according to the present embodiment, the communication terminal apparatus can dominate the transmission timing by first starting transmission of signals, so that it is possible to improve responsiveness and operability, and to improve responsiveness. In addition, the power consumption of the communication terminal device can be reduced without sacrificing operability.

  In the above embodiment, the communication terminal device 150 transmits the identification signal when detecting a change in the state of the housing from the folded state to the opened state, or when detecting a key operation. Not limited to this, the communication terminal device 150 can transmit the identification signal at an arbitrary timing as necessary, such as transmitting the identification signal at a predetermined time.

  The wireless communication device, communication terminal device, communication system, and authentication method of the present invention are suitable for restricting use when, for example, a key that is a communication partner of the communication terminal device exists outside the communication area with the communication terminal device. .

The block diagram which shows the structure of the communication system which concerns on embodiment of this invention. The figure which shows operation | movement of the communication terminal device and radio | wireless communication apparatus which concern on embodiment of this invention The figure which shows operation | movement of the communication terminal device and radio | wireless communication apparatus which concern on embodiment of this invention The figure which shows operation | movement of the communication terminal device and radio | wireless communication apparatus which concern on embodiment of this invention Diagram showing communication system with security function The figure which shows operation | movement of the conventional communication terminal device and a radio | wireless communication apparatus The figure which shows operation | movement of the conventional communication terminal device and a radio | wireless communication apparatus

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Communication system 101 Open / close detection part 102 Key operation part 103 Clock part 104 Communication quality measurement part 105 Timing control part 106 Identification information storage part 107,124 Transmission part 108,120 Antenna 109,121 Reception part 110 Authentication state determination part 122 Control part 123 code storage unit 150 communication terminal device 160 wireless communication device

Claims (10)

Detecting means for detecting reception of the identification signal by intermittently performing carrier sense;
Storage means for storing in advance first identification information for specifying a predetermined communication partner;
Control for instructing transmission of a response signal based on a comparison result between second identification information for identifying a communication partner included in the identification signal detected by the detection means and the first identification information stored in the storage means Means,
Transmitting means for transmitting the response signal in accordance with an instruction of the control means;
A wireless communication apparatus comprising:   The control means instructs transmission of the response signal when the comparison result in which the communication partner specified by the first identification information matches the communication partner specified by the second identification information is obtained. Item 2. The wireless communication device according to Item 1. Transmitting means for intermittently transmitting identification information for identifying the own station at a predetermined timing;
Detecting means for detecting reception of a response signal transmitted from a communication partner that has received the identification information by performing carrier sense intermittently;
Authentication means for authenticating the communication partner with identification information for identifying the communication partner included in the response signal detected by the detection means;
A communication terminal device comprising: Communication quality measuring means for measuring communication quality in communication with the communication partner;
Timing control means for shortening the transmission interval of identification information identifying the own station as the measured communication quality is better;
The communication terminal device according to claim 3, further comprising: A key operation detecting means for detecting a key operation;
Timing control means for starting transmission of identification information for identifying the own station when the key operation is detected;
The communication terminal device according to claim 3, further comprising: An open / close detection means for detecting a state change from a folded state to an opened state in a foldable housing;
Timing control means for starting transmission of identification information for identifying the own station when the state change is detected;
The communication terminal device according to claim 3, further comprising:   The detection unit can detect reception of the response signals transmitted from a plurality of the communication partners with respect to one transmission of identification information specifying the own station by carrier sense. The communication terminal device according to claim 1.   The communication terminal device according to claim 3, wherein the authentication unit restricts use when the authentication fails. A communication system comprising: a communication terminal device; and a wireless communication device that communicates with the communication terminal device within a communication range of the communication terminal device,
The communication terminal device
First transmission means for intermittently transmitting an identification signal including first identification information for identifying the own station at a predetermined timing;
First detection means for detecting reception of a response signal transmitted from the wireless communication apparatus that has received the identification signal by intermittently performing carrier sense;
Authentication means for authenticating the wireless communication device with second identification information for identifying the wireless communication device included in the response signal detected by the first detection means;
Comprising
The wireless communication device
Detecting means for detecting reception of the identification signal by intermittently performing carrier sense;
Storage means for storing in advance third identification information for specifying a predetermined communication terminal device;
Control means for instructing transmission of the response signal based on a comparison result between the first identification information included in the identification signal detected by the detection means and the third identification information stored in the storage means;
Transmitting means for transmitting the response signal including the second identification information in accordance with an instruction of the control means;
A communication system comprising: A step in which the communication terminal device intermittently transmits an identification signal including first identification information for identifying the own station at a predetermined timing;
A step in which a wireless communication device detects reception of the identification signal by intermittently performing carrier sense;
Based on the comparison result between the first identification information included in the detected identification signal and the second identification information specifying a predetermined communication terminal device stored in advance in the storage means, the wireless communication device Transmitting a response signal including third identification information for identifying
The communication terminal device detecting reception of the response signal by intermittently performing carrier sense;
The communication terminal device authenticating the wireless communication device with the third identification information included in the detected response signal;
An authentication method comprising:

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