Wireless communication device and wireless communication method

Abstract

To provide the contents of encrypted information to a user who uses a wireless communication terminal device without a decryption function when performing group communication.SOLUTION: A wireless communication device is capable of communication within a group consisting of a plurality of wireless communication devices. The wireless communication device includes: a communication unit that transmits and receives signals to and from other wireless communication devices; a communication control unit that acquires identification information, response signals, and location information of the other wireless communication devices belonging to the group; a storage unit that stores the identification information and the location information; an identification unit that identifies a recommended device from the location information of a wireless communication device having a decryption function and the location information of a notification required device, which is a wireless communication device not having the decryption function; and a guidance information generation unit that generates guidance information from the notification required device to the recommended device.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a wireless communication device and a wireless communication method. [Background technology]

[0002] In a wireless communication system, a failure in decryption of received encrypted data is detected, and Techniques for recovering failed encrypted data are known (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5036868 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, a failure in decryption of encrypted data is detected, and the encryption that has failed to be decrypted is notified. A technology for recovering data is disclosed. This technology is implemented when a wireless communication device has a decoding function. Therefore, in group communication between wireless communication devices, When a wireless communication device transmits encrypted data, a wireless communication device without a decryption function If the device is in the loop, the contents of the encrypted data will not be transmitted to the user of the wireless communication device. There is a problem that...

[0005] The present invention uses a wireless communication terminal device that does not have a decoding function when performing group communication. The encrypted data can be provided to users without leaking the contents to third parties. The present invention aims to provide a wireless communication device and a wireless communication method that can achieve this. [Means for solving the problem]

[0006] The wireless communication device of the present invention is a wireless communication device capable of communication within a group consisting of a plurality of wireless communication devices. A wireless communication device comprising: a communication unit for transmitting and receiving signals to and from another wireless communication device; a communication control unit that acquires identification information, a response signal, and location information of other wireless communication devices belonging to the a storage unit for storing identification information and location information; and a wireless communication device having a decoding function and a location information storage unit for storing identification information and location information. The device that needs to be notified is identified based on the location information of the notification-required device, which is a wireless communication device that does not have a decoding function. and a guidance information generating unit that generates guidance information from the notification requiring device to the recommended device. The communication control unit controls the communication unit to transmit the encrypted data, and then transmits the encrypted data to the notification-required device. The identification unit receives a response signal indicating that the data cannot be decoded, and Based on the identification information, the location information, and the response signal acquired by the communication control unit during a predetermined period of time, The recommended device is identified, and the guidance information generating unit generates a guidance information based on the location information of the notification-requiring device and the location information of the recommended device. The communication control unit controls the communication unit to generate guidance information based on the notification request information. and send.

[0007] The wireless communication method of the present invention is a wireless communication method capable of communicating within a group consisting of a plurality of wireless communication devices. A wireless communication method for a wired communication device that transmits and receives signals to and from another wireless communication device. and receiving the identification information, response signal, and location information of other wireless communication devices belonging to the group. The method includes the steps of: acquiring the identification information and the position information; storing the identification information and the position information; and decoding the identification information and the position information. Location information of a wireless communication device and location information of a notification-required device that is a wireless communication device without a decoding function and generating guidance information from the notification-requiring device to the recommended device. and a step of transmitting guidance information to a notification-required device, The step of determining whether the encrypted data can be decrypted from the notification-required device after transmitting the encrypted data. and receiving a response signal indicating that the device is in a good condition, and The step of identifying a recommended device based on the response signal acquired during the step of generating guidance information includes: Guidance information is generated based on the location information of the notification-required device and the location information of the recommended device, and the guidance information is The notification is transmitted to a device requiring notification. Effect of the Invention

[0008] According to the present invention, when performing group communication, a wireless communication terminal device having no decoding function Provide users with encrypted information without leaking it to third parties. It is possible. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram for explaining a wireless communication system according to each embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram for explaining a wireless communication system according to each embodiment of the present invention. [Diagram 3] FIG. 3 is a block diagram showing an example of a configuration of a wireless communication device according to each embodiment of the present invention. [Figure 4] FIG. 4 is a diagram for explaining group information stored in the wireless communication device according to each embodiment of the present invention. [Diagram 5] FIG. 5 is a block diagram showing an example of the configuration of a wireless communication device without a combination function according to each embodiment of the present invention. [Figure 6] FIG. 6 is a sequence diagram showing an example of the flow of group communication processing according to the first embodiment of the present invention. [Figure 7]FIG. 7 is a flowchart showing an example of a process flow of a wireless communication device on the transmitting side in group communication according to the first embodiment of the present invention. [Figure 8] FIG. 8 is a flowchart showing an example of a process flow of a wireless communication device on the receiving side in group communication according to the first embodiment of the present invention. [Figure 9] FIG. 9 is a sequence diagram showing an example of the flow of group communication processing according to the second embodiment of the present invention. [Figure 10] FIG. 10 is a flowchart showing an example of a process flow of a wireless communication device on the transmitting side in group communication according to the second embodiment of the present invention. [Figure 11] FIG. 11 is a flowchart showing an example of a process flow of a wireless communication device on the receiving side in group communication according to the second embodiment of the present invention. [Figure 12] FIG. 12 is a sequence diagram showing an example of the flow of group communication processing according to a modification of the second embodiment of the present invention. [Figure 13] FIG. 13 is a flowchart showing an example of a process flow of a wireless communication device on the transmitting side in group communication according to a modification of the second embodiment of the present invention. [Figure 14] FIG. 14 is a flowchart showing an example of a process flow of a receiving wireless communication device in group communication according to a modification of the second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the embodiment, and when there are multiple embodiments, each embodiment The embodiments may be combined. The same reference numerals are used to denote the same components, and duplicated explanations will be omitted. [Wireless communication system] The configuration of a wireless communication system according to an embodiment of the present invention will be described with reference to FIG. 1 and FIG. 2. 1 and 2 are diagrams illustrating a configuration of a wireless communication system according to an embodiment of the present invention. This is a diagram for

[0011] As shown in FIG. 1, the wireless communication system 1 includes, for example, a wireless communication device 10a and The wireless communication device 10b, the wireless communication device 10c, the wireless communication device 10d, and the wireless communication device 10e. The wireless communication devices 10a to 10e each belong to the same group. The wireless communication devices 10a to 10d are within a predetermined range R (for example, a few kilometers In the example shown in Figure 1, For example, the wireless communication device 10a transmits the encrypted data from the wireless communication device 10b to the wireless communication device 10e. The wireless communication device 10b to the wireless communication device 10e transmit the encrypted data. Therefore, the wireless communication device 10b has a function of decoding the data. The wireless communication device 10e can decrypt the encrypted data received from the wireless communication device 10a. As a result, the users of the wireless communication devices 10b to 10e can The contents of the information being transmitted can be known without being disclosed to third parties. The communication devices 10a to 10e may be collectively referred to as the wireless communication devices 10. .

[0012] On the other hand, the wireless communication system 1 shown in FIG. 2 includes, for example, a wireless communication device 10a and a wireless communication device 10b, a wireless communication device 10c, a wireless communication device 10d, a wireless communication device 10e, and The wireless communication device 20 includes the wireless communication device 10a and the wireless communication device 10b. 0e. However, the wireless communication device 20 Therefore, when the wireless communication device 20 receives the encrypted data, Even if the encrypted data were encrypted, it would be impossible to decrypt it. Therefore, in this embodiment, The device 10a transmits to the wireless communication device 20 the user of the wireless communication device 20 the encrypted data. Here, the information transmitted is simply transmitted without a reference number. When the term “communication device” is used, it refers collectively to the wireless communication device 10 and the wireless communication device 20. For example, the other wireless communication devices include the wireless communication devices 10 and wireless 1 and 2. Either or both of the wireless communication devices in the wireless communication device 20 are shown. [Wireless communication device] An example of the configuration of a wireless communication device according to an embodiment of the present invention will be described with reference to FIG. 1 is a block diagram showing an example of a configuration of a wireless communication device according to an embodiment of the present invention.

[0013] As shown in FIG. 3, the wireless communication device 10 is a GPS (Global Positioning System) receiver. A reception unit 11, a communication unit 12, a storage unit 13, an operation unit 14, a display unit 15, and a control unit 16. The wireless communication device 10 shown in FIG. It is a communication device.

[0014] The GPS receiving unit 11 is composed of a GPS receiving circuit, a GPS receiving antenna, etc. The GPS receiver 11 receives a GPS signal. The GPS receiver 11 transmits the received GPS signal to the location information acquisition unit 16. Output to 2.

[0015] The communication unit 12 executes wireless communication with other wireless communication devices. 2 transmits various information to other wireless communication devices and receives various information from other wireless communication devices. The various types of information include audio data, still image data, video data, The data includes various data including document data. There is no particular restriction on the type of data to be received. The communication unit 12 may, for example, perform short-distance wireless communication. The communication unit 1 may have a function to perform a long-distance wireless communication. 2 is composed of communication circuits, etc.

[0016] The storage unit 13 stores various information. For example, the storage unit 13 stores The storage unit 13 stores past and current position information of the wireless communication device 10. Group information about the group to which the user belongs is stored. This includes information associated with the device names, user names, location information, etc. of other wireless communication devices that are connected to the The storage unit 13 may store map information. The storage unit 13 may be, for example, a RAM ( Semiconductor memory elements such as Random Access Memory (RAM) and Flash Memory This can be achieved by using a computer, a hard disk, a solid-state drive, or other storage device. can.

[0017] The group information stored in the storage unit 13 will be described with reference to FIG. 10 is a diagram for explaining group information stored in a memory unit 13. FIG.

[0018] As shown in FIG. 4, the group information includes information on each wireless communication device included in the wireless communication system 1. This includes items such as "Device Name", "User Name", "Location Information", and "Decryption Function". can be.

[0019] The "device name" is identification information for identifying each wireless communication device. In the example shown in FIG. The device names of the wireless communication devices 10b to 10e are respectively set to the second wireless communication device. The device name of the wireless communication device 20 is the sixth wireless communication device. The "device name" may be an individually identifiable terminal ID (identifier). good.

[0020] The "user name" is identification information for identifying a user who uses each wireless communication device. In the example shown in FIG. 4, the user name of the user who uses the second wireless communication device is “B.” As shown.

[0021] The "location information" indicates the location of each wireless communication device at the time the location information is transmitted. In this example, the position of the second wireless communication device is shown to be "P2". "P2" shows information such as longitude and latitude, address, etc.

[0022] "Decryption function" refers to the function that each wireless communication device has to decrypt encrypted data. For example, if the device has a decryption function, it is marked "Yes." If the device does not have the decoding function, it indicates "none."

[0023] The group information is not limited to the example shown in FIG. 4. The storage unit 13 has a decoding function. Those that include only wireless communication devices with decoding capabilities, and those that include only wireless communication devices without decoding capabilities. Also, the user name may be omitted as group information, and the device name may be stored separately. and the location information and the decoding function.

[0024] Returning to FIG. 3, the operation unit 14 accepts various operations for the control unit 16. For example, the decryption function can be switched on and off, and the data transmission status and data The operation unit 14 outputs an operation signal according to the received operation. The operation unit 14 outputs a signal to the operation control unit 165. The operation unit 14 is, for example, a physical switch or a display unit. The touch panel provided at 15 can accept user operations.

[0025] The display unit 15 displays various images that constitute the user interface. For example, the display unit 1 displays information about a group to which the wireless communication device 10 belongs. 5 is, for example, a liquid crystal display (LCD) or an organic electroluminescence (EL) display. The display unit 15 is a display including an electroluminescence (EL) display. For example, it may include a light emitting unit such as an LED (Light Emitting Diode).

[0026] The control unit 16 is, for example, a CPU (Central Processing Unit) or an MPU (Micro Processor). A program (for example, the present invention) stored in a storage unit (not shown) is The program is executed using RAM or the like as a work area. The control unit 16 is a controller, for example, an application specific integrated circuit (ASIC). Specific Integrated Circuit) and FPGA (Field Programmable Gate Array) It may be realized by an integrated circuit such as the above.

[0027] The control unit 16 includes a device information acquisition unit 161, a location information acquisition unit 162, and a communication control unit 163. a storage control unit 164, an operation control unit 165, a display control unit 166, and a specification unit 167, The device includes an encryption unit 168, a decryption unit 169, and a guide information generation unit 170.

[0028] The device information acquisition unit 161 acquires various information related to other wireless communication devices. The acquisition unit 161 acquires, for example, the device name of another wireless communication device received by the communication unit 12 and the wireless The device information acquisition unit 161 acquires the name of the user who uses the communication device, location information, etc. For example, the identification information indicating whether or not the other wireless communication device has the identification information is acquired. The information on other wireless communication devices acquired by the device information acquisition unit 161 is not limited to these. stomach.

[0029] The location information acquisition unit 162 acquires the current location information of the wireless communication device 10. The acquisition unit 162 acquires the wireless communication device based on the GPS signal received by the GPS receiving unit 11, for example. Obtain the current location information of station 10.

[0030] The communication control unit 163 controls the communication unit 12 to communicate with the wireless communication device 10 and other wireless communication devices. The communication control unit 163 controls communication between the other wireless communication device and the When a response request signal to turn on the encryption function is received, the wireless communication device 10 The name, user name, and current location information are transmitted to another wireless communication device to control the decoding unit 169. The communication control unit 163 controls the decryption function to be turned on. The identification information indicating that the device is connected to the receiving device is transmitted as a first response signal (for example, an ACK (Acknowledgement)). The communication control unit 163 also transmits the first response signal to another wireless communication device. The device name of the communication device 10, the user name, and the current location information are sent to other wireless communication devices. You may believe it.

[0031] The communication control unit 163 controls the communication unit 12 to transmit various data to other wireless communication devices, for example. The communication control unit 163 controls the communication unit 12 to, for example, The data encrypted by the encryption unit 168 is transmitted to and received from other wireless communication devices.

[0032] The memory control unit 164 stores various information in the memory unit 13. For example, For example, information about other wireless communication devices acquired by the device information acquisition unit 161 is stored in the storage unit 13. The storage control unit 164 stores, for example, the wireless communication device 10 information acquired by the position information acquisition unit 162. The position information is stored in the storage unit 13.

[0033] The memory control unit 164 reads out various information from the memory unit 13. For example, the memory control unit 164 For example, information about other wireless communication devices stored in the storage unit 13 is read. For example, the unit 164 reads information about the wireless communication device 10 stored in the storage unit 13. put out.

[0034] The operation control unit 165 controls various operations in accordance with an operation signal from the operation unit 14, i.e., a user operation. For example, the operation control unit 165 controls the user operation of the wireless communication device 10. This allows you to switch between data transmission and reception states, and to decrypt encrypted data. It switches the decryption function between on and off.

[0035] The display control unit 166 causes various images to be displayed on the display unit 15. For example, the display control unit 166 For example, a list of users participating in group communication is displayed on the display unit 15. Display Control The unit 166 displays, for example, various data decoded by the decoding unit 169 on the display unit 15. Display it.

[0036] The identification unit 167 identifies the wireless communication device 10 based on the group information as shown in FIG. The identification unit 167 identifies, for example, a wireless communication device that is performing group communication. The determination unit 167 determines the wireless communication device 10 having the decoding function as a recommended device. For example, among wireless communication devices performing group communication, those that do not have a decoding function The wireless communication device 20 is identified as a notification-required device. In other words, the identification unit 167 The other wireless communication device 10 that transmitted the response signal is identified as a recommended device, and a second response signal is transmitted. The other wireless communication device 20 is identified as a notification-required wireless device. This is a response signal notifying that the identification unit 1 does not have the decoding function. 67 specifies the fifth wireless communication device as a recommended device from the second wireless communication device, Identify the device as a notifiable device.

[0037] The identification unit 167 may identify a plurality of other wireless communication devices 10 as the recommended device, or may identify only one. Specifically, the specification unit 167 may specify only one wireless communication device as a recommended device. 0b through 10e may all be identified as recommended terminals.

[0038] When only one device is to be the recommended device, the specifying unit 167 identifies the wireless communication device 20 and the wireless communication device The distance between the wireless communication device 10e and the wireless communication device 10b is calculated based on the position information. The identification unit 167 then identifies the wireless communication device that is located closest to the wireless communication device 20. 10 is identified as the recommended device.

[0039] The identification unit 167 notifies a plurality of other wireless communication devices that are performing group communication of a notification-required device. When multiple notification-requiring devices are included, a recommended device is identified for each of the multiple notification-requiring devices.

[0040] The encryption unit 168 performs encryption processing on various data to be transmitted to other wireless communication devices. The encryption process is then performed to generate the encrypted data.

[0041] The decryption unit 169 decrypts encrypted data received from another wireless communication device. The decoding function of the decoder 169 is switched between an on state and an off state according to an instruction from the controller 16. For example, the decryption function of the decryption unit 169 is used when secret communication between groups is being performed. It is in the off state when no group is present and is switched to the on state when confidential communication between groups is required. Alternatively, the number of the inputs may be changed.

[0042] The guide information generating unit 170 generates a guide information based on the position information of the wireless communication device 20 and the position information of the recommended device. Based on the information, guidance information is generated for guiding a user of the wireless communication device 20 to the recommended device. The guidance information includes the distance and the direction from the position of the wireless communication device 20 to the position of the recommended device. The guidance information generating unit 170 may include the location information of the wireless communication device 20 and the location information of the recommended device. Based on the information and the map information stored in the memory unit 13, navigation to the recommended device is performed. In this case, for example, the wireless communication device 2 may generate the guide information. The display control unit 166 of the wireless communication device 20 stores the map information in the display control unit 166. The location of the recommended device is plotted on a map, and a route from the wireless communication device 20 to the recommended device is shown. It may be arranged to do so. [Wireless communication device] An example of the configuration of a wireless communication device according to an embodiment of the present invention will be described with reference to FIG. 1 is a block diagram showing an example of a configuration of a wireless communication device according to an embodiment of the present invention.

[0043] As shown in FIG. 5, the wireless communication device 20 includes a GPS receiver 11, a communication unit 12, and a storage unit. The wireless communication device 10 includes a wireless communication unit 13, an operation unit 14, a display unit 15, and a control unit 16A. The device 20 is a wireless communication device that does not have encryption and decryption functions.

[0044] In the wireless communication device 20, the control unit 16A includes a determination unit 167, an encryption unit 168, and a decryption unit 169. 69 and the guide information generating unit 170. is.

[0045] For example, the communication control unit 163 receives a command from another wireless communication device to turn on the decoding function. When a response request signal is received, the device name of the wireless communication device 20, the user name, and the current location The communication control unit 163 returns the information to the other wireless communication device that is the sender. The identification information indicating that the device does not have the capability is transmitted as a second response signal (e.g., a NACK (Negative Acknowledgement) signal). The communication control unit 163 also returns the received notification to the other wireless communication device that sent the received notification. For example, the second response signal may include the device name of the wireless communication device 20, the user name, and the current location information. The received message may be sent back to the other wireless communication device that sent the message, including the above.

[0046] The communication control unit 163, for example, determines whether encrypted data is being received from another wireless communication device. The communication control unit 163 determines whether or not the data received from the other wireless communication device is encrypted. If the header information indicating encrypted data is included, the encrypted data is It is determined that the received signal has been received.

[0047] For example, when encrypted data is received from another wireless communication device, the display control unit 166 The display unit 15 is illuminated to notify the user that the encrypted data has been received. The display unit 15 that is caused to emit light by the display control unit 166 may be a display or an LED. stomach.

[0048] The display control unit 166 displays, for example, the position information of the recommended device received by the wireless communication device 20. The display control unit 166 displays, for example, the guidance received from the wireless communication device 10. According to the information, guidance information for guiding the user who uses the wireless communication device 20 to the recommended device is provided. The display unit 15 displays the information acquired from the guide information generating unit 170 of the wireless communication device 10. An image plotting the locations of the recommended devices based on map information may be displayed on the display unit 15. The map information acquired from the guide information generating unit 170 and the route from the wireless communication device 20 to the recommended device are Based on the road information, the route from the wireless communication device 20 to the recommended device is superimposed on the map. may be generated and displayed on the display unit 15.

[0049] The storage unit 13 may store, for example, a route from the wireless communication device 20 to the recommended device in a superimposed manner. Store map information.

[0050] The guide information generating unit 170 of the wireless communication device 10 generates the guide information received by the wireless communication device 20 as Based on the map information stored in the storage unit 13, information of the required range is acquired, and the display control unit 1 In addition, when navigation information is received as guidance information, the wireless communication device Alternatively, route information from the device 20 to the recommended device may be output to the display control unit 166. [First embodiment] [Group communication processing according to the first embodiment] A group communication process according to the first embodiment will be described with reference to FIG. 6. FIG. 6 is a sequence diagram showing an example of the flow of group communication processing according to the embodiment. For the sake of simplicity, the following is a description of a wireless communication device on the transmitting side, a wireless communication device on the receiving side having a decoding function, The following describes the case where the system includes one wireless communication device on the receiving side that does not have a decoding function. However, this does not limit the number of wireless communication devices included in group communication.

[0051] In the example shown in FIG. 6, the wireless communication device 10a is a wireless communication device on the transmitting side. The wireless communication device 20 is a wireless communication device having a decoding function. It is a wireless communication device that does not have a

[0052] First, the wireless communication device 10a starts group communication (step S11). The device 10a transmits a response request signal including an instruction to switch on the decryption function. The wireless communication device 10b and the wireless communication device 20 are transmitted (steps S12 and S13). That is, a single transmission operation from the wireless communication device 10a transmits the same signal to the wireless communication device 10b and the wireless A response request signal is transmitted to the communication device 20. The wireless communication device 10a After transmitting a response request signal to the wireless communication device 20, each wireless communication device The process waits for a first time period until the function is switched to the ON state (step S14). There is no restriction, and it may be several seconds to several tens of seconds (for example, 10 seconds). Alternatively, a timer may be used that starts after the notification is received and expires when the first time has elapsed.

[0053] When the wireless communication device 10b receives the response request signal, the wireless communication device 10b decodes the response request signal before the first time period has elapsed. The wireless communication device 10b switches the function to an ON state (step S15). The first response signal indicating that the wireless communication device 10a has the encoding function and the current location information are transmitted to the wireless communication device 10a. Reply (step S16).

[0054] When the wireless communication device 20 receives the response request signal, the wireless communication device 20 The second response signal indicating that the wireless communication device 1 does not have a decoding function and the current location information are transmitted to the wireless communication device 1. 0a (step S17).

[0055] The wireless communication device 10a performs the process of combining the information received in step S16 and the information received in step S17. The information is stored as group information in the storage unit 13 (step S18). Step 0a identifies a recommended device and a notification-required device based on the stored group information (step In the example shown in FIG. 6, the wireless communication device 10b is identified as the recommended device, and the wireless communication The receiving device 20 is identified as a device requiring notification.

[0056] The wireless communication device 10a transmits encryption information to the wireless communication device 10b that is specified as a recommended device. The wireless communication device 10a transmits the data (step S20). The wireless communication device 10b is a recommended device based on the location information of the wireless communication device 20 and the location information of the wireless communication device 20. The wireless communication device a generates the guide information (step S21). The wireless communication device 20 identified as the known device transmits the notification (step S22).

[0057] The wireless communication device 10b decrypts the encrypted data received from the wireless communication device 10a ( Step S23). The wireless communication device 10b displays the data decoded in step S23 on the display unit. 15 (step S24).

[0058] The wireless communication device 20 controls the display control unit based on the guidance information received from the wireless communication device 10a. The guidance information for image display generated by 166 is displayed on the display unit 15 (step S25).

[0059] In the process of FIG. 6, the wireless communication device 10a does not transmit a wireless communication However, the present invention is not limited to this. For example, the wireless communication device 10a may detect that the wireless communication device 20 is located relative to the wireless communication device 10b. Alternatively, guidance information may be transmitted to guide the user to a desired location.

[0060] The process of the transmitting wireless communication device according to the first embodiment will be described with reference to FIG. 7 is a flow chart showing a process flow when a group communication is performed by a wireless communication device on the transmitting side according to the first embodiment. 11 is a flowchart illustrating an example.

[0061] First, the wireless communication device 10 sends a response request to each of the other wireless communication devices that perform group communication. Specifically, the communication control unit 163 controls the communication unit 12 to transmit a signal (step S101). Then, in step S1, the control unit 10 controls the other wireless communication devices 10 to transmit a response request signal to the other wireless communication devices 10. Go to 02.

[0062] The wireless communication device 10 continues to receive the decryption signal until each of the other wireless communication devices switches the decryption function to the on state. The process waits for a first period of time (step S102), and then the process proceeds to step S103.

[0063] The wireless communication device 10 receives a response signal and location information in response to the response request signal from each of the other wireless communication devices. Specifically, the communication control unit 163 receives the information via the communication unit 12 (step S103). Then, the process proceeds to step S104.

[0064] The wireless communication device 10 stores the information received from each of the other wireless communication devices as group information. Specifically, the storage control unit 164 receives the information from each of the other wireless communication devices (step S104). The received information is stored as group information in the storage unit 13. Then, in step S105, move on.

[0065] The wireless communication device 10 detects whether a notification-requiring device is available among the other wireless communication devices that perform group communication. Specifically, the specification unit 167 determines whether or not the identification unit 167 has detected the Based on the stored group information, each of the other wireless communication devices is checked to see if it includes a device requiring notification. If it is determined that a notification-required device is included (Yes in step S105), If it is determined that the notification-required device is not included (step S106), the process proceeds to step S107. If the result of step S104 is No, the process proceeds to step S109.

[0066] If the determination in step S104 is Yes, the wireless communication device 10 recommends a notification-required device. The device is identified (step S106). Specifically, the identification unit 167 identifies the location of the notification-required device. Recommendations based on the information and the location information of each other wireless notification device that was not identified as a notification-required device Here, when there are multiple notification-required devices, the identification unit 167 A recommended device is identified for each device, and the process proceeds to step S107.

[0067] The wireless communication device 10 determines whether or not a notification is required based on the location information of the recommended device and the location information of the notification required device. The wireless communication device 10 generates guidance information for the notification-requiring device (step S107). The guidance information is transmitted to the wireless communication device, and the encrypted data is transmitted to the other wireless communication devices (step Specifically, the guidance information generating unit 170 receives the position information of the notification-required device and the recommended device The communication control unit 163 generates guidance information to the recommended device based on the position information of the communication unit. By controlling the number of devices, guidance information to recommended devices is sent to devices requiring notification, and other unreliable devices are The encrypted data is then transmitted to the wired communication device, and the process of FIG.

[0068] If the result of the determination in step S105 is No, the wireless communication device 10 Specifically, the communication control unit 163 transmits the encrypted data to the The receiving unit 12 is controlled to transmit the encrypted data to each wireless communication device. The processing in FIG. 7 ends.

[0069] 8, the processing of the receiving wireless communication device not having a decoding function according to the first embodiment will be described. FIG. 8 shows wireless communication on the receiving side not having a decoding function according to the first embodiment. 11 is a flowchart showing an example of a process flow when performing group communication of devices.

[0070] First, the wireless communication device 20 receives a response request signal from the wireless communication device 10 (step S201). Specifically, the communication control unit 163 receives a response request signal via the communication unit 12. Then, the process proceeds to step S202.

[0071] The wireless communication device 20 sends a second response signal indicating that it does not have a decoding function and a current location The communication control unit 1 transmits the information to the wireless communication device 10 (step S202). 63 communicates the second response signal and the wireless communication acquired by the position information acquisition unit 162 via the communication unit 12. The current location information of the device 20 is transmitted. Then, the process proceeds to step S203.

[0072] The wireless communication device 20 may transmit a signal to a user of the wireless communication device 20 from a location where the wireless communication device 20 is located. The user then receives guidance information from the device to guide the user to the location where the recommended device is located (step S203). In the above, the communication control unit 163 transmits guidance information from the notification-required device to the recommended device via the communication unit 12. Then, the process proceeds to step S204.

[0073] The wireless communication device 20 generates data for displaying on the screen based on the guidance information to the recommended device. Specifically, the display control unit 166 selects a recommended device based on the guidance information (step S204). Based on the information, an image showing the direction and distance from the current position to the recommended device, and a location acquired from the storage unit 13 are displayed. Navigation information showing the route from the current location to the location of the recommended device is superimposed on the diagram information. An image may be generated, and the process proceeds to step S205.

[0074] The wireless communication device 20 displays the image generated in step S204 on the screen (step S 205). Specifically, the display control unit 166 causes the display unit 15 to display the guidance information. Then, the process in FIG. 8 ends.

[0075] As described above, in the first embodiment, when transmitting encrypted data in group communication, Guidance information for wireless communication devices that do not have a decoding function to wireless communication devices that have a decoding function Then, the wireless communication device without the decoding function can transmit the It is possible to display guidance information to a wireless communication device having an encryption function. A user of a wireless communication device that does not have a decoding function may not be able to detect the presence of a wireless communication device that has a decoding function. By moving to the location where the encrypted data is stored, you can understand the contents of the encrypted data. [Second embodiment] Next, a second embodiment of the present invention will be described. The configurations of the system and the wireless communication device are the same as those in the first embodiment, so the description will be omitted. .

[0076] In the second embodiment, the wireless communication device 10a to the wireless communication device 10b participating in the group communication The device 10e and the wireless communication device 20 periodically exchange the identification information, the user name, and the location information with each other. That is, each wireless communication device participating in group communication may transmit a group Location information of each wireless communication device participating in the communication may be shared.

[0077] Specifically, the storage control unit 164 of each wireless communication device is configured to store the information on the communication control unit 163 of the other wireless communication device. When the identification information, user name, and location information of the device are received, the identification information of each of the other wireless communication devices is The user name and the location information are associated with each other and stored in the storage unit 13 to generate group information. The storage control unit 164 of each wireless communication device is configured to store the information stored in the storage control unit 164 when the communication control unit 163 identifies other wireless communication devices. Every time the user information and the location information are received, the group information is updated. The user name may be omitted.

[0078] In the second embodiment, notification-required devices and recommended devices are selected based on group information that is periodically updated. The system identifies the location of the recommended device and transmits the location information of the recommended device to the notification-requiring device. [Group communication processing according to the second embodiment] A group communication process according to the second embodiment will be described with reference to FIG. 9. FIG. 11 is a sequence diagram showing an example of the flow of group communication processing according to the embodiment.

[0079] The processes in steps S31 to S34 are respectively the same as those in steps S11 to S34 shown in FIG. Since this is the same as the process in step S14, the explanation will be omitted.

[0080] The wireless communication device 10a sends a response request to the wireless communication device 10b and the wireless communication device 20. After sending the signal, each device waits a first time period before switching its decryption function on. (Step S35). There is no particular limit to the first time period, and it may be several seconds to several tens of seconds (for example, 10 seconds). After the first time period has expired, the wireless communication device 10a may The encrypted data is simultaneously transmitted to the device 20 (steps S36a and S36b). Then, the second waiting period starts (step S37).

[0081] When the wireless communication device 20 receives the encrypted data from the wireless communication device 10a, the wireless communication device 20 enters a second standby state. If the wireless communication device 10a receives a response indicating that the wireless communication device 10a does not have an encryption function before the expiration of the period, The response signal is then transmitted (step S38).

[0082] The wireless communication device 10a detects the wireless communication device 20 that has transmitted a response signal to the encrypted data. The device is identified as a device requiring notification (step S39).

[0083] The wireless communication device 10a makes a prediction based on group information previously stored in the storage unit 13. A recommended device (eg, wireless communication device 10b) is identified (step S40).

[0084] The processing in steps S41 to S45 is the same as that in steps S20 to S23 shown in FIG. 24, the explanation will be omitted.

[0085] The process of the transmitting wireless communication device according to the second embodiment will be described with reference to FIG. FIG. 10 is a flow chart showing a process for performing group communication of a wireless communication device on the transmitting side according to the second embodiment. 1 is a flowchart showing an example of this.

[0086] First, the wireless communication device 10 sends a response request to each of the other wireless communication devices that perform group communication. Specifically, the communication control unit 163 controls the communication unit 12 to transmit a signal (step S301). Then, in step S3, the control unit 10 controls the other wireless communication devices 10 to transmit a response request signal to the other wireless communication devices 10. Go to 02.

[0087] The wireless communication device 10 transmits a response request signal to each of the other wireless communication devices, and then It is determined whether or not the time has elapsed (step S302). Then, it is determined whether the first time has elapsed. If it is determined that the first time has not elapsed (step If it is determined that the first time has elapsed, the process of step S302 is executed. If so (Yes in step S302), the process proceeds to step S303.

[0088] If the determination in step S302 is Yes, the wireless communication device 10 Specifically, the communication control unit 16 transmits the encrypted data to the 3 controls the communication unit 12 to transmit the encrypted data to each of the other wireless communication devices. Then, proceed to step S304.

[0089] The wireless communication device 10 receives a response signal to the encrypted data from each of the other wireless communication devices. Specifically, the communication control unit 163 determines whether the communication unit 1 2, it is determined whether or not a response signal has been received from each of the other wireless communication devices. If it is determined that a response signal has been received from the receiving device (Yes in step S304), On the other hand, if it is determined that the response signal has not been received (step S305), 4), proceed to step S306.

[0090] If the result of the determination in step S304 is Yes, the wireless communication device 10 transmits a response signal. The wireless communication device that has been detected is identified as a notification-requiring device (step S305). 167 identifies the wireless communication device that transmitted the response signal as a device requiring notification. Continue to step S306.

[0091] The wireless communication device 10 transmits the encrypted data to each of the other wireless communication devices, and then It is determined whether or not the time has elapsed (step S306). Then, it is determined whether the second time has elapsed. If it is determined that the second time has not elapsed (step If the result of step S306 is No, the process proceeds to step S304. If so (Yes in step S306), proceed to step S307.

[0092] If the determination in step S306 is Yes, the wireless communication device 10 does not participate in group communication. It is determined whether or not there is a notification-requiring device among the wireless communication devices that are participating (step S30 7). Specifically, the identification unit 167 determines whether or not there is a notification-required device. If it is determined that there is a problem (Yes in step S307), the process proceeds to step S308. If it is determined that there is no device that requires notification (No in step S307), the process in FIG. 10 is terminated. do.

[0093] If the determination in step S307 is Yes, the wireless communication device 10 decrypts the encrypted data. The identification unit 167 identifies the wireless communication device that has successfully encrypted the signal (step S308). Based on group information stored in advance in the storage unit 13, The communication device is identified as a wireless communication device that was able to decrypt the encrypted data. Proceed to step S309.

[0094] The wireless communication device 10 selects a recommended device from among the wireless communication devices that have been able to encrypt the data for each notification-requiring device. Specifically, the identification unit 167 identifies the A recommended device is identified based on location information included in the group information. Proceed to step S310.

[0095] The wireless communication device 10 determines whether or not a notification is required based on the location information of the recommended device and the location information of the notification-required device. In step S310, guidance information from the known device to the recommended device is generated. The information generating unit 170 notifies the recommended device based on the location information of the notification-required device and the location information of the recommended device. Generate guidance information for the

[0096] The wireless communication device 10 transmits guidance information to the recommended device to the notification-required device (step Specifically, the communication control unit 163 controls the communication unit 12 to Then, the process in FIG. 10 ends.

[0097] FIG. 11 is a flowchart showing the process of a receiving wireless communication device not having a decoding function according to the second embodiment. FIG. 11 shows a second embodiment of a wireless communication system for receiving a signal without a decoding function. 10 is a flowchart showing an example of a process flow when group communication of communication devices is performed.

[0098] First, the wireless communication device 20 receives a response request signal from the wireless communication device 10 (step S401). Specifically, the communication control unit 163 receives a response request signal via the communication unit 12. Then, the process proceeds to step S402.

[0099] The wireless communication device 20 receives the encrypted data from the wireless communication device 10 (step S40 2) Specifically, the communication control unit 163 receives the encrypted data via the communication unit 12. Then, proceed to step S403.

[0100] The wireless communication device 20 transmits a response signal indicating that the wireless communication device 20 does not have a decoding function to the wireless communication device 10. Specifically, the communication control unit 163 transmits the Then, the process proceeds to step S404.

[0101] The processes in steps S404 to S406 are respectively the same as those in step S2 shown in FIG. Since the processing from step S3 to step S205 is the same as that in step S205, the description will be omitted.

[0102] As described above, in the second embodiment, when transmitting encrypted data in group communication, Based on the stored group information, the wireless communication device that does not have a decoding function performs decoding. It is possible to transmit guidance information to a wireless communication device having a decoding function. The wireless communication device without the encryption function provides the user with guidance information to switch to the wireless communication device with the encryption function. This allows users of wireless communication devices that do not have a decoding function to see the By moving to a location where a wireless communication device having a decryption function is located, It is possible to grasp the appearance. [Modification of the second embodiment] Next, a modified example of the second embodiment of the present invention will be described. The configurations of the wireless communication system and the wireless communication device according to the present embodiment are the same as those of the first embodiment. The explanation will be omitted.

[0103] In the second embodiment, a wireless communication device that does not have a decryption function receives encrypted data. Then, the wireless communication device transmits a response signal indicating that the wireless communication device does not have the encryption function. In contrast, in the modified example of the second embodiment, a wireless communication device that does not have a decoding function is a wireless device on the transmitting side. When a response request signal is received from the wired communication device, the wired communication device returns a response signal. [Group communication processing according to a modified example of the second embodiment] A group communication process according to a modified example of the second embodiment will be described with reference to FIG. FIG. 12 is a sequence diagram showing an example of the flow of group communication processing according to a modification of the second embodiment. It is.

[0104] The processes in steps S51 to S54 are respectively the same as those in steps S31 to S34 shown in FIG. Since this is the same as the process in step S34, the explanation will be omitted.

[0105] When the wireless communication device 20 receives the response request signal from the wireless communication device 10a, The device 10b receives a response signal indicating that the device 10b does not have an encryption function (step S5 5).

[0106] The wireless communication device 10a detects the wireless communication device 20 that has transmitted a response signal to the encrypted data. The wireless communication device 10a is identified as a device requiring notification (step S56). The process waits for a first period of time until each wireless communication device transmits a response signal (step S57). .

[0107] The wireless communication device 10a transmits the encrypted data to the wireless communication device 10b (step (P S58).

[0108] The processes in steps S59 to S64 are respectively the same as those in steps S40 to S64 shown in FIG. Since this is the same as the process in step S45, the explanation will be omitted.

[0109] The process of the wireless communication device on the transmitting side according to the modified example of the second embodiment will be described with reference to FIG. FIG. 13 illustrates group communication of a wireless communication device on the transmitting side according to a modification of the second embodiment. 11 is a flowchart showing an example of a process flow when

[0110] The process in step S501 is the same as the process in step S301 shown in FIG. The explanation will be omitted.

[0111] The wireless communication device 10 receives a response signal in response to the response request signal from each of the other wireless communication devices. Specifically, the communication control unit 163 determines whether the communication unit 1 2, it is determined whether or not a response signal has been received from each of the other wireless communication devices. If it is determined that a response signal has been received from the receiving device (Yes in step S502), On the other hand, if it is determined that the response signal has not been received (step S503), 2), proceed to step S504.

[0112] The wireless communication device 10 transmits an application request signal to each of the other wireless communication devices, and then It is determined whether or not the time has elapsed (step S504). Then, it is determined whether the first time has elapsed. If it is determined that the first time has not elapsed (step If it is determined that the first time has elapsed (No in step S504), the process proceeds to step S502. If a result of step S504 is Yes, proceed to step S505.

[0113] If the determination in step S504 is Yes, the wireless communication device 10 Specifically, the communication control unit 16 transmits the encrypted data to the 3 controls the communication unit 12 to transmit the encrypted data to each of the other wireless communication devices. Then, proceed to step S506.

[0114] The processes in steps S506 to S510 are the same as those in steps S307 to S309 shown in FIG. This is the same process as step S311, so the explanation will be omitted.

[0115] In a modification of the second embodiment, a notification-required device is identified based on a response signal to a response request signal. By specifying Cut.

[0116] FIG. 14 is used to explain wireless communication on the receiving side without a decoding function according to the modified example of the second embodiment. The processing of the device will be described. FIG. 14 shows a modified example of the second embodiment having a composite function. 1 is a flowchart showing an example of a process flow when performing group communication of a wireless communication device on the receiving side that is not a It is.

[0117] The processes in step S601 and steps S604 to S606 are respectively as follows: The same process as step S401 and steps S404 to S406 shown in FIG. Since it is one, the explanation will be omitted.

[0118] After step S601, the wireless communication device 20 returns a response indicating that it does not have a decoding function. The signal is transmitted to the wireless communication device 10 (step S602). 3 transmits a response signal via the communication unit 12. Then, the process proceeds to step S603.

[0119] The wireless communication device 20 receives the encrypted data from the wireless communication device 10 (step S60 3) Specifically, the communication control unit 163 receives the encrypted data via the communication unit 12. Then, proceed to step S604.

[0120] As described above, in the second embodiment, when transmitting encrypted data in group communication, Based on the stored group information, the wireless communication device that does not have a decoding function performs decoding. It is possible to transmit guidance information to a wireless communication device having a decoding function. The wireless communication device without the encryption function provides the user with guidance information to switch to the wireless communication device with the encryption function. This allows users of wireless communication devices that do not have a decoding function to see the By moving to a location where a wireless communication device having a decryption function is located, It is possible to grasp the appearance. [Other embodiments] Next, other embodiments of the present invention will be described.

[0121] In each of the above-described embodiments, the position information of the wireless communication device performing group communication is However, the present invention is not limited to this. The device detects the positions of other wireless communication devices from a base station that manages the wireless communication devices that perform group communication. Information may be acquired.

[0122] The base station stores, for example, various group information of groups that perform group communication. For example, the base station periodically acquires location information from each wireless communication device included in the group information. Accordingly, the location information of each wireless communication device is updated.

[0123] The wireless communication device performing group communication determines the communication destination based on the location information stored in the base station. Specifically, the wireless communication device does not have a decoding function. When a response signal indicating this is received, the base station performs group communication including the notification device. In this case, the wireless communication device acquires the location information from the base station. Based on the obtained location information, the wireless communication device identifies a recommended device for the notification-required device. The location information of the recommended device is transmitted to the notification-requiring device.

[0124] In this way, the wireless communication device acquires group information from the base station device, and thereby Since there is no need to obtain location information from a wireless communication device, processing is reduced.

[0125] Although the embodiments of the present invention have been described above, the present invention is not limited to the contents of these embodiments. In addition, the above-mentioned components are not those that a person skilled in the art can easily imagine, and are not substantially different from the above-mentioned components. In addition, the above-mentioned components are appropriately Furthermore, the above-described embodiments may be combined without departing from the spirit of the present invention. Various omissions, substitutions or modifications of components may be made. [Explanation of symbols]

[0126] 1. Wireless communication systems 10 Wireless communication devices 11 GPS receiver 12 Communications Department 13 Storage section 14 Control section 15 Display section 16 Control section 161 Device information acquisition unit 162 Location information acquisition unit 163 Communication Control Unit 164 Memory control unit 165 Operation control section 166 Display control section 167 Specific section 168 Encryption section 169 Decoding section 170 Guidance information generation section

Claims

1. A wireless communication device capable of communicating within a group of a plurality of wireless communication devices, A communication unit for transmitting and receiving signals to and from other wireless communication devices; Acquires identification information, response signals and location information of other wireless communication devices belonging to the group. A communication control unit; a storage unit that stores the identification information and the position information; The location information of a wireless communication device having a decoding function and a wireless communication device not having a decoding function an identification unit that identifies a recommended device from the location information of the notification device; a guidance information generating unit that generates guidance information from the notification requiring device to the recommended device; Equipped with The communication control unit controls the communication unit to transmit the encrypted data, and then receiving a response signal from the The specifying unit is configured to specify the identification information and the position information stored in the storage unit, Identifying the recommended device based on the response signal acquired by the communication control unit during a predetermined time period; The guidance information generating unit generates guidance information based on the location information of the notification-required device and the location information of the recommended device. generating said guidance information; The communication control unit controls the communication unit to transmit the guidance information to the notification required device. do Wireless communication device.

2. The identification unit is configured to identify the notification-required device among other wireless communication devices other than the identified notification-required device. identifying a wireless communication device located closest to the device as the recommended device; The wireless communication device of claim 1 .

3. Wireless communication by a wireless communication device capable of communicating within a group of a plurality of wireless communication devices 1. A method comprising: transmitting and receiving signals to and from another wireless communication device; Acquires identification information, response signals and location information of other wireless communication devices belonging to the group. and storing said identification information and said location information; The location information of a wireless communication device having a decoding function and a wireless communication device not having a decoding function Identifying a recommended device from the location information of the notification device; generating guidance information from the notification requiring device to the recommended device; transmitting the guidance information to the notification required device; Including, The step of identifying the recommended device includes the steps of: A response signal indicating that the encrypted data cannot be decrypted is received, and the stored identification information and identifying the recommended device based on the location information and the response signal acquired during a predetermined time period. Determine, The step of generating the guidance information includes: generating the guidance information based on the information and transmitting the guidance information to the notification-required device; R A wireless communication method.

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