JP7418691B2 - Wireless communication device, wireless communication system, and wireless communication method - Google Patents

Description

The present disclosure relates to a wireless communication device, a wireless communication system, and a wireless communication method.

In wireless communication, group communication may be performed between a plurality of terminal devices. For example, Patent Document 1 discloses a technique that allows a base unit to take a roll call of slave units using group communication.

Japanese Patent Application Publication No. 9-62948

In Patent Document 1, the existence of terminal devices belonging to a group can be confirmed. However, Patent Document 1 does not take into account appropriate transmission of predetermined transmission information including text information and audio information to all members belonging to a group. In this case, the transmitter of the transmission information will repeatedly transmit the same information until it is confirmed that all members of the group have received the transmission information. Therefore, the receiving side may find it troublesome because it repeatedly receives the same transmission information.

The present disclosure aims to provide a wireless communication device, a wireless communication system, and a wireless communication method that can appropriately transmit information.

A wireless communication device according to an aspect of the present disclosure includes an acquisition unit that acquires transmission information including a response request signal transmitted from a transmission side wireless communication device via a communication unit, and an output unit that outputs the transmission information. an output control unit; and a communication control unit that transmits a response signal to the response request signal to the management device via the communication unit when the output control unit causes the output unit to output the transmission information. , an information identifier according to the content of the transmission information is added to the transmission information, and the output control section is configured to transmit the transmission information after the acquisition section acquires a reception completion notification for the response signal from the management device. When second transmission information to which the same information identifier as the first transmission information corresponding to the reception completion notification is added is received from the management device, the second transmission information is not output to the output unit.

A wireless communication system according to an aspect of the present disclosure includes a wireless communication device according to an aspect of the present disclosure, and a management device that transmits the transmission information to the wireless communication device, and the management device transmits the transmission information. The first transmission information transmitted by the side wireless communication device is repeatedly transmitted as the second transmission information to the wireless communication device for a predetermined period of time.

A wireless communication method according to an aspect of the present disclosure includes the steps of: acquiring transmission information including a response request signal transmitted from a transmitting wireless communication device via a communication unit; and outputting the transmission information to an output unit. and a step of transmitting a response signal to the response request signal to the management device via the communication unit when the output unit outputs the transmission information, and the transmission information includes the transmission information. An information identifier corresponding to the content of the response signal is added, and in the step of outputting the transmission information to the output unit, after acquiring a reception completion notification for the response signal from the management device, a first information identifier corresponding to the reception completion notification is added. When receiving second transmission information to which the same information identifier as the transmission information is received from the management device, the second transmission information is not output to the output unit.

According to the present disclosure, information can be appropriately transmitted.

FIG. 1 is a diagram illustrating an example of the configuration of a wireless communication system according to an embodiment. FIG. 2 is a block diagram illustrating an example of the configuration of a wireless communication device according to an embodiment. FIG. 3 is a table showing an example of history information. FIG. 4 is a block diagram showing an example of the configuration of the management device according to the embodiment. FIG. 5 is a table showing an example of device information. FIG. 6 is a table showing an example of reply information. FIG. 7 is a sequence diagram illustrating an example of the processing flow of the wireless communication system according to the embodiment. FIG. 8 is a flowchart illustrating an example of the process flow of the transmitting side wireless communication device according to the embodiment. FIG. 9 is a flowchart illustrating an example of the process flow of the receiving side wireless communication device according to the embodiment. FIG. 10 is a flowchart illustrating an example of the processing flow of the management device according to the embodiment.

Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the present disclosure is not limited to this embodiment, and if there are multiple embodiments, it also includes a configuration in which each embodiment is combined. Further, in the following embodiments, the same parts are given the same reference numerals and redundant explanations will be omitted.

[Wireless communication system]
A wireless communication system according to an embodiment will be described using FIG. 1. FIG. 1 is a diagram illustrating an example of the configuration of a wireless communication system according to an embodiment.

As shown in FIG. 1, the wireless communication system 1 includes a wireless communication device 10a, a wireless communication device 10b, a wireless communication device 10c, a wireless communication device 10d, a wireless communication device 10e, a management device 20, and a base station. device 30. The wireless communication system 1 is, for example, a commercial wireless communication system. Although the wireless communication system 1 includes five wireless communication devices, the present disclosure is not limited thereto.

The wireless communication devices 10a to 10e belong to the same group. The wireless communication devices 10a to 10e perform group communication among themselves. It is assumed that the wireless communication device 10a is a transmitting side wireless communication device. It is assumed that the wireless communication devices 10b to 10e are receiving side wireless communication devices. In the example shown in FIG. 1, five wireless communication devices, ie, wireless communication device 10a to wireless communication device 10e, are shown, but the present disclosure is not limited thereto. There is no particular limit to the number of wireless communication devices included in the wireless communication system 1. The wireless communication devices 10a to 10e may be collectively referred to as the wireless communication device 10.

The management device 20 manages the wireless communication devices 10a to 10e as wireless communication devices belonging to the same group. The management device 20 manages various information regarding group communication between the wireless communication devices 10a to 10e. The management device 20 is connected to the base station device 30 via a wired or wireless network.

The base station device 30 forms a communication area R as a communicable area. The wireless communication devices 10a to 10e perform group communication with wireless communication devices existing in the communication area R and belonging to the same group via the base station device 30. The wireless communication devices 10a to 10e may directly perform group communication without going through the base station device 30.

The wireless communication system 1 is used, for example, in recreational areas such as mountains and rivers. In this case, the wireless communication device 10a becomes a transmitting side wireless communication device used by, for example, a manager of a recreational area. In this case, the wireless communication device 10a may be a fixed station or a mobile station. The wireless communication devices 10b to 10e serve as receiving side wireless communication devices that are handed over by an administrator or the like to people visiting the resort. In this case, the wireless communication devices 10b to 10e become mobile stations.

The wireless communication device 10a transmits communication information including voice and text to the wireless communication devices 10b to 10e. The wireless communication device 10a repeatedly transmits the communication information to the wireless communication devices 10b to 10e until a predetermined condition is satisfied. The transmission information transmitted by the wireless communication device 10a includes a response request signal (Ack: Acknowledgment). The wireless communication device 10a receives a transmission completion notification (group communication completion notification) when a predetermined condition is satisfied.

Upon receiving the transmitted information, the wireless communication devices 10b to 10e output the transmitted information to the user. After transmitting the transmission information to the user, the wireless communication devices 10b to 10e transmit a response signal (Ack) to the response request signal to the wireless communication device 10a. The wireless communication devices 10b to 10e may automatically transmit the response signal, or may transmit the response signal according to the user's operation. When the wireless communication devices 10b to 10e automatically transmit response signals, collision of response signals for each wireless communication device is possible, but for example, a function that randomly shifts the timing of transmission for each wireless communication device may be used to reduce the probability of response signals colliding. The wireless communication devices 10b to 10e receive the completion notification for the response signal from the wireless communication device 10a. After receiving the reception completion notification, the wireless communication devices 10b to 10e stop outputting the same transmission information.

The configuration of the wireless communication device according to the embodiment will be described using FIG. 2. FIG. 2 is a block diagram showing an example of the configuration of a wireless communication device.

As shown in FIG. 2, the wireless communication device 10 includes a communication section 11, an operation section 12, an output section 13, a storage section 14, and a control section 15.

The communication unit 11 is realized by, for example, a NIC (Network Interface Card), a communication circuit, or the like. The communication unit 11 is connected to other wireless communication devices, the base station device 30, and the like via a wireless communication network, for example. The communication section 11 includes a transmitting section 111 and a receiving section 112.

The transmitting unit 111 transmits various types of information to other wireless communication devices and the like via the wireless communication network under the control of the communication control unit 153. The receiving unit 112 receives various information from other wireless communication devices and the like via the wireless communication network under the control of the communication control unit 153. That is, the communication unit 11 transmits and receives various information to and from other wireless communication devices and the like via the wireless communication network under the control of the communication control unit 153.

The operation unit 12 accepts various operations from the user. The operation unit 12 receives, for example, an operation for transmitting transmission information to another wireless communication device. The operation unit 12 receives, for example, an operation for transmitting a response signal to another wireless communication device. The operation unit 12 includes, for example, a physical switch or a touch panel provided on the wireless communication device 10. The physical switch includes, for example, a power switch and a PTT (Push to Talk) button of the wireless communication device 10. In this embodiment, group communication is started, for example, when the user presses the PTT button. The operation unit 12 may accept utterances from the user as input. In this case, the operation unit 12 may be configured with a voice input device such as a microphone provided in the wireless communication device 10.

The output unit 13 outputs various information. The output unit 13 displays various information. The output unit 13 is configured of a display including, for example, a liquid crystal display (LCD) or an organic electro-luminescence (EL) display. The output unit 13 displays, for example, transmission information received from another wireless communication device. The output unit 13 may have a function of outputting audio. The output unit 13 may include, for example, a speaker that outputs audio. In this case, the output unit 13 outputs the transmission information received from another wireless communication device in the form of audio.

The storage unit 14 is realized by, for example, a semiconductor memory element such as a RAM (Random Access Memory) or a flash memory, or a storage device such as a hard disk or an optical disk. The storage unit 14 stores, for example, history information regarding the history of transmission information received by the wireless communication device 10.

The reception history information stored in the storage unit 14 will be explained using FIG. 3. FIG. 3 is a table showing an example of reception history information.

As shown in FIG. 3, the reception history information includes, for example, items such as "date and time", "transmission information", "information identifier", and "group identifier".

“Date and time” is the date and time when the transmission information was received. "Transmission information" is the content of transmission information. "Information identifier" is an identifier for identifying transmitted information. "Group identifier" is an identifier for identifying a group that performs group communication.

In the example shown in FIG. 3, for example, it is shown that "AAA" was received as the transmission information at "2019/11/6 10:35:02". The information identifier of "AAA" is "001", indicating that this is transmission information transmitted in group communication by the group "G1".

The "transmission information" is conceptually shown as "AAA", "BBB", and "CCC", but actually shows the concrete contents of the information. For example, the "transmission information" includes content such as "The river has swelled due to heavy rain. It is dangerous."

The reception history information includes items such as "date and time," "transmission information," "information identifier," and "group identifier," as well as a "sender identifier" to identify the sender who sent the transmission information. may be included. The "sender identifier" may be the sender's name or a pre-assigned number of a wireless communication device used by the sender. The information may also include information as to whether or not the reception completion notification sent by the management device has been received. The wireless communication device on the receiving side does not output the same transmission information by referring to the reception history information.

Referring again to FIG. The control unit 15 executes a program stored inside the wireless communication device 10 by, for example, a CPU (Central Processing Unit) or an MPU (Micro Processing Unit) using a RAM (Random Access Memory) or the like as a work area. This is realized by The control unit 15 is a controller, and may be realized by, for example, an integrated circuit such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array). The control unit 15 may be realized by a combination of software and hardware. The control unit 15 includes an acquisition unit 151, an output control unit 152, a communication control unit 153, and a storage control unit 154.

The acquisition unit 151 acquires various types of information via the communication unit 11. The acquisition unit 151 acquires, for example, the transmission information received by the reception unit 112. The acquisition unit 151 acquires, for example, the reception completion notification and group communication completion notification received by the reception unit 112.

The output control unit 152 causes the output unit 13 to output various information acquired by the acquisition unit 151. The output control unit 152 causes the output unit 13 to output the transmission information acquired by the acquisition unit 151. When the transmitted information is image information, text information, etc., the output control unit 152 causes the output unit 13 to display the image, text, and the like. When the transmitted information is audio information, the output control unit 152 causes the output unit 13 to output audio or the like.

The output control unit 152 may determine whether to output the transmission information to the output unit 13 based on the information identifier of the transmission information acquired by the acquisition unit 151. The output control unit 152 may determine, for example, based on the history information stored in the storage unit 14, whether or not to cause the output unit 13 to output the transmission information. For example, if the output control unit 152 receives transmission information to which the same information identifier as the transmission information acquired by the acquisition unit 151 is added within a predetermined period (for example, within 3 minutes), the output control unit 152 outputs the transmission information from the acquisition unit 151. does not allow the output unit 13 to output the transmission information acquired by the user. For example, if the output control unit 152 has not received the transmission information to which the same information identifier as the transmission information acquired by the acquisition unit 151 is added within a predetermined period, the output control unit 152 outputs the transmission information acquired by the acquisition unit 151. unit 13 to output.

The communication control unit 153 controls the communication unit 11 to transmit and receive various information to and from other wireless communication devices. For example, when the power of the wireless communication device 10 is switched from an off state to an on state, the communication control unit 153 manages the group identifier of the group to which it belongs and device information indicating that the power is turned on. It is transmitted to the device 20. The communication control unit 153 may transmit a sender identifier for identifying the wireless communication device 10.

When the wireless communication device 10 is a transmitting side wireless communication device, the communication control unit 153 adds an information identifier to the transmission information inputted by the operation unit 12 while transmitting information to other wireless communication devices and the management device 20, for example. Send to etc. When the communication control unit 153 serves as a receiving side wireless communication device, for example, after the output control unit 152 outputs the transmission information to the output unit 13, the communication control unit 153 sends a response signal to the response request signal of the transmission information to the management device. 20.

The storage control unit 154 stores various information acquired by the acquisition unit 151 in the storage unit 14 . The storage control unit 154 stores, for example, the transmission information acquired by the acquisition unit 151 in the storage unit 14. The storage control unit 154 stores, for example, the date and time of receiving the transmission information, the content of the transmission information, the information identifier, and the group identifier in the storage unit 14 in association with each other.

The configuration of the management device according to the embodiment will be described using FIG. 4. FIG. 4 is a block diagram showing an example of the configuration of the management device according to the embodiment.

As shown in FIG. 4, the management device 20 includes a communication section 21, a storage section 22, and a control section 23.

The communication unit 21 is realized by, for example, a NIC, a communication circuit, or the like. The communication unit 21 is connected to the base station device 30 via the network NW. The communication unit 21 transmits and receives various information via the base station device 30. The communication section 21 includes a transmitting section 211 and a receiving section 212.

The transmitting unit 211 transmits various information to each wireless communication device via the base station device 30 under the control of the communication control unit 233. The transmitting unit 211 transmits the transmission information transmitted by the transmitting side wireless communication device to each receiving side wireless communication device via the base station device 30. The transmitting unit 211 repeatedly transmits the transmission information transmitted by the transmitting side wireless communication device to each receiving side wireless communication device via the base station device 30. The number of repetitions or the repetition time may be set arbitrarily by the user. When the receiving unit 212 receives a response signal from the receiving wireless communication device, the transmitting unit 211 sends a reception completion notification to the receiving wireless communication device that transmitted the response signal via the base station device 30. Send. When a predetermined condition is satisfied, the transmitting unit 211 transmits a group communication completion notification to the transmitting wireless communication device that transmitted the transmission information via the base station device 30.

The receiving unit 212 receives various information from each wireless communication device via the base station device 30 under the control of the communication control unit 233. The receiving unit 212 receives device information including information such as the power state and the group identifier of the group to which the wireless communication device belongs from each wireless communication device via the base station device 30. The receiving unit 212 receives, via the base station device 30, the transmission information transmitted by the transmitting wireless communication device. The receiving unit 212 receives, via the base station device 30, a response signal in response to the response request signal transmitted by the receiving wireless communication device.

The storage unit 22 is realized by, for example, a semiconductor memory device such as a RAM or a flash memory, or a storage device such as a hard disk or an optical disk. The storage unit 22 stores device information including, for example, a device identifier for identifying a wireless communication device, a group identifier for identifying a group to which the wireless communication device belongs, and information indicating a power state. The storage unit 22 stores, for example, reply information including information indicating the presence or absence of a response signal to a response request signal transmitted to each wireless communication device.

The device information stored in the storage unit 22 will be explained using FIG. 5. FIG. 5 is a table showing an example of device information.

As shown in FIG. 5, the device information includes items such as "device identifier," "group identifier," and "power state."

“Device identifier” is an identifier for identifying a wireless communication device. In the case of the wireless communication device 10a, the "device identifier" is "D1".

"Group identifier" is an identifier for identifying a group to which a wireless communication device belongs. In the case of the wireless communication device 10a, the "group identifier" is "G1". A wireless communication device may belong to multiple groups. For example, in the case of the wireless communication device 10b, the "group identifiers" are "G1" and "G2." For example, in the case of the wireless communication device 10e, the "group identifiers" are "G1", "G2", and "G3". There is no limit to the number of groups to which each wireless communication device belongs.

“Power state” indicates the state of the power supply of the wireless communication device. The "power state" indicates "on" when the power state of the wireless communication device is on, and "off" when the power state of the wireless communication device is off. In the case of the wireless communication device 10a, the "power state" is "on".

The reply information stored in the storage unit 22 will be explained using FIG. 6. FIG. 6 is a table showing an example of reply information.

As shown in FIG. 6, the reply information includes items such as "device identifier" and "response signal" for each wireless communication device on the receiving side.

"Response signal" indicates information regarding the presence or absence of a response signal to the response request signal. When the management device 20 receives a response signal to the response request signal, "present" is indicated. If the management device 20 does not receive a response signal to the response request signal, "None" is indicated. For example, in the case of the wireless communication device 10b, the response signal is “present”, and in the case of the wireless communication device 10c, the response signal is “absent”.

Referring again to FIG. The control unit 23 is realized by, for example, a CPU, an MPU, or the like executing a program stored inside the wireless communication device 10 using a RAM or the like as a work area. The control unit 23 is a controller, and may be realized by, for example, an integrated circuit such as an ASIC or an FPGA. The control unit 23 may be realized by a combination of software and hardware. The control unit 23 includes an acquisition unit 231, a determination unit 232, a communication control unit 233, and a storage control unit 234.

The acquisition unit 231 acquires various information via the communication unit 21. The acquisition unit 231 acquires, for example, the device information of the wireless communication device received by the reception unit 212. The acquisition unit 231 acquires, for example, the transmission information received by the reception unit 212. The acquisition unit 231 acquires, for example, the response request signal received by the reception unit 212. The acquisition unit 231 may acquire other information.

The determination unit 232 determines various conditions based on the information acquired by the acquisition unit 231 via the communication unit 21. The determination unit 232 determines the power state of each wireless communication device, for example, based on the device information acquired by the acquisition unit 231. The determination unit 232 determines the power state of each wireless communication device, for example, based on the device information stored in the storage unit 22. The determination unit 232 determines whether or not there is a response signal to the response request signal, based on the reply information stored in the storage unit 22, for example.

The communication control unit 233 controls the communication unit 21 to transmit and receive various information to and from other wireless communication devices via the base station device 30. For example, the communication control unit 233 transmits the transmission information received from the transmitting side wireless communication device to each receiving side wireless communication device. For example, the communication control unit 233 transmits a response request signal to each wireless communication device on the receiving side. For example, the communication control unit 233 transmits a group communication completion notification to the transmitting wireless communication device. The communication control unit 233 may transmit other information to the wireless communication devices on the transmitting side and the receiving side.

The storage control unit 234 stores various types of information acquired by the acquisition unit 151 in the storage unit 14. The storage control unit 154 stores, for example, the device information acquired by the acquisition unit 231 in the storage unit 22. For example, the storage control unit 234 stores the response signal acquired by the acquisition unit 231 in the storage unit 22 as reply information associated with each wireless communication device on the receiving side. The storage control unit 234 may store other information in the storage unit 22.

The processing flow of the wireless communication system according to the embodiment will be explained using FIG. FIG. 7 is a sequence diagram illustrating an example of the processing flow of the wireless communication system according to the embodiment.

In FIG. 7, a wireless communication device 10a is a transmitting side wireless communication device. The wireless communication device 10b and the wireless communication device 10c are receiving side wireless communication devices. In FIG. 7, for the sake of simplicity, a case will be described in which there are two wireless communication devices on the receiving side. In FIG. 7, it is assumed that the wireless communication devices 10a to 10c perform group communication.

When the power is turned on, the wireless communication device 10a transmits device information indicating that the power is turned on to the management device 20 (step S10). When the power is turned on, the wireless communication device 10b transmits device information indicating that the power is turned on to the management device 20 (step S11). When the power is turned on, the wireless communication device 10c transmits device information indicating that the power is turned on to the management device 20 (step S12).

The management device 20 recognizes the wireless communication device in use based on the device information received from the wireless communication devices 10a to 10c (step S13). That is, the management device 20 recognizes a wireless communication device that is powered on among wireless communication devices belonging to the same group.

The wireless communication device 10a transmits the transmission information and the response request signal to the management device 20 by group communication (step S14a). The wireless communication device 10a transmits the transmission information and the response request signal to the wireless communication device 10b by group communication (step S14b). The wireless communication device 10a transmits the transmission information and the response request signal to the wireless communication device 10c by group communication (step S14c). The processes from step S14a to step S14c are executed simultaneously. In step S14b and step S14c, the wireless communication device 10a may directly transmit the transmission information and the response request signal to the wireless communication device 10b and the wireless communication device 10c, or It may also be transmitted via the device 30.

The wireless communication device 10b outputs the transmission information received from the wireless communication device 10a (step S15). The wireless communication device 10b transmits a response signal to the response request signal to the management device 20 (step S16). The management device 20 transmits a reception completion notification for the response signal to the wireless communication device 10b (step S17).

The management device 20 determines which wireless communication devices have not responded to the response request signal (step S18). In the example shown in FIG. 7, the management device 20 determines that the wireless communication device 10c is a wireless communication device that does not respond to the response request signal.

The management device 20 transmits the transmission information and the response request signal to the wireless communication device 10b by group communication (step S19a). The management device 20 transmits the transmission information and the response request signal to the wireless communication device 10c by group communication. The processes of step S19a and step S19b are executed simultaneously.

The wireless communication device 10c outputs the transmission information received from the management device 20 (step S20). Here, since the wireless communication device 10b has received the reception completion notification for the response signal in step S17, it does not output the transmission information received in step S19a. The wireless communication device 10c transmits a response signal to the response request signal to the management device 20 (step S21). The management device 20 transmits a reception completion notification in response to the response signal to the wireless communication device 10c.

The management device 20 determines which wireless communication devices have not responded to the response request signal (step S23). When the management device 20 determines that there is no wireless communication device that has not responded to the response request signal, it transmits a group communication completion notification (step S24). Then, the process of FIG. 7 ends.

Note that in FIG. 7, the wireless communication device 10a may transmit a plurality of pieces of transmission information in steps S14a to S14b. In this case, the management device 20 may repeatedly transmit a plurality of pieces of transmission information to the wireless communication device 10b and the wireless communication device 10c. Then, among the transmission information repeatedly transmitted by the management device 20, the wireless communication device 10b and the wireless communication device 10c do not output the transmission information that has been output once, and selectively output the transmission information that has not been outputted. You can do it like this.

[Processing of transmitting side wireless communication device]
Processing of the transmitting side wireless communication device according to the embodiment will be described using FIG. 8. FIG. 8 is a flowchart illustrating an example of the process flow of the transmitting side wireless communication device according to the embodiment.

The wireless communication device 10 transmits device information (step S101). Specifically, the communication control unit 153 transmits device information to the management device 20 when the wireless communication device 10 is powered on. Then, the process advances to step S102.

The wireless communication device 10 transmits the transmission information and a response request signal (step S102). Specifically, the communication control unit 153 adds a response request signal to the transmission information received by the operation unit 12, and sends the transmission information and the response request signal to the transmitting wireless communication device 10 and the management device 20. Send. Then, the process advances to step S103.

The wireless communication device 10 receives the group communication completion notification (step S103). Specifically, the communication control unit 153 receives the group communication completion notification sent from the management device 20. Then, the process advances to step S104.

The wireless communication device 10 outputs a group communication completion notification (step S104). Specifically, the output control unit 152 causes the output unit 13 to output the group communication completion notification received in step S103. Then, the process of FIG. 8 ends.

[Processing of the wireless communication device on the receiving side]
Processing of the receiving side wireless communication device according to the embodiment will be described using FIG. 9. FIG. 9 is a flowchart illustrating an example of the process flow of the receiving side wireless communication device according to the embodiment.

The process in step S201 is the same process as step S101 shown in FIG. 8, so a description thereof will be omitted.

The wireless communication device 10 receives the transmission information and the response request signal (step S202). Specifically, the communication control unit 153 receives the transmission information and the response request signal transmitted from the management device 20. Then, the process advances to step S203.

The wireless communication device 10 determines whether the transmission information has been output (step S203). Specifically, the output control unit 152 determines whether or not the output unit 13 is caused to output the transmission information. If it is determined that the transmission information has been output (step S203; Yes), the process advances to step S204. On the other hand, if it is determined that the transmission information is not output (step S203; No), the process advances to step S206.

If the determination in step S203 is Yes, the wireless communication device 10 transmits a response signal (step S204). Specifically, the communication control unit 153 transmits a response signal to the response request signal to the management device 20. Then, the process advances to step S205.

The wireless communication device 10 receives the reception completion notification (step S205). Specifically, the communication control unit 153 receives a reception completion notification from the management device 20. Then, the process in FIG. 9 ends.

If the determination in step S203 is No, the wireless communication device 10 determines whether the transmission information and the response request signal have been received again (step S206). Specifically, the communication control unit 153 determines whether the transmission information and the response request signal have been received again from the management device 20. If it is determined that the transmission information and the response request signal have been received again (step S206; Yes), the process advances to step S207. On the other hand, if it is determined that the transmission information and the response request signal have not been received again (step S206; No), the process of FIG. 9 is ended.

If the determination in step S206 is Yes, the wireless communication device 10 determines whether or not the transmission information has been output (step S207). Specifically, the output control unit 152 determines whether or not the output unit 13 is caused to output the transmission information. If it is determined that the transmission information has been output (step S207; Yes), the process advances to step S204. On the other hand, if it is determined that the transmission information is not output (step S207; No), the process advances to step S206.

[Management device processing]
Processing of the management device according to the embodiment will be described using FIG. 10. FIG. 10 is a flowchart illustrating an example of the processing flow of the management device according to the embodiment.

The management device 20 receives device information (step S301). Specifically, when the power state of each managed wireless communication device is turned on, the communication control unit 233 receives device information indicating that the power state is on from each wireless device. . Then, the process advances to step S302.

The management device 20 determines which wireless communication device is in use (step S302). Specifically, the determining unit 232 determines which wireless communication device is powered on based on the device information (step S302). Then, the process advances to step S303.

The management device 20 acquires the transmission information and the response request signal (step S303). Specifically, the acquisition unit 231 acquires, via the base station device 30, the transmission information and response request signal transmitted by the transmitting side wireless communication device. Then, the process advances to step S304.

The management device 20 receives the response signal (step S304). Specifically, the communication control unit 233 receives a response signal transmitted by a receiving wireless communication device in response to a response request signal transmitted by a transmitting wireless communication device. Then, the process advances to step S305.

The management device 20 updates the reply information (step S305). Specifically, the storage control unit 234 updates reply information stored in the storage unit 22 indicating information regarding whether or not a response signal is transmitted in response to the response request signal. Then, the process advances to step S306.

The management device 20 transmits a reception completion notification (step S306). Specifically, the communication control unit 233 transmits a reception completion notification to the transmitting wireless communication device that transmitted the response request signal. Then, the process advances to step S307.

The management device 20 determines whether there is a receiving wireless communication device that does not transmit a response signal (step S307). Specifically, the determination unit 232 determines, based on the reply information stored in the storage unit 22, whether there is a receiving wireless communication device that does not transmit a response signal. If it is determined that there is no receiving wireless communication device that does not transmit a response signal (step S307; No), the process advances to step S308. On the other hand, if it is determined that there is a receiving wireless communication device that does not transmit a response signal (step S307; Yes), the process advances to step S309.

If the determination in step S307 is No, the management device 20 transmits a group communication completion notification (step S308). Specifically, the communication control unit 233 transmits a group communication completion notification to the transmitting wireless communication device. Then, the process in FIG. 10 ends. In step S307, it is determined whether there is a receiving wireless communication device that does not transmit a response signal, but it is determined whether the number of receiving wireless communication devices that do not transmit a response signal is equal to or less than a predetermined number. You may.

If the determination in step S307 is Yes, the management device 20 transmits the transmission information and a response request signal (step S309). Specifically, the communication control unit 233 transmits the transmission information and the response request signal to the receiving wireless communication device that has not transmitted the response signal. Then, the process advances to step S310.

The management device 20 determines whether a response signal has been received (step S310). Specifically, the communication control unit 233 determines whether a response signal to the response request signal transmitted in step S309 has been received. If it is determined that a response signal has been received (step S310; Yes), the process advances to step S305. If it is determined that no response signal has been received (step S310; No), the process advances to step S311.

If the determination in step S310 is No, the management device 20 determines whether a predetermined condition is satisfied (step S311). Specifically, the determination unit 232 determines whether a predetermined condition is satisfied. The predetermined conditions include a case where a predetermined time has elapsed, a case where response signals are received from a predetermined number or more of receiving wireless communication devices, and the like. If it is determined that the predetermined condition is satisfied (step S311; Yes), the process advances to step S308. On the other hand, if it is determined that the predetermined condition is not satisfied (step S311; No), the process advances to step S309.

As described above, in this embodiment, if there is a receiving wireless communication device that does not receive a response signal to the transmission information transmitted by the transmitting wireless communication device 10a, the transmission information is repeatedly transmitted. Therefore, the wireless communication device on the receiving side can appropriately receive the transmitted information. Thereby, in this embodiment, for example, highly urgent information can be more appropriately transmitted to the receiving side wireless communication device.

In this embodiment, the transmitting side wireless communication device 10a transmits a response request signal together with the transmission information to the receiving side wireless communication device. After receiving and outputting the transmission information, the wireless communication device on the receiving side transmits a response signal to the management device in response to the response request signal. Then, the receiving side wireless communication device receives a reception completion notification for the response signal from the management device. After receiving the reception completion notification, the receiving wireless communication device stops outputting the same transmitted information even if it receives the transmitted information transmitted by the transmitting wireless communication device. As a result, in this embodiment, since the transmission information that the user has confirmed once is not output, it is possible to eliminate the trouble of repeatedly displaying the transmission information.

In this embodiment, when the transmitting side wireless communication device 10a transmits a plurality of transmission information, the receiving side wireless communication device does not output the information that has been displayed once, and transmits the information without outputting it. Output information selectively. As a result, the present embodiment can eliminate the inconvenience of repeatedly displaying transmission information even when the receiving wireless communication device receives a plurality of pieces of transmission information.

[Modification of embodiment]
In the embodiment described above, the transmitting side wireless communication device 10a is described as transmitting transmission information including text information, audio information, etc., but the present disclosure is not limited to this. The wireless communication device 10a may transmit only the information identifier. In this case, each wireless communication device may internally store transmission information such as text information or audio information that is associated with the information identifier on a one-to-one basis. In a modification of the embodiment, upon receiving the information identifier, the receiving wireless communication device may output transmission information associated with the received information identifier. Then, similarly to the embodiment, the wireless communication device on the receiving side may stop outputting the transmission information associated with the information identifier once output.

In a modification of the embodiment, the transmitting side wireless communication device 10a can achieve the same effects as the embodiment by only transmitting the information identifier without transmitting the transmission information. Thereby, in the modified example of the embodiment, the amount of data to be transmitted can be reduced. Thereby, in the modified example of the embodiment, lines can be used efficiently.

Although the embodiments of the present disclosure have been described above, the present disclosure is not limited by the contents of these embodiments. Furthermore, the above-mentioned components include those that can be easily assumed by those skilled in the art, those that are substantially the same, and those that are in a so-called equivalent range. Furthermore, the aforementioned components can be combined as appropriate. Furthermore, various omissions, substitutions, or modifications of the constituent elements can be made without departing from the gist of the embodiments described above.

1 Wireless communication system 10 Wireless communication device 11, 21 Communication unit 111, 211 Transmission unit 112, 212 Receiving unit 12 Operation unit 13 Output unit 14, 22 Storage unit 15, 23 Control unit 151, 231 Acquisition unit 152 Output control unit 153, 233 communication control unit 154, 234 storage control unit 20 management device 232 determination unit 30 base station device

Claims (5)

an acquisition unit that acquires communication information including a response request signal transmitted from the transmitting side wireless communication device via the communication unit;
an output control unit that outputs the transmission information to an output unit;
a communication control unit that transmits a response signal to the response request signal to a management device via the communication unit when the output control unit causes the output unit to output the transmission information;
Equipped with
The transmission information has an information identifier added thereto according to the content of the transmission information,
After the acquisition unit acquires a reception completion notification in response to the response signal from the management device, the output control unit transmits second information to which the same information identifier as the first transmission information corresponding to the reception completion notification is added. If the second transmission information is received from the management device, the second transmission information is not output to the output unit;
Wireless communication device. further comprising a storage control unit that stores reception history information including the information identifier of the first transmission information or the second transmission information corresponding to the plurality of reception completion notifications acquired from the management device in a storage unit ,
The output control unit transmits the second transmission information to the output unit when the reception history information includes an information identifier added to the second transmission information that the acquisition unit acquired from the management device. outputting the second transmission information to the output unit if the information identifier added to the second transmission information is not included in the reception history information;
The wireless communication device according to claim 1. The wireless communication device according to claim 1 or 2,
a management device that transmits the transmission information to the wireless communication device;
including;
The management device repeatedly transmits the first transmission information transmitted by the transmitting wireless communication device as the second transmission information to the wireless communication device for a predetermined period of time.
Wireless communication system. The management device includes:
a management communication unit receiving the response signal from the wireless communication device to the first transmission information or the second transmission information;
When a predetermined time has elapsed or when response signals have been received from a predetermined number of the wireless communication devices for group communication, the management communication unit transmits a notification of completion of transmission of the transmission information to the transmitting side wireless communication device. do,
The wireless communication system according to claim 3. acquiring transmission information including a response request signal transmitted from the transmitting side wireless communication device via the communication unit;
outputting the transmission information to an output unit;
When the output unit outputs the transmission information, transmitting a response signal to the response request signal to the management device via the communication unit;
including;
The transmission information has an information identifier added thereto according to the content of the transmission information,
In the step of outputting the transmission information to the output unit, after obtaining a reception completion notification for the response signal from the management device, the information identifier that is the same as the first transmission information corresponding to the reception completion notification is added. not outputting the second transmission information to the output unit when the second transmission information is received from the management device ;
Wireless communication method.

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