JP7430621B2 - Transmitting device and communication system - Google Patents

Description

The present disclosure relates to a transmitting device and a communication system.

Communication systems using advertisement packets have been known for a long time. For example, in the communication system described in Patent Document 1, when power supply is started, the short-range wireless communication unit performs initialization processing and enters an advertising state. When the transmitting device enters the advertising state, it periodically broadcasts advertising information to the surrounding area at a cycle corresponding to the advertising interval. By receiving the advertisement information, the receiving device can recognize the existence of the transmitting device. When the receiving device transmits a communication connection request to the transmitting device, a communication connection is possible between the transmitting device and the receiving device.

JP2019-215820A

However, advertisement packets from multiple transmitting devices may interfere and the receiving device may not be able to receive the advertisement packets.

Alternatively, if advertisement packets from multiple transmitters arrive at the receiver at the same time or at short time intervals, the receiver may receive multiple advertisement packets due to radio interference, buffer capacity, processing performance, etc. You may not be able to receive it.

Therefore, an object of the present invention is to provide a transmitting device and a communication system in which a receiving device can receive advertisement packets from a plurality of transmitting devices.

A transmitting device of the present invention includes a communication device configured to be able to transmit an advertisement packet and configured to be able to receive a scan request packet transmitted as a response to the advertisement packet, and a communication device configured to perform a scan after broadcasting the advertisement packet. and a communication control unit that causes the communication device to stop transmitting the next advertisement packet until a first time period elapses from the time when the scan request packet is received when the request packet is received.

A transmitting device of the present invention includes a communication device configured to be able to transmit an advertisement packet, and configured to be able to receive a scan request packet transmitted as a response to the advertisement packet, and a transmission command packet representing a command to transmit the advertisement packet; The communication control unit includes a communication control unit that causes the communication device to stop transmitting the next advertisement packet until the communication device receives a transmission command packet when the communication device receives a scan request packet after broadcast transmission of the advertisement packet.

A communication system of the present invention includes a plurality of the above-described transmitting devices and a plurality of receiving devices, wherein the receiving device is configured to be able to receive advertisement packets and configured to be able to transmit scan request packets. and a communication control unit that causes the first communication device to transmit a scan request packet when the first communication device receives an advertisement packet.

A communication system of the present invention includes a plurality of the above-described transmitting devices and a plurality of receiving devices, the receiving device being configured to be able to receive advertisement packets, scan request packets, and transmission command packets. a first communication device configured to be able to transmit a scan request packet, and when the first communication device receives an advertisement packet, causes the first communication device to transmit a scan request packet, and the first communication device receives the last advertisement packet. and a communication control unit that causes the first communication device to transmit a transmission command packet if a new advertisement packet is not received even after a certain period of time has passed.

A communication system of the present invention is a communication system including a plurality of the above-described transmitting devices, a plurality of receiving devices, and a monitoring control device, wherein the receiving device is configured to be able to receive advertisement packets, and scan request packets. , a first communication device configured to be able to transmit a transmission command packet, and a first communication device configured to be connected to a monitoring control device and configured to be able to transmit information identifying a transmitting device that is a source of an advertisement packet, and a first communication device configured to be able to transmit a transmission command packet, and a first communication device configured to be able to transmit information that identifies a transmitting device that is a source of an advertisement packet, and a first communication device that is configured to be able to transmit a transmission command packet; A second communication device configured to be able to receive a detection completion notification indicating that the total number has reached a specified value, and communication that causes the first communication device to transmit a scan request packet when the first communication device receives an advertisement packet. and a control section. The communication control unit causes the second communication device to transmit information that identifies a transmitting device that is a source of the received advertisement packet. The communication control unit causes the first communication device to transmit a transmission command packet when the second communication device receives the detection completion notification. The supervisory control device is connected to a receiving device, is configured to be able to receive information that identifies the transmitting device that is the source of the advertisement packet, is configured to be able to send a detection completion notification, and is configured to receive information that identifies the transmitting device. and a management unit that determines whether the total number of detected transmitting devices has reached a specified value based on the.

According to the present invention, a receiving device can receive advertisement packets from a plurality of transmitting devices.

1 is a diagram schematically showing the overall configuration of a communication system according to Embodiment 1. FIG. 1 is a block diagram showing the configuration of a transmitting device 10 according to Embodiment 1. FIG. 1 is a block diagram showing the configuration of a receiving device 20 according to Embodiment 1. FIG. 1 is a block diagram showing the configuration of a supervisory control device 30 according to Embodiment 1. FIG. FIG. 2 is a diagram showing an outline of a conventional communication sequence. FIG. 3 is a diagram showing an overview of a communication sequence according to the first embodiment. 5 is a flowchart showing a processing procedure of the transmitting device 10 according to the first embodiment. 3 is a flowchart showing a processing procedure of the receiving device 20 according to the first embodiment. 3 is a flowchart showing a processing procedure of the monitoring and control device 30 according to the first embodiment. FIG. 3 is a diagram showing an example of occupant location information. FIG. 3 is a diagram showing an overview of a communication sequence in Embodiment 2; 7 is a flowchart showing the processing procedure of the transmitting device 10 according to the second embodiment. 7 is a flowchart showing a processing procedure of the receiving device 20 according to the second embodiment. 12 is a diagram showing an overview of a communication sequence in Embodiment 3. FIG. 12 is a flowchart showing the processing procedure of the transmitting device 10 according to the third embodiment. 12 is a flowchart showing the processing procedure of the receiving device 20 according to the third embodiment. 12 is a diagram showing an overview of a communication sequence in Embodiment 4. FIG. 12 is a flowchart showing a processing procedure of the receiving device 20 according to the fourth embodiment. 12 is a flowchart showing a processing procedure of the monitoring control device 30 according to the fourth embodiment. 12 is a diagram showing an overview of a communication sequence in Embodiment 5. FIG. 12 is a flowchart showing the processing procedure of the receiving device 20 according to the fifth embodiment.

Hereinafter, embodiments will be described in detail with reference to the drawings. Note that the same or corresponding parts in the figures are designated by the same reference numerals, and the description thereof will not be repeated in principle.

[Embodiment 1]
(Overall configuration of communication system)
FIG. 1 is a diagram schematically showing the overall configuration of a communication system 1 according to the first embodiment. Below, as an example, a case will be described in which the communication system 1 according to the first embodiment is applied to a ship.

The communication system 1 is a system for managing the positions and conditions of crew members in a ship. The communication system 1 includes a plurality of transmitting devices 10 (transmitting devices 10-1, 10-2, ...), a plurality of receiving devices 20 (receiving devices 20-1, 20-2, ...), and a monitoring control device 30. , and a communication cable 40.

The transmitting devices 10-1, 10-2, . . . are carried by crew members (sailors) 2-1, 2-2, . Each of the transmitting devices 10-1, 10-2, . . . is assigned a transmitting device ID for individual identification. In the following, each of the transmitting devices 10-1, 10-2, . . . will also be referred to as a "transmitting device 10" unless the transmitting devices 10-1, 10-2, . . . are particularly distinguished. When the occupants 2-1, 2-2, . . . are not particularly distinguished, each of the occupants 2-1, 2-2, . . . is also referred to as “occupant 2.”

The transmitting device 10 broadcasts information regarding the occupant 2 using radio waves. The transmitting device 10 is a portable transmitting device powered by a rechargeable battery.

The transmitting device 10 broadcasts an advertisement packet in accordance with the Bluetooth (registered trademark) Low Energy (BLE) standard. After transmitting the advertisement packet, the transmitting device 10 receives a scan request packet from the receiving device 20 and returns a scan response packet.

The receiving devices 20-1, 20-2, . . . are installed, for example, in each area divided by a wall or the like inside the ship. Each of the receiving devices 20-1, 20-2, . . . is assigned a receiving device ID for individual identification. In the following, each of the receiving devices 20-1, 20-2, . . . is also referred to as a “receiving device 20” unless the receiving devices 20-1, 20-2, . . . are particularly distinguished. Each of the receiving devices 20-1, 20-2, . . . may be a simple repeater.

Each of the receiving devices 20-1, 20-2, . . . is communicably connected to the supervisory control device 30 via a communication cable 40. The receiving device 20 is configured to be able to receive advertisement packets broadcast from the transmitting device 10.

Transmission device 10 includes a biosensor that detects biometric information of occupant 2 . The transmitting device 10 stores biometric information and information on a transmitting device ID that identifies the transmitting device 10 in an advertisement packet.

As the format of the advertisement packet, for example, a format based on the Bluetooth (registered trademark) specifications managed by the Bluetooth SIG (Special Interest Group) can be used. Alternatively, you can use a highly versatile format such as "iBeacon (registered trademark)" published by Apple (registered trademark) or "Eddystone (registered trademark)" published by Google (registered trademark). You can.

In addition to the biological information and the transmitting device ID included in the advertising packet, the receiving device 20 receives passenger information including receiving strength information indicating the receiving strength of the advertising packet, receiving time information indicating the receiving time, and the receiving device ID. The information is sent to the supervisory control device 30.

The monitoring control device 30 can identify the occupant 2 based on the transmitting device ID based on the occupant information received from the receiving device 20.

The monitoring control device 30 can estimate the position of the occupant 2 based on the reception strength information, reception time information, and receiving device ID included in the occupant information. The monitoring control device 30 can estimate the condition of the occupant 2 from the biological information of the occupant 2.

The monitoring control device 30 updates occupant location information based on the occupant information received from the receiving device 20. The occupant location information includes the ID and number of occupants located in each area.

Hereinafter, details of each configuration of the transmitting device 10, the receiving device 20, and the supervisory control device 30 included in the communication system 1 will be explained in order.

(Configuration of transmitting device 10)
FIG. 2 is a block diagram showing the configuration of transmitting device 10 according to the first embodiment. The transmitting device 10 includes a CPU (Central Processing Unit) 11, a storage device 12, a RAM (Random Access Memory) 13, a communication device 14, a biosensor 15, and a battery 16.

The storage device 12 includes a rewritable nonvolatile memory such as a ROM (Read Only Memory). The storage device 12 may include at least one of a hard disk drive and a solid state drive (SSD). The storage device 12 stores various programs executed by the CPU 11. Various programs read by the CPU 11 are expanded into the RAM 13. The RAM 13 functions as a working memory that temporarily stores data processed by the CPU 11. The storage device 12 also stores the common key received from the supervisory control device 30.

The communication device 14 is configured to be able to broadcast advertise packets according to instructions from the CPU 11 . After transmitting the advertisement packet, the communication device 14 is configured to be able to receive a scan request packet sent from the receiving device 20 as a response to the advertisement packet. The communication device 14 is configured to be able to transmit a scan response packet as a reply to the scan request packet according to a command from the CPU 11. The communication device 14 may be configured to not transmit a scan response packet as a response even if it receives a scan request packet.

The biosensor 15 outputs biometric information (for example, pulse rate, heartbeat, body temperature, etc.) of the occupant 2 to whom the transmitting device 10 is attached. The biosensor 15 may measure values such as pulse rate, heartbeat, and body temperature, and output the measured values as biometric information, or may evaluate the condition of the occupant 2 based on the measured values and send the evaluation results to the biometric information. It may be output as information.

The battery 16 is mounted on the transmitting device 10 as a power source. The battery 16 is, for example, a secondary battery such as a nickel metal hydride battery or a lithium ion battery. For example, battery 16 can be charged by connecting transmitting device 10 to a dedicated charger (not shown). When charging the battery 16, for example, the CPU 11 monitors the state of charge of the battery 16, and when the SOC (State of Charge) of the battery 16 reaches a predetermined SOC, sends a command to the charger to stop power supply.

The CPU 11 controls various processes of the transmitting device 10 by executing various programs stored in the storage device 12 . As a specific example, the CPU 11 functions as the communication control section 111 and the generation section 113 by executing various programs.

The generation unit 113 generates an advertisement packet.

When the communication device 14 receives a scan request packet after transmitting an advertisement packet, the communication control unit 111 causes the communication device 14 to transmit the next advertisement packet to the communication device 14 until a first time period elapses from the time when the scan request packet is received. stop sending. The first time can be, for example, 1 [sec].

If the communication device 14 does not receive the scan request packet after transmitting the advertisement packet, the communication control unit 111 causes the communication device 14 to retransmit the transmitted advertisement packet after a second time period that is shorter than the first time period. . The second time can be, for example, 100±α [msec].

(Configuration of receiving device 20)
FIG. 3 is a block diagram showing the configuration of receiving device 20 according to the first embodiment. The receiving device 20 includes a CPU 21 , a storage device 22 , a RAM 23 , a first communication device 24 , and a second communication device 25 .

The storage device 22 includes, for example, a rewritable nonvolatile memory such as a ROM. Storage device 22 may include at least one of a hard disk drive and an SSD. The storage device 22 stores various programs executed by the CPU 21. Various programs read by the CPU 21 are developed in the RAM 23. The RAM 23 functions as a working memory that temporarily stores data processed by the CPU 21.

The first communication device 24 is configured to be able to receive advertisement packets broadcast by the transmitting device 10 and scan response packets transmitted by the transmitting device 10. The first communication device 24 is configured to be able to transmit a scan request packet to the transmitting device 10.

The second communication device 25 is connected to the supervisory control device 30 through a communication cable 40 (see FIG. 1). The second communication device 25 is configured to be able to transmit occupant information to the supervisory control device 30.

The CPU 21 controls various processes of the receiving device 20 by executing various programs stored in the storage device 22 . As a specific example, the CPU 21 functions as a communication control section 215 and an occupant information generation section 216 by executing various programs.

The communication control unit 215 causes the first communication device 24 to transmit a scan request packet when the first communication device 24 receives the advertisement packet. The communication control unit 215 causes the second communication device 25 to transmit occupant information.

The occupant information generation unit 216 generates occupant information including the ID of the transmitting device that is the source of the received advertisement packet.

(Configuration of supervisory control device 30)
FIG. 4 is a block diagram showing the configuration of the supervisory control device 30 according to the first embodiment. The supervisory control device 30 includes a CPU 31 , a storage device 32 , a RAM 33 , a communication device 34 , a communication interface 35 , and a display 36 .

The storage device 32 includes, for example, a rewritable nonvolatile memory such as a ROM. Storage device 32 may include at least one of a hard disk drive and an SSD. The storage device 32 stores various programs executed by the CPU 31. Various programs read by the CPU 31 are expanded into the RAM 33. The RAM 33 functions as a working memory that temporarily stores data processed by the CPU 31.

The communication device 34 is connected to a plurality of receiving devices 20 through communication cables 40 . The communication device 34 is configured to be able to receive occupant information including the ID of the transmitting device that is the source of the advertisement packet.

Display 36 is, for example, a liquid crystal display. Display 36 displays various information.

The CPU 31 controls various processes of the supervisory control device 30 by executing various programs stored in the storage device 32. As a specific example, the CPU 31 functions as an occupant management section 311 and a communication control section 313 by executing various programs.

Upon receiving the occupant information, the communication control unit 313 sends the received occupant information to the occupant management unit 311 .

The occupant management unit 311 updates occupant location information representing the transmitting device whose location was detected within the third time period based on the received occupant information. The occupant management unit 311 displays occupant location information on the display 36 every third time. The third time period may be twice the first time period. When the first time is 1 [sec], the third time is 2 [sec]. That is, the advertisement packet is transmitted at a shorter time interval (first time) than the time interval (third time) at which the display of occupant location information is updated. If the advertising packet transmission interval (first time) is short, the receiving device may fail to receive the advertising packet. On the other hand, if the advertising packet transmission interval (first time) is long, it becomes impossible to notify the latest occupant's whereabouts. The reason why the advertising packet transmission interval (first time) is set to 1/2 of the update timing (third time) of the display of crew location information is to reduce the chance of receiving advertising packets being missed by the receiving device, and to update the latest information as much as possible. This is to make it possible to notify the occupant's whereabouts.

(Overview of conventional communication sequence)
FIG. 5 is a diagram showing an outline of a conventional communication sequence.

Conventionally, the transmitting device 10-1 broadcasts advertisement packets at a set predetermined period. The predetermined period is defined by the BLE standard. Here, the predetermined period is 100 [msec].

The transmitting device 10-1 broadcasts an advertisement packet 700 including the transmitting device ID of the transmitting device 10-1 and the biological information of the occupant 2-1.

The receiving device 20-1 executes internal processing 1000 as described below. Receiving device 20-1 receives advertising packet 700. In addition to the biological information and the transmitting device ID included in the advertising packet 700, the receiving device 20-1 receives receiving strength information indicating the receiving strength of the advertising packet 700, receiving time information indicating the receiving time, and the receiving device ID. The occupant information 500 of the occupant 2-1, including the occupant information 500, is stored in the RAM 23.

The receiving device 20-1 transmits a scan request packet 800 including the ID of the receiving device 20-1 to the transmitting device 10-1.

The transmitting device 10-1 receives the scan request packet 800. The transmitting device 10-1 extracts the ID of the receiving device 20-1 from the received scan request packet. The transmitting device 10-1 transmits a scan response packet 900 including the ID of the transmitting device 10-1 to the receiving device 20-1.

Receiving device 20-1 receives scan response packet 900. The receiving device 20-1 transmits the occupant information 500 of the occupant 2-1 stored in the RAM 23 to the supervisory control device 30.

The supervisory control device 30 receives the occupant information 500 of the occupant 2-1. The monitoring control device 30 updates the occupant location information based on the received occupant information 500 of the occupant 2-1.

The advertising packet 710 is also broadcast transmitted from the transmitting device 10-2.

The transmitting device 10-1 transmits the advertisement packet 701 after a period of 100 [msec] has elapsed from the time ta at which the advertisement packet 700 was transmitted, but because it interferes with the advertisement packet 710 transmitted from the transmitting device 10-2. , advertisement packet 701 does not reach the receiving device 20-1.

(Summary of communication sequence in Embodiment 1)
FIG. 6 is a diagram showing an overview of the communication sequence of the first embodiment.

The transmitting device 10-1 broadcasts an advertisement packet 700 including the ID of the transmitting device 10-1 and the biometric information of the occupant 2-1.

The receiving device 20-1 executes internal processing 1000 as described below. Receiving device 20-1 receives advertising packet 700. In addition to the biological information and the transmitting device ID included in the advertising packet 700, the receiving device 20-1 receives receiving strength information indicating the receiving strength of the advertising packet 700, receiving time information indicating the receiving time, and the receiving device ID. The occupant information 500 of the occupant 2-1, including the occupant information 500, is stored in the RAM 23.

The receiving device 20-1 transmits a scan request packet 800 including the ID of the receiving device 20-1 to the transmitting device 10-1.

The transmitting device 10-1 receives the scan request packet 800. The transmitting device 10-1 extracts the ID of the receiving device 20-1 from the received scan request packet 800. The transmitting device 10-1 transmits a scan response packet 900 including the ID of the transmitting device 10-1 to the receiving device 20-1.

Receiving device 20-1 receives scan response packet 900. The receiving device 20-1 transmits the occupant information 500 of the occupant 2-1 stored in the RAM 23 to the supervisory control device 30.

The supervisory control device 30 receives the occupant information 500 of the occupant 2-1. The monitoring control device 30 updates the occupant location information based on the received occupant information 500 of the occupant 2-1.

Similar processing is executed in the transmitting devices 10-2 and 10-3 as follows.

Transmitting device 10-2 broadcasts advertising packet 710. Receiving device 20-1 receives advertising packet 710, stores occupant information 510 of occupant 2-2 in RAM 23, and transmits scan request packet 810 to transmitting device 10-2. Transmitting device 10-2 receives scan request packet 810 and transmits scan response packet 910 to receiving device 20-1. The receiving device 20-1 receives the scan response packet 910 and transmits the occupant information 510 of the occupant 2-2 to the supervisory control device 30. The monitoring control device 30 receives the occupant information 510 of the occupant 2-2, and updates the occupant location information based on the received occupant information 510 of the occupant 2-2.

The transmitting device 10-3 broadcasts the advertisement packet 720. Receiving device 20-1 receives advertising packet 720, stores occupant information 520 of occupant 2-3 in RAM 23, and transmits scan request packet 820 to transmitting device 10-3. The transmitting device 10-3 receives the scan request packet 820 and transmits the scan response packet 920 to the receiving device 20-1. The receiving device 20-1 receives the scan response packet 920 and transmits the occupant information 520 of the occupant 2-3 to the supervisory control device 30. The monitoring control device 30 receives the occupant information 520 of the occupant 2-3, and updates the occupant location information based on the received occupant information 520 of the occupant 2-3.

The transmitting device 10-1 stops transmitting the advertising packet at time t1 when it receives the scan request packet 900.

The transmitting device 10-1 cancels the suspension of advertising packet transmission after a first time ΔT1 has elapsed from the time t1 at which the scan request packet 900 was received. The transmitting device 10-1 broadcasts the newly created advertisement packet 701. Receiving device 20-1 receives advertising packet 701, stores occupant information 501 of occupant 2-1 in RAM 23, and transmits scan request packet 801 to transmitting device 10-1. The transmitting device 10-1 receives the scan request packet 801 and transmits the scan response packet 901 to the receiving device 20-1. The receiving device 20-1 receives the scan response packet 901 and transmits the occupant information 501 of the occupant 2-1 to the supervisory control device 30. The monitoring control device 30 receives the occupant information 501 of the occupant 2-1, and updates the occupant location information based on the received occupant information 501 of the occupant 2-1.

(Processing procedure of transmitting device 10)
FIG. 7 is a flowchart showing the processing procedure of the transmitting device 10 according to the first embodiment.

In step S<b>101 , the generating unit 113 of the transmitting device 10 generates an advertisement packet including the transmitting device ID of the transmitting device 10 and biometric information output from the biometric sensor 15 . The communication control unit 111 of the transmitting device 10 causes the communication device 14 to broadcast an advertisement packet.

In step S102, the communication control unit 111 of the transmitting device 10 determines whether the communication device 14 has received the scan request packet within a certain period of time after the advertisement packet was transmitted. If a scan request packet is received, the process advances to step S103. If the scan request packet is not received, the process advances to step S106.

In step S103, the communication control unit 111 of the transmitting device 10 identifies the receiving device 20 that transmitted the scan request packet based on the receiving device ID included in the received scan request packet.

In step S104, the communication control unit 111 of the transmitting device 10 causes the communication device 14 to transmit a scan response packet including the transmitting device ID to the specified receiving device 20.

In step S105, the communication control unit 111 of the transmitting device 10 waits for a first time ΔT1 to elapse from the time when the scan request packet is received. The first time ΔT1 can be, for example, 1 [sec]. After that, the process returns to step S101, and the next advertisement packet is generated and transmitted.

In step S106, the communication control unit 111 of the transmitting device 10 waits until a second time (100-α [msec] or 100+α [msec]) has elapsed since the advertisement packet was transmitted in step S101. wait.

In step S107, the communication control unit 111 of the transmitting device 10 retransmits the advertisement packet transmitted in step S101 to the communication device 14, and returns to step S101. Note that, if necessary, after executing step S106, step S107 may be omitted and the process may return to step S101.

(Processing procedure of receiving device 20)
FIG. 8 is a flowchart showing the processing procedure of the receiving device 20 of the first embodiment.

In step S201, the communication control unit 215 of the receiving device 20 determines whether the first communication device 24 has received an advertising packet. If an advertising packet has been received, the process advances to step S202. If an advertising packet is not received, step S201 is repeated.

In step S202, the communication control unit 215 of the receiving device 20 identifies the transmitting device 10 that transmitted the advertising packet based on the transmitting device ID included in the received advertising packet. In addition to the biological information and the transmitting device ID included in the advertising packet, the occupant information generation unit 216 of the receiving device 20 generates reception strength information indicating the receiving strength of the advertising packet, receiving time information indicating the receiving time, and the receiving device ID. Generate occupant information including.

In step S203, the communication control unit 215 of the receiving device 20 causes the first communication device 24 to transmit a scan request packet including the receiving device ID to the specified transmitting device 10.

In step S204, the communication control unit 215 of the receiving device 20 determines whether the first communication device 24 has received the scan response packet within a certain period of time after the scan request packet was transmitted. If a scan request packet is received, the process advances to step S205. If the scan request packet is not received, the process returns to step S203. Thereby, reception of the scan request packet from the transmitting device 10 and reception of the scan response packet by the receiving device 20 can be ensured. Furthermore, in order to prevent the transmitting device 10 from being unable to escape from the loop configured by step S203 and step S204 when the transmitting device 10 leaves the communication range of the receiving device 20, the loop configured by step S203 and step S204 is If the number of consecutive executions exceeds a predetermined number of times or exceeds a predetermined time, the process may shift from step S204 to step S205 even if the scan response packet is not received. Furthermore, a delay of a predetermined time Tc may be inserted between step 203 and step 204 to prevent congestion.

In step S205, the communication control unit 215 of the receiving device 20 causes the second communication device 25 to transmit the occupant information generated in step S202 to the monitoring control device 30.

(Processing procedure of supervisory control device 30)
FIG. 9 is a flowchart showing the processing procedure of the supervisory control device 30 according to the first embodiment.

In step S301, the communication control unit 313 of the supervisory control device 30 determines whether the communication device 34 has received occupant information from any of the receiving devices 20. If occupant information has been received, the process advances to step S302.

In step S302, the occupant management unit 311 of the monitoring and control device 30 updates occupant location information based on the received occupant information.

In step S303, the communication control unit 313 of the supervisory control device 30 determines whether a third period of time has elapsed from the time when the previous occupant location information was displayed. If the third period of time has elapsed, the process advances to step S304. The third time can be, for example, 2 [sec].

In step S304, the occupant management unit 311 of the monitoring and control device 30 displays occupant location information on the display 36.

In step S305, the occupant management unit 311 of the monitoring and control device 30 resets the occupant location information. As a result, the occupant location information no longer includes anything.

Through the above-described processing, the occupant location information is updated to the latest information on the display 36 of the supervisory control device 30 every 2 [sec]. FIG. 10 is a diagram showing an example of occupant location information. The occupant location information allows the occupant ID and number of occupants to be known for each area. In step S305, instead of resetting the occupant location information, since it is thought that there is some abnormality with the occupant, a warning may be alerted by flashing or red display.

In FIG. 10, it is assumed that occupants are displayed for each area, but the latest location information update time, location area information at that time, biometric information, etc. may be displayed for each occupant ID.

When the processing time required for the receiving device 20 to receive the advertisement packet and transmit the occupant information based on the advertisement packet to the supervisory control device 30 is the processing time Tex, the second time is the processing time Tex. Longer is desirable. The first time ΔT1 is longer than the time when one receiving device 20 constituting the communication system 1 multiplies the processing time Tex by the maximum number of transmitting devices 20 that are expected to receive signals within the third time period. Preferably long.

According to the present embodiment, when the transmitting device receives a scan request packet after transmitting an advertisement packet, the transmitting device does not transmit the next advertisement packet until the first time period elapses from the time when the transmitter receives the scan request packet. Stop. This allows the receiving device to receive advertisement packets from multiple transmitting devices without missing any.

[Embodiment 2]
(Configuration of transmitting device 10)
The differences between the communication device 14 and the communication control unit 111 of the second embodiment from the communication device 14 and the communication control unit 111 of the first embodiment will be explained.

The communication device 14 is configured to be able to receive a transmission command packet representing a command to transmit an advertisement packet.

When the communication device 14 receives the scan request packet after transmitting the advertisement packet, the communication control unit 111 causes the communication device 14 to stop transmitting the next advertisement packet until the communication device 14 receives the transmission command packet. . The communication control unit 111 causes the communication device 14 to transmit the next advertisement packet immediately after the communication device 14 receives the transmission command packet.

(Configuration of receiving device 20)
The differences between the first communication device 24 and the communication control unit 215 of the second embodiment from the first communication device 24 and the communication control unit 215 of the first embodiment will be explained.

The first communication device 24 is configured to be able to transmit a transmission command packet representing a command to transmit an advertisement packet.

If the first communication device 24 does not receive a new advertisement packet even after a predetermined period of time has passed since the first communication device 24 received the last advertisement packet, the communication control unit 215 causes the first communication device 24 to transmit a transmission command packet. . More specifically, the communication control unit 215 causes the first communication device 24 to sequentially transmit transmission command packets to each transmitting device 20 at time intervals of ΔTa.

(Configuration of supervisory control device 30)
The configuration of the supervisory control device 30 of the second embodiment is similar to the configuration of the supervisory control device 30 of the first embodiment.

(Summary of communication sequence in Embodiment 2)
FIG. 11 is a diagram showing an overview of the communication sequence of the second embodiment.

The transmitting device 10-1 broadcasts an advertisement packet 700 including the ID of the transmitting device 10-1 and the biometric information of the occupant 2-1.

The receiving device 20-1 executes internal processing 1000 as described below. Receiving device 20-1 receives advertising packet 700. In addition to the biological information and the transmitting device ID included in the advertising packet 700, the receiving device 20-1 receives receiving strength information indicating the receiving strength of the advertising packet 700, receiving time information indicating the receiving time, and the receiving device ID. The occupant information 500 of the occupant 2-1, including the occupant information 500, is stored in the RAM 23.

The receiving device 20-1 transmits a scan request packet 800 including the ID of the receiving device 20-1 to the transmitting device 10-1.

The transmitting device 10-1 receives the scan request packet 800. The transmitting device 10-1 extracts the ID of the receiving device 20-1 from the received scan request packet 800. The transmitting device 10-1 transmits a scan response packet 900 including the ID of the transmitting device 10-1 to the receiving device 20-1.

Receiving device 20-1 receives scan response packet 900. The receiving device 20-1 transmits the occupant information 500 of the occupant 2-1 stored in the RAM 23 to the supervisory control device 30.

The supervisory control device 30 receives the occupant information 500 of the occupant 2-1. The monitoring control device 30 updates the occupant location information based on the received occupant information 500 of the occupant 2-1.

Similar processing is executed in the transmitting devices 10-2 and 10-3 as follows.

The transmitting device 10-2 broadcasts an advertisement packet 710. Receiving device 20-1 receives advertising packet 710, stores occupant information 510 of occupant 2-2 in RAM 23, and transmits scan request packet 810 to transmitting device 10-2. Transmitting device 10-2 receives scan request packet 810 and transmits scan response packet 910 to receiving device 20-1. The receiving device 20-1 receives the scan response packet 910 and transmits the occupant information 510 of the occupant 2-2 to the supervisory control device 30. The monitoring control device 30 receives the occupant information 510 of the occupant 2-2, and updates the occupant location information based on the occupant information 510 of the occupant 2-2.

The transmitting device 10-3 broadcasts the advertisement packet 720. Receiving device 20-1 receives advertising packet 720, stores occupant information 520 of occupant 2-3 in RAM 23, and transmits scan request packet 820 to transmitting device 10-3. Transmitting device 10-3 receives scan request packet 820 and transmits scan response packet 920 to receiving device 20-1. The receiving device 20-1 receives the scan response packet 920 and transmits the occupant information 520 of the occupant 2-3 to the supervisory control device 30. The monitoring control device 30 receives the occupant information 520 of the occupant 2-3, and updates the occupant location information based on the received occupant information 520 of the occupant 2-3.

The transmitting device 10-1 stops transmitting advertisement packets at time t1 when it receives the scan request packet 900.

The receiving device 20-1 transmits the transmission command packet 601 to the transmitting device when the condition that no new advertising packet is received even after the time ΔTx has elapsed from the time tx when the last advertising packet 720 was received is satisfied. Send to 10-1.

Immediately after receiving the transmission command packet 601, the transmitting device 10-1 cancels the suspension of advertising packet transmission. The transmitting device 10-1 broadcasts an advertisement packet 701. Receiving device 20-1 receives advertising packet 701, stores occupant information 501 of occupant 2-1 in RAM 23, and transmits scan request packet 801 to transmitting device 10-1. The transmitting device 10-1 receives the scan request packet 801 and transmits the scan response packet 901 to the receiving device 20-1. The receiving device 20-1 receives the scan response packet 901 and transmits the occupant information 501 of the occupant 2-1 to the supervisory control device 30. The monitoring control device 30 receives the occupant information 501 of the occupant 2-1, and updates the occupant location information based on the received occupant information 501 of the occupant 2-1.

The receiving device 20-1 transmits the transmitting command packet 611 to the transmitting device 10-2 after a period of ΔTa has elapsed from the time ty at which the transmitting command packet 601 was transmitted.

Immediately after receiving the transmission command packet 611, the transmitting device 10-2 cancels the suspension of advertising packet transmission. The transmitting device 10-2 broadcasts an advertisement packet 711. Receiving device 20-1 receives advertising packet 711, stores occupant information 511 of occupant 2-2 in RAM 23, and transmits scan request packet 811 to transmitting device 10-2. The transmitting device 10-2 receives the scan request packet 811 and transmits the scan response packet 911 to the receiving device 20-1. The receiving device 20-1 receives the scan response packet 911 and transmits the occupant information 511 of the occupant 2-2 to the supervisory control device 30. The monitoring control device 30 receives the occupant information 511 of the occupant 2-2, and updates the occupant location information based on the received occupant information 511 of the occupant 2-2.

The receiving device 20-1 transmits the transmitting command packet 621 to the transmitting device 10-3 after a period of ΔTa has elapsed from the time tz at which the transmitting command packet 611 was transmitted.

Immediately after receiving the transmission command packet 621, the transmitting device 10-3 cancels the suspension of advertising packet transmission. The transmitting device 10-3 broadcasts the advertisement packet 721. Receiving device 20-1 receives advertising packet 721, stores occupant information 521 of occupant 2-3 in RAM 23, and transmits scan request packet 821 to transmitting device 10-3. The transmitting device 10-3 receives the scan request packet 821 and transmits the scan response packet 921 to the receiving device 20-1. The receiving device 20-1 receives the scan response packet 921 and transmits the occupant information 521 of the occupant 2-3 to the supervisory control device 30. The monitoring control device 30 receives the occupant information 521 of the occupant 2-3, and updates the occupant location information based on the received occupant information 521 of the occupant 2-3.

(Processing procedure of transmitting device 10)
FIG. 12 is a flowchart showing the processing procedure of the transmitting device 10 according to the second embodiment. The flowchart in FIG. 12 is different from the flowchart in FIG. 7 of the first embodiment in that the flowchart in FIG. 12 includes step S401 and step S402 after step S104 instead of step S105.

In step S401, the communication control unit 111 of the transmitting device 10 determines whether the communication device 14 has received a transmission command packet. If the transmission command packet has been received, the process returns to step S101, and the next advertisement packet is generated and transmitted. If the transmission command packet has not been received, the process advances to step S402.

In step S402, it is determined whether a predetermined time period TS104 or more has elapsed after the processing in step S104. If the predetermined time TS104 or more has not elapsed, the process returns to step S401. If the predetermined time TS104 or more has elapsed, the process returns to step S101. This corresponds to timeout processing when the passenger moves to another area after step S104 and is no longer able to receive the transmission command packet.

(Processing procedure of receiving device 20)
FIG. 13 is a flowchart showing the processing procedure of the receiving device 20 according to the second embodiment. The difference between the flowchart in FIG. 13 and the flowchart in FIG. 8 of the first embodiment is that in the flowchart in FIG. and S502.

In step S501, the communication control unit 215 of the receiving device 20 determines whether a new advertising packet has not been received even after ΔTx has elapsed since the last advertising packet was transmitted. If the time ΔTx has not elapsed, the process returns to step S201. If a new advertisement packet has not been received even after ΔTx has elapsed since the last advertisement packet was transmitted, the process advances to step S502.

In step S502, the communication control unit 215 of the receiving device 20 causes the first communication device 24 to sequentially transmit transmission command packets at time intervals of ΔTa toward each transmitting device 10 that has received the advertisement packet.

Preferably, the time ΔTx and the time ΔTa are longer than the processing time Tex and shorter than the third time divided by the number of all receiving devices 20. Desirably, the sum of the product of the expected maximum number of transmitting devices 10 that a certain receiving device 20 receives within the third time period and the time ΔTa, and the time ΔTx is shorter than the third time period. Therefore, the settings of time ΔTa and time ΔTx may be changed for each receiving device 20.

According to this embodiment, when the transmitting device receives a scan request packet after transmitting an advertisement packet, it stops transmitting the next advertisement packet until it receives a transmission command packet. This allows the receiving device to receive advertisement packets from multiple transmitting devices without missing any.

[Embodiment 3]
(Configuration of transmitting device 10)
The differences between the communication control unit 111 of the third embodiment and the communication control unit 111 of the second embodiment will be explained.

After the communication device 14 receives a transmission command packet with information regarding the order described below, the communication control unit 111 transmits the communication information to the communication device 14 after a predetermined time td3 is multiplied by a coefficient corresponding to the order of its own transmitting device ID. sends the next advertisement packet. The predetermined time td3 is the fourth time.

(Configuration of receiving device 20)
The differences between the first communication device 24 and the communication control unit 215 of the third embodiment from the first communication device 24 and the communication control unit 215 of the second embodiment will be explained.

The first communication device 24 is configured to be able to broadcast the transmission command packet.

The communication control unit 215 provides the first communication device 24 with information regarding the transmission order (hereinafter sometimes abbreviated as ordered), which includes the transmission device IDs of the transmission devices 10 that received the previous transmission command packet after transmission. ) to broadcast the transmission command packet.

(Configuration of supervisory control device 30)
The configuration of the supervisory control device 30 of the third embodiment is similar to the configuration of the supervisory control device 30 of the first and second embodiments.

(Overview of communication sequence)
FIG. 14 is a diagram showing an overview of the communication sequence of the third embodiment. The communication sequence in FIG. 14 differs from the communication sequence in the second embodiment shown in FIG. 11 in the information content of the transmission command packet and the transmission method. In the second embodiment, transmission command packets 601, 602, and 603 are transmitted to transmitting devices 20-1, 20-2, and 20-3, respectively, at time intervals of ΔTa. In Embodiment 3, the receiving device 20-1 broadcasts ordered transmission command packets 651 at time tast, in which the transmitting device IDs of the transmitting devices 10 that were received after transmitting the previous transmission command packet are added in the order of reception. . In the example of FIG. 14, an advertisement packet is received from transmitter 10-1 at time t1, an advertisement packet is received from transmitter 10-2 at time t2, and an advertisement packet is received from transmitter 10-3 at time t3. There is. Therefore, the transmission command packet 651 includes the transmitting device ID of the transmitting device 10-1, the transmitting device ID of the transmitting device 10-2, and the transmitting device ID of the transmitting device 10-3 in this order.

When the transmitting device 10-1 receives the transmission command packet 651, it determines the order of its own device from the information in the transmission command packet 651. In the example of FIG. 14, the order of transmitting device 10-1 is 1. The transmitting device 10-1 transmits the advertisement packet at the time td3, which is the order of the transmitting device 10-1, multiplied by "1" from the time tast when the transmission command packet 651 is received, that is, at the time tast+td3. The stoppage is canceled and the advertisement packet 701 is broadcasted. Receiving device 20-1 receives advertising packet 701, stores occupant information 501 of occupant 2-1 in RAM 23, and transmits scan request packet 801 to transmitting device 10-1. The transmitting device 10-1 receives the scan request packet 801 and transmits the scan response packet 901 to the receiving device 20-1. The receiving device 20-1 receives the scan response packet 901 and transmits the occupant information 501 of the occupant 2-1 to the supervisory control device 30. The monitoring control device 30 receives the occupant information 501 of the occupant 2-1, and updates the occupant location information based on the received occupant information 501 of the occupant 2-1.

When the transmitting device 10-2 receives the transmission command packet 651, it determines the order of its own device from the information in the transmission command packet 651. In the example of FIG. 14, the order of transmitting device 10-2 is 2. The transmitting device 10-2 transmits the advertising packet at a predetermined time td3 multiplied by "2", which is the order of the transmitting device 10-2, from the time tast when it receives the transmission command packet 651, that is, at the time tast+2×td3. The transmission stop is canceled and the advertisement packet 711 is broadcasted. Receiving device 20-1 receives advertising packet 711, stores occupant information 511 of occupant 2-2 in RAM 23, and transmits scan request packet 811 to transmitting device 10-2. The transmitting device 10-2 receives the scan request packet 811 and transmits the scan response packet 911 to the receiving device 20-1. The receiving device 20-1 receives the scan response packet 911 and transmits the occupant information 511 of the occupant 2-2 to the supervisory control device 30. The monitoring control device 30 receives the occupant information 511 of the occupant 2-2, and updates the occupant location information based on the received occupant information 511 of the occupant 2-2.

When the transmitting device 10-3 receives the transmission command packet 651, it determines the order of its own device from the information in the transmission command packet 651. In the example of FIG. 14, the order of the transmitting device 10-3 is 3. The transmitting device 10-2 transmits the advertising packet at the predetermined time td3 multiplied by "2", which is the order of the transmitting device 10-2, from the time tast when it receives the transmission command packet 651, that is, at the time tast+3×td3. The transmission stop is canceled and the advertisement packet 721 is broadcasted. Receiving device 20-1 receives advertising packet 721, stores occupant information 521 of occupant 2-3 in RAM 23, and transmits scan request packet 821 to transmitting device 10-3. The transmitting device 10-3 receives the scan request packet 821 and transmits the scan response packet 921 to the receiving device 20-1. The receiving device 20-1 receives the scan response packet 921 and transmits the occupant information 521 of the occupant 2-3 to the supervisory control device 30. The monitoring control device 30 receives the occupant information 521 of the occupant 2-3, and updates the occupant location information based on the received occupant information 521 of the occupant 2-3.

(Processing procedure of transmitting device 10)
FIG. 15 is a flowchart showing the processing procedure of the transmitting device 10 according to the third embodiment. The flowchart in FIG. 15 is different from the flowchart in FIG. 12 of the second embodiment in that the flowchart in FIG. 15 further includes step S601 and step 602 after step S401.

In step 601, the communication control unit 111 of the transmitting device 10 determines the order xm of the transmitting device ID, which is the own device, from the transmission command packet. Next, in step 602, the process waits for the time equal to the time Td3 multiplied by the order xm (ie, Td3×xm) to elapse. After that, the process returns to step S101, and the next advertisement packet is generated and transmitted.

(Processing procedure of receiving device 20)
FIG. 16 is a flowchart showing the processing procedure of the receiving device 20 according to the third embodiment. The flowchart in FIG. 16 is different from the flowchart in FIG. 13 of the second embodiment in that the flowchart in FIG. 16 includes step S701 instead of step S502 after YES in step S501.

In step S701, the communication control unit 215 of the receiving device 20 causes the first communication device 24 to broadcast ordered transmission command packets to which the transmitting device IDs of the received transmitting devices 10 are added in the order of reception.

Preferably, time Td3 is longer than processing time Tex. Also, instead of setting the waiting time in step 602 as the time Td3 multiplied by the order xm, the time Td3 is multiplied by the number obtained by subtracting "1" from the order xm (that is, Td3 x (xm-1)). ). That is, the waiting time may be the time obtained by multiplying the time Td3 by an integer value greater than or equal to zero corresponding to the order xm.

According to this embodiment, similarly to Embodiment 2, when the transmitting device receives a scan request packet after transmitting an advertisement packet, it stops transmitting the next advertisement packet until it receives a transmission command packet. do. This allows the receiving device to receive advertisement packets from multiple transmitting devices without missing any.

[Embodiment 4]
(Configuration of transmitting device 10)
The configuration of transmitting device 10 according to the fourth embodiment is similar to the configuration of transmitting device 10 according to the second embodiment.

(Configuration of receiving device 20)
The differences between the second communication device 25 and the communication control unit 215 of the fourth embodiment and the first communication device 24 and the communication control unit 215 of the second embodiment will be explained.

The second communication device 25 is configured to be able to receive a detection completion notification indicating that the total number of detected transmitting devices has reached a specified value.

The communication control unit 215 causes the first communication device 24 to broadcast a transmission command packet when the second communication device 25 receives the detection completion notification.

(Configuration of supervisory control device 30)
The differences between the communication device 34, the communication control unit 313, and the occupant management unit 311 of the fourth embodiment from the communication device 34, the communication control unit 313, and the occupant management unit 311 of the second embodiment will be explained.

The occupant management unit 311 determines whether the total number of transmitting devices detected within a predetermined period of time has reached a specified value, based on the occupant management information updated based on the received occupant information. Here, the predetermined time can be set to 2 [sec], which is the same as the update interval for displaying the occupant location information. Alternatively, the occupant management unit 311 may determine whether the total number of transmitting devices detected after the communication system is started reaches a predetermined value.

The communication device 34 is configured to be able to transmit a detection completion notification indicating that the total number of transmitting devices detected within a predetermined period of time has reached a specified value.

The communication control unit 313 causes the communication device 24 to transmit a detection completion notification when the total number of transmitting devices detected within a predetermined period of time reaches a specified value.

(Overview of communication sequence)
FIG. 17 is a diagram showing an overview of the communication sequence of the fourth embodiment. The communication sequence of FIG. 17 differs from the communication sequence of the second embodiment of FIG. 11 in the conditions necessary for transmitting the transmission command packet.

In the second embodiment, the receiving device 20-1 transmits when the condition that no new advertising packet is received even after the time ΔTx has elapsed since the time tx when the last advertising packet 720 was received is satisfied. Command packet 601 was sent.

In the fourth embodiment, the transmission command packet 601 is transmitted as follows.

The supervisory control device 30 receives occupant information 401 to 405 not only from the receiving device 20-1 but also from other receiving devices, and updates the occupant location information. The monitoring control device 30 calculates the total number of transmitting devices detected in all areas based on the occupant information 401 to 405. The monitoring control device 30 transmits a detection completion notification 301 when the total number of transmitting devices detected in all areas reaches a specified value.

The receiving device 20-1 transmits the transmission command packet 601 when the condition of receiving the detection completion notification 301 from the supervisory control device 30 is satisfied. The subsequent operation is the same as in the second embodiment, so the description will not be repeated.

(Processing procedure of transmitting device 10)
The processing procedure of the transmitting device 10 of the fourth embodiment is similar to the flowchart of FIG. 12 of the second embodiment, so the description will not be repeated.

(Processing procedure of receiving device 20)
FIG. 18 is a flowchart showing the processing procedure of the receiving device 20 according to the fourth embodiment. The difference between the flowchart in FIG. 18 and the flowchart in FIG. 13 of the second embodiment is that the flowchart in FIG. After S205, instead of returning to step S201, the process moves to step S801, and if "YES" in step S801, the process moves to step S502.

In step S801, the communication control unit 215 of the receiving device 20 determines whether the second communication device 25 has received the detection completion notification 301 from the monitoring control device 30. When the detection completion notification 301 is received, the process advances to step S502. If the detection completion notification 301 has not been received, the process returns to step S201.

(Processing procedure of supervisory control device 30)
FIG. 19 is a flowchart showing the processing procedure of the supervisory control device 30 according to the fourth embodiment. The flowchart in FIG. 19 is different from the flowchart in FIG. 9 of the first embodiment in that the flowchart in FIG. 19 further includes steps S901 and S902.

In step S901, the occupant management unit 311 of the monitoring and control device 30 updates the display of the previous occupant location information in all areas based on the occupant location information, and then updates the display of the next occupant location information. It is determined whether the total number of transmitting devices detected so far has reached a specified value. If the total number of transmitting devices detected in all areas reaches the specified value, the process advances to step S902.

In step S902, the occupant management unit 311 of the supervisory control device 30 causes the second communication device 25 to transmit a detection completion notification to all receiving devices 20.

According to this embodiment, similarly to Embodiment 2, when the transmitting device receives a scan request packet after transmitting an advertisement packet, it stops transmitting the next advertisement packet until it receives a transmission command packet. do. This allows the receiving device to receive advertisement packets from multiple transmitting devices without missing any.

[Embodiment 5]
(Configuration of transmitting device 10)
The configuration of transmitting device 10 according to the fifth embodiment is similar to the configuration of transmitting device 10 according to the third embodiment.

(Configuration of receiving device 20)
The differences between the second communication device 25 and the communication control unit 215 of the fifth embodiment and the first communication device 24 and the communication control unit 215 of the third embodiment will be explained.

The second communication device 25 is configured to be able to receive a detection completion notification indicating that the total number of detected transmitting devices has reached a specified value.

The communication control unit 215 causes the first communication device 24 to broadcast a transmission command packet when the second communication device 25 receives the detection completion notification.

(Configuration of supervisory control device 30)
The configuration of the supervisory control device 30 of the fifth embodiment is similar to the configuration of the supervisory control device 30 of the fourth embodiment.

(Overview of communication sequence)
FIG. 20 is a diagram showing an overview of the communication sequence of the fifth embodiment. The communication sequence of FIG. 20 differs from the communication sequence of the third embodiment of FIG. 14 in the conditions necessary for transmitting the transmission command packet.

In the third embodiment, the receiving device 20-1 transmits when the condition that no new advertising packet is received even after the time ΔTx has elapsed since the time tx when the last advertising packet 720 was received is satisfied. A command packet 651 was broadcast.

In the fifth embodiment, the transmission command packet 651 is broadcast-transmitted as follows.

The supervisory control device 30 receives occupant information 401 to 405 not only from the receiving device 20-1 but also from other receiving devices, and updates occupant location information. The monitoring control device 30 calculates the total number of transmitting devices detected in all areas based on the occupant information 401 to 405. The monitoring control device 30 transmits a detection completion notification 301 when the total number of transmitting devices detected in all areas reaches a specified value.

The receiving device 20-1 broadcasts the transmission command packet 651 when the condition that the detection completion notification 301 is received from the supervisory control device 30 is satisfied. The subsequent operation is similar to that in the third embodiment, so the description will not be repeated.

(Processing procedure of transmitting device 10)
The processing procedure of the transmitting device 10 according to the fifth embodiment is similar to the flowchart of FIG. 15 according to the third embodiment, so the explanation will not be repeated.

(Processing procedure of receiving device 20)
FIG. 21 is a flowchart showing the processing procedure of the receiving device 20 according to the fifth embodiment. The difference between the flowchart in FIG. 21 and the flowchart in FIG. 16 of the third embodiment is that the flowchart in FIG. This is the point where the process moves to step S801 after S205. If the determination in step S801 is "NO", the process returns to step S201, and if the determination is "YES", the process proceeds to step S701.

In step S801, the communication control unit 215 of the receiving device 20 determines whether the second communication device 25 has received the detection completion notification 301 from the monitoring control device 30. When the detection completion notification 301 is received, the process advances to step S701.

According to this embodiment, similarly to Embodiment 2, when the transmitting device receives a scan request packet after transmitting an advertisement packet, it stops transmitting the next advertisement packet until it receives a transmission command packet. do. This allows the receiving device to receive advertisement packets from multiple transmitting devices without missing any.

In the communication system described above, an example has been described in which a communication protocol according to the BLE standard is used for communication between the transmitting device 10 and the receiving device 20, but other communication protocols may be used instead of the communication protocol according to the BLE standard. It's okay to be hit.

It should be considered that the embodiments disclosed herein are illustrative in all respects and are not restrictive. The scope of the present invention is indicated by the claims rather than the above description, and it is intended that all changes within the meaning and range equivalent to the claims are included.

1 Communication system, 2 Crew member, 10 Transmission device, 11, 21, 31 CPU, 12, 22, 32 Storage device, 13, 23, 33 RAM, 14, 34 Communication device, 15 Biosensor, 16 Battery, 20 Receiving device, 24 first communication device, 25 second communication device, 30 monitoring control device, 35 communication interface, 36 display, 111, 215, 313 communication control section, 113 generation section, 216 occupant information generation section, 311 occupant management section.

Claims (10)

a communication device configured to be able to transmit an advertisement packet and configured to be able to receive a scan request packet transmitted as a response to the advertisement packet;
When the communication device receives the scan request packet after broadcasting the advertisement packet, the communication device receives the next advertisement packet until a first time period elapses from the time the communication device receives the scan request packet. a communication control unit that stops transmission;
Equipped with
When the communication device does not receive the scan request packet after transmitting the advertisement packet, the communication control unit transmits the transmitted advertisement to the communication device after a second time period that is shorter than the first time period. A transmitting device that causes the packet to be broadcast again . a communication device configured to be able to transmit an advertisement packet, and configured to be able to receive a scan request packet transmitted as a response to the advertisement packet, and a transmission command packet representing a transmission command for the advertisement packet;
When the communication device receives the scan request packet after broadcasting the advertisement packet, the communication device causes the communication device to stop transmitting the next advertisement packet until the communication device receives the transmission command packet. a control unit;
Equipped with
The transmission command packet is transmitted from the receiving device when a new advertising packet is not received even after a certain period of time has elapsed since the receiving device received the last advertising packet. The communication device receives the transmission command packet addressed to the transmitting device,
The transmitting device according to claim 2 , wherein the communication control unit causes the communication device to transmit the next advertisement packet immediately after the communication device receives the transmission command packet. The communication device receives the transmission command packet that is broadcast and includes information regarding the transmission order,
The communication control unit transmits the next advertisement packet to the communication device after a time equal to a fourth time multiplied by a value based on the transmission order information after the communication device receives the transmission command packet. 3. The transmitting device according to claim 2 . A communication system comprising a plurality of transmitting devices according to claim 1 and a plurality of receiving devices,
The receiving device includes:
a first communication device configured to be able to receive the advertisement packet and configured to be able to transmit the scan request packet;
A communication system comprising: a communication control unit that causes the first communication device to transmit the scan request packet when the first communication device receives the advertisement packet. The communication system further includes a monitoring control device,
The receiving device further includes:
a second communication device connected to the supervisory control device and configured to be able to transmit information identifying a transmitting device as a source of the advertising packet;
The communication control unit of the receiving device causes the second communication device to transmit information identifying a transmitting device as a source of the received advertisement packet,
The supervisory control device includes:
a communication device connected to the plurality of receiving devices and configured to be able to receive information identifying a transmitting device that is a source of the advertising packet;
display and
a management unit that displays, on the display, information representing a transmitting device whose location has been detected within the third time period, based on information specifying the transmitting device, at every third time period that is longer than the first time period; The communication system according to claim 5 , comprising: A communication system comprising a plurality of transmitting devices according to claim 2 and a plurality of receiving devices,
The receiving device includes:
a first communication device configured to be able to receive the advertisement packet, and configured to be able to transmit the scan request packet and the transmission command packet;
When the first communication device receives the advertisement packet, the first communication device is caused to transmit the scan request packet, and even if a certain period of time has elapsed since the first communication device received the last advertisement packet. , a communication control unit that causes the first communication device to transmit the transmission command packet when a new advertisement packet is not received. A communication system comprising a plurality of transmitting devices according to claim 2 , a plurality of receiving devices, and a monitoring control device,
The receiving device includes:
a first communication device configured to be able to receive the advertisement packet, and configured to be able to transmit the scan request packet and the transmission command packet;
Connected to the supervisory control device, configured to be able to transmit information identifying the transmitting device that is the source of the advertisement packet, and capable of receiving a detection completion notification indicating that the total number of detected transmitting devices has reached a specified value. a second communication device configured;
a communication control unit that causes the first communication device to transmit the scan request packet when the first communication device receives the advertisement packet,
The communication control unit causes the second communication device to transmit information identifying a transmitting device as a source of the received advertisement packet,
The communication control unit causes the first communication device to transmit the transmission command packet when the second communication device receives the detection completion notification,
The supervisory control device includes:
a communication device connected to the receiving device, configured to be able to receive information identifying a transmitting device as a source of the advertisement packet, and configured to be able to transmit the detection completion notification;
A communication system comprising: a management unit that determines whether the total number of detected transmitting devices has reached a specified value based on information specifying the transmitting devices. 9. The communication system according to claim 7 , wherein the communication control unit of the receiving device causes the first communication device of the receiving device to sequentially transmit the transmission command packet to each transmitting device. The first communication device of the receiving device is configured to be able to transmit the transmission command packet,
9. The communication system according to claim 7 , wherein the communication control unit of the receiving device causes the first communication device of the receiving device to broadcast the transmission command packet.

Images