JP2024145951A - Communication device, communication method, and program - Google Patents

Abstract

A technology is provided that suppresses an increase in the waiting time until authentication is completed.
[Solution] The authentication device 200 includes a first communication unit 210 and a second communication unit 220. The first communication unit 210 communicates using a first wireless communication method. The second communication unit 220 communicates using a second wireless communication method different from the first wireless communication method, and is capable of simultaneously connecting to the same number of terminal devices as the first communication unit 210 or fewer terminal devices. The second communication unit 220 is capable of communicating with any of the terminal devices based on terminal information received from the terminal device through communication by the first communication unit 210.
[Selected Figure] Figure 4

Description

This disclosure relates to communication technology, and in particular to a communication device, a communication method, and a program for communicating with a terminal device carried by a person.

When two wireless communication devices perform authentication, it is desirable not to impair user convenience. Therefore, the device to be communicated with is authenticated by communication over a first communication distance, and then communication with the authenticated device to be communicated with is performed over a second communication distance that is shorter than the first communication distance (see, for example, Patent Document 1).

WO 16/009738

Authentication between two wireless communication devices is used for entrance and exit management, such as entering or exiting a room. For example, a gate with an authentication device is installed at the entrance to a room, and a user carries a terminal device. When a user passes through the gate to enter or exit a room, wireless communication is performed between the terminal device and the authentication device using UWB (Ultra Wide Band). The authentication device then measures the distance to the terminal device and then authenticates it. Since distance measurement using UWB requires parameter communication for distance measurement to be performed in advance, it takes more than two seconds per device until distance measurement is possible, even when authentication is accepted. Therefore, when there are multiple users attempting to pass through the gate, the waiting time until authentication is completed increases, which may hinder convenience.

This disclosure has been made in light of these circumstances, and its purpose is to provide technology that reduces the increase in waiting time until authentication is completed.

In order to solve the above problem, a communication device according to one aspect of the present disclosure includes a first communication unit that communicates using a first wireless communication method, and a second communication unit that communicates using a second wireless communication method different from the first wireless communication method and that can simultaneously connect to the same number of terminal devices as the first communication unit or fewer terminal devices. The second communication unit can communicate with any of the terminal devices based on terminal information received from the terminal device through communication by the first communication unit.

Another aspect of the present disclosure is a communication method. This method includes a step of communicating using a first wireless communication method and a step of communicating using a second wireless communication method different from the first wireless communication method. In the second wireless communication method, the number of terminal devices that can be simultaneously connected is the same as or smaller than the number of terminal devices that can be simultaneously connected using the first wireless communication method, and in the step of communicating using the second wireless communication method, communication with any of the terminal devices is possible based on terminal information received from the terminal device through communication using the first wireless communication method.

In addition, any combination of the above components, and conversions of the expressions of this disclosure between methods, devices, systems, recording media, computer programs, etc., are also valid aspects of this disclosure.

This disclosure makes it possible to reduce the increase in waiting time until authentication is completed.

1 is a diagram showing a configuration of an entrance/exit management system according to an embodiment of the present invention; FIG. 2 is a sequence diagram showing a procedure of a process that is a prerequisite in the entrance/exit management system of FIG. 1 . 3A and 3B are sequence diagrams showing the procedure of a process in a comparative example of the entrance/exit management system of FIG. FIG. 2 is a diagram showing a configuration of an authentication device in FIG. 1; 2 is a sequence diagram showing a processing procedure in the entrance/exit management system of FIG. 1;

Before describing the present disclosure in detail, an overview will be provided. The embodiment relates to an entrance/exit management system that manages users' entry into a specified area in a facility or their exit from that area. In the entrance/exit management system, an authentication device provided at a gate exchanges parameters for wireless communication by a second wireless communication method by performing wireless communication with a terminal device carried by a user using a first wireless communication method. The authentication device then performs wireless communication with the terminal device using the second wireless communication method to measure the distance to the terminal device, and then authenticates the terminal device.

In such an access control system, if there are more terminal devices than the number of simultaneous connections using the second wireless communication method, some terminal devices will be unable to perform wireless communication with the authentication device. When the terminal device is able to communicate with the authentication device using the second wireless communication method, it will start communicating with the authentication device using the first wireless communication method, which will result in waiting times for parameter exchange, distance measurement, and authentication. Therefore, even when there are a large number of terminal devices, it is desirable to suppress increases in the waiting time until authentication is completed.

The authentication device according to this embodiment executes wireless communication using the first wireless communication method with a terminal device that cannot execute wireless communication using the second wireless communication method, thereby completing parameter exchange in advance. Furthermore, when wireless communication using the second wireless communication method becomes possible with the terminal device, the authentication device immediately executes wireless communication using the second wireless communication method with the terminal device using the parameters that have already been exchanged.

Figure 1 shows the configuration of an entrance/exit management system 1000. The entrance/exit management system 1000 includes a first terminal device 100a to a sixth terminal device 100f, collectively referred to as terminal devices 100, and an authentication device 200. The first terminal device 100a to the sixth terminal device 100f are carried by the first user 110a to the sixth user 110f, respectively. The first user 110a to the sixth user 110f are collectively referred to as users 110. The number of terminal devices 100 and users 110 is not limited to "6".

The terminal device 100 is a portable wireless communication device such as a smartphone. The terminal device 100 is capable of performing wireless communication using at least two wireless communication methods. For example, the first wireless communication method (hereinafter referred to as the "first wireless communication method") is Bluetooth Low Energy (registered trademark) (BLE), and the second wireless communication method (hereinafter referred to as the "second wireless communication method") is UWB. The first wireless communication method or the second wireless communication method is not limited to these.

A gate 130 is installed at a specific area, for example, at the entrance of a room. When entering or leaving a room, a user 110 passes through the gate 130 while carrying a terminal device 100. At that time, an authentication device 200 fixed to the gate 130 exchanges parameters with the terminal device 100 by performing wireless communication with the terminal device 100 in a first wireless communication method. After that, the authentication device 200 uses the exchanged parameters to perform wireless communication with the terminal device 100 in a second wireless communication method, thereby performing distance measurement of the terminal device 100 in the second wireless communication method. The authentication device 200 performs authentication processing of the terminal device 100 based on the result of the distance measurement. The entry and exit of the user 110 carrying the terminal device 100 is managed based on the result of the authentication processing. A door may be used instead of the gate 130, and the authentication device 200 may perform unlocking or opening the door if authentication is successful.

The authentication device 200 may not be configured as an integrated device, but may be configured from multiple devices. For example, among the authentication device 200, a communication device may be provided with a wireless communication function for executing the first wireless communication method and the second wireless communication method, and the authentication device 200 may not be provided with a wireless communication function. Such a combination of a communication device and an authentication device 200, or one authentication device 200, may be collectively referred to as an authentication system.

Figure 2 is a sequence diagram showing the procedure of the process that is the premise in the entrance/exit management system 1000. In the following, it is assumed that the first wireless communication method is BLE and the second wireless communication method is UWB. The authentication device 200 transmits an advertisement in BLE (S10). When the terminal device 100 receives the advertisement, it transmits a response signal (S12). When the authentication device 200 receives the response signal, the authentication device 200 and the terminal device 100 execute terminal authentication in BLE (hereinafter referred to as "first terminal authentication") and connection processing in BLE (S14). Here, after the terminal device 100 transmits the advertisement in BLE, the authentication device 200 and the terminal device 100 may execute the first terminal authentication in BLE and connection processing in BLE. In other words, either the terminal device 100 or the authentication device 200 may be the advertiser.

The authentication device 200 and the terminal device 100 exchange parameters (S16). The exchanged parameters are used to communicate by UWB. BLE is used for the processing up to this point. The authentication device 200 and the terminal device 100 set parameters (S18). The authentication device 200 and the terminal device 100 perform terminal authentication in UWB (hereinafter referred to as "second terminal authentication") (S20), and then perform ranging by UWB (S22). The authentication device 200 and the terminal device 100 perform authentication using the results of ranging (S24). As shown in the figure, the processing before ranging by UWB takes more than 2 seconds.

In the following, the processes from step 10 to step 16 in FIG. 2, i.e., the processes for communicating using BLE, will be referred to as "first process", and the processes from step 18 to step 24, i.e., the processes for communicating using UWB, will be referred to as "second process". In other words, the first process is executed before the second process is executed. FIGS. 3(a)-(b) are sequence diagrams showing the procedure of the processes in the comparison target of the entrance/exit management system 1000. The comparison targets include a first terminal device 10a, a second terminal device 10b, and an authentication device 20, collectively referred to as terminal device 10. The first terminal device 10a, the second terminal device 10b, and the authentication device 20 correspond to the first terminal device 100a, the second terminal device 100b, and the authentication device 200 in FIG. 1. The authentication device 20 also includes a first communication unit 22 and a second communication unit 24, where the first communication unit 22 is capable of communicating using a first wireless communication method (BLE) and the second communication unit 24 is capable of communicating using a second wireless communication method (UWB).

Figure 3(a) shows the process when the number of terminal devices 10 is "1", that is, when only the first terminal device 10a is present. A first process is executed between the first terminal device 10a and the first communication unit 22 of the authentication device 20 (S100). Following this, a second process is executed between the first terminal device 10a and the second communication unit 24 of the authentication device 20 (S102).

3(b) shows the process when the number of terminal devices 10 is "2", that is, when the first terminal device 10a and the second terminal device 10b exist. Here, the number of simultaneous connections of the first wireless communication method and the number of simultaneous connections of the second wireless communication method are "1", which is less than the number of terminal devices 10. The first process is executed between the first terminal device 10a and the first communication unit 22 of the authentication device 20 (S110). Following this, the second process is executed between the first terminal device 10a and the second communication unit 24 of the authentication device 20 (S112). After that, the first process is executed between the second terminal device 10b and the first communication unit 22 of the authentication device 20 (S114). Following this, the second process is executed between the second terminal device 10b and the second communication unit 24 of the authentication device 20 (S116). In other words, if the number of simultaneous connections for the first wireless communication method or the number of simultaneous connections for the second wireless communication method is less than the number of terminal devices 10, processing for the terminal devices 10 is performed in order.

In the entrance/exit management system 1000 of FIG. 1, when the number of simultaneous connections of the second wireless communication method (UWB) is "3", distance measurement for the three terminal devices 100 is performed immediately, but distance measurement for the three terminal devices 100 is performed after distance measurement for the previous three terminal devices 100 is completed. In this case, if the processing procedure is as shown in FIG. 3(b), the first wireless communication method (BLE) executed before communication by the second wireless communication method (UWB) takes more than two seconds, so distance measurement does not start immediately.

Figure 4 shows the configuration of the authentication device 200. The authentication device 200 includes a first communication unit 210, a second communication unit 220, a control unit 230, and a storage unit 240. The control unit 230 includes a first terminal authentication unit 250, a second terminal authentication unit 252, a selection unit 254, a measurement unit 256, and an authentication unit 258. The first communication unit 210 can communicate with a plurality of terminal devices 100 using a first wireless communication method. As described above, an example of the first wireless communication method is BLE. The first communication unit 210 transmits an advertisement. In addition, when the first communication unit 210 receives a response signal from each terminal device 100 that has received the advertisement, the first communication unit 210 measures the reception strength of the response signal and outputs the response signal to the control unit 230. As described above, the first communication unit 210 may receive an advertisement from each terminal device 100.

The first communication unit 210 connects to the terminal device 100 via BLE by transmitting a connection request to the terminal device 100. During this connection process, the first terminal authentication unit 250 executes first terminal authentication for the terminal device 100 based on prior information included in a signal received from the terminal device 100. The prior information is, for example, identification information and credential information in BLE. The signal including the prior information may be a response signal, or a signal received during a connection via BLE. A known technique may be used for the first terminal authentication, and therefore a description thereof will be omitted here.

After connecting to the terminal device 100, the first communication unit 210 exchanges parameters with the terminal device 100. As described above, the exchanged parameters are used for communication by UWB. The exchanged parameters include terminal information. The terminal information includes a MAC (Media Access Control) address set in the terminal device 100 and identification information in UWB of the terminal device 100. The first communication unit 210 outputs the parameters to the control unit 230.

The number of terminal devices 100 that can be simultaneously connected to the first communication unit 210 is X. The first communication unit 210 communicates with a number of terminal devices 100 that is equal to or less than X and is greater than Y (Y<X), and the first communication unit 210 and the control unit 230 execute the first process for those terminal devices 100 in parallel at the same time.

The second communication unit 220 can communicate with the terminal device 100 by a second wireless communication method different from the first wireless communication method. As described above, an example of the second wireless communication method is UWB. The number of terminal devices 100 that can be simultaneously connected to the second communication unit 220 is equal to or less than the number of terminal devices 100 that can be simultaneously connected to the first communication unit 210. Here, the number of terminal devices 100 that can be simultaneously connected to the second communication unit 220 is Y (X>Y). In such a situation, if communication is performed between the first communication unit 210 and more than Y terminal devices 100, the second communication unit 220 cannot simultaneously connect to all of those terminal devices 100.

The second communication unit 220 therefore executes the second process in parallel by communicating with Y or fewer terminal devices 100, and keeps the remaining terminal devices 100 on standby after the first process is completed. The selection unit 254 of the control unit 230 determines the terminal devices 100 to be preferentially connected to the second communication unit 220 in a priority order based on a predetermined condition. One example of the predetermined condition is that the reception strength of the response signal received by the first communication unit 210 from the terminal device 100 is high. In this case, the control unit 230 selects the terminal device 100 in order of the strongest reception strength. This corresponds to preferentially selecting the terminal devices 100 that are close to the authentication device 200.

Parameters are set in the second communication unit 220 by the control unit 230. After the parameters are set, in order to start the second communication, the second communication unit 220 starts communication with the terminal device 100 by UWB based on a trigger from the terminal device 100 or the authentication device 200. The second communication unit 220 receives a signal from the terminal device 100 selected by the selection unit 254. The second communication unit 220 outputs the received signal to the control unit 230.

The second terminal authentication unit 252 of the control unit 230 executes second terminal authentication for the terminal device 100 based on the signal received from the second communication unit 220 and the terminal information. As described above, an example of terminal information is the MAC address set in the terminal device 100 and the identification information of the terminal device 100 in UWB. The second communication unit 220 connects via UWB to the terminal device 100 for which the second terminal authentication has been successful in the second terminal authentication unit 252. In other words, the second communication unit 220 can communicate with the terminal device 100 based on the terminal information received from the terminal device 100 through communication by the first communication unit 210.

The measurement unit 256 performs distance measurement for the terminal device 100 in UWB communication with the terminal device 100 in the second communication unit 220. Any known technology may be used for distance measurement, for example, distance estimation based on the time of flight (ToF) of radio waves, or angle estimation based on the arrival time difference of radio waves to two or more antennas of the second communication unit 220. The authentication unit 258 accepts the results of the distance measurement in the measurement unit 256. The authentication unit 258 authenticates the terminal device 100 based on the results of the distance measurement. For example, the authentication unit 258 authenticates the terminal device 100 if the position of the terminal device 100 measured is within a predetermined range.

If authentication of the terminal device 100 is successful, the control unit 230 stores the entry and exit status of the user 110 carrying the terminal device 100 in the memory unit 240. In addition, if the gate 130 is a door, the control unit 230 may unlock or open the door to allow the user 110 carrying the terminal device 100 that has been successfully authenticated to pass through.

After the communication between the second communication unit 220 and the terminal device 100 is completed, the selection unit 254 selects, from among the waiting terminal devices 100, the terminal device 100 that should next execute the second process. This selection uses the above-mentioned predetermined condition, i.e., the reception strength. The second communication unit 220 is set with parameters for the terminal device 100 selected by the selection unit 254. The second communication unit 220 executes the second process in the same manner as before.

So far, reception strength has been used as the predetermined condition. The predetermined condition is not limited to this. The predetermined condition may be at least one of the timing of the start of connection between the first communication unit 210 and the terminal device 100 being early, or the duration of the connection of the terminal device 100 being long. This corresponds to preferentially selecting the terminal device 100 that starts the connection early. The predetermined condition may also be to follow a predefined priority of the terminal device 100. The storage unit 240 stores the priority of each registered terminal device 100. The selection unit 254 preferentially selects the terminal device 100 with the high priority.

Up to now, after the communication between the second communication unit 220 and the terminal device 100 is terminated, the selection unit 254 selects another terminal device 100 that should next communicate with the second communication unit 220. The selection unit 254 may select another terminal device 100 that should next communicate with the second communication unit 220 before the communication between the second communication unit 220 and the terminal device 100 is terminated. When another terminal device 100 is waiting for the second communication unit 220 to start communication, when a predetermined period has elapsed since the other terminal device 100 started connecting to the first communication unit 210, the selection unit 254 instructs the second communication unit 220 to switch communication. When the second communication unit 220 receives the instruction from the selection unit 254, it disconnects communication with the terminal device 100 that started communication first and starts communication with the other terminal device 100.

The subject of the device, system, or method of the present disclosure includes a computer. The computer executes a program to realize the function of the subject of the device, system, or method of the present disclosure. The computer includes a processor that operates according to the program as the main hardware configuration. The type of processor is not important as long as it can realize the function by executing the program. The processor is composed of one or more electronic circuits including a semiconductor integrated circuit (IC) or an LSI (Large Scale Integration). The multiple electronic circuits may be integrated into one chip or may be provided on multiple chips. The multiple chips may be integrated into one device or may be provided on multiple devices. The program is recorded on a non-transitory recording medium such as a computer-readable ROM, optical disk, or hard disk drive. The program may be stored in the recording medium in advance, or may be supplied to the recording medium via a wide area communication network including the Internet.

The operation of the entrance/exit management system 1000 configured as above will be described. FIG. 5 is a sequence diagram showing the procedure of processing in the entrance/exit management system 1000. This shows the processing when the number of terminal devices 100 is "2", that is, when a first terminal device 100a and a second terminal device 100b exist. Here, it is assumed that the number of simultaneous connections of the first wireless communication method is "2" or more, and the number of simultaneous connections of the second wireless communication method is "1". A first process is executed between the first terminal device 100a and the first communication unit 210 (socket 1) of the authentication device 200 (S200). At the same time, a first process is executed between the second terminal device 100b and the first communication unit 210 (socket 2) of the authentication device 200 (S202).

Following the first process between the first terminal device 100a and the first communication unit 210 (socket 1) of the authentication device 200, a second process is executed between the first terminal device 100a and the second communication unit 220 of the authentication device 200 (S204). On the other hand, even if the first process between the second terminal device 100b and the first communication unit 210 (socket 2) of the authentication device 200 is completed, the second terminal device 100b waits without executing the second communication. When the second process between the first terminal device 100a and the second communication unit 220 of the authentication device 200 is completed, a second process is executed between the second terminal device 100b and the second communication unit 220 of the authentication device 200 (S206)

According to this embodiment, when communication by the second wireless communication method is executed following communication by the first wireless communication method, the number of terminal devices 100 that can be simultaneously connected by the first wireless communication method is set to be equal to or greater than the number of terminal devices 100 that can be simultaneously connected by the second wireless communication method, so that communication by the first wireless communication method can be executed in advance. Furthermore, since communication by the first wireless communication method is executed in advance, parameter exchange can be executed in advance. Furthermore, since parameter exchange is executed in advance, an increase in the waiting time until authentication is completed can be suppressed.

In addition, since the terminal device 100 is terminal-authenticated in the first wireless communication method, the first wireless communication method can be executed safely. Furthermore, since the advance information includes credential information, the credential information can be used for terminal authentication. Furthermore, since the terminal device 100 is terminal-authenticated in the second wireless communication method, the second wireless communication method can be executed safely.

In addition, since a connection is made to one of the terminal devices 100 in a priority order based on predetermined conditions, communication with a specific terminal device 100 can be prioritized. Since a terminal device 100 is selected based on reception strength, communication with a terminal device 100 located near the authentication device 200 can be prioritized. Since a terminal device 100 is selected based on at least one of the timing of connection start and the duration of connection, communication with the terminal devices 100 can be performed in the order of connection. Since a terminal device 100 is selected based on a predetermined priority, a desired terminal device 100 can be selected.

In addition, when there are a large number of terminal devices 100 that must communicate with the authentication device 200, only communication using the first wireless communication method is completed, and communication using the second wireless communication method is performed once communication is possible, thereby preventing an increase in waiting time.In addition, when the waiting time until communication using the second wireless communication method is performed is long, other terminal devices 100 that are already communicating using the second wireless communication method are disconnected before communication using the second wireless communication method is started, thereby preventing an increase in waiting time.

An outline of one aspect of the present disclosure is as follows.
(Item 1)
A first communication unit (210) that communicates by a first wireless communication method;
and a second communication unit (220) that communicates using a second wireless communication method different from the first wireless communication method and that has the same or a smaller number of terminal devices (100) that can be simultaneously connected than the first communication unit (210), wherein the second communication unit (220) is a communication device (200) that can communicate with any of the terminal devices (100) based on terminal information received from the terminal device (100) through communication by the first communication unit (210).

(Item 2)
2. The communication device (200) according to item 1, wherein the terminal information is received from the terminal device (100) after the first communication unit (210) and the terminal device (100) are connected.

(Item 3)
3. The communication device (200) according to item 1 or 2, wherein the terminal information includes a MAC (Media Access Control) address set in the terminal device (100).

(Item 4)
The first communication unit (210) further includes a terminal authentication unit (250) that performs terminal authentication of the terminal device (100) based on advance information received from the terminal device (100),
The communication device (200) according to any one of items 1 to 3, wherein the first communication unit (210) connects to the terminal device (100) that has been terminal-authenticated by the terminal authentication unit (250).

(Item 5)
5. The communication device (200) according to item 4, wherein the advance information includes credential information.

(Item 6)
The terminal authentication unit (252) further includes a terminal authentication unit (252) that performs terminal authentication of the terminal device (100) based on the terminal information,
The communication device (200) according to any one of items 1 to 3, wherein the second communication unit (220) connects to the terminal device (100) that has been terminal-authenticated by the terminal authentication unit (252).

(Item 7)
7. The communication device (200) according to any one of items 1 to 6, wherein the second communication unit (220) connects to any one of the terminal devices (100) in a priority order based on a predetermined condition.

(Item 8)
8. The communication device (200) according to item 7, wherein the predetermined condition includes a reception strength of a signal received by the first communication unit (210) from the terminal device (100).

(Item 9)
8. The communication device (200) according to item 7, wherein the predetermined condition includes at least one of a timing of starting a connection with the first communication unit (210) and a duration of the connection.

(Item 10)
8. The communication device (200) according to item 7, wherein the predetermined condition includes a predefined priority.

(Item 11)
The number of the terminal devices (100) that can be simultaneously connected to the first communication unit (210) is X,
The number of the terminal devices (100) that can be simultaneously connected to the second communication unit (220) is Y (X>Y),
The first communication unit (210) communicates with more than Y terminal devices (100);
When communication is being performed between the first communication unit (210) and the terminal devices (100) that are greater than the Y number, the second communication unit (220) communicates with the terminal devices (100) that are less than or equal to Y number, and puts the remaining terminal devices (100) on standby;
The communication device (200) according to any one of items 1 to 10, wherein the second communication unit (220) starts communication with a waiting terminal device (100) after communication with the terminal device (100) is terminated.

(Item 12)
When one of the terminal devices (100) is referred to as a first terminal device (100) and another of the terminal devices (100) is referred to as a second terminal device (100),
When the first terminal device (100) is waiting for the second communication unit (220) to start communication, when a predetermined period of time has elapsed since the first terminal device (100) started connecting to the first communication unit (210),
The communication device (200) according to any one of items 1 to 11, wherein the second communication unit (220) disconnects communication with the second terminal device (100) that first started communication and starts communication with the first terminal device (100).

(Item 13)
The communication device (200) according to any one of items 1 to 12, wherein the second communication unit (220) starts communication with the terminal device (100) based on a trigger from the terminal device (100) or the communication device (200).

(Item 14)
communicating in a first wireless communication scheme;
communicating by a second wireless communication method different from the first wireless communication method;
In the second wireless communication method, the number of terminal devices (100) that can be simultaneously connected is equal to or smaller than that in the first wireless communication method,
A communication method in which the step of communicating using the second wireless communication method is capable of communicating with any of the terminal devices (100) based on terminal information received from the terminal device (100) through communication using the first wireless communication method.

(Item 15)
communicating in a first wireless communication scheme;
communicating by a second wireless communication method different from the first wireless communication method;
In the second wireless communication method, the number of terminal devices (100) that can be simultaneously connected is equal to or smaller than that in the first wireless communication method,
The step of communicating using the second wireless communication method is a program for causing a computer to execute a process for determining whether communication with any of the terminal devices (100) is possible based on terminal information received from the terminal device (100) via communication using the first wireless communication method.

The present disclosure has been described above based on examples. These examples are merely illustrative, and it will be understood by those skilled in the art that various modifications are possible in the combination of each of the components or each of the processing processes, and that such modifications are also within the scope of the present disclosure.

10 Terminal device, 20 Authentication device, 22 First communication unit, 24 Second communication unit, 100 Terminal device, 110 User, 130 Gate, 200 Authentication device, 210 First communication unit, 220 Second communication unit, 230 Control unit, 240 Storage unit, 250 First terminal authentication unit, 252 Second terminal authentication unit, 254 Selection unit, 256 Measurement unit, 258 Authentication unit, 1000 Entrance/exit management system.

Claims (15)

a first communication unit that communicates by a first wireless communication method;
A communication device comprising: a second communication unit that communicates using a second wireless communication method different from the first wireless communication method and that has the same number of terminal devices as or a smaller number of terminal devices that can be simultaneously connected to the first communication unit, wherein the second communication unit is capable of communicating with any of the terminal devices based on terminal information received from the terminal devices through communication by the first communication unit. The communication device according to claim 1, wherein the terminal information is received from the terminal device after the first communication unit and the terminal device are connected. The communication device according to claim 1, wherein the terminal information includes a MAC (Media Access Control) address set in the terminal device. a terminal authentication unit that performs terminal authentication of the terminal device based on the advance information received from the terminal device by the first communication unit,
The communication device according to claim 1 , wherein the first communication unit is configured to connect to the terminal device that has been terminal-authenticated by the terminal authentication unit. The communication device according to claim 4, wherein the advance information includes credential information. A terminal authentication unit that performs terminal authentication of the terminal device based on the terminal information,
The communication device according to claim 1 , wherein the second communication unit is configured to connect to the terminal device that has been terminal-authenticated by the terminal authentication unit. The communication device according to claim 1, wherein the second communication unit connects to any of the terminal devices in a priority order based on a predetermined condition. The communication device according to claim 7, wherein the predetermined condition includes a reception strength of a signal received by the first communication unit from the terminal device. The communication device according to claim 7, wherein the predetermined condition includes at least one of the timing of initiating a connection with the first communication unit or the duration of the connection. The communication device according to claim 7, wherein the predetermined conditions include a predefined priority. the number of the terminal devices that can be simultaneously connected to the first communication unit is X,
The number of the terminal devices that can be simultaneously connected to the second communication unit is Y (X>Y),
The first communication unit communicates with more than Y terminal devices,
when communication is performed between the first communication unit and the terminal devices that are greater than the Y number, the second communication unit communicates with the Y number or less of the terminal devices and places the remaining terminal devices on standby;
The communication device according to claim 1 , wherein the second communication unit starts communication with the terminal device that is on standby after communication with the terminal device is terminated. When one of the terminal devices is referred to as a first terminal device and another of the terminal devices is referred to as a second terminal device,
When the first terminal device is waiting for the second communication unit to start communication, if a predetermined period of time has elapsed since the first terminal device started connecting to the first communication unit,
The communication device according to claim 1 , wherein the second communication unit disconnects communication with the second terminal device that first started communication, and starts communication with the first terminal device. The communication device according to claim 1, wherein the second communication unit starts communication with the terminal device based on a trigger from the terminal device or the communication device. communicating in a first wireless communication scheme;
communicating by a second wireless communication method different from the first wireless communication method;
the second wireless communication method has the same or a smaller number of terminal devices that can be simultaneously connected than the first wireless communication method;
The step of communicating using the second wireless communication method is a communication method capable of communicating with any of the terminal devices based on terminal information received from the terminal device through communication using the first wireless communication method. communicating in a first wireless communication scheme;
communicating by a second wireless communication method different from the first wireless communication method;
the second wireless communication method has the same or a smaller number of terminal devices that can be simultaneously connected than the first wireless communication method;
The step of communicating using the second wireless communication method is a program for causing a computer to execute a process that determines whether communication with any of the terminal devices is possible based on terminal information received from the terminal device via communication using the first wireless communication method.

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