Communication device

Abstract

An authentication device (100) comprises: a first wireless communication control unit (130) capable of performing first wireless communication simultaneously with N1 (N1 is a positive integer) terminals (200); and a second wireless communication control unit (140) capable of performing second wireless communication simultaneously with, among the terminals (200) that are performing the first wireless communication, N2 (N2 is a positive integer) terminals (200). N2 is smaller than N1.

Description

communication equipment

[0001] The present disclosure relates to a communication device.

[0002] There are known technologies that allow one device to communicate with multiple devices simultaneously. For example, the in-vehicle device disclosed in Patent Document 1 can simultaneously connect to multiple mobile terminals. The in-vehicle device in Patent Document 1 also determines the priority of the mobile terminal communication connection based on the terminal location, and prioritizes the mobile terminal with the higher priority for the communication connection.

[0003] Japanese Patent Application Laid-Open No. 2021-136457

[0004] In the above technology, when connecting to multiple terminals simultaneously, the priority is determined based on the location, and the terminal to be connected is determined based on the priority. Now, consider the calculation of the location. For example, if there are 10 terminals, the locations of the 10 terminals are calculated. By the time the location of the 10th terminal is calculated, the initially calculated location may have changed. Therefore, some of the locations of the 10 terminals may be inaccurate. Furthermore, the priority determined based on the less accurate location may also be inaccurate. Therefore, the above technology may not be optimal.

[0005] The objective of the present disclosure is to connect to multiple suitable terminals simultaneously.

[0006] According to one aspect of the present disclosure, there is provided a communication device including: a first wireless communication control unit capable of simultaneously conducting first wireless communication with N1 (N1 is a positive integer) terminals; and a second wireless communication control unit capable of simultaneously conducting second wireless communication with N2 (N2 is a positive integer) terminals among the terminals conducting the first wireless communication, where N2 is smaller than N1.

[0007] According to the present disclosure, it is possible to simultaneously connect to multiple appropriate terminals.

[0008] 1 is a diagram illustrating an authentication system; 2 is a diagram illustrating hardware included in an authentication device; 3 is a block diagram illustrating functions of an authentication device; 4 is a block diagram illustrating functions of a terminal; 5 is a flowchart illustrating an example (part 1) of processing executed by an authentication device; 6 is a flowchart illustrating an example (part 2) of processing executed by an authentication device; 7 is a diagram illustrating an example of calculation of arrival time; 8 is a flowchart illustrating an example (part 3) of processing executed by an authentication device; and 9 is a flowchart illustrating an example of processing executed by a terminal.

[0009] Hereinafter, embodiments will be described with reference to the drawings. The following embodiments are merely examples, and various modifications are possible within the scope of the present disclosure.

[0010] Embodiment. FIG. 1 is a diagram showing an authentication system. The authentication system includes an authentication device 100 and terminals 200a to 200c. The authentication device 100 is also called a communication device. For example, the authentication device 100 is installed near the entrance of a building. The terminals 200a to 200c are terminals used by users. FIG. 1 shows three terminals. The number of terminals is not limited to three. In the following description, the terminals 200a to 200c are collectively referred to as terminal 200. For example, the door 300 is a security gate. The authentication device 100 can control the door 300 depending on the authentication result. For example, if authentication by the authentication device 100 is successful, the authentication device 100 controls the door 300 to open it.

[0011] Next, a description will be given of the hardware included in the authentication device 100. Fig. 2 is a diagram showing the hardware included in the authentication device 100. The authentication device 100 includes a processor 101, a volatile storage device 102, and a non-volatile storage device 103.

[0012] The processor 101 controls the entire authentication device 100. For example, the processor 101 is a central processing unit (CPU) or a field programmable gate array (FPGA). The processor 101 may be a multiprocessor. The authentication device 100 may also include a processing circuit.

[0013] The volatile storage device 102 is a main storage device of the authentication device 100. For example, the volatile storage device 102 is a random access memory (RAM). The nonvolatile storage device 103 is an auxiliary storage device of the authentication device 100. For example, the nonvolatile storage device 103 is a hard disk drive (HDD) or a solid state drive (SSD).

[0014] Similarly to the authentication device 100, the terminal 200 also includes a processor, a volatile storage device, and a non-volatile storage device.

[0015] Next, the functions of the authentication device 100 will be described. Fig. 3 is a block diagram showing the functions of the authentication device. The authentication device 100 has a storage unit 110, a transmission unit 120, a first wireless communication control unit 130, a second wireless communication control unit 140, an authentication unit 150, and a door control unit 160.

[0016] The storage unit 110 may be realized as a storage area secured in the volatile storage device 102 or the non-volatile storage device 103. Some or all of the transmission unit 120, the first wireless communication control unit 130, the second wireless communication control unit 140, the authentication unit 150, and the door control unit 160 may be realized by a processing circuit. Furthermore, some or all of the transmission unit 120, the first wireless communication control unit 130, the second wireless communication control unit 140, the authentication unit 150, and the door control unit 160 may be realized as program modules executed by the processor 101.

[0017] The storage unit 110 stores authentication information 111. The authentication information 111 indicates a terminal that can unlock the door 300. An administrator can update the authentication information 111. The functions of the transmission unit 120, the first wireless communication control unit 130, the second wireless communication control unit 140, the authentication unit 150, and the door control unit 160 will be described in detail later.

[0018] Here, the first wireless communication control unit 130 can perform the first wireless communication simultaneously with N1 terminals 200. N1 is a positive integer. N1 may be considered to be an integer equal to or greater than 2. The second wireless communication control unit 140 can perform the second wireless communication simultaneously with N2 terminals 200 among the terminals 200 performing the first wireless communication. N2 is a positive integer. Note that N2 is smaller than N1.

[0019] Next, a description will be given of the functions of the terminal 200. Fig. 4 is a block diagram showing the functions of the terminal. The terminal 200 has a receiving unit 210, a first wireless communication control unit 220, and a second wireless communication control unit 230.

[0020] Some or all of the receiving unit 210, the first wireless communication control unit 220, and the second wireless communication control unit 230 may be realized by a processing circuit included in the terminal 200. Also, some or all of the receiving unit 210, the first wireless communication control unit 220, and the second wireless communication control unit 230 may be realized as program modules executed by a processor included in the terminal 200. The functions of the receiving unit 210, the first wireless communication control unit 220, and the second wireless communication control unit 230 will be described in detail later.

[0021] Next, the processing executed by the authentication device 100 will be described using a flowchart. FIG. 5 is a flowchart showing an example (part 1) of the processing executed by the authentication device. (Step S11) The transmitter 120 periodically transmits packets by broadcast. Note that the packets contain identification information of the authentication device 100. By transmitting the packets, the terminals 200 present in the vicinity of the authentication device 100 can receive the packets. When the terminal 200 receives the packets, it transmits a connection establishment request for the first wireless communication. Note that the connection establishment request may also be called a start request packet.

[0022] (Step S12) The first wireless communication control unit 130 determines whether or not a connection establishment request for the first wireless communication has been received. If a connection establishment request for the first wireless communication has been received, the process proceeds to step S13. If a connection establishment request for the first wireless communication has not been received, the process proceeds to step S11. (Step S13) The first wireless communication control unit 130 determines whether or not the number of connected devices for the first wireless communication is less than N1. If the number of connected devices is N1, the process proceeds to step S14. If the number of connected devices is less than N1, the process proceeds to step S16.

[0023] (Step S14) The first wireless communication control unit 130 determines whether or not to select a terminal 200 to be disconnected from among the terminals 200 with which a connection of the first wireless communication has been established.

[0024] The selection process will be described in detail. The first wireless communication control unit 130 transmits data to the terminal 200 with which the first wireless communication connection is established (i.e., the terminal 200 of N1). The terminal 200 of N1 measures the received signal strength (RSSI: Received Signal Strength Indicator) when receiving the data. The terminal 200 of N1 transmits the measured RSSI to the authentication device 100. The first wireless communication control unit 130 receives the RSSI from each of the terminals 200 of N1. The first wireless communication control unit 130 detects the minimum RSSI from among the multiple RSSIs. If the minimum RSSI is equal to or less than a predetermined threshold, the first wireless communication control unit 130 determines to select the terminal 200 to be disconnected from among the terminals 200 of N1.

[0025] Alternatively, the following selection process may be executed. The first wireless communication control unit 130 transmits data to the terminal 200 of N1. The first wireless communication control unit 130 receives a response to the data from each of the terminals 200 of N1, and measures the RSSI at the time of receiving the response. This allows the first wireless communication control unit 130 to obtain multiple RSSIs. The first wireless communication control unit 130 detects the minimum RSSI from among the multiple RSSIs. If the minimum RSSI is equal to or less than the threshold, the first wireless communication control unit 130 determines that the terminal 200 to be disconnected should be selected from the terminals 200 of N1. Note that the threshold is set to a value indicating that the terminal 200 is approaching the authentication device 100.

[0026] If the condition is satisfied, the process proceeds to step S15. If the condition is not satisfied, the first wireless communication control unit 130 determines not to perform the first wireless communication with the terminal 200 that transmitted the connection establishment request received in step S12. Then, the process proceeds to step S11.

[0027] (Step S15) The first wireless communication control unit 130 disconnects the connection. For example, the first wireless communication control unit 130 disconnects the connection established with the terminal 200 that transmitted the RSSI with the smallest value. Also, for example, the first wireless communication control unit 130 disconnects the connection established with the terminal 200 that transmitted the response when the RSSI with the smallest value was measured.

[0028] (Step S16) The first wireless communication control unit 130 establishes a connection with the terminal 200 that transmitted the connection establishment request received in step S12. This allows the authentication device 100 and the terminal 200 to perform the first wireless communication. For example, the first wireless communication uses Bluetooth Classic communication or Bluetooth Low Energy communication. Then, the process proceeds to step S21. Note that Bluetooth is a registered trademark.

[0029] The above describes a case where the first wireless communication control unit 130 executes the selection process. However, the first wireless communication control unit 130 does not have to execute the selection process. The first wireless communication control unit 130 detects the terminal 200 among the terminals 200 in N1 that has established a connection for the longest time. The first wireless communication control unit 130 disconnects the connection established with the detected terminal 200. The first wireless communication control unit 130 then establishes a connection with the terminal 200 that transmitted the connection establishment request received in step S12. As described below, the distance between the authentication device 100 and the terminal 200 with which the second wireless communication connection is established is calculated. The first wireless communication control unit 130 may disconnect the connection established with the terminal 200 when the longest distance is calculated. The first wireless communication control unit 130 may then establish a connection with the terminal 200 that transmitted the connection establishment request received in step S12.

[0030] The first wireless communication control unit 130 may also execute the following process. First, the storage unit 110 stores authentication management information. The authentication management information is information indicating a correspondence between authenticated terminals and authentication times. For example, authenticated terminals are managed by terminal identifiers (IDs). The first wireless communication control unit 130 uses the authentication management information to determine whether the terminal 200 that transmitted the connection establishment request received in step S12 is an authenticated terminal. For example, the terminal 200 transmits its terminal ID to the authentication device 100. The first wireless communication control unit 130 uses the authentication management information and the terminal ID to determine whether the terminal 200 is an authenticated terminal. If the terminal 200 is an authenticated terminal, the first wireless communication control unit 130 uses the authentication management information to determine whether the difference between the current time and the authentication time is equal to or less than a predetermined threshold. If the difference is equal to or less than the threshold, the first wireless communication control unit 130 decides not to perform first wireless communication with the terminal 200. This allows the authentication device 100 to prevent reconnection.

[0031] 6 is a flowchart showing an example (part 2) of processing executed by the authentication device. (Step S21) The second wireless communication control unit 140 determines whether or not a connection establishment request for the second wireless communication has been received. If a connection establishment request for the second wireless communication has been received, the processing proceeds to step S22. If a connection establishment request for the second wireless communication has not been received, the second wireless communication control unit 140 waits.

[0032] (Step S22) The second wireless communication control unit 140 determines whether the number of connected devices for the second wireless communication is less than N2. If the number of connected devices is N2, the process proceeds to step S23. If the number of connected devices is less than N2, the process proceeds to step S26.

[0033] (Step S23) The second wireless communication control unit 140 calculates the distance between the authentication device 100 and each of the N2 terminals 200. A specific calculation method will be described. The second wireless communication control unit 140 calculates the distance between the authentication device 100 and each of the N2 terminals 200 using Time of Flight (ToF). Furthermore, the second wireless communication control unit 140 calculates the distance between the authentication device 100 and each of the N2 terminals 200 using Angle of Arrival (AoA). In this way, the second wireless communication control unit 140 may calculate multiple distances.

[0034] Furthermore, the second wireless communication control unit 140 may calculate the position of the terminal 200 based on the calculated distance and the direction in which the terminal 200 is located. The position is expressed in two-dimensional coordinates or three-dimensional coordinates. The position may also be expressed as an area in which the terminal 200 is located.

[0035] (Step S24) The second wireless communication control unit 140 determines whether or not to select a terminal 200 to be disconnected from among the terminals 200 with which a second wireless communication connection has been established (i.e., the terminals 200 of N2).

[0036] The selection process will be described in detail. The second wireless communication control unit 140 detects the maximum distance from among the multiple distances. If the maximum distance is equal to or greater than a predetermined threshold, the second wireless communication control unit 140 determines that a terminal 200 to be disconnected should be selected from among the terminals 200 in N2. Note that the threshold is set to a value indicating that the terminal 200 is approaching the authentication device 100.

[0037] Furthermore, the following selection process may be executed: The second wireless communication control unit 140 calculates a plurality of arrival times, which are the times required for the terminal 200 of N2 to arrive at the authentication device 100. Here, an example of calculating the arrival times is shown.

[0038] 7 is a diagram showing an example of calculation of arrival time. Distance 10 is the distance calculated in step S23. Position 11 is the position calculated in step S23. Position 12 is the position calculated previously. Assume that the previous calculation was performed 10 seconds ago. The second wireless communication control unit 140 calculates the speed of the user having the terminal 200 based on the distance between positions 11 and 12 and 10 seconds. The second wireless communication control unit 140 calculates the arrival time based on distance 10 and the speed.

[0039] Similarly, the second wireless communication control unit 140 calculates the arrival time of each of the terminals 200 of N2. As a result, multiple arrival times are calculated. The second wireless communication control unit 140 detects the longest arrival time from the multiple arrival times. If the longest arrival time is equal to or greater than a predetermined threshold, the second wireless communication control unit 140 determines that a terminal 200 to be disconnected should be selected from the terminals 200 of N2. Note that the threshold is set to a value indicating that the terminal 200 is approaching the authentication device 100.

[0040] If the condition is satisfied, the process proceeds to step S25. If the condition is not satisfied, the second wireless communication control unit 140 determines not to perform second wireless communication with the terminal 200 that transmitted the connection establishment request received in step S21. Then, the process proceeds to step S21.

[0041] The second wireless communication control unit 140 may also execute the following process. First, the storage unit 110 stores authentication management information. The authentication management information is information indicating the correspondence between authenticated terminals and authentication times. For example, authenticated terminals are managed by terminal IDs. The second wireless communication control unit 140 uses the authentication management information to determine whether the terminal 200 that transmitted the connection establishment request received in step S21 is an authenticated terminal. For example, the terminal 200 transmits its terminal ID to the authentication device 100. The second wireless communication control unit 140 uses the authentication management information and the terminal ID to determine whether the terminal 200 is an authenticated terminal. If the terminal 200 is an authenticated terminal, the second wireless communication control unit 140 uses the authentication management information to determine whether the difference between the current time and the authentication time is equal to or less than a predetermined threshold. If the difference is equal to or less than the threshold, the second wireless communication control unit 140 determines not to perform second wireless communication with the terminal 200. This allows the authentication device 100 to prevent reconnection.

[0042] (Step S25) The second wireless communication control unit 140 disconnects the connection. For example, the second wireless communication control unit 140 disconnects the connection established with the terminal 200 located farthest from the terminals 200 in N2 (i.e., the terminal 200 corresponding to the above-mentioned greatest distance). Also, for example, the second wireless communication control unit 140 disconnects the connection established with the terminal 200 with the latest arrival time from the terminals 200 in N2 (i.e., the terminal 200 corresponding to the above-mentioned greatest arrival time).

[0043] (Step S26) The second wireless communication control unit 140 establishes a connection with the terminal 200 that transmitted the connection establishment request received in step S21. This allows the authentication device 100 and the terminal 200 to perform second wireless communication. For example, the second wireless communication uses Ultra Wide Band communication. Then, the process proceeds to step S31.

[0044] 8 is a flowchart showing an example (part 3) of processing executed by the authentication device. (Step S31) The second wireless communication control unit 140 receives terminal identification information of the terminal 200 from the terminal 200. For example, the terminal identification information is the physical address of the terminal 200 and a character string that can identify the terminal 200. The second wireless communication control unit 140 may also receive a wireless communication ID and a communication interval from the terminal 200. (Step S32) The authentication unit 150 executes authentication processing using the authentication information 111 and the terminal identification information.

[0045] (Step S33) The door control unit 160 determines whether the authentication result indicates success. If the authentication result indicates success, the process proceeds to step S34. If the authentication result indicates failure, the process proceeds to step S35. The second wireless communication control unit 140 may also transmit the authentication result to the terminal 200. (Step S34) The door control unit 160 controls the door 300. (Step S35) The second wireless communication control unit 140 disconnects the second wireless communication connection. (Step S36) The first wireless communication control unit 130 disconnects the first wireless communication connection. The first wireless communication control unit 130 does not have to disconnect the first wireless communication connection.

[0046] Next, the processing executed by the terminal 200 will be described using a flowchart. FIG. 9 is a flowchart showing an example of the processing executed by the terminal. (Step S41) The receiving unit 210 determines whether or not a packet transmitted by the authentication device 100 has been received. For example, Bluetooth Classic communication or Bluetooth Low Energy communication is used to receive the packet. If a packet has been received, the processing proceeds to step S42. If a packet has not been received, the terminal 200 waits until a packet is received.

[0047] (Step S42) The first wireless communication control unit 220 transmits a connection establishment request for the first wireless communication. (Step S43) The second wireless communication control unit 230 determines whether or not a connection for the first wireless communication has been established. If the connection has been established, the process proceeds to step S44. If the connection has not been established, the process proceeds to step S41. (Step S44) The second wireless communication control unit 230 transmits a connection establishment request for the second wireless communication. (Step S45) The second wireless communication control unit 230 determines whether or not a connection for the second wireless communication has been established. If the connection has been established, the process ends. If the connection has not been established, the process proceeds to step S44.

[0048] As described above, the authentication device 100 calculates the distance between the authentication device 100 and each of the N2 terminals 200, or the position of each of the N2 terminals 200. Here, N2 is the same as N1. N2 is set to "10." The authentication device 100 calculates the positions of ten terminals 200. By the time the position of the tenth terminal is calculated, the initially calculated position may have changed. Therefore, some of the positions of the ten terminals 200 may be inaccurate. Similarly, when distances are calculated, some of the distances among the ten distances may be inaccurate. In this way, when N1 and N2 are the same, inaccurate information is calculated. Therefore, N2 is set to a value smaller than N1. This shortens the time required to calculate the distance or position. Therefore, the accuracy of the distance or position is improved. Therefore, the authentication device 100 can simultaneously connect to multiple appropriate terminals. According to the embodiment, since N2 is smaller than N1, the authentication device 100 can simultaneously connect to a plurality of appropriate terminals.

[0049] In addition, the above describes an example in which authentication is performed. However, the embodiment may be applied to cases other than when authentication is performed. That is, the embodiment may be applied to cases other than when authentication is performed, as long as it is possible to connect to multiple terminals simultaneously.

[0050] 10 Distance, 11 Position, 12 Position, 100 Authentication device, 101 Processor, 102 Volatile storage device, 103 Non-volatile storage device, 110 Storage unit, 111 Authentication information, 120 Transmission unit, 130 First wireless communication control unit, 140 Second wireless communication control unit, 150 Authentication unit, 160 Door control unit, 200, 200a to 200c Terminal, 210 Receiving unit, 220 First wireless communication control unit, 230 Second wireless communication control unit, 300 Door.

Claims

1. A communication device, a first wireless communication control unit capable of performing first wireless communication simultaneously with N1 (N1 is a positive integer) terminals; a second wireless communication control unit that can simultaneously perform second wireless communication with N2 (N2 is a positive integer) of the terminals that are performing the first wireless communication; and N2 is smaller than N1, The second wireless communication control unit receiving a connection establishment request for the second wireless communication; When the number of connected terminals of the second wireless communication is N2, calculate a distance between the communication device and each of the terminals of N2; Detect the maximum distance from multiple distances, If the maximum distance is equal to or greater than a predetermined threshold, disconnect the connection established with the terminal corresponding to the maximum distance and establish a connection with the terminal that has transmitted the connection establishment request for the second wireless communication; if the maximum distance is smaller than the threshold, decide not to perform the second wireless communication with the terminal that has transmitted the connection establishment request for the second wireless communication. Communication equipment.

2. A communication device, a first wireless communication control unit capable of performing first wireless communication simultaneously with N1 (N1 is a positive integer) terminals; a second wireless communication control unit that can simultaneously perform second wireless communication with N2 (N2 is a positive integer) of the terminals that are performing the first wireless communication; and N2 is smaller than N1, The second wireless communication control unit receiving a connection establishment request for the second wireless communication; When the number of connected terminals of the second wireless communication is N2, calculate a plurality of arrival times which are times required for the terminals of N2 to arrive at the communication device; Detecting the longest arrival time from the plurality of arrival times; when the maximum arrival time is equal to or greater than a predetermined threshold, disconnect the connection established with the terminal corresponding to the maximum arrival time and establish a connection with the terminal that has transmitted the connection establishment request for the second wireless communication; and when the maximum arrival time is smaller than the threshold, decide not to perform the second wireless communication with the terminal that has transmitted the connection establishment request for the second wireless communication. Communication equipment.

3. A first wireless communication control unit capable of performing first wireless communication simultaneously with N1 terminals (N1 is a positive integer), a second wireless communication control unit that can simultaneously perform second wireless communication with N2 (N2 is a positive integer) of the terminals that are performing the first wireless communication; a storage unit that stores authentication management information that is information indicating a correspondence between an authenticated terminal and an authentication time; and N2 is smaller than N1, The second wireless communication control unit receiving a connection establishment request for the second wireless communication; if the terminal that has transmitted the connection establishment request for the second wireless communication is an authenticated terminal, using the authentication management information, determine whether or not a difference between a current time and the authentication time is equal to or less than a predetermined threshold; If the difference is equal to or smaller than the threshold, it is determined not to perform the second wireless communication with the terminal that has transmitted the connection establishment request for the second wireless communication. Communication equipment.

4. A first wireless communication control unit capable of performing first wireless communication simultaneously with N1 (N1 is a positive integer) terminals; a second wireless communication control unit that can simultaneously perform second wireless communication with N2 (N2 is a positive integer) of the terminals that are performing the first wireless communication; and N2 is smaller than N1, The first wireless communication control unit receiving a connection establishment request for the first wireless communication; When the number of connected terminals of the first wireless communication is N1, transmitting data to the terminals of N1; receiving a received signal strength from each of the N1 terminals; Detecting a minimum received signal strength from among the plurality of received signal strengths; If the minimum value of the received signal strength is equal to or less than a predetermined threshold, disconnect the connection established with the terminal that transmitted the minimum value of the received signal strength and establish a connection with the terminal that transmitted the connection establishment request for the first wireless communication; if the minimum value of the received signal strength is greater than the threshold, decide not to perform the first wireless communication with the terminal that transmitted the connection establishment request for the first wireless communication. Communication equipment.

5. A first wireless communication control unit capable of performing first wireless communication simultaneously with N1 (N1 is a positive integer) terminals; a second wireless communication control unit that can simultaneously perform second wireless communication with N2 (N2 is a positive integer) of the terminals that are performing the first wireless communication; and N2 is smaller than N1, The first wireless communication control unit receiving a connection establishment request for the first wireless communication; When the number of connected terminals of the first wireless communication is N1, transmitting data to the terminals of N1; receiving a response to the data from each of the terminals of N1 and measuring a received signal strength when the response is received; Detecting a minimum received signal strength from among the plurality of received signal strengths; When the minimum value of the received signal strength is equal to or less than a predetermined threshold, the connection established with the terminal that transmitted the response when the minimum value of the received signal strength was measured is terminated, and a connection is established with the terminal that transmitted the connection establishment request for the first wireless communication; when the minimum value of the received signal strength is greater than the threshold, it is determined not to perform the first wireless communication with the terminal that transmitted the connection establishment request for the first wireless communication. Communication equipment.

6. A first wireless communication control unit capable of performing first wireless communication simultaneously with N1 terminals (N1 is a positive integer); a second wireless communication control unit that can simultaneously perform second wireless communication with N2 (N2 is a positive integer) of the terminals that are performing the first wireless communication; and N2 is smaller than N1, The first wireless communication control unit receiving a connection establishment request for the first wireless communication; Detecting the terminal that has established a connection for the longest time among the terminals of the N1; disconnecting the connection established with the detected terminal and establishing a connection with the terminal that transmitted the connection establishment request for the first wireless communication; Communication equipment.

7. A first wireless communication control unit capable of performing first wireless communication simultaneously with N1 (N1 is a positive integer) terminals; a second wireless communication control unit that can simultaneously perform second wireless communication with N2 (N2 is a positive integer) of the terminals that are performing the first wireless communication; a storage unit that stores authentication management information that is information indicating a correspondence between an authenticated terminal and an authentication time; and N2 is smaller than N1, The first wireless communication control unit receiving a connection establishment request for the first wireless communication; if the terminal that has transmitted the connection establishment request for the first wireless communication is an authenticated terminal, using the authentication management information, determine whether or not a difference between a current time and the authentication time is equal to or less than a predetermined threshold; If the difference is equal to or smaller than the threshold, it is determined not to perform the first wireless communication with the terminal that has transmitted the connection establishment request for the first wireless communication. Communication equipment.