JP2024044596A - Access point, communication terminal, and communication system - Google Patents

Abstract

[Problem] To provide an access point that can automatically delete connection information of an access point in a communication terminal. [Solution] The access point includes a communication unit that communicates with a communication terminal and a control unit that controls the communication, and the control unit transmits control information related to the deletion of the connection information of the access point in the communication terminal to the communication terminal by including the control information in a predetermined packet. [Selected Figure] Figure 3

Description

The present invention relates to an access point, a communication terminal, and a communication system.

A technology is known in which a communication terminal device equipped with a wireless connection unit that performs wireless communication with an access point stores, for each access point, AP information required to connect to the access point and location information indicating a location near the access point in association with each other, and displays the location information for an access point selected by a user (see, for example, Patent Document 1).

JP 2013-98708 A

When a communication device connects to an access point, the connection information is saved as history on the communication device. The connection information will remain stored unless the user intentionally deletes it.

When a communication device detects radio waves from an access point, it can automatically connect to the access point without user operation by comparing it with connection information stored as a history.

However, if connection information is stored on a communications device, there is a risk that the device may unintentionally connect to a malicious access point and get into trouble. Furthermore, previously, deleting connection information required the user's own judgment and operation.

One aspect of the present invention aims to provide an access point, a communication terminal, and a communication system that can automatically delete connection information of an access point in a communication terminal.

An access point according to one aspect of the present invention is an access point that includes a communication unit that communicates with a communication terminal and a control unit that controls the communication, and the control unit transmits control information related to the deletion of connection information of the access point in the communication terminal in a specified packet to the communication terminal.

A communication terminal according to one aspect of the present invention includes: a communication unit that communicates with an access point;
The device comprises a control unit that controls the communication and a memory unit that stores connection information of the access point, wherein the communication unit receives a specified packet from the access point including control information regarding the deletion of the connection information, and the control unit deletes the connection information based on the control information.
A communication system according to one embodiment of the present invention is a communication system comprising an access point and a communication terminal communicating with the access point, wherein the access point comprises a first communication unit communicating with the communication terminal and a first control unit controlling communication with the communication terminal, wherein the first control unit transmits control information regarding deletion of connection information of the access point in the communication terminal included in a specified packet to the communication terminal, wherein the communication terminal comprises a second communication unit communicating with the access point, a second control unit controlling communication with the access point, and a memory unit storing the connection information, wherein the second communication unit receives the specified packet including the control information from the access point, and the control unit deletes the connection information based on the control information.

1 is a configuration diagram of a communication system according to a first embodiment; 1 is a configuration diagram of a communication terminal according to a first embodiment; FIG. FIG. 2 is a configuration diagram of an access point according to the first embodiment. 13 is an example of a connection information group. 13 is an example of a connection information group. 13 is an example of a connection information group. FIG. 2 is a sequence diagram of a communication method according to the first embodiment. This is an example of a display screen. This is an example of a display screen. This is an example of a display screen. 1 is an example of a display screen. 1 is an example of a display screen. FIG. 11 is a sequence diagram of a communication method according to a second embodiment. FIG. 13 is a sequence diagram of a communication method according to a third embodiment.

The following describes the embodiments with reference to the drawings. Note that in the drawings, the same or equivalent elements are given the same reference numerals, and duplicate descriptions are omitted.

(First embodiment)
FIG. 1 is a configuration diagram of a communication system according to a first embodiment.

Communication system 101 includes communication terminal 201 and access point 301. Note that there may be a plurality of communication terminals 201 and access points 301.

The communication terminal 201 and the access point 301 communicate by wireless communication between the communication terminal 201 and the access point 301. The communication terminal 201 and the access point 301 perform wireless communication according to a wireless LAN (Local Area Network) standard such as IEEE 802.11, for example.

The communication terminal 201 is, for example, a smartphone, a tablet, a laptop PC (Personal Computer), or the like. Further, the access point 301 is connected to a network such as a LAN (not shown) or a WAN (Wide Area Network) (not shown).

FIG. 2 is a configuration diagram of a communication terminal according to the first embodiment.

Communication terminal 201 includes a control section 211 , a communication section 221 , a display section 231 , an input section 241 , and a storage section 251 .

The control unit 211 controls the communication terminal 201. Specifically, the control unit 211 controls communication with the access point 301 via the communication unit 221. The control unit 211 transmits and receives various packets via the communication unit 221. The control unit 211 manages the storage and deletion of the connection information of the access point 301 stored in the storage unit 251. Control unit 211 deletes connection information based on control information included in a predetermined packet received from access point 301.

The control information indicates that deletion of the connection information is forced, that deletion of the connection information is recommended, or that the connection information is not deleted. When the control information indicates that deletion of the connection information is forced, the control unit 211 deletes the connection information at a predetermined timing. When the control information indicates that deletion of the connection information is recommended, the control unit 211 inquires of the user whether or not to delete the connection information, and when the user responds that the connection information is deleted, the control unit 211 deletes the connection information at a predetermined timing. Delete information. When the control information indicates that the connection information is not deleted, the control unit 211 does not delete the connection information at a predetermined timing.

The control unit 211 is, for example, a processor such as a CPU (Central Processing Unit) or a logic circuit (hardware) formed in an integrated circuit (IC (Integrated Circuit) chip).

The communication unit 221 communicates with the access point 301. Specifically, the communication unit 221 transmits and receives wireless signals via an antenna 222 connected to the communication unit 221. The communication unit 221 converts (decodes) the received wireless signal into a signal that the control unit 221 can process, and outputs the signal to the control unit 221. The communication unit 221 also converts the signal output from the control unit 221 to the communication unit 221 into a signal that complies with the wireless communication method used between the communication terminal 201 and the access point 301, and transmits the wireless signal from the antenna 222. The communication unit 221 receives a predetermined packet including control information related to the deletion of connection information stored in the storage unit 251 from the access point 301. The communication unit 221 is, for example, a wireless communication interface.

The display unit 231 displays various information such as the operation and status of the communication terminal 201. The display unit 231 also displays operation buttons for operating the communication terminal 201 using a touch panel. The display unit 231 is, for example, a liquid crystal display.

The input unit 241 is an input device that accepts input operations by the user. The input unit 241 is, for example, a button or a touch panel. For example, the touch panel detects a touch by the user's finger on an operation button or the like displayed on the display unit 231.

The storage unit 251 stores programs, data, etc. used in the communication terminal 201. The storage unit 251 stores connection information of the access point 301. Details of the connection information will be described later. The storage unit 251 is, for example, a storage device such as a RAM (Random Access Memory), a flash memory, or an HDD (Hard Disk Drive).

FIG. 3 is a configuration diagram of an access point according to the first embodiment.

The access point 301 includes a control section 311, a communication section 321, a display section 331, an input section 341, and a storage section 351.

The control unit 311 controls the access point 301. Specifically, the control unit 311 controls communication with the communication terminal 201 via the communication unit 321. The control unit 311 transmits control information related to the deletion of the connection information of the access point 301 in the communication terminal 201 to the communication terminal via the communication unit 321, the control information being included in a predetermined packet.

The control information indicates whether to force the deletion of the connection information, to recommend the deletion of the connection information, or to not delete the connection information. The control information may further include a retention period for the connection information.

The control unit 311 is, for example, a processor such as a CPU or a logic circuit (hardware) formed in an integrated circuit (IC chip), etc.

The communication unit 321 communicates with the communication terminal 201. Specifically, the communication unit 321 transmits and receives wireless signals via an antenna 322 connected to the communication unit 321. The communication unit 321 converts (decodes) the received wireless signal into a signal that can be processed by the control unit 311 and outputs the signal to the control unit 311. Furthermore, the communication unit 321 converts the signal output from the control unit 311 to the communication unit 321 into a signal compliant with the wireless communication method used between the communication terminal 201 and the access point 301, and transmits the wireless signal from the antenna 322. do. The communication unit 321 is, for example, a wireless communication interface.

The display unit 331 displays various information such as the operation and status of the access point 301. The display unit 331 is, for example, a liquid crystal display.

The input unit 341 is an input device that accepts input operations by the user. The input unit 341 is, for example, a button or a touch panel.

The storage unit 351 stores programs, data, etc. used by the access point 301. The storage unit 351 stores various information such as the SSID of the access point 301 and security information indicating the encryption method used in communication between the communication terminal 201 and the access point 301. Furthermore, the storage unit 351 stores control information and a retention period regarding deletion of connection information of the access point 301 in the communication terminal 201. The storage unit 351 is, for example, a storage device such as a RAM, a flash memory, or an HDD.

Here, the connection information stored in the storage unit 251 of the communication terminal 201 will be explained.

Figures 4A to 4C are examples of connection information groups.

The connection information group 401-i (i=1 to 3) includes connection information for each access point 301 (network) and control information for deletion of the connection information. Specifically, the SSID, Security, Password, and automatic deletion for each access point 301 are recorded in association with each other.

The SSID is information that identifies the access point 301.

Security indicates the encryption method used in communication between the communication terminal 201 and the access point 301.

Password is a password for connecting to the access point 301.

Automatic deletion indicates control information regarding deletion of connection information of the access point 301. "Forced" indicates that the connection information will be deleted at a predetermined trigger, "Recommended" indicates that deletion of the connection information is recommended, and "None" indicates that the connection information will not be deleted at a predetermined trigger. show. In addition, "Automatic deletion" may further include the result of inquiring the user whether to delete the connection information when the control information is "recommended". Further, "automatic deletion" may further include a retention period indicating the timing of deletion of the connection information.

The connection information group 401-1 shown in FIG. 4A includes connection information for two access points, and the connection information for each access point is recorded with indexes [Network1] and [Network2], respectively.

[Network1] in the upper row of the connection information group 401-1 contains the connection information of the first access point as SSID=SSID-A123, Security=WPA3, Password=12345678, and the control information as automatic deletion=forced (300 seconds). ) are recorded. 300 seconds indicates the retention period. That is, this indicates that the connection information of the first access point is forcibly (automatically) deleted after 300 seconds have elapsed from a predetermined trigger. The predetermined trigger is, for example, when disconnection from the access point occurs. Details of the predetermined trigger will be described later.

In the lower section of connection information group 401-1, [Network2] records the connection information for the second access point as SSID=SSID-D567, Security=WPA2, Password=12341234, and the control information as Automatic deletion=None. In other words, this indicates that the connection information for the second access point will not be deleted at a specified opportunity.

The connection information group 401-2 shown in FIG. 4B includes connection information for two access points, and the connection information for each access point is recorded with indexes [Network1] and [Network2], respectively.

In the upper row of connection information group 401-2, [Network1] records the following connection information for the first access point: SSID=SSID-B234, Security=WPA/WPA2, Password=87654321, and automatic deletion=recommended (180 seconds) [Accepted] as control information. 180 seconds indicates the retention period. [Accepted] indicates the result of querying the user as to whether or not to delete the connection information, and indicates that the user responded that the information should be deleted. In other words, it indicates that the connection information for the first access point will be forcibly (automatically) deleted 180 seconds after a specified trigger.

In [Network2] at the bottom of the connection information group 401-2, SSID=SSID-D567, Security=WPA2, Password=12341234 is recorded as the connection information of the second access point, and automatic deletion=None is recorded as the control information. ing. In other words, it indicates that the connection information of the second access point is not deleted at a predetermined timing.

The connection information group 401-2 shown in FIG. 4C includes connection information for two access points, and the connection information for each access point is recorded with indexes [Network1] and [Network2], respectively.

[Network1] at the top of the connection information group 401-3 includes connection information for the first access point, SSID=SSID-B234, Security=WPA/WPA2, Password=87654321, and control information, automatic deletion=recommended ( 180 seconds) [Rejected] is recorded. 180 seconds indicates the retention period. [Rejected] indicates the result of asking the user whether or not to delete the connection information, and indicates that the user responded that the connection information is not to be deleted. In other words, it indicates that the connection information of the first access point is not deleted after 180 seconds have elapsed from the predetermined trigger.

In [Network2] at the bottom of the connection information group 401-3, SSID=SSID-D567, Security=WPA2, Password=12341234 is recorded as the connection information of the second access point, and automatic deletion=None is recorded as the control information. ing. In other words, it indicates that the connection information of the second access point is not deleted at a predetermined timing.

Next, a communication method according to the first embodiment will be explained with reference to FIGS. 5 to 10.

FIG. 5 is a sequence diagram of the communication method according to the first embodiment. 6 to 10 are examples of display screens.

In step S501, the control unit 311 transmits a Beacon packet via the communication unit 321. The Beacon packet is a packet that broadcasts information about the access point 301 (network), and includes an SSID (Service Set Identifier) that identifies the access point 301, security information, and the like. Note that the control unit 311 includes control information regarding deletion of the connection information of the access point 301 in the communication terminal 201 in the Beacon packet. The Beacon packet is an example of a predetermined packet. The communication unit 221 receives a Beacon packet from the access point 301.

In step S502, the control unit 211 transmits a Probe Request packet to the access point 301 via the communication unit 221. The Probe Request packet is a packet that requests network information. The communication unit 321 receives a Probe Request packet from the communication terminal 201.

In step S503, the control unit 311 transmits a Probe Response packet to the communication terminal 201 via the communication unit 321. The Probe Response packet is a response to the Probe Response packet, and is a packet that provides network information. The Probe Response packet includes security information indicating the SSID of the access point 301 and the encryption method used in communication with the access point 301. Note that the control unit 311 includes control information regarding deletion of the connection information of the access point 301 in the communication terminal 201 in the Probe Response packet. The Probe Response packet is an example of a predetermined packet. The communication unit 221 receives a Probe Response packet from the access point 301.

In step S504, the control unit 211 displays access point connection information (“SSID” and “Security”) and control information for deletion of the connection information (“automatic deletion”) on the display unit 231, as shown in FIG. indicate. The user selects an access point to connect to and enters the password. Here, the access point 301 is selected and the password of the access point 301 is input. The control unit 211 stores the connection information of the selected access point 301 and control information for deletion of the connection information in the storage unit 251. Note that if the control information for deletion of connection information has not been received yet, the control section 211 does not need to display the control information on the display section 231, but stores it in the storage section 251 when the control information is received. The control unit 211 transmits an authentication packet to the access point 301 via the communication unit 221. The communication unit 321 receives an Authentication packet from the communication terminal 201.

In step S505, the control unit 311 transmits an Authentication packet to the communication terminal 201 via the communication unit 321. The control unit 311 includes control information related to the deletion of the connection information of the access point 301 in the communication terminal 201 in the Authentication packet. The Authentication packet is an example of a predetermined packet. The communication unit 221 receives the Authentication packet from the access point 301.

In step S506, the control unit 211 transmits an Association Request packet to the access point 301 via the communication unit 221. The Association Request packet is a packet that requests connection. The communication unit 321 receives an Association Request packet from the communication terminal 201.

In step S507, the control unit 311 transmits an Association Response packet to the communication terminal 201 via the communication unit 321. The Association Response packet is a response to the Association Request packet, and is a packet indicating permission for connection, an error, and the like. Note that the control unit 311 includes control information regarding deletion of the connection information of the access point 301 in the communication terminal 201 in the Association Response packet. The Association Response packet is an example of a predetermined packet. The communication unit 221 receives an Association Response packet from the access point 301.

In step S508, the control unit 211 and the control unit 311 perform a 4-way handshake to establish a connection between the communication terminal 201 and the access point 301.

In step S509, the control unit 211 deletes the connection information based on the control information included in the predetermined packet at a predetermined opportunity. The predetermined opportunity is, for example, when the access point 301 is disconnected, and specifically, when the communication unit 221 receives a Deauthentication packet from the access point 301, when the communication unit 221 receives a Disassociation packet from the access point 301, when the control unit 211 transmits a Deauthentication packet to the access point 301 via the communication unit 221, when the control unit 211 transmits a Disassociation packet to the access point 301 via the communication unit 221, and when radio waves from the access point 301 are lost.

If the control information received from the access point 301 indicates that deletion of the connection information is to be forced, the control unit 211 deletes the connection information of the access point 301 from the storage unit 251 at a predetermined timing. If the control information received from the access point 301 includes a connection information retention period and the control information indicates that deletion of the connection information is to be forced, the control unit 211 deletes the connection information from the access point 301 after the retention period has elapsed from a predetermined trigger. connection information is deleted from the storage unit 251. When the communication terminal 201 is near the boundary of the communication range of the access point 301, the radio waves from the access point 301 are interrupted and disconnected, and then the radio wave condition is immediately restored and connection with the access point 301 becomes possible. occurs. In this case, after disconnection from the access point 301, the connection information remains without being deleted within the retention period, and reconnection is automatically performed, thereby preventing a decrease in usability.

If the control information received from the access point 301 indicates that deletion of the connection information is recommended, the control unit 211 inquires of the user whether or not to delete the connection information. For example, as shown in FIG. 7, the control unit 211 causes the display unit 231 to display a screen that inquires whether to provide connection information for the access point after disconnecting from the access point. Note that the timing of the inquiry is the above-mentioned predetermined trigger, or the elapse of the retention period from the above-mentioned predetermined trigger. Further, the control unit 211 may make the inquiry at a timing before the above-mentioned predetermined trigger.

If the user responds to the inquiry by deleting (for example, by touching the Accept button in FIG. 7), the control unit 211 records the user's response in the connection information. For example, as shown in [Network1] in the upper part of FIG. 4B, [Accepted] is entered in "Automatic deletion" to indicate that the user responded to delete. If the user responded to delete, the control unit 211 deletes the connection information from the recording unit 251 at a predetermined trigger. In addition, if the control information received from the access point 301 includes a retention period for the connection information, the control information received from the access point 301 indicates that the deletion of the connection information is recommended, and the user responded to the inquiry by deleting, the control unit 211 deletes the connection information of the access point 301 from the storage unit 251 after the retention period has elapsed from the predetermined trigger.

Further, during connection with the access point 301, the control unit 211 can display connection information of the access point 301 and deletion control information of the connection information on the display unit 231, as shown in FIG. FIG. 8 shows that the control information recommends deletion of the connection information, and shows that the connection information retention period is 180 seconds.

Further, if the control information received from the access point 301 indicates that deletion of the connection information is recommended and the user responds to the inquiry that the connection information be deleted, after a predetermined trigger, the control unit 211 deletes the connection information. It is possible to display on the display section 231 the time it takes to complete the process. For example, while connected to the access point 301, it is displayed that the connection information retention period is 180 seconds as shown in FIG. 8, but after a predetermined trigger, the retention period is is displayed as a countdown. That is, the holding period is decremented every second, and FIG. 9 shows a state in which the holding period is reduced from 180 seconds to 60 seconds. This allows the user to know how long it will take for the connection information to be deleted.

When the connection information of the access point 301 is deleted from the storage unit 251 after the retention period has elapsed from a predetermined trigger, a message that the connection information has been deleted is displayed on the display unit 231 as shown in FIG.

If the user responds to the inquiry that the connection will not be deleted (if the Reject button in FIG. 7 is touched), the control unit 211 records the user's response in the connection information. For example, as shown in [Network1] in the upper part of FIG. 4C, [Rejected] is entered in "Automatic deletion" to indicate that the user responded that the connection will not be deleted. If the user responds that the connection will not be deleted, the control unit 211 does not delete the connection information from the recording unit 251 at a specified trigger or after the retention period has elapsed since the specified trigger.

When the communication unit 221 receives multiple pieces of control information and the contents of the multiple pieces of control information differ, the control unit 211 deletes the connection information based on the contents indicated by the control information with the highest priority among the contents indicated by the received control information. For example, the highest priority is given to "forcing the deletion of the connection information," the second highest priority is given to "recommending the deletion of the connection information," and the lowest priority is given to "not deleting the connection information." The control unit 211 may also delete the connection information based on the control information received last.

As described above, in the communication method according to the first embodiment, the control unit 311 sends information of the access point 301 in the communication terminal 201 to predetermined packets (Beacon packet, Probe Response packet, Authentication packet, and Association Response packet). Contains control information for deleting connection information. Note that the control unit 311 may include the control information in at least one of the Beacon packet, Probe Response packet, Authentication packet, and Association Response packet instead of all of them.

Further, when increasing the confidentiality of the access point 301, the control unit 311 does not need to transmit the Beacon packet and the Probe Response packet. When connecting to such an access point 301, the sequence after step S504 is executed, so it is desirable to include control information in the Authentication packet and the Association Response packet.

According to the first embodiment, the deletion of the access point connection information in the communication terminal can be performed automatically. According to the first embodiment, the deletion of the access point connection information in the communication terminal can be controlled from the access point by including control information regarding the deletion of the connection information in a packet transmitted from the access point. According to the first embodiment, implementation is facilitated by including control information regarding the deletion of the connection information in the Beacon packet, Probe Response packet, Authentication packet, and Association Response packet used in the existing connection sequence.

Second Embodiment
In the first embodiment, control information regarding the deletion of connection information of access point 301 in communication terminal 201 is included in a Beacon packet, a Probe Response packet, an Authentication packet, and an Association Response packet, but in the second embodiment, the control information is included in a Deauthentication packet and a Disassociation packet.

Figure 11 is a sequence diagram of a communication method according to the second embodiment.

The processing of steps S1101 to S1108 is similar to the processing of steps S501 to S508, respectively. However, in steps S1101, S1103, S1105, and S1107, the control unit 311 does not need to include control information related to the deletion of connection information of the access point 301 in the communication terminal 201 in the Beacon packet, Probe Response packet, Authentication packet, and Association Response packet.

In step S1109, the control unit 311 transmits a Deauthentication packet and a Disassociation packet to the communication terminal 201 via the communication unit 321. Note that the control unit 311 may transmit either a Deauthentication packet or a Disassociation packet via the communication unit 321. The Deauthentication packet is a packet for canceling authentication and disconnecting, and the Disassociation packet is a packet for disconnecting. Note that the control unit 311 includes control information regarding deletion of the connection information of the access point 301 in the communication terminal 201 in the Deauthentication packet and the Disassociation packet. The Deauthentication packet and the Disassociation packet are examples of predetermined packets.

The control unit 211 deletes the connection information based on the control information included in a predetermined packet at a predetermined timing. The predetermined trigger is, for example, when disconnection from the access point 301 occurs; specifically, when the communication unit 221 receives a Deauthentication packet from the access point 301, and when the communication unit 221 receives a Disassociation from the access point 301. time etc. Deleting connection information based on control information is the same as in the first embodiment, so detailed explanation will be omitted.

According to the second embodiment, the deletion of the access point connection information in the communication terminal can be automatically performed. According to the second embodiment, the deletion of the access point connection information in the communication terminal can be controlled from the access point by including control information regarding the deletion of the connection information in a packet transmitted from the access point. According to the second embodiment, implementation is facilitated by including control information regarding the deletion of the connection information in the Deauthentication packet and Disassociation packet used in the existing connection sequence.

(Third embodiment)
In the first and second embodiments, control information is included in an existing packet such as a Beacon packet, but in the third embodiment, control information is included in a new packet.

Figure 12 is a sequence diagram of a communication method according to the third embodiment.

The processing in steps S1201 to S1208 is similar to the processing in steps S501 to S508, respectively. However, in steps S1201, S1203, S1205, and S1207, the control unit 311 does not include control information regarding deletion of connection information of the access point 301 in the communication terminal 201 in the Beacon packet, Probe Response packet, Authentication packet, and Association Response packet. It's fine.

After step S1208, arbitrary communication is performed between the communication terminal 201 and the access point 301.

In step S1209, the control unit 311 transmits a new packet containing control information regarding deletion of the connection information of the access point 301 in the communication terminal 201 to the communication terminal 201 via the communication unit 321. The new packet is, for example, a packet other than the Beacon packet, Probe Response packet, Authentication packet, Association Response packet, Deauthentication packet, and Disassociation packet used in the existing connection sequence, and is an example of a predetermined packet. There is. The new packet containing the control information may be transmitted at any timing between step S1208 and step S1210.

The process in step S1210 is similar to the process in step S509.

According to the third embodiment, connection information of an access point in a communication terminal can be automatically deleted. According to the third embodiment, by including control information regarding deletion of connection information in a packet transmitted from the access point, deletion of the connection information of the access point in the communication terminal can be controlled from the access point.

(others)
The first to third embodiments may be implemented independently, or any combination of the first to third embodiments may be implemented.

In the first to third embodiments described above, when the control information indicates that the deletion of the connection information is to be forced, the control unit 211 deletes the connection information at a predetermined trigger, but as long as the control information indicating that the connection information is not to be deleted is not included in the specified packet, the control unit 211 may delete the connection information at a predetermined trigger. Specifically, for example, when the control information included in the specified packet indicates that the connection information is not to be deleted, the control unit 211 does not delete the connection information at a predetermined trigger, and when the specified packet does not include control information indicating that the connection information is not to be deleted, the control unit 211 may delete the connection information at a predetermined trigger.

In addition, if the terminal device 201 is powered off before the connection information is deleted, the control unit 211 refers to the connection information group 401-i stored in the storage unit 251 when the terminal device 201 is restarted or wireless communication is enabled, and if there is connection information to be deleted that has "Automatic Deletion" set to "Forced" or "Recommended [Accepted]", it deletes that connection information.

The present invention is not limited to the above-described embodiment, but can be modified, and the above configurations can be replaced with substantially the same configurations, configurations that achieve the same effects, or configurations that can achieve the same objectives.

101 Communication system 201 Terminal device 211 Control unit 221 Communication unit 231 Display unit 241 Input unit 251 Storage unit 301 Access point 311 Control unit 321 Communication unit 331 Display unit 341 Input unit 351 Storage unit

Claims (14)

A communication unit that communicates with a communication terminal;
A control unit that controls the communication;
An access point comprising:
The control unit is an access point that includes control information related to deletion of connection information of the access point in the communication terminal in a predetermined packet and transmits the control information to the communication terminal. The access point according to claim 1, wherein the predetermined packet is at least one of a beacon packet, a probe response packet, an authentication packet, an association response packet, a deauthentication packet, and a disassociation packet. 3. The access point according to claim 1, wherein the control information indicates forcing deletion of the connection information, recommending deletion of the connection information, or not deleting the connection information. The access point according to claim 3, wherein the control information further includes a retention period for the connection information. a communication unit that communicates with the access point;
a control unit that controls the communication;
a storage unit that stores connection information of the access point;
Equipped with
The communication unit receives a predetermined packet containing control information regarding deletion of the connection information from the access point,
The control unit is a communication terminal that deletes the connection information based on the control information. 6. The communication terminal according to claim 5, wherein the predetermined packet is at least one of a Beacon packet, a Probe Response packet, an Authentication packet, an Association Response packet, a Deauthentication packet, and a Disassociation packet. 7. The communication terminal according to claim 5, wherein the control information indicates that deletion of the connection information is forced, that deletion of the connection information is recommended, or that the connection information is not deleted. 8. The communication terminal according to claim 7, wherein when the control information indicates that deletion of the connection information is forced, the control unit deletes the connection information at a predetermined timing. The control information further includes a retention period of the connection information,
8. The communication terminal according to claim 7, wherein when the control information indicates that deletion of the connection information is forced, the control unit deletes the connection information after the retention period has elapsed from a predetermined trigger. When the control information indicates that deletion of the connection information is recommended, the control unit inquires of a user whether or not to delete the connection information;
The communication terminal according to claim 7 , wherein, when the user responds that the connection information should be deleted, the control unit deletes the connection information at a predetermined opportunity. The control information further includes a retention period of the connection information,
When the control information indicates that deletion of the connection information is recommended, the control unit inquires of a user whether or not to delete the connection information;
The communication terminal according to claim 7 , wherein, when the user responds to delete the connection information, the control unit deletes the connection information after the retention period has elapsed from a predetermined trigger. The communication terminal according to claim 7, wherein, when the control information indicates that the connection information is not to be deleted, the control unit does not delete the connection information at a predetermined opportunity. When the control information indicates that the connection information is not deleted, the control unit does not delete the connection information at a predetermined timing;
8. The communication terminal according to claim 7, wherein if the predetermined packet does not include the control information indicating that the connection information is not to be deleted, the control unit deletes the connection information at a predetermined opportunity. A communication system comprising an access point and a communication terminal that communicates with the access point,
The access point is
A first communication unit that communicates with the communication terminal;
A first control unit that controls communication with the communication terminal;
Equipped with
the first control unit includes control information related to deletion of connection information of the access point in the communication terminal in a predetermined packet and transmits the control information to the communication terminal;
The communication terminal includes:
A second communication unit that communicates with the access point;
A second control unit that controls communication with the access point;
A storage unit that stores the connection information;
Equipped with
The second communication unit receives the predetermined packet including the control information from the access point,
The control unit deletes the connection information based on the control information.

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