JP2010087913A - Terminal apparatus, communication method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a user of a terminal apparatus to know whether a connection failure is caused by an input error of SSID or not when the user cannot connect a terminal apparatus to a radio base station, and to quickly eliminate the fault. <P>SOLUTION: The terminal apparatus 1 includes: an SSID input part 101 for inputting SSID specifying a radio base station 2; an SSID communication part 103 for transmitting the SSID to the radio base station 2 and trying connection; a neighboring SSID acquisition part 104 which when the connection trial fails, receives the SSID from an enabled radio base station 2; an SSID similarity calculation part 106 for calculating the similarity of the received SSID with the input SSID; an SSID input error determination part 107 for comparing the similarity with a threshold to determine whether the input SSID is an input error or not; and an error report part 108 which when the SSID input error determination part 107 determines the input error, reports the input error to the user of the terminal apparatus 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a terminal device, a communication method, and a program used in a wireless LAN system.

  In the wireless LAN system of the IEEE 802.11 standard, the wireless LAN access point is specified by the identifier SSID. In order to connect to the wireless LAN access point, the user of the terminal device inputs the SSID of the wireless LAN access point desired to be connected to the terminal device and transmits it to the wireless LAN access point for wireless LAN access. Wireless LAN connection can be established by recognizing the point. Therefore, when the user of the terminal device inputs an SSID different from the SSID of the wireless LAN access point desired to be connected to the terminal device, the terminal device cannot connect to the wireless LAN access point (for example, (See Patent Document 1.) As described above, there is an increasing number of troubles in which a terminal device user cannot connect to a wireless LAN access point by inputting an incorrect SSID due to an SSID input error.

Conventionally, when a terminal device fails to connect to a wireless LAN access point, the wireless LAN access point notifies the terminal device that the connection has failed, regardless of the cause of the connection failure, and the terminal The user of the apparatus recognized that the connection failed as an error.
JP 2004-234286 A

  Therefore, the user of the terminal device can recognize that the connection has failed, but the cause of the connection failure to the wireless LAN access point is an SSID input error by the user of the terminal device, or other causes, For example, it has not been possible to recognize whether there is no wireless LAN access point specified by the input SSID. As a result, the terminal device may not be able to quickly resolve the failure of being unable to connect to the wireless LAN access point.

  The present invention provides a case where a user of a terminal device cannot connect to a connection target (for example, a wireless LAN access point) because the connection target identifier (SSID for a wireless LAN access point) is input incorrectly. By making it possible to recognize that the cause of the connection failure to the connection target is the incorrect input of the connection target identifier, it is possible to quickly resolve the failure that prevents connection to the connection target. An object of the present invention is to provide a terminal device that can be used.

  In order to achieve the above object, a terminal device according to an embodiment of the present invention includes an input unit that inputs an identifier for specifying a connection target to be connected, and an identifier input by the input unit for the connection target. A first communication unit that transmits and attempts to connect to the connection target; and when the result of the connection attempt is unsuccessful, receives an identifier that identifies the communicable connection target from the communicable connection target The second communication unit, the calculation unit for calculating the similarity between the identifier received from the communicable connection target and the identifier for specifying the connection target input by the input unit, and the similarity and the threshold value are compared. Thus, a determination unit that determines whether or not an identifier that specifies a connection target that is input by the input unit is an input error, and an input error when the determination unit determines that the input error has occurred. That And a notification unit for notifying the user of the end device.

  In addition, the terminal device according to the embodiment of the present invention includes an input unit that inputs an identifier that specifies a connection target to be connected, and an identifier input by the input unit to the connection target, and the connection target A first communication unit that performs a connection attempt with a second communication unit that receives an identifier that identifies the communicable connection target from communicable connection targets, and a result of the connection attempt is unsuccessful Calculating the similarity between the identifier received from the communicable connection target and the identifier for identifying the connection target input by the input unit, and comparing the similarity with the threshold value to compare the input A determination unit that determines whether or not an identifier that identifies a connection target input by the unit is an input error; and when the determination unit determines that there is an input error, the use of a terminal device Notification And a that notification unit.

  A program according to an embodiment of the present invention is a program for controlling a terminal device, and includes an input function for inputting an identifier for specifying a connection target to be connected by the terminal device, and an identifier input by the input function. Is transmitted to the connection target, and when the result of the connection attempt is unsuccessful, the first communication function that attempts to connect to the connection target and the communication target that can communicate with the connection target A second communication function that receives an identifier that identifies the identifier; a calculation function that calculates a similarity between the identifier received from the communicable connection target and the identifier that identifies the connection target input by the input function; and A determination function for determining whether or not an identifier for specifying a connection target input by the input function is an input error by comparing the similarity with a threshold value and the determination function If it is determined that the miss, and a notification function of notifying the user of the terminal device to be a typo.

  A communication method according to an embodiment of the present invention is a communication method of a terminal device, the step of inputting an identifier for specifying a connection target that the terminal device tries to connect, and the identifier input by the input step An identifier for identifying the communicable connection target from communicable connection targets when the result of the connection attempt is a failure. A step of calculating a similarity between the identifier received from the communicable connection target and the identifier specifying the connection target input in the input step, and the similarity and the threshold Determining whether the identifier for identifying the connection target input by the inputting step is an input error by comparing; and In the step of constant, if it is determined that the input error, and a step of notifying that the input error to the user of the terminal device.

  According to the terminal device of the present invention, when the user of the terminal device cannot connect to the connection target due to erroneous input of the identifier to be connected, the cause of the connection failure is that the identifier has been input incorrectly. By making it possible to recognize the cause, it is possible to quickly resolve a failure that prevents connection to the connection target.

(First embodiment)
FIG. 1 is a block diagram showing a wireless communication system according to the first embodiment. FIG. 2 shows a block diagram of the terminal device 1 according to the first embodiment.

  The wireless communication system according to the present embodiment is assumed to be a wireless communication system conforming to the IEEE 802.11 standard.

  As shown in FIG. 1, the radio communication system according to the present embodiment includes a plurality of radio base stations 2 and 2 and a terminal device 1 that constitute radio networks 3 and 3. Each of the radio base stations 2 and 2 has a unique identifier. From the terminal device 1, any of the wireless base stations 2 and 2 can be a connection target.

  The radio base station 2 includes an SSID, which is an identifier for identifying the radio base station 2, in the beacon signal and periodically transmits it. Here, it is assumed that the SSID that identifies the radio base station 2 is the SSID of the network formed by the radio base station. Then, when the terminal device 1 wishes to connect to the wireless base station 2 by specifying the SSID included in the beacon signal, the wireless base station 2 connects the terminal device 1 to the wireless base station 2. It is an apparatus that connects the terminal apparatus 1 to the radio base station 2 by recognizing that it is desired and performing a predetermined procedure.

  Here, the connection means a communication relationship established between the terminal device 1 and the radio base station 2. By connecting the terminal device 1 to the radio base station 2, advanced communication between the terminal device 1 and the radio base station 2 becomes possible, such as an authentication procedure of the terminal device 1 and a service provision by the radio base station 2. .

  As shown in FIG. 2, the terminal device 1 includes an SSID input unit 101, an input SSID storage unit 102, an input SSID communication unit 103, a neighboring SSID acquisition unit 104, a neighboring SSID storage unit 105, and an SSID similarity calculation. Unit 106, SSID input error determination unit 107, and error notification unit 108.

  The SSID input unit 101 inputs the SSID (hereinafter referred to as input SSID) of the radio base station 2 that the user of the terminal device 1 desires to connect to. For example, the user of the terminal device 1 views the screen as shown in FIG. 3 and inputs the input SSID via the keyboard.

  Further, the input SSID storage unit 102 stores the input SSID input by the SSID input unit 101.

  The input SSID communication unit 103 transmits the input SSID stored in the input SSID storage unit 102 to the radio base station 2. Here, the input SSID communication unit 103 performs communication by a method according to IEEE 802.11.

  The neighboring SSID acquisition unit 104 acquires the SSID of the communicable radio base station 2 by active scanning or passive scanning. Here, the active scanning is a method in which the terminal device 1 transmits a signal including the identifier of the terminal device 1 by the neighboring SSID obtaining unit 104 and obtains a neighboring SSID described later. When receiving the signal including the identifier of the terminal device 1, the radio base station 2 transmits its own SSID to the terminal device 1. The terminal device 1 can receive the SSID (neighboring SSID) of the communicable radio base station 2 after transmitting the signal including the identifier of the terminal device 1. On the other hand, passive scanning means that the terminal device 1 receives the SSID included in the beacon signal periodically transmitted from the wireless base station 2 by the neighboring SSID acquisition unit 104, so that the SSID of the wireless base station 2 capable of communication can be obtained. Is how to get.

  Note that the input SSID communication unit 103 and the neighboring SSID acquisition unit 104 may be included in the same wireless LAN interface or in different wireless LAN interfaces.

  The neighboring SSID storage unit 105 stores the SSID of the wireless base station 2 acquired by the neighboring SSID communication unit (hereinafter referred to as a neighboring SSID).

  The SSID similarity calculation unit 106 calculates the SSID similarity between the input SSID stored in the input SSID storage unit 102 and the SSID (neighboring SSID) of the wireless base station 2 that can be communicated with the terminal device 1 stored in the neighboring SSID storage unit 105. calculate.

  Here, as the SSID similarity, the Levenshtein distance of the character string between the neighboring SSID and the input SSID is used. The Levenshtein distance is a numerical value indicating how different two character strings are. Specifically, it is the minimum number of steps required to transform one character string into another character string by inserting, deleting, or replacing characters. Therefore, the Levenshtein distance means that the smaller the value, the higher the similarity of character strings.

  The SSID input error determination unit 107 compares the SSID similarity output by the SSID similarity calculation unit 106 with a preset similarity threshold, and the SSID stored in the input SSID storage unit 102 It is determined whether or not there is an input error. For example, when the SSID similarity is the Levenstein distance, the SSID input error determination unit 107 determines that an SSID input error occurs when there is an SSID having a Levenstein distance smaller than a certain threshold among neighboring SSIDs. judge. That is, when there is a neighboring SSID of the neighboring radio base station 2 similar to the SSID entered by the user, the user inputs an incorrect input SSID with the intention of entering the neighboring SSID of the neighboring radio base station 2. This is because there is a possibility of input.

  The error notification unit 108 notifies the user of the content of the error from the determination result by the SSID input error determination unit 107. That is, when the SSID input error determination unit 107 determines that the SSID input error is an SSID input error, the error notification unit 108 notifies the SSID input error as an error content. On the other hand, when it is determined that the input error is not an SSID input error, the error notification unit 108 notifies, for example, only that there is some error or that there is no radio base station 2 corresponding to the input SSID.

  In addition, the error notification unit 108 may present the neighboring SSID similar to the input SSID to the user as an SSID correction candidate by the SSID input error determination unit 107. FIG. 4 shows an example of an error notification displayed on the screen recognized by the user when the error notification unit 108 notifies the SSID input error and the SSID correction candidate. FIGS. 5 and 6 show error notifications recognized by the user when the error notification unit 108 notifies only that the wireless base station 2 corresponding to the input SSID does not exist and is an error, respectively. An example of

  Next, an operation method of the wireless communication system according to the present embodiment will be described. FIG. 7 is a flowchart showing the operation of the terminal device 1.

  First, the SSID input unit 101 inputs the SSID (input SSID) of the radio base station 2 that the user of the terminal device 1 desires to connect (S101).

  Next, the input SSID communication unit 103 transmits a signal including the SSID and tries to connect to the communicable radio base station 2 (S102). The communicable radio base station 2 receives the signal and determines whether the input SSID and the SSID of the radio base station 2 match. The radio base station 2 determined to match transmits a signal including information indicating matching to the terminal device 1. On the other hand, the radio base station 2 that has determined that they do not match transmits a signal including a mismatch to the terminal device 1 or does not transmit a signal.

  When the terminal device 1 receives a signal including matching information (S103), the terminal device 1 then connects to the radio base station 2 by performing a predetermined procedure (S104).

  On the other hand, when a signal including matching information is not received (S103), the neighboring SSID acquisition unit 104 of the terminal device 1 performs scanning to perform the SSID (neighboring SSID) of the communicable radio base station 2 by scanning. ) Is acquired (S105). The neighborhood SSID storage unit 105 stores the obtained neighborhood SSID.

  Next, the SSID similarity calculation part 106 of the terminal device 1 calculates | requires the Levenshtein distance of an input SSID, neighboring SSID, and each character string (S106).

  Next, the SSID input error determination unit 107 compares a predetermined threshold of the Levenshtein distance set in advance with the Levenstein distance obtained by the SSID similarity calculation unit, and determines whether or not the input SSID is an input error. Is determined (S107).

  The error notification unit 108 notifies the determination result based on the determination of the input error determination unit. When it is determined that the input SSID is an input error, the SSID error content is notified to the user of the terminal device 1 as an SSID correction candidate that the SSID error content is lower than the Levenshtein distance threshold. (S108). On the other hand, when it is determined that the input SSID is not an input error, the error notification unit 108 notifies that there is no radio base station 2 corresponding to the input SSID (S109).

  As described above, according to the terminal device 1 according to the present embodiment, it is not possible to connect to the radio base station 2 because the user of the terminal device 1 erroneously inputs the SSID of the radio base station 2 that the user desires to connect to. In this case, the user of the terminal device 1 can recognize that the cause of the connection failure to the radio base station 2 is that the SSID is input by mistake, and can further acquire an SSID correction candidate. it can. As a result, the user of the terminal device 1 can quickly eliminate the connection failure to the radio base station 2 by re-inputting the SSID.

  The terminal device 1 can also be realized by using, for example, a general-purpose computer device as basic hardware. That is, the SSID input unit 101, the input SSID storage unit 102, the input SSID communication unit 103, the neighboring SSID acquisition unit 104, the neighboring SSID storage unit 105, the SSID similarity calculation unit 106, and the SSID input error determination unit 107 and the error notification unit 108 can be realized by causing a processor mounted on the computer apparatus to execute a program. At this time, the terminal device 1 may be realized by installing the above program in a computer device in advance, or may be stored in a storage medium such as a CD-ROM or via the network 3. This program may be distributed and this program may be installed on a computer device as appropriate. Further, the input SSID storage unit 102 and the neighboring SSID storage unit 105 include a memory, a hard disk or a storage medium such as a CD-R, a CD-RW, a DVD-RAM, a DVD-R, etc. incorporated in or externally attached to the computer device. Can be realized by appropriately using.

  Further, in the present embodiment, after the connection to the radio base station 2 fails, the neighboring SSID acquisition unit 104 of the terminal device 1 performs scanning so that the SSID (neighboring SSID) of the communicable radio base station 2 can be obtained. The SSID similarity calculation unit 106 compares the neighboring SSID and the input SSID, and calculates the similarity. However, the SSID similarity calculation unit 106 may calculate the similarity using, for example, the neighborhood SSID acquired in advance from the connection trial to the radio base station 2 and stored in the neighborhood SSID storage unit 105. .

In this embodiment, when the SSID input error determination unit 107 determines that the cause of the failure to connect to the radio base station 2 is an SSID input error, the error notification unit 108 is an input error. However, for example, when there is one SSID as a correction candidate, the SSID is automatically registered in the input SSID and specified by the SSID. A connection attempt to the radio base station 2 may be performed.
In this embodiment, the case where the wireless communication system is a wireless communication system conforming to the IEEE 802.11 standard has been described. However, the wireless communication system is not limited to a case where the wireless communication system is a wireless communication system conforming to the IEEE 802.11 standard.

(Second Embodiment)
Next, the terminal device 200 according to the second embodiment will be described.

  In the second embodiment, the connection target of the terminal device 200 is a resource on the network, the identifier specifying the resource on the network is a NETBIOS name, and the communication unit of the terminal device 200 is The point of being NETBIOS is different from the first embodiment.

  FIG. 8 shows a block diagram of a terminal device 200 according to the second embodiment.

  The communication system according to the present embodiment includes resources on the network (corresponding to connection targets in claim 1), a WINS server that manages the NETBIOS name of the resources on the network, and the terminal device 200.

The resource on the network is a computer or the like on the network to which the terminal device 200 is connected. For example, there are printers as resources on the network. A resource on the network is specified by a NETBIOS name that is an identifier of the resource. When the terminal device 200 having the NETBIOS name desires connection to a resource, the terminal device 200 is connected to the resource by performing a predetermined procedure.

  Here, the connection means a communication relationship established between the terminal device 200 and a resource on the network. By connecting the terminal device 200 to a resource on the network, the terminal device 200 can perform advanced communication with the resource on the network, such as providing a service by the resource on the network. Here, when the resource on the network is a printer, the service by the resource on the network is to print out the information output from the terminal device 200.

  The WINS server is a device that manages the NETBIOS names of resources on the network.

  As shown in FIG. 8, the terminal device 200 includes a NETBIOS name input unit 201, an input NETBIOS name storage unit 202, an input NETBIOS communication unit 203, an acquirable NETBIOS name acquisition unit 204, and an acquirable NETBIOS name storage. Unit 205, NETBIOS name similarity calculation unit 206, NETBIOS name input error determination unit 207, and error notification unit 208.

  The input NETBIOS communication unit 203 transmits the NETBIOS name stored in the input NETBIOS name storage unit 202 on the network to which the terminal device 200 is connected.

  An acquirable NETBIOS name acquisition unit 204 acquires the NETBIOS name of a resource on the network managed by the WINS server by accessing the WINS server.

  Other components of the terminal device 200, that is, a NETBIOS name input unit 201, an input NETBIOS name storage unit 202, an obtainable NETBIOS name storage unit 205, a NETBIOS name similarity calculation unit 206, and a NETBIOS name input error determination unit 207 The error notification unit 208 includes an SSID input unit 101, an input SSID storage unit 102, a neighboring SSID storage unit 105, an SSID similarity calculation unit, and an SSID input error determination, which are components of the terminal device 200 of the first embodiment. Unit 107 has the same function as the error notification unit 208 and can be described by replacing the SSID with the NETBIOS name, and thus the description is omitted.

  Next, an operation method of the communication system including the terminal device 200 according to the present embodiment will be described.

  First, the NETBIOS name input unit 201 inputs a NETBIOS name (hereinafter referred to as an input NETBIOS name) of a resource on the network that the user of the terminal device 200 desires to connect to.

  Next, the input NETBIOS communication unit 203 transmits a signal including the input NETBIOS name to the network to which the terminal device 200 is connected, and accesses resources on the network. The resource on the network receives the signal and determines whether the input NETBIOS name matches the NETBIOS name of the resource. The resource determined to match transmits a signal including information indicating matching to the terminal device 200. On the other hand, a resource that is determined not to match transmits a signal that does not match to the terminal device 200, or does not transmit a signal.

  When the terminal apparatus 200 receives a signal including matching information, the terminal apparatus 200 then connects to a resource on the network by performing a predetermined procedure, and implements a service provided by the resource.

  On the other hand, if a signal including matching information is not received, the NETBIOS name acquisition unit 204 that can be acquired by the terminal device 200 accesses the WINS server to acquire the NETBIOS name managed by the WINS server (acquisable NETBIOS name). The obtainable NETBIOS name storage unit 205 stores the obtained obtainable NETBIOS name.

  The subsequent operation method of the terminal device 200 is the same as that in the operation method of the terminal device 200 of the first embodiment, except that the input SSID is replaced with a NETBIOS name and a neighboring SSID is replaced with a NETBIOS name that can be acquired. Since it can be described in the same manner as the operation of the terminal device 200 of the embodiment, the description is omitted.

  Through the subsequent process, the user of the terminal device 200 can specify whether the cause of the failure to connect to the resource on the network is an input error of the NETBIOS name or other causes. Further, when the input error is a NETBIOS name, a NETBIOS name similar to the input NETBIOS name can be acquired. As a result, the user of the terminal device 200 can quickly resolve a connection failure on the network by inputting the NETBIOS name again.

  Note that the present invention is not limited to the first embodiment and the second embodiment as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage.

  For example, in the first embodiment, a wireless interface unit (input SSID communication unit 103, neighboring SSID acquisition unit 104) is used as a communication unit, and in the second embodiment, a NETBIOS communication unit (input NETBIOS communication unit). 203, the NETBIOS name acquisition unit 204) that can be acquired is used, but the communication unit is not limited thereto. For example, a wired interface unit may be used.

  In the first embodiment, the connection target of the terminal device 200 is a wireless base station whose identifier is SSID, and in the second embodiment, the resource is a network resource whose identifier is a NETBIOS name. Is not limited to these. Further, the identifier is not limited to the SSID and the NETBIOS name.

  Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the first embodiment and the second embodiment. For example, some components may be deleted from all the components shown in the first embodiment and the second embodiment. Furthermore, you may combine suitably the component over 1st Embodiment and 2nd Embodiment.

1 is a block diagram showing a wireless communication system according to a first embodiment. The block diagram of the terminal device which concerns on 1st Embodiment. The figure which shows the example of the input screen at the time of the SSID input of the terminal device which concerns on 1st Embodiment. The figure which shows the example of an output screen in case the error notification part of the terminal device which concerns on 1st Embodiment notifies that it is a SSID input mistake and the correction candidate of SSID. The figure which shows the example of an output screen in case the error notification part of the terminal device which concerns on 1st Embodiment notifies that a radio base station does not exist. The figure which shows the example of an output screen in case the error notification part of the terminal device which concerns on 1st Embodiment notifies only that it is an error. The figure which shows the operation | movement flow of the terminal device which concerns on 1st Embodiment. The block diagram of the terminal device which concerns on 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 200 ... Terminal device 2 ... Wireless base station 3 ... Network 101 ... SSID input part 102 ... Input SSID memory | storage part 103 ... Input SSID communication part 104 ... Neighbor SSID acquisition Unit 105 ... Neighborhood SSID storage unit 106 ... SSID similarity calculation unit 107 ... SSID input error determination unit 108, 208 ... Error notification unit 201 ... NETBIOS name input unit 202 ... input NETBIOS name storage unit 203 ... input NETBIOS name communication unit 204 ... acquisable NETBIOS name acquisition unit 205 ... acquisable NETBIOS name storage unit 206 ... NETBIOS name similarity calculation unit 207 ... NETBIOS Name input error determination part

Claims (9)

An input unit for inputting an identifier for identifying a connection target to be connected;
A first communication unit that transmits an identifier input by the input unit to the connection target and makes a connection attempt with the connection target;
A second communication unit that receives an identifier for identifying the communicable connection target from communicable connection targets when the result of the connection attempt is a failure;
A calculation unit for calculating a similarity between an identifier received from the communicable connection target and an identifier for specifying the connection target input by the input unit;
A determination unit that determines whether or not an identifier for specifying a connection target input by the input unit is an input error by comparing the similarity and a threshold;
A terminal device comprising: a notification unit that notifies a user of a terminal device that an input error has occurred when the determination unit determines that an input error has occurred. An input unit for inputting an identifier for identifying a connection target to be connected;
A first communication unit that transmits an identifier input by the input unit to the connection target and makes a connection attempt with the connection target;
A second communication unit that receives an identifier for identifying the communicable connection target from the communicable connection target;
A calculation unit that calculates a similarity between an identifier received from the communicable connection target and an identifier that identifies the connection target input by the input unit when the result of the connection attempt is unsuccessful;
A determination unit that determines whether or not an identifier for specifying a connection target input by the input unit is an input error by comparing the similarity and a threshold;
A terminal device comprising: a notification unit that notifies a user of a terminal device that an input error has occurred when the determination unit determines that an input error has occurred. The determination unit is similar to the identifier input by the input unit from among the identifiers specifying the communicable connection targets received by the second communication unit by comparing the similarity and a threshold value. Seeking a unique identifier,
The terminal device according to claim 1, wherein the notification unit notifies the similar identifier.   The terminal device according to claim 1, wherein the calculation unit calculates the similarity using a Levenshtein distance of a character string of the identifier. The connection target is a radio base station,
The first communication unit is a first wireless interface;
The terminal device according to claim 1, wherein the second communication unit is a second wireless interface. The wireless base station is a wireless base station of a wireless network of the IEEE 802.11 standard;
The terminal device according to any one of claims 1 to 5, wherein the identifier is an SSID. The connection target is a resource on the network to which the terminal device is connected,
The first communication unit is a NetBIOS communication unit;
The second communication unit is an identifier acquisition unit of an available resource;
The terminal device according to any one of claims 1 to 4, wherein the identifier is a NETBIOS name. A program for controlling a terminal device,
An input function for inputting an identifier for identifying a connection target to be connected by the terminal device;
A first communication function for transmitting an identifier input by the input function to the connection target and performing a connection attempt with the connection target;
A second communication function for receiving an identifier for identifying the communicable connection target from communicable connection targets when the result of the connection attempt is unsuccessful;
A calculation function for calculating the similarity between the identifier received from the communicable connection target and the identifier for specifying the connection target input by the input function;
A determination function for determining whether or not an identifier for specifying a connection target input by the input function is an input error by comparing the similarity and a threshold;
A program having a notification function for notifying a user of the terminal device of an input error when the determination function is determined to be an input error. A communication method for a terminal device,
Inputting an identifier for identifying a connection target to which the terminal device attempts to connect;
Transmitting the identifier input in the inputting step to the connection target, and attempting to connect to the connection target;
Receiving an identifier that identifies the communicable connection target from communicable connection targets when the result of the connection attempt is unsuccessful; and
A step of calculating a similarity between the identifier received from the communicable connection target and the identifier for specifying the connection target input in the input step;
Determining whether the identifier specifying the connection target input by the inputting step is an input error by comparing the similarity and a threshold;
And a step of notifying the user of the terminal device of an input error when it is determined in the determining step that an input error has occurred.

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