JP5318259B1 - Terminal device and connection method thereof - Google Patents

Abstract

An object of the present invention is to provide a portable terminal capable of suppressing the upper limit of the time required for one process for performing a plurality of communications, and a connection method thereof.
A portable terminal (2) according to the present invention is a portable terminal that can be connected to a server (8) via a wireless LAN access point (3) and at least one gateway (4). And a communication unit (21) that communicates with the gateway, a processing unit (251) that establishes a communication path in the gateway by performing communication with the gateway a plurality of times, and a timing unit (252) that measures time. And the processing unit starts timing by the timing unit at the start of communication with the gateway, and determines that a predetermined timeout period has elapsed based on the timing by the timing unit before establishing the communication path in the gateway Disconnect the connection to the access point.
[Selection] Figure 2

Description

  The present invention relates to a terminal device and a connection method thereof.

  In recent years, standard installation of a wireless LAN (Local Area Network) communication function has been progressing in various portable terminals such as personal computers, mobile phones, portable game machines, and the like (see, for example, Patent Document 1).

  When a portable terminal is connected to a backbone network via an access point and is further connected to the Internet or the like via a gateway, the portable terminal is used in the IEEE (Institute of Electrical and Electronics Engineers) 802.11 standard wireless communication system. A predetermined procedure called association is performed between the access point and the access point, and it is specified that the access point is identified as the presence of the mobile terminal.

  Further, a procedure called authentication (for example, web authentication) is performed between the mobile terminal and the gateway, and it is also common for the gateway to identify the user and connect only the user's mobile terminal to the Internet or the like. is there.

  FIG. 9 is a diagram illustrating an example of a procedure in which the mobile terminal establishes an association (connection) with the access point and performs web authentication with the gateway.

  The portable terminal broadcasts a probe request including an ESSID (Extended Service Set Identifier) that it wants to connect to (step S900).

  If the ESSID included in the probe request is the same as its own ESSID, the access point returns a probe response (step S902). The probe response includes parameters such as BSSID (Basic Service Set Identifier), encryption method, authentication method, and communication speed.

  The portable terminal transmits an authentication request to the access point (step S904).

  The access point determines whether to authenticate the mobile terminal using a predetermined algorithm, and returns an authentication response including the result (step S906). In general, authentication is performed using a MAC (Media Access Control) address of a mobile terminal as an identifier.

  Upon confirming that the mobile terminal has been authenticated by the access point, the mobile terminal transmits an association request to the access point (step S908). The association request includes parameters such as ESSID, support rate, necessity of using polling, and the like.

  When the access point confirms that all the parameters included in the association request correspond to itself with the authenticated MAC address, the access point returns an association response (step S910).

  Through the above procedure, the mobile terminal can connect to the backbone network via the access point and transmit a data frame. However, since the user has not been authenticated by the gateway at this time, the mobile terminal cannot connect to the Internet or the like via the gateway. On the other hand, if the mobile terminal is also connected to the mobile phone network, the connection with the mobile phone network is disconnected at this point.

  The portable terminal transmits a page acquisition request including the URL (Uniform Resource Locator) of the login page to the gateway (step S912).

  The gateway returns a page corresponding to the URL included in the page acquisition request, that is, a login page (step S914).

  The portable terminal transmits an authentication request to the gateway (step S916). The authentication request includes parameters such as a user identification number (ID) and a password. These data are automatically acquired from a setting file or the like.

  The gateway transfers the authentication request to the authentication server (step S918).

  The authentication server determines whether or not to authenticate the user based on the ID and password included in the authentication request, and returns an authentication response including the result (step S920).

  The gateway transfers the authentication response to the mobile terminal (step S922).

  With the above procedure, when the user is authenticated by the gateway, the portable terminal can connect to the Internet or the like via the gateway and transmit a connection request to the server (step S924).

JP 2011-259159 A JP 2010-187070 A JP 2008-098804 A

  In general, data processing, communication, and the like have a mechanism called timeout. For example, when a time required for data processing or communication exceeds a predetermined time (hereinafter referred to as “timeout time”) due to, for example, no response from the server, the data processing or communication is forcibly performed. This is a mechanism for releasing resources such as a CPU (Central Processing Unit) and a network that have been completed and occupied. In general, the time required for data processing, communication, etc. is measured from the time when the data processing, communication, etc. is requested until a response is received. For example, timeouts are also introduced in protocols such as a transport layer and an application layer in a TCP (Transmission Control Protocol) / IP (Internet Protocol) protocol stack (see, for example, Patent Documents 2 and 3).

  However, since the time required for data processing, communication, and the like varies depending on the processing capacity of the server, the communication capacity of the network, and the like, in general, the timeout time is set with some margin. Therefore, depending on the processing capability of the server, communication capability of the network, etc., the user takes a long time from requesting data processing, communication, etc. until a response is received, or until processing, communication, etc. of the data times out. May be kept waiting.

  The effect of communication that is performed multiple times before completing one process, such as connection process and transaction process, is significant. For example, assuming that communication is performed n times until one process is completed, and the timeout time related to the time required for one communication is t minutes, the user can wait for n × t minutes in the worst case. It will be. Therefore, with the conventional timeout mechanism, the convenience of the user may be greatly impaired.

  The present invention has been made in order to solve such a conventional problem, and provides a portable terminal and a connection method thereof capable of suppressing the upper limit of the time required for one process for performing a plurality of communications. For the purpose.

  A portable terminal according to the present invention is a portable terminal connectable to a server via a wireless LAN access point and at least one gateway, a communication unit that communicates with the access point and the gateway, and communication with the gateway a plurality of times By having a processing unit that establishes a communication path in the gateway and a time measuring unit that measures time, the processing unit starts measuring time by the time measuring unit at the start of communication with the gateway. If it is determined that a predetermined timeout period has elapsed based on the time measured by the time measuring unit before the communication path is established, the connection with the access point is disconnected.

  In the mobile terminal according to the present invention, it is preferable that the predetermined timeout period is set according to a network to which a connected access point belongs.

  The connection method according to the present invention is a connection method in a portable terminal that can be connected to a server via a wireless LAN access point and at least one gateway, and the portable terminal starts communication with the gateway, , Start timing by the timing unit, establish a communication path at the gateway by communicating with the gateway multiple times, and a predetermined timeout period elapses based on the timing by the timing unit before establishing the communication path at the gateway If it is determined that the connection has been made, the connection with the access point is disconnected.

  The portable terminal and the connection method thereof according to the present invention cumulatively time the time required for a plurality of times of communication, and perform a plurality of times of communication when a predetermined time-out period elapses before the end of the plurality of times of communication. By forcibly ending, it is possible to suppress the upper limit of the time required for one process.

It is a figure which shows an example of schematic structure of a wireless LAN communication system. It is a figure which shows an example of schematic structure of a portable terminal. It is a figure which shows an example of the operation | movement sequence of a wireless LAN communication system when a connection with an access point is successful. It is a figure which shows an example of the operation | movement sequence of a wireless LAN communication system when the connection with an access point fails. It is a figure which shows an example of the operation | movement sequence of a wireless LAN communication system when the authentication by a gateway is successful. It is a figure which shows an example of the operation | movement sequence of a wireless LAN communication system when the authentication by a gateway fails. It is a figure which shows an example of schematic structure of a portable terminal. It is a figure which shows an example of the operation | movement sequence of a wireless LAN communication system when the authentication by a gateway is successful. It is a figure which shows an example of the procedure which a portable terminal establishes association with an access point, and also performs web authentication between gateways.

  Hereinafter, various embodiments of the present invention will be described with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to these embodiments, and extends to the invention described in the claims and equivalents thereof.

(First embodiment)
In the present embodiment, the mobile terminal is connected to the Internet via a wireless LAN. In the process, the mobile terminal communicates with the access point and the gateway a plurality of times until the connection is completed. Then, a timeout time is set for the time required for a plurality of times of communication, and when the timeout time elapses, the mobile terminal disconnects from the connected or connected access point.

  FIG. 1 is a diagram illustrating an example of a schematic configuration of a wireless LAN communication system 1.

  The wireless LAN communication system 1 includes a portable terminal 2 having a wireless LAN communication function and a wireless LAN access point 3. The portable terminal 2 can perform wireless communication with the access point 3 within the service area.

  The access point 3 is connected to the backbone network 4. A gateway 5 that relays the backbone network 4 and the Internet 7 and an authentication server 6 that authenticates a user are connected to the backbone network 4 by a wired LAN such as Ethernet (registered trademark).

  When the user is authenticated by the authentication server 6 via the gateway 5, the mobile terminal 2 can connect to the Internet 7 via the gateway 5. Therefore, the mobile terminal 2 can perform information communication with the server 8 connected to the Internet 7.

  FIG. 2 is a diagram illustrating an example of a schematic configuration of the mobile terminal 2.

  The mobile terminal 2 is connected to the server 8 via the access point 3, the backbone network 4, the gateway 5, and the Internet 7, and performs information communication with the server 8. For this purpose, the mobile terminal 2 includes a communication unit 21, a storage unit 22, an operation unit 23, a display unit 24, and a processing unit 25.

  The communication unit 21 includes a communication interface circuit including an antenna whose sensitivity band is a 2.4 GHz band used in the wireless communication scheme of the IEEE 802.11 standard, and connects the mobile terminal 2 to the backbone network 4. The communication unit 21 establishes a wireless communication line using the IEEE 802.11 standard wireless communication system with the access point 3 and performs information communication with the access point 3. Then, the communication unit 21 delivers the data received from the access point 3 to the processing unit 25. Further, the communication unit 21 transmits the data received from the processing unit 25 to the access point 3.

  The storage unit 22 includes, for example, at least one of a semiconductor memory, a magnetic disk device, and an optical disk device. The storage unit 22 stores a driver program, an operating system program, an application program, data, and the like used for processing in the processing unit 25. For example, the storage unit 22 stores, as a driver program, a communication driver program that executes an IEEE 802.11 standard wireless communication method, an input device driver program that controls the operation unit 23, an output device driver program that controls the display unit 24, and the like. To do. In addition, the storage unit 22 stores, as an operating system program, a connection control program that performs authentication and the like in the wireless communication scheme of the IEEE 802.11 standard. The storage unit 22 stores, as application programs, an authentication program that performs web authentication, a time measurement program that measures time, a web browser program that acquires and displays a web page, an e-mail program that transmits and receives e-mail, and the like. . In addition, the storage unit 22 requires as data a list including the ESSID of the network to be connected, the BSSID of the connected or connected access point 3 and the corresponding ESSID, the user ID and password, and communication with the access point 3. A time-out time related to time, a time-out time related to time required for communication with the gateway 5, video data, image data, and the like are stored. Furthermore, the storage unit 22 may temporarily store temporary data related to a predetermined process.

  The operation unit 23 may be any device as long as the operation of the mobile terminal 2 is possible, for example, a touch pad, a keyboard, or the like. The user can input letters, numbers, and the like using this device. When operated by the user, the operation unit 23 generates a signal corresponding to the operation. The generated signal is input to the processing unit 25 as a user instruction.

  The display unit 24 may be any device that can display images, images, and the like, such as a liquid crystal display and an organic EL (Electro-Luminescence) display. The display unit 24 displays a video corresponding to the video data supplied from the processing unit 25, an image corresponding to the image data, and the like.

  The processing unit 25 has one or a plurality of processors and their peripheral circuits. The processing unit 25 comprehensively controls the overall operation of the mobile terminal 2, and is, for example, a CPU (Central Processing Unit). That is, the processing unit 25 includes the communication unit 21, the display unit, and the display unit so that various processes of the portable terminal 2 are executed in an appropriate procedure according to a program stored in the storage unit 22, an operation of the operation unit 23, and the like. The operation of 24 etc. is controlled. The processing unit 25 executes processing based on programs (driver program, operating system program, application program, etc.) stored in the storage unit 22. The processing unit 25 can execute a plurality of programs (such as application programs) in parallel.

  The processing unit 25 includes an authentication unit 251, a timing unit 252, an operating system 253, a connection control unit 254, and a communication driver 255. Each of these units included in the processing unit 25 is a functional module implemented by a program executed on a processor included in the processing unit 25. Or these each part which the process part 25 has may be mounted in the portable terminal 2 as firmware.

  The authentication unit 251 performs web authentication with the gateway 5. In addition, the authentication unit 251 instructs the timing unit 252 to start and end timing. Further, the authentication unit 251 requests the connection control unit 254 to disconnect the connection with the access point 3. Details of the process will be described later.

  The time measuring unit 252 measures time. That is, the time counting unit 252 resets the clock to start timing when instructed to start timing using the predetermined time as an argument, and ends timing when instructed to end timing. In addition, when a predetermined time given as an argument elapses before the timing unit 252 is instructed to end timing, the timer unit 252 notifies the authentication unit 251 to that effect.

  The operating system 253 realizes basic functions commonly used by applications and controls the entire mobile terminal 2, and is, for example, Android (registered trademark) OS, iOS (registered trademark), or the like. In addition, the operating system 253 relays notifications such as a connection state (connection start, connection completion, etc.), a disconnection request, and the like with the access point 3 between the authentication unit 251 and the connection control unit 254.

  The connection control unit 254 performs authentication or the like in the wireless communication scheme of the IEEE 802.11 standard. In addition, the connection control unit 254 notifies the authentication unit 251 of the connection state with the access point 3. Further, the connection control unit 254 requests the communication driver 255 to disconnect the connection with the access point 3. Details of the process will be described later.

  The communication driver 255 executes an IEEE 802.11 standard wireless communication system.

  Hereinafter, processing by the connection control unit 254 will be described.

  When it is detected that the connection to the wireless LAN is turned on, the connection control unit 254 refers to the list stored in the storage unit 22, acquires one ESSID of the network to be connected, and communicates with the communication driver. The probe request including the ESSID is broadcast via 255.

  If a probe response is not received from the access point 3 via the communication driver 255, the connection control unit 254 refers to the list stored in the storage unit 22, acquires one other ESSID, and transmits the communication driver 255. Broadcast a probe request including the ESSID. On the other hand, when receiving a probe response from the access point 3 via the communication driver 255, the connection control unit 254 stores the BSSID included in the probe response and the corresponding ESSID in the storage unit 22. Further, the connection control unit 254 transmits an authentication request to the access point 3 via the communication driver 255. Further, the connection control unit 254 notifies the authentication unit 251 that the connection with the access point 3 has been started via the operating system 253.

  When receiving an authentication response from the access point 3 via the communication driver 255, the connection control unit 254 confirms that the access point 3 has been authenticated, and then sends an association request to the access point 3 via the communication driver 255. Send. When the association response is received from the access point 3 via the communication driver 255, the connection control unit 254 notifies the authentication unit 251 that the connection with the access point 3 is completed via the operating system 253. .

  When the authentication unit 251 requests disconnection of the connected or connected access point 3 via the operating system 253, the connection control unit 254 connects the communication driver 255 to the access point 3. Request disconnection.

  Hereinafter, processing by the authentication unit 251 will be described.

  When the connection control unit 254 notifies that the connection with the access point 3 is started via the operating system 253, the authentication unit 251 determines the time required for communication with the access point 3 from the storage unit 22. The time-out time is acquired, and the time-measurement unit 252 is instructed to start time-measurement using the time-out time as an argument.

  When the time measuring unit 252 notifies that the timeout time given as an argument has elapsed, the authentication unit 251 notifies the connection control unit 254 of the connection with the connected access point 3 via the operating system 253. Request to disconnect.

  When the connection control unit 254 notifies that the connection with the access point 3 is completed via the operating system 253, the authentication unit 251 instructs the time measuring unit 252 to end the time measurement. In addition, the authentication unit 251 transmits a page acquisition request to the gateway 5 via the communication driver 255. Further, the authentication unit 251 acquires a timeout time related to the time required for communication with the gateway 5 from the storage unit 22, and instructs the timing unit 252 to start timing using the timeout time as an argument.

  When the time measuring unit 252 notifies that the timeout time given as an argument has elapsed, the authentication unit 251 notifies the connection control unit 254 of the connection with the connected access point 3 via the operating system 253. Request to disconnect.

  When the login page is received from the gateway 5 via the communication driver 255, the authentication unit 251 acquires the user ID and password from the storage unit 22, and sends an authentication request including the ID and password via the communication driver 255. To the gateway 5. When receiving an authentication response from the gateway 5 via the communication driver 255, the authentication unit 251 instructs the time measuring unit 252 to end the time measurement regardless of whether the user is authenticated by the gateway 5.

  FIG. 3 is a diagram illustrating an example of an operation sequence of the wireless LAN communication system 1 when the connection with the access point 3 is successful. The operation sequence described below cooperates with each element of the mobile terminal 2, the access point 3, and the gateway 5 mainly by the processing unit 25 based on a program stored in advance in the storage unit 22 or the like. And executed.

  When it is detected that the connection to the wireless LAN is turned on, the connection control unit 254 refers to the list stored in the storage unit 22, acquires one ESSID of the network to be connected, and communicates with the communication driver. A probe request including the ESSID is broadcast via 255 (step S900).

  When receiving the probe request from the portable terminal 2, if the ESSID included in the probe request is the same as its own ESSID, the access point 3 returns a probe response to the portable terminal 2 (step S902).

  If no probe response is received from the access point 3 via the communication driver 255, the connection control unit 254 acquires one other ESSID from the storage unit 22 and includes the ESSID via the communication driver 255. Broadcast a probe request. On the other hand, when receiving a probe response from the access point 3 via the communication driver 255, the connection control unit 254 stores the BSSID included in the probe response and the corresponding ESSID in the storage unit 22. Further, the connection control unit 254 transmits an authentication request to the access point 3 via the communication driver 255 (step S904).

  The connection control unit 254 notifies the authentication unit 251 that the connection with the access point 3 has been started via the operating system 253 (step S300).

  When the connection control unit 254 notifies that the connection with the access point 3 is started via the operating system 253, the authentication unit 251 determines the time required for communication with the access point 3 from the storage unit 22. The time-out time is acquired, and the time-measurement unit 252 is instructed to start the time-measurement using the time-out time as an argument (step S302).

  When receiving the authentication request from the mobile terminal 2, the access point 3 determines whether to authenticate the mobile terminal 2 using a predetermined algorithm, and returns an authentication response including the result to the mobile terminal 2 (step) S906).

  When receiving an authentication response from the access point 3 via the communication driver 255, the connection control unit 254 confirms that the access point 3 has been authenticated, and then sends an association request to the access point 3 via the communication driver 255. Transmit (step S908).

  Upon receiving the association request from the mobile terminal 2, the access point 3 is an authenticated MAC address, and after confirming that all parameters included in the association request correspond to itself, the access point 3 sends an association response to the mobile terminal 2. A reply is made (step S910).

  When the association response is received from the access point 3 via the communication driver 255, the connection control unit 254 notifies the authentication unit 251 that the connection with the access point 3 has been completed via the operating system 253 (steps). S304).

  When the connection control unit 254 notifies that the connection with the access point 3 is completed via the operating system 253, the authentication unit 251 instructs the time measuring unit 252 to end the time measurement (step S306).

  FIG. 4 is a diagram illustrating an example of an operation sequence of the wireless LAN communication system 1 when the connection with the access point 3 fails. In this operation sequence, steps S900 to S904, 300, and 302 are the same as those shown in FIG.

  When the time measuring unit 252 notifies that the timeout time given as an argument has elapsed (step S308-Yes), the authenticating unit 251 accesses the connection control unit 254 via the operating system 253 during the connection. Request to disconnect the connection with the point 3 (step S310).

  When the authentication unit 251 requests the connection with the access point 3 being connected to be disconnected via the operating system 253, the connection control unit 254 causes the communication driver 255 to disconnect the connection with the access point 3. A request is made (step S312).

  FIG. 5 is a diagram illustrating an example of an operation sequence of the wireless LAN communication system 1 when authentication by the gateway 5 is successful. In this operation sequence, steps S900 to 910 and 300 to 306 are the same as those shown in FIG.

  The authentication unit 251 transmits a page acquisition request to the gateway 5 via the communication driver 255 (step S912).

  The authentication unit 251 acquires the timeout time related to the time required for communication with the gateway 5 from the storage unit 22, and instructs the timing unit 252 to start timing using the timeout time as an argument (step S316).

  When receiving the page acquisition request from the mobile terminal 2, the gateway 5 returns a page corresponding to the URL included in the page acquisition request, that is, a login page, to the mobile terminal 2 (step S914).

  When the login page is received from the gateway 5 via the communication driver 255, the authentication unit 251 acquires the user ID and password from the storage unit 22, and sends an authentication request including the ID and password via the communication driver 255. And transmitted to the gateway 5 (step S916).

  When receiving the authentication request from the mobile terminal 2, the gateway 5 transfers the authentication request to the authentication server 6, and when receiving the authentication response from the authentication server 6, the gateway 5 transfers the authentication response to the mobile terminal 2 (step S922). ).

  When receiving the authentication response from the gateway 5 via the communication driver 255, the authentication unit 251 instructs the time measuring unit 252 to end the time measurement regardless of whether or not the user is authenticated by the gateway 5 (step S318). .

  FIG. 6 is a diagram illustrating an example of an operation sequence of the wireless LAN communication system 1 when authentication by the gateway 5 fails. In this operation sequence, steps S900 to 912, 300 to 306, and 316 are the same as those shown in FIGS.

  When the time measuring unit 252 notifies that the timeout time given as an argument has elapsed (step S320—Yes), the authentication unit 251 accesses the connection control unit 254 via the operating system 253 to the connected access. Request for disconnection from the point 3 is made (step S322).

  When the authentication unit 251 requests disconnection of the connected access point 3 via the operating system 253, the connection control unit 254 causes the communication driver 255 to disconnect the connection to the access point 3. A request is made (step S324).

  As described above, the time required for a plurality of times of communication is cumulatively counted, and if a predetermined time-out period elapses before the end of the plurality of times of communication, the plurality of times of communication are forcibly ended. As a result, the upper limit of the time required for one process can be suppressed.

(Second Embodiment)
In the first embodiment, the same timeout time is set for the time required for communication with the gateway 5 regardless of the network (ESSID). However, the time required for communication with the gateway 5 is generally different depending on the network. Therefore, in this embodiment, a different timeout time is set depending on the network.

  FIG. 7 is a diagram illustrating an example of a schematic configuration of the mobile terminal 2 ′. In this schematic configuration, the communication unit 21, the operation unit 23, the display unit 24, the timing unit 252, the operating system 253, the connection control unit 254, and the communication driver 255 are the same as those shown in FIG. Therefore, the description is omitted below.

  In addition to what is stored in the storage unit 22 shown in FIG. 2, the storage unit 22 ′ stores, as data, a table or the like indicating the correspondence between the BSSID of the connection target network and the timeout time.

  In addition to the processing executed by the authentication unit 251 shown in FIG. 2, the authentication unit 251 'executes processing for setting a different timeout time depending on the network. That is, after transmitting a page acquisition request to the gateway 5 via the communication driver 255, the authentication unit 251 ′ acquires the ESSID of the connected network from the storage unit 22 ′, and uses the ESSID as a key to store the storage unit. Referring to the table stored in 22 ', the corresponding timeout time is acquired. In addition, the authentication unit 251 ′ instructs the timing unit 252 to start timing using the timeout time as an argument.

  FIG. 8 is a diagram illustrating an example of an operation sequence of the wireless LAN communication system 1 ′ when authentication by the gateway 5 is successful. In this operation sequence, steps S900 to 922, 300 to 306, and 318 are the same as those shown in FIGS.

  The authentication unit 251 ′ acquires the ESSID of the connected network from the storage unit 22 ′, refers to the table stored in the storage unit 22 ′ using the ESSID as a key, and acquires the corresponding timeout time. In addition, the authentication unit 251 'instructs the timing unit 252 to start timing using the timeout time as an argument (step S800).

  As described above, the upper limit of the time required for one process can be more appropriately suppressed by setting the predetermined timeout time according to the network.

  In addition, this invention is not limited to the above embodiment. For example, in the first embodiment, only one gateway exists, but a plurality of gateways may exist. By applying the present invention to each gateway, it becomes possible to suppress the upper limit of the time required for communication with each gateway, and as a result, to suppress the upper limit of the time required for communication with all gateways to which the present invention is applied. Is possible.

  In the second embodiment, the timeout period is set according to the network (ESSID), but may be set according to the access point (BSSID). This makes it possible to more appropriately suppress the upper limit of the time required for one process.

  Further, the timeout time may be changeable by the user and / or the system by a setting file or the like. Thereby, it becomes possible to cope with various communication environments and the like.

  A computer program for causing a computer to realize the functions of the processing units 25 and 25 ′ may be provided in a form recorded on a computer-readable recording medium such as a magnetic recording medium or an optical recording medium. .

  It should be understood by those skilled in the art that various changes, substitutions, and modifications can be made thereto without departing from the spirit and scope of the present invention.

DESCRIPTION OF SYMBOLS 1, 1 'Wireless LAN communication system 2, 2' Portable terminal 21 Communication part 22, 22 'Memory | storage part 23 Operation part 24 Display part 25, 25' Processing part 251,251 'Authentication part 252 Time measuring part 253 Operating system 254 Connection control Section 255 Communication driver 3 Access point 4 Backbone network 5 Gateway 6 Authentication server 7 Internet 8 Server

Claims (3)

A portable terminal connectable to a server via a wireless LAN access point and at least one gateway,
A communication unit for communicating with an access point and a gateway;
A processing unit that establishes a communication path in the gateway by performing multiple round-trip communication with the gateway;
A timekeeping unit for measuring time,
When the processing unit starts timing by the timing unit at the start of communication with the gateway, and determines that a predetermined timeout period has elapsed based on the timing by the timing unit before establishing a communication path in the gateway To disconnect from the access point,
A portable terminal characterized by that. The predetermined timeout time is set according to a network to which a connected access point belongs.
The mobile terminal according to claim 1. A connection method in a portable terminal connectable to a server via a wireless LAN access point and at least one gateway,
The portable terminal is
Start communication with the gateway,
At that time, the time counting unit starts measuring time,
By performing multiple round-trip communications with the gateway, a communication path is established at the gateway,
Before determining the communication path in the gateway, if it is determined that a predetermined timeout period has elapsed based on the time measured by the time measuring unit, the connection with the access point is disconnected.
A connection method characterized by that.

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