JP2012169719A - Mobile communication terminal, network selection method by mobile communication terminal, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To restrict automatic connection to a network of a country or a region different from a stay country independently of whether or not a preliminarily-defined network is available.SOLUTION: A mobile communication terminal 1 has a wireless communication unit 11, a position measurement unit 14, and a communication controller 15. The communication controller 15 is configured to restrict automatic connection to a wireless communication network in the case that first stay region information determined by using identification information included in a wireless signal received from the wireless communication network via the wireless communication unit 11 and second stay region information corresponding to a current position measured by the position measurement unit 14 are contradictory to each other.

Description

  The present invention relates to a mobile communication terminal that can be connected to a wireless communication network, and more particularly to selection of a connection destination network by a mobile communication terminal that can use an international roaming service.

  Mobile communication terminals (for example, mobile phone terminals, tablet PCs) compatible with roaming services have been put into practical use. By using the roaming service, the user of the mobile communication terminal can use the wireless communication service even in the service area of another carrier that has a contract for mutual entry with the contracted communication carrier. Here, the wireless communication service includes not only a cellular communication service but also a public wireless LAN (Local Area Network) service, a WiMAX service, and the like. A mobile communication terminal user may be able to use a mobile communication terminal used in his / her country as it is in a roaming destination in a foreign country or the like, or different from the mobile communication terminal used in his / her country due to a difference in communication method. May be used. Even when using another terminal, replace the SIM (Subscriber Identity Module) in which the subscriber information is recorded with the roaming destination terminal so that the phone number used by the mobile communication terminal in the home country can be changed to the roaming destination. Can be used as is.

  A telecommunications carrier generally provides an international roaming service with a plurality of foreign or other telecommunications carriers. Users of mobile communication terminals can use international roaming services in various countries and regions. By using the international roaming service, users of mobile communication terminals can use the wireless communication service even in foreign countries (such as the country where they are traveling) where the contracted carrier does not provide the service directly. can do.

  Patent Document 1 discloses a technique in which a mobile communication terminal having a roaming function selects a connection destination network from a plurality of connectable networks. Specifically, the mobile communication terminal disclosed in Patent Document 1 measures the current location of the mobile communication terminal using a positioning device such as a GPS (Global Positioning System) receiver, and is a network that preferentially connects at the current location. It is determined whether the “priority network” set in advance by the user matches the currently connected network. If the determination results do not match, the mobile communication terminal disclosed in Patent Document 1 changes the connection destination to the “priority network” associated with the current location. That is, the mobile communication terminal disclosed in Patent Document 1 uses this preferentially as long as the “priority network” associated with the current location can be used.

JP 2009-027355 A

  It may not be desirable for a mobile communication terminal to automatically connect to a roaming destination network simply because the wireless quality of a communication carrier in an adjacent country is good, such as near a border. In such a case, the user of the mobile communication terminal is charged with a high international call charge and roaming charge. In Japan as well, this problem can occur in areas where the distance to neighboring countries is short because radio waves of communication carriers in neighboring countries can be received. For example, Tsushima can receive radio waves from Korean carriers, and it can receive radio waves from Russian carriers in northeastern Hokkaido.

  According to Patent Document 1 described above, if a user designates a telecommunications carrier in his home country (for example, Japan) as a priority network, this can be preferentially used as long as radio waves of the priority network can be received. However, in the technique of Patent Document 1, when the priority network cannot be used because the wireless quality of the priority network is not sufficient, the mobile communication terminal is connected to another available network (for example, a communication carrier in Korea or Russia, for example). It is thought that it will be connected to the national network. In this case, the user of the mobile communication terminal may be charged a high international call charge and roaming charge.

  The present invention has been made on the basis of the above-mentioned knowledge by the inventor of the present invention. Regardless of whether a predetermined network is available or not, the present invention can be applied to a network in a country or region different from the country of stay. An object of the present invention is to provide a mobile communication terminal capable of restricting automatic connection, a network selection method using the mobile communication terminal, and a program.

  The first aspect of the present invention includes a mobile communication terminal. The mobile communication terminal includes a wireless communication unit, a position measurement unit, and a communication control unit. The communication control unit includes first stay area information determined using identification information included in a wireless signal received from a wireless communication network via the wireless communication unit, and a current location measured by the position measurement unit. When the corresponding second staying area information contradicts, the automatic connection to the wireless communication network can be restricted.

  The second aspect of the present invention includes a network selection method by a mobile communication terminal. The method includes: first stay area information determined using identification information included in a wireless signal received from a wireless communication network via a wireless communication unit included in the mobile communication terminal; and position measurement included in the mobile communication terminal. Restricting automatic connection to the wireless communication network when the second stay area information corresponding to the current location measured by the unit is inconsistent.

  A third aspect of the present invention is a program for causing a computer to execute the method according to the second aspect of the present invention described above.

  According to each aspect of the present invention described above, regardless of whether or not a predetermined network is available, the automatic connection to a network in a country or region different from the country of stay is regulated. Mobile communication terminal, network selection method by mobile communication terminal, and program can be provided.

It is a block diagram which shows the structural example of the mobile communication terminal which concerns on Embodiment 1 of this invention. It is a flowchart which shows the specific example of the communication control method by the mobile communication terminal which concerns on Embodiment 1 of this invention. 3 is a flowchart showing a first specific example of the connection restriction process shown in the flowchart of FIG. 2. It is a flowchart which shows the 2nd specific example of the connection restriction | limiting process shown in the flowchart of FIG. It is a figure which shows the example of the display which promotes selection of whether to connect to a wireless communication network. It is a figure which shows the example of the setting screen of the connection operation | movement with respect to a wireless communication network. It is a block diagram which shows the other structural example of the mobile communication terminal which concerns on Embodiment 1 of this invention. It is a flowchart which shows the specific example of the communication control method by the mobile communication terminal which concerns on Embodiment 2 of this invention.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings. In each drawing, the same or corresponding elements are denoted by the same reference numerals, and redundant description is omitted as necessary for clarification of the description.

<Embodiment 1 of the Invention>
A configuration example of the mobile communication terminal 1 according to the present embodiment is shown in FIG. The mobile communication terminal 1 has an international roaming function and can be connected to a plurality of wireless communication networks provided by a plurality of communication carriers. Specific examples of the mobile communication terminal 1 include a mobile phone terminal, a smartphone, a tablet PC, a notebook PC, a USB (Universal Serial Port) type or a PC card type data communication device. Here, the wireless communication network is typically a cellular communication network having a wide service area and a high possibility of radio waves reaching across border lines of countries or regions. However, the wireless communication network may be other than the cellular communication network, for example, a public wireless LAN (Local Area Network) or a WiMAX network.

  In FIG. 1, the controller 10 performs overall control, monitoring, and information processing of the mobile communication terminal 1. The controller 10 includes a communication control unit 15. The communication control unit 15 will be described later.

  The wireless communication unit 11 connects to a wireless communication network via a base station (or a wireless access point). The wireless communication unit 11 includes known cellular communication methods such as UTRA (UMTS Terrestrial Radio Access), E-UTRA (Evolved UTRA), GSM (Global System for Mobile Communications), wireless LAN (Local Area Network), WiMAX ( Transmitter / receiver conforming to Worldwide Interoperability for Microwave Access) may be used.

  The wireless communication unit performs a cell search operation for detecting a connectable wireless communication network (specifically, a base station), receives a wireless signal including broadcast information from the detected base station, and acquires broadcast information. To do. The broadcast information includes identification information for specifying the transmission source base station and the wireless communication network. In the present embodiment, the identification information includes country information of the communication carrier as “first stay area information”. For example, in the case of UTRA (W-CDMA), broadcast information including PLMNid (Public Land Mobile Network identifier) as identification information of a communication carrier is transmitted from the base station. The PLMNid includes a country code (MCC: Mobile Country Code) and a carrier code (MNC: Mobile Network Code).

  The input device 12 is a device that receives an operation by a user. Specific examples of the input device 12 are a touch panel, a keyboard, and a mouse. The display 13 displays an image so that the user can visually recognize it. Specific examples of the display 13 are a liquid crystal display (LCD), an electroluminescence (EL) display, and a cathode ray tube (CRT) display.

  The position measurement unit 14 acquires position information indicating the current location of the mobile communication terminal 1. For example, the position measurement unit 14 may include a GPS (Global Positioning System) receiver and perform position measurement by receiving radio waves from GPS satellites. The position measurement unit 14 may use position measurement (referred to as WiFi positioning) using radio waves from a wireless LAN access point. In the WiFi positioning, the current location is specified by comparing the identification information of the access point detected by the mobile communication terminal 1 with a database in which the location information of the access point is recorded.

  The communication control unit 15 includes the country information of the communication carrier determined using the identification information included in the wireless signal received from the wireless communication network (that is, the base station) via the wireless communication unit 11, and the position measurement unit 14. When the staying country corresponding to the measured current location is inconsistent, automatic connection to the above-described wireless communication network detected by the cell search can be restricted. One example of automatic connection restriction by the communication control unit 15 is that no connection is made. As another example, the communication control unit 15 requests the user's permission to connect to the wireless communication network when the country information of the communication carrier and the staying country are inconsistent (in other words, manually instead of automatically). It is also possible to connect with

  More specifically, the communication control unit 15 receives position information indicating the current location from the position measurement unit 14. Then, the communication control unit 15 determines a staying country as “second staying area information” based on the position information measured by the position measuring unit 14. For example, the communication control unit 15 may determine the country of stay by collating position information indicating the current location with map data (not shown). Map data should just contain the information which shows to which country the coordinate point specified by the latitude and the longitude corresponds. The map data may be stored in a memory (not shown) mounted on the mobile communication terminal 1 or may be held in a remote server accessible via the wireless communication unit 11.

  The case where the country information of the telecommunications carrier and the staying country information derived from the current location measured by the position measurement unit 14 are “conflicting” typically means two countries or regions indicated by these two pieces of information. Is a mismatch. In addition, it is possible to specify a region (for example, European Union (EU)) in which either one of the country information of the communication carrier and the stay country information derived from the current location measured by the position measurement unit 14 includes a plurality of countries. Conceivable. In this case, the communication control unit 15 may determine that the two pieces of information are “conflicting” when the region designated by one of the regions does not include the country indicated by the other.

  In addition, connecting to the wireless communication network includes (a) performing position registration in the wireless communication network and performing a standby operation, and (b) controlling signals (for example, session management) between the mobile communication terminal 1 and the wireless communication network. And (c) connecting a data channel for transmitting and receiving user data between the mobile communication terminal 1 and the wireless communication network, and (c) connecting a control channel for transmitting and receiving the control signal for mobility management). At least one of them.

  In the configuration example of FIG. 1, the mobile communication terminal 1 includes the input device 12 and the display 13. However, for example, when the mobile communication terminal 1 is a USB (Universal Serial Port) type or PC card type data communication device, the mobile communication terminal 1 may not have the input device 12 and the display 13.

  Then, the specific example of the communication control method performed by the mobile communication terminal 1 which concerns on this Embodiment is demonstrated using the flowchart of FIG. In step S10, the wireless communication unit 11 performs a cell search to detect a connectable wireless communication network (that is, a base station). Usually, the mobile communication terminal 1 periodically performs a cell search operation. In step S11, the wireless communication unit 11 receives broadcast information from the base station detected by the cell search, and acquires country information of the communication carrier.

  In step S12, the position measurement unit 14 measures the current location of the mobile communication terminal 1 and generates location information indicating the current location. In step S <b> 13, the communication control unit 15 determines the country of stay based on the position information obtained by the position measurement unit 14. In addition, the execution order of step S10 and S11 and step S12 and S13 is not specifically limited. For example, only steps S12 and S13 or step S12 may be performed before steps S10 and S11, or steps S12 and S13 may be performed in parallel with steps S10 and S11.

  In step S14, the communication control unit 15 determines whether the country information of the communication carrier derived from the broadcast information of the wireless communication network and the country of stay information derived from the current location measured by the position measurement unit 14 are inconsistent. judge. If the two pieces of information do not contradict each other (NO in step S14), the communication control unit 15 controls the wireless communication unit 11 to automatically connect to the network detected by the cell search (step S15). On the other hand, if the two pieces of information are contradictory (YES in step S14), the communication control unit 15 performs a process for restricting automatic connection to the network detected by the cell search (referred to as a connection restriction process) (step S16). .

  As described above, one example of the connection restriction process (step S16) is not to connect to the wireless communication network. FIG. 3 is a flowchart showing a specific procedure of this example. In step S160, the communication control unit 15 discards the country information of the network operator detected in the cell search. In step S161, the communication control unit 15 controls the wireless communication unit 11 so as not to connect to the network detected by the cell search.

  Another example of the connection restriction process (step S16) is to perform connection to the network detected by the cell search on condition that the user permits. FIG. 4 is a flowchart showing a specific procedure of this example. In step S162, the communication control unit 15 outputs to the display 13 a prompt for selecting whether to connect to the network detected by the cell search. Then, the communication control unit 15 accepts a user's selection via the input device 12. A display example in step S162 is shown in FIG.

  In step S163, it is determined whether the user's selection is connection permission. When the user permits the connection (YES in step S163), the communication control unit 15 controls the wireless communication unit 11 to connect to the network detected by the cell search (step S164). On the other hand, when the user does not permit the connection (NO in step S163), the communication control unit 15 controls the wireless communication unit 11 so as not to connect to the network detected by the cell search (step S165).

  As shown in FIG. 4, the mobile communication terminal 1 performs an operation mode (hereinafter referred to as a manual mode) in which connection to the roaming destination network detected by the cell search is performed on condition of user permission, and connection restriction is performed. The operation mode (hereinafter referred to as “automatic mode”) for automatically connecting without being connected may be changed by a user operation. FIGS. 6A and 6B show screen display examples of the display 13 for accepting a setting operation for the manual mode and the automatic mode.

  As described above, the mobile communication terminal 1 including the controller 10 (specifically, the communication control unit 15) according to the present embodiment includes a staying country derived from the current location obtained by the position measurement unit 14, and a wireless communication network. When there is a contradiction with the country information of the communication carrier included in the wireless signal transmitted from, automatic connection to this wireless communication network can be restricted. For this reason, even if the mobile communication terminal 1 cannot use a predetermined network such as the priority network described in Patent Document 1, the wireless communication terminal 1 is a wireless network of a telecommunications carrier in a country or region different from the country of stay. It is possible to regulate automatic connection to a communication network.

  Note that the function of the communication control unit 15 described in the present embodiment is realized by causing a computer system including a processor such as a CPU (Central Processing Unit) or MPU (Micro Processing Unit) to execute one or a plurality of programs. May be. Specifically, the first is to determine whether or not the country information of the communication carrier derived from the broadcast information of the wireless communication network and the country of stay information derived from the current location measured by the position measurement unit 14 are inconsistent. The instruction group and the second instruction group for controlling the wireless communication unit 11 according to the determination result may be stored in a memory accessible by the processor. These first and second instruction groups may be provided as one program, or may be provided by being divided into a plurality of programs. The computer system including the processor operates as the communication control unit 15 by executing the first and second instruction groups.

  These programs can be stored using various types of non-transitory computer readable media and supplied to a computer. Non-transitory computer readable media include various types of tangible storage media. Examples of non-transitory computer-readable media include magnetic recording media (for example, flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (for example, magneto-optical disks), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W and semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable PROM), flash ROM, RAM (random access memory)) are included. The program may also be supplied to the computer by various types of transitory computer readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

  FIG. 7 shows a configuration example when the mobile communication terminal 1 is manufactured using a computer system. The touch panel 121 is a specific example of the input device 12. The LCD 131 is a specific example of the display 13. An OS (Operating System) 103 and a communication control program 104 stored in a nonvolatile storage unit 102 (for example, a flash memory or a hard disk drive) are loaded into a RAM (Random Access Memory) 101. When the MPU 100 executes the OS 103 and the communication control program 104 loaded in the RAM 101, the functions of the controller 10 including the communication control unit 15 are realized.

<Embodiment 2 of the Invention>
In the present embodiment, a modified example of mobile communication terminal 1 according to Embodiment 1 of the present invention described above will be described. In the present embodiment, the country information of the telecommunications carrier stored in the past by the mobile communication terminal 1 does not match the country information of the telecommunications carrier derived from the broadcast information newly obtained by performing the cell search. As a condition, the operation described in the first embodiment of the invention, that is, the current location by the position measurement unit 14 and the country information and the current location derived from the broadcast information obtained by performing cell search. Performs communication control operations including comparison with the country of stay. Thus, the location measurement unit 14 may be operated to measure the current location only when the country information of the communication carrier derived from the broadcast information obtained by performing the cell search has been updated from the previously stored information. . In other words, it is not necessary to operate the position measurement unit 14 every time a regular cell search is performed to measure the current location, so that power consumption of the mobile communication terminal 1 can be suppressed.

  Below, the specific example of the communication control method by the mobile communication terminal concerning this Embodiment is demonstrated. The configuration example of the communication terminal according to the present embodiment may be the same as the configuration example of the first embodiment shown in FIGS. FIG. 8 is a flowchart showing a specific example of the communication control method according to the present embodiment. The processing contents in each of steps S10, S11, S12, S13, S14, and S16 in FIG. 8 are the same as the corresponding steps of the same reference numerals shown in FIG.

  In steps S20 and S21 of FIG. 8, the country information of the telecommunications carrier newly acquired by performing the cell search is compared with the country information of the telecommunications carrier stored in the mobile communication terminal 1 in the past. If the two pieces of country information match (YES in step S21), the communication control unit 15 connects the wireless communication unit 11 so as to connect to the wireless communication network of the communication carrier corresponding to the country information stored in the past. Is controlled (step S24).

  On the other hand, if the two pieces of country information do not match (NO in step S21), steps S12 to S14 described in the first embodiment of the invention are performed. That is, the position measurement unit 14 measures the current location (step S12), and the communication control unit 15 determines the country of stay based on the current location obtained by the position measurement unit 14 (step S13). Then, the communication control unit 15 includes the country information of the communication carrier derived from the broadcast information of the wireless communication network detected by the new cell search and the country of stay information derived from the current location measured by the position measurement unit 14. It is determined whether there is a contradiction (step S14).

  If the two pieces of information do not contradict each other (NO in step S14), the communication control unit 15 has previously stored information based on the country information of the communication carrier derived from the broadcast information of the wireless communication network detected by the new cell search. The country information of the communication carrier is updated (step S23). Thereby, in step S24 after step S23, control to connect to the wireless communication network detected by the new cell search is performed.

  On the other hand, when the two pieces of information contradict each other (YES in step S14), the communication control unit 15 performs a process of restricting automatic connection to the network detected by the cell search (referred to as a connection restriction process) ( Step S16).

  The function of the communication control unit 15 described in the present embodiment may also be realized by causing a computer system to execute a program, as described in the first embodiment of the invention.

  Furthermore, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention described above.

  For example, a part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1)
A wireless communication unit;
A position measurement unit;
First stay area information determined using identification information included in a radio signal received from a radio communication network via the radio communication unit, and a second stay corresponding to the current location measured by the position measurement unit A communication control unit capable of restricting automatic connection to the wireless communication network when there is a conflict with regional information;
A mobile communication terminal comprising:

(Appendix 2)
It further includes a display unit capable of displaying an image,
The said communication control part outputs the display which prompts selection of whether to connect to the said radio | wireless communication network to the said display part, when the said 1st and 2nd stay area information contradicts, Additional remark 1 Mobile communication terminal.

(Appendix 3)
The communication control unit is configured to change whether to automatically connect to the wireless communication network according to a user operation when the first and second stay area information contradict each other, The mobile communication terminal according to 1 or 2.

(Appendix 4)
The mobile communication terminal according to supplementary note 1, wherein the communication control unit does not automatically connect to the wireless communication network when the first and second stay area information contradict each other.

(Appendix 5)
The communication control unit obtains the second stay area information and the first and second stays on the condition that the previously stored stay area information and the first stay area information do not match. The mobile communication terminal according to any one of appendices 1 to 4, which determines whether the regional information is inconsistent.

(Appendix 6)
The mobile communication terminal according to any one of appendices 1 to 5, wherein the communication control unit automatically connects to the wireless communication network when the first and second stay area information are consistent.

(Appendix 7)
The said communication control part acquires the said 2nd visitor country information by collating the positional information which shows the present location measured by the said positional measurement part with map data, The appendix 1-6 any one of additional notes 1-6. Mobile communication terminals.

(Appendix 8)
The mobile communication terminal according to any one of appendices 1 to 7, wherein the identification information includes country information included in business operator identification information broadcast from the wireless communication network.

(Appendix 9)
Connecting to the wireless communication network includes (a) performing location registration in the wireless communication network and performing a standby operation, and (b) transmitting and receiving control signals between the mobile communication terminal and the wireless communication network. Appendices 1-8, including at least one of: (c) connecting a control channel, and (c) connecting a data channel for transmitting and receiving user data between the mobile communication terminal and the wireless communication network. The mobile communication terminal according to any one of the above.

(Appendix 10)
Measured by first location information determined using identification information included in a radio signal received from a radio communication network via a radio communication unit included in the mobile communication terminal, and a position measurement unit included in the mobile communication terminal. A network selection method by a mobile communication terminal, comprising restricting automatic connection to the wireless communication network when the second stay area information corresponding to the current location is inconsistent.

(Appendix 11)
Restricting automatic connection to the wireless communication network outputs a display prompting selection of whether or not to connect to the wireless communication network when the first and second stay area information contradict each other. The method of claim 10 comprising:

(Appendix 12)
The method according to appendix 10 or 11, further comprising changing whether to automatically connect to the wireless communication network when the first and second stay area information contradict each other according to a user operation. .

(Appendix 13)
The method of claim 10, wherein restricting automatic connection to the wireless communication network includes not automatically connecting to the wireless communication network when the first and second region-of-stay information conflicts. .

(Appendix 14)
Acquisition of the second stay area information by the position measurement unit, and the first and second stay areas on condition that the previously stored stay area information and the first stay area information do not match 14. The method according to any one of appendices 10 to 13, further comprising determining whether the information is inconsistent.

(Appendix 15)
15. The method according to any one of appendices 10 to 14, further comprising automatically connecting to the wireless communication network when the first and second stay area information are not inconsistent.

(Appendix 16)
The program for making a computer perform the method of any one of Additional remarks 10-15.

DESCRIPTION OF SYMBOLS 1 Mobile communication terminal 10 Controller 11 Wireless communication part 12 Input device 13 Display 14 Position measurement part 15 Communication control part 100 MPU (Micro Processing Unit)
101 RAM (Random Access Memory)
102 Non-volatile storage unit 103 Operating system (Operating System (OS))
104 Communication control program 121 Touch panel 131 Liquid crystal display
141 GPS (Global Positioning System) receiver

Claims (10)

A wireless communication unit;
A position measurement unit;
First stay area information determined using identification information included in a radio signal received from a radio communication network via the radio communication unit, and a second stay corresponding to the current location measured by the position measurement unit A communication control unit capable of restricting automatic connection to the wireless communication network when there is a conflict with regional information;
A mobile communication terminal comprising: It further includes a display unit capable of displaying an image,
The said communication control part outputs the display which prompts selection of whether to connect to the said wireless communication network to the said display part, when the said 1st and 2nd stay area information contradicts. Mobile communication terminals.   The communication control unit is configured to be able to change whether to automatically connect to the wireless communication network according to a user operation when the first and second stay area information contradict each other, Item 3. The mobile communication terminal according to Item 1 or 2.   The mobile communication terminal according to claim 1, wherein the communication control unit does not automatically connect to the wireless communication network when the first and second stay area information contradict each other.   The communication control unit obtains the second stay area information and the first and second stays on the condition that the previously stored stay area information and the first stay area information do not match. The mobile communication terminal according to any one of claims 1 to 4, wherein determination is made as to whether the regional information is inconsistent.   The mobile communication terminal according to any one of claims 1 to 5, wherein the communication control unit automatically connects to the wireless communication network when the first and second stay area information are consistent.   Connecting to the wireless communication network includes (a) performing location registration in the wireless communication network and performing a standby operation, and (b) transmitting and receiving control signals between the mobile communication terminal and the wireless communication network. And (c) connecting a data channel for transmitting and receiving user data between the mobile communication terminal and the wireless communication network. The mobile communication terminal according to any one of 6.   Measured by first location information determined using identification information included in a radio signal received from a radio communication network via a radio communication unit included in the mobile communication terminal, and a position measurement unit included in the mobile communication terminal. A network selection method by a mobile communication terminal, comprising restricting automatic connection to the wireless communication network when the second stay area information corresponding to the current location is inconsistent.   Restricting automatic connection to the wireless communication network outputs a display prompting selection of whether or not to connect to the wireless communication network when the first and second stay area information contradict each other. The method of claim 8 comprising:   A program for causing a computer to execute the method according to claim 8 or 9.

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