JP2010034640A - Portable communication terminal, portable communication system, and base station retrieval method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable communication terminal, a portable communication system and a base station retrieval method, for quickly performing cell search by using the information of an electronic ticket. <P>SOLUTION: This portable communication terminal is provided with: a communication part for performing radio communication by a plurality of communication systems and a plurality of frequency; a first storage means for reading/writing the destinations of a public transport; a base station retrieval means for retrieving a connectable radio base station; a latest information storage means for receiving the latest information related with the communication systems and frequency of the destinations written in the first storage means, and for storing it in a second storage means; and a base station retrieval control means for controlling the operation of the base station retrieval means to retrieve the base station based on the communication systems and frequency stored in the second storage means after arrival at the destinations. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mobile communication terminal capable of searching for a radio base station, a mobile communication system, and a base station search method.

  A mobile phone from which an aircraft boarding pass can be purchased is described in Japanese Patent Application Laid-Open No. 2004-054673 (Patent Document 1). The portable terminal includes a storage unit that can store boarding pass information in the terminal, and further includes a check-in control unit that performs a predetermined check-in process by communicating with an automatic check-in machine installed at the airport. Prepare.

  A portable communication terminal that can shorten the cell search time is described in Japanese Patent Application Laid-Open No. 2004-215259 (Patent Document 2). This mobile communication terminal acquires and stores the used frequency for each service vendor from the network, and performs a cell search with the acquired frequency, thereby shortening the cell search time.

  A portable terminal that reduces the cell search processing is described in Japanese Patent Application Laid-Open No. 2005-277883 (Patent Document 3). This mobile communication terminal transmits / receives entry / exit information at the station ticket gate, and receives and stores the station information. In the cell search, the mobile communication terminal performs a cell search for the current cell and a cell that is the next destination candidate.

  Furthermore, a portable communication terminal capable of reducing the cell search time is described in Japanese Patent Application Laid-Open No. 2007-020049 (Patent Document 4). The mobile communication terminal receives a current position from a user, reads out area information stored in the terminal in advance based on the position, and performs a cell search.

JP 2004-046773 A JP 2004-215259 A JP 2005-277883 A JP 2007-020049 A

  The display device described in the above-mentioned Patent Document 1 is neither described nor suggested as to the technology related to cell search.

  In addition, since the mobile communication terminal described in Patent Document 2 has acquired the use frequency for each service vendor from the network, if the use frequency cannot be acquired due to reasons such as out-of-service or a communication error, a situation occurs. Since a general all-band search is performed, the search time cannot be shortened.

  Moreover, the portable terminal described in Patent Document 3 is an invention that assumes entry / exit information at a station ticket gate and assumes its travel route related to railways in Japan. Since it is not necessary to turn off the power in a railway, the current cell can be confirmed. However, in the case of an aircraft that needs to be turned off, the current cell cannot be confirmed. Since the current cell cannot be confirmed even if the technology described in Patent Document 3 for performing cell search is applied to the current and next destination cell, the cell search processing is performed. The effect that can be reduced cannot be expected.

  Furthermore, since the mobile communication terminal described in Patent Document 4 is a mobile communication terminal that shortens the cell search time by accepting an input of the current position from the user, if the user forgets to input, the cell of all bands This is a search, and the effect of shortening the cell search time cannot be obtained. Further, the effect of shortening the cell search time cannot be obtained even when the user makes a mistake in inputting the current position or when the user cannot confirm the current position accurately. Furthermore, the area information stored in advance may become obsolete due to the service change of the communication carrier, and the search time may become longer. For example, a case where a service using a WCDMA (Wideband Code Division Multiple Access) communication method is newly started and a service using a GSM (Global System for Mobile communications) communication method is completed corresponds to this case.

  An object of the present invention is to solve the above-described problems and provide a mobile communication terminal, a mobile communication system, and a base station search method capable of quickly performing a cell search.

This invention is for solving the said subject, Comprising: The portable communication terminal of this invention is
A communication unit capable of wireless communication with a plurality of communication systems or a plurality of frequencies; and
A first storage means capable of reading and writing the destination of transportation;
Base station search means for searching for connectable radio base stations;
Latest information storage means for receiving the latest information on the communication method and frequency of the destination written in the first storage means and storing it in the second storage means;
After arriving at the destination, a base station search control means for controlling the operation of the base station search means so as to search for a radio base station based on the communication method and frequency stored in the second storage means.

The mobile communication system of the present invention
The aforementioned mobile communication terminal,
An information providing server that is connected to the Internet and provides the latest information on the destination communication method and frequency,
A wireless base station for communicating with the mobile communication terminal.

Further, the base station search method of the present invention includes:
A storage step for storing the latest information on the communication method and frequency of the destination of the transportation,
A determination step of determining whether or not the destination has been reached;
After it is determined that the destination has been reached in this determination step, a base station search step for searching for a connectable radio base station based on the communication method and frequency is provided.

  According to the present invention configured as above, the following effects can be obtained.

  According to the present invention, the latest information on the destination communication method and frequency is stored in the second storage means, and after arrival at the destination, the base station is searched based on the communication method and frequency stored in the second storage means. Therefore, it is possible to search for a base station preferentially with the destination communication method and frequency. For this reason, the time required for searching for a radio base station can be shortened.

  A first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a functional block diagram showing the mobile communication terminal of the first embodiment.

  The mobile communication terminal 101 includes a communication unit 102, a control device 109, and first storage means 107.

  The communication unit 102 is connected to the antenna 108 and is a wireless communication unit capable of wireless communication with a plurality of communication methods and / or a plurality of frequencies (or frequency bands).

  The control device 109 controls the entire mobile communication terminal 101. The control device 109 includes the latest information storage means 103, second storage means 104, base station search means 105, and base station search control means 106.

  The latest information storage means 103 receives the latest information regarding the destination communication method and frequency written in the second storage means 104 and stores it in the second storage means 104.

  The base station search means 105 performs a base station search for a connectable radio base station in order to register the location of the mobile communication terminal 101.

  The base station search control means 106 controls the operation of the base station search means 105 to search for a base station based on the communication method and frequency stored in the second storage means 104 after arrival at the destination. Note that the base station search includes a base station search called a cell search and other base station searches.

  The first storage unit 107 is a storage unit that can read and write the destination of transportation.

  Note that since the mobile communication terminal 101 is a communication terminal, the mobile communication terminal 101 includes a receiving unit and a transmitting unit for making a voice call, and a plurality of keys for inputting a telephone number, which are not illustrated. Since the mobile communication terminal 101 is portable, power is supplied by a rechargeable battery, which is not shown.

  The operation of the mobile communication terminal 101 configured as described above will be described with reference to FIG. FIG. 2 is a flowchart showing the operation of the portable communication terminal.

  First, in step 201 (hereinafter, “step” is referred to as “S”), the user uses the mobile communication terminal 101 to obtain an electronic ticket. As an acquisition method, there are a method of purchasing using an electronic money function and a credit function of the mobile communication terminal 101, and a free acquisition by utilizing various services.

  When the user obtains the electronic ticket in S201, the control device 109 writes the destination in the first storage means 107. Then, the latest information storage unit 103 receives the destination communication method and frequency based on the destination written in the first storage unit 107 and stores it in the second storage unit 104 (S202). A method in which the latest information storage means 103 receives a destination communication method and frequency, that is, a method for obtaining the information is a method for obtaining a connection to a network (Internet or intranet) and downloading from an information providing server, or an electronic ticket is provided by public transportation. In the case of a boarding pass or boarding ticket, there are a method of obtaining by manual input at the store, a method of obtaining by communication at the store, and the like.

  Next, in S203, the control device 109 determines whether or not the destination has been reached. Whether or not the destination has been reached can be determined based on a predetermined key input by the user that the destination has been reached. Alternatively, when the electronic ticket is an aircraft boarding pass, it is possible to determine that the destination has arrived when the power is turned on from the power-off state (when the activation is completed).

  When the user arrives at the destination (YES in S203), the base station search means 105 performs a base station search based on the communication method and frequency in the second storage means 104 according to the control of the base station search control means 106. At this time, the base station search means 105 can search for a base station using a plurality of communication methods and frequencies. However, the base station search means 105 does not use a normal base station search based on all the bands, but uses the communication method and frequency in the second storage means 104. Based on this, a base station search is performed.

  When a connectable base station is found by the base station search (YES in S205), in S206, the control device 109 performs location registration with the found base station. If a connectable base station cannot be found (NO in S205), the base station search means 105 performs a normal base station search in S207. If this base station could not be found, the aircraft landed at an airport different from the destination due to bad weather or abnormal aircraft, that is, the destination in the second storage means 104 and the destination actually visited by the user. There is a case in which does not match.

  If a connectable base station can be found in the normal base station search in S207 (YES in S208), the control device 109 registers the location in the found base station in S206. If a connectable base station cannot be found in S208 (NO in S208), the control moves to S204. If a connectable base station cannot be found in S208, it is possible that the mobile communication terminal 101 does not support a simple failure in base station search or the communication method and frequency at the destination. If the location is registered in the discovered base station in S206, the user can use the mobile communication terminal 101 at the destination.

  The mobile communication terminal 101 of the present invention that operates as described above performs a base station search using a communication method or frequency of a destination of a transportation facility. For this reason, this mobile communication terminal 101 can perform a base station search with a communication method and frequency that should be preferentially searched for at the destination. As a result, the mobile communication terminal 101 can shorten the time for searching for a base station and suppress battery consumption as compared with a case where a normal base station search (all-band search) is performed. In addition, since the user does not need to input position information, the mobile communication terminal 101 can shorten the time for searching for a base station without taking the user's trouble.

  Next, the mobile communication system of 2nd Embodiment of this invention is demonstrated based on FIGS. FIG. 3 is an explanatory diagram showing a mobile communication system according to the second embodiment.

  The mobile communication system 301 includes a mobile communication terminal 401, an information providing server 303, and a radio base station 305 of a communication company for communicating with the mobile communication terminal 401. The wireless base station 305 is connected to the Internet 302 via a packet communication network 306. The mobile communication system 301 further includes a purchase server 304 connected to the Internet 302. The purchase server 304 is connected to the mobile communication terminal 401 when purchasing an electronic ticket. This electronic ticket is, for example, an air ticket (boarding pass).

  The information providing server 303 is connected to the Internet 302 and provides information on the latest communication method and frequency regarding the destination of the user. Further, the information providing server 303 can be arranged in various places overseas, but can also be arranged in a specific country. When the information providing server 303 is arranged in various places overseas, it is only necessary to provide at least the communication method and frequency of the country in which the information providing server 303 is arranged. In addition, a plurality of wireless base stations 305 are installed in communication carriers for communicating with the mobile communication terminal 401.

  The mobile communication system 301 further includes an automatic ticket gate 307 installed at the airport. This automatic ticket gate 307 permits passage of the user who brings the boarding pass. In addition, the automatic ticket gate 307 transmits a signal for turning off the power of the mobile communication terminal 401 at the entrance, and transmits a signal for permitting the completion of activation of the mobile communication terminal 401 at the exit. Further, the automatic ticket gate 307 writes boarding information representing the meaning of boarding the IC chip 107A of the mobile communication terminal 401 at the entrance, and the IC chip 107A (see FIG. 4) of the mobile communication terminal 401 at the exit. Clear boarding information. The boarding information can be written or erased regardless of whether the mobile communication terminal 401 is turned on or off.

  FIG. 4 is a functional block diagram showing a mobile communication terminal used in the mobile communication system.

  The portable communication terminal 401 includes a communication unit 102, a control device 402, an IC chip 107A, a main body operation unit 404, a main body display unit 405, and an audio device 406.

  The communication unit 102 is a wireless communication unit capable of wireless communication with a plurality of communication methods and / or a plurality of frequencies.

  The control device 402 controls the entire mobile communication terminal 401. The control device 402 includes a latest information storage unit 103A, a memory 104A functioning as a second storage unit, a cell search unit 105A, a cell search control unit 106A, and a power supply control unit 403.

  The latest information storage means 103A downloads the latest information on the communication method and frequency of the destination airport of the purchased electronic ticket and the communication method and frequency of the roaming country including the destination airport from the Internet and stores them in the memory 104A.

  The cell search means 105A performs a cell search to search for a connectable radio base station 305 in order to register the location of the mobile communication terminal 401. Note that cell search is one of the base station search methods.

  The cell search control unit 106A is configured to perform a cell search based on the communication method and frequency of the destination airport stored in the memory 104A and the communication method and frequency of the roaming country including the destination airport after arrival at the destination. Control the behavior.

  The power supply control means 403 turns off the power of the portable communication terminal 401 when receiving a signal at the entrance of the automatic ticket gate 307 at the airport, and permits the completion of activation of the portable communication terminal 401 when receiving a signal at the exit of the automatic ticket checker 307. .

  The IC chip 107A functions as a first storage unit and has a function capable of transmitting and receiving with the airport automatic ticket gate 307.

  The main body operation unit 404 is specifically a plurality of keys, and is operated by the user when inputting a telephone number or using other functions.

  The main body display unit 405 displays the input telephone number or data such as an address book.

  The voice device 406 is used for voice calls. The voice device 406 includes a receiver (not shown) that functions as a receiver and a transmitter (not shown) that functions as a microphone.

  FIG. 5 shows a summary of examples of communication methods and frequencies of destination airports stored in the memory 104A. Although a plurality of destinations are tabulated in FIG. 5, one or more may be stored in the memory 104A because they are destinations. The destination is J. USA. F. In the case of KENNEDY airport, GSM1900, f4, f5, and f6 are downloaded and stored in the memory 104A as the communication method and frequency in the airport. Also, GSM850, f13, f14, f15, GSM1900, f4, f5, f6, f16, f17, f18, and WCDMA850, f19, f20 are downloaded and stored in the memory 104A as the communication method and frequency in the roaming country. Is done. Since an IATA (International Air Transport Association) code and an airport name correspond to each other, this IATA code can be used instead of the airport name.

  FIG. 6 is a flowchart showing the operation of the mobile communication terminal when purchasing an electronic ticket in the mobile communication terminal used in the mobile communication system of the second embodiment. FIG. 7 is a flowchart showing the operation of the portable communication terminal at the destination.

  As described above, the electronic ticket is the boarding pass for the aircraft, the departure country is Japan, and the destination is an overseas country that provides a mobile communication service with a communication method and frequency different from those of Japan.

  In S601 of FIG. 6, the user at the time of purchasing the electronic ticket checks the passenger name, boarding flight name, boarding section (including the destination), boarding schedule, and the like. This confirmation can be confirmed on the display of the main body display unit 405. In step S602, the control device 402 determines whether the user's boarding pass purchase is OK. When the purchase server 304 authenticates the mobile communication terminal 401 and the user performs an OK operation for purchasing a boarding pass (YES in S602), the control device 402 fixes the unique identification number of the mobile communication terminal 401 and the IC chip 107A. The identification number is transmitted to the purchase server 304, and boarding pass information (boarding flight name, boarding section, etc.) is written into the IC chip 107A.

  Next, in step S604, the latest information storage unit 103A connects to the information providing server 303, downloads information (communication method and frequency) regarding the destination country and airport, and stores the information in the memory 104A in the mobile communication terminal 401.

  Thus, if the operation at the time of purchase is performed correctly, the information (destination) of the purchased ticket is written in the IC chip 107A, and the destination of the purchased ticket is stored in the memory 104A in the mobile communication terminal 401. Stores information on communication methods and frequencies related to countries and airports. Unless the user changes the destination or the aircraft changes the destination (landing airport) due to bad weather, the destination the user has made, and the destination country or airport written in the IC chip 107A The destination country and airport stored in the memory 104A coincide with each other.

  Next, the operation of the mobile communication terminal 401 when arriving at the destination will be described based on FIG.

  When the user gets on the aircraft, the power of the portable communication terminal 401 is turned off by a signal from the automatic ticket gate 307. When arriving at the destination airport, it is not necessary to turn off the power of the mobile communication terminal 401, so the user turns on the power of the mobile communication terminal 401. Before turning on the power, it is necessary to receive the signal for permitting the activation completion by bringing the mobile communication terminal 401 close to a predetermined position of the automatic ticket checker 307 so as to receive the signal at the exit of the automatic ticket checker 307 in advance. . When this activation completion signal is received, the boarding information of the IC chip 107A is deleted.

  When the power is turned on by the user (S701), the mobile communication terminal 401 starts to start. At the time of activation, in step S702, the control device 402 determines whether boarding information indicating that the boarding is on the IC chip 107A of the mobile communication terminal 401 is written. If boarding information is written in the IC chip 107A (YES in S702), the control device 402 stops the activation of the mobile communication terminal 401 because it does not receive a signal for permitting activation completion. The mobile communication terminal 401 whose activation has been stopped returns to the power-off state.

  If boarding information is not written in the IC chip 107A in S702 (NO in S702), the boarding information of the IC chip 107A is received when a signal for permitting activation is received when passing through the airport automatic ticket gate 307. Is deleted, the control device 402 continues the activation of the mobile communication terminal 401 and completes the activation. When the activation is completed, the mobile communication terminal 401 is in a power-on state, but in this state, the location registration to the radio base station 305 has not been performed yet.

  Next, the control device 402 determines whether or not the destination in the IC chip 107A matches the destination in the memory 104A. If the destination in the IC chip 107A matches the destination in the memory 104A (YES in S703), the cell in S704 is based on the cell information (communication method and frequency) in the airport stored in the memory 104A. Search means 105A executes a cell search.

  In S705, the control device 402 determines whether or not a connectable cell (base station) has been found. If a connectable cell is found (YES in S705), the control device 402 sets the detected cell in step S706. Register the location. If the cell search means 105A cannot find a connectable cell in S705 (NO in S705), a cell search is performed based on the roaming country cell information (communication method and frequency) stored in the memory 104A in S707. Means 105A performs a cell search. The cell information in the roaming country is a cell search with a wider range than the cell search for the airport because the cell search communication method and frequency are set more than the cell information in the airport.

  In S708, it is determined whether the control device 402 has found a connectable cell. If a connectable cell is found (YES in S708), the control device 402 registers the location in the found cell in S706. If a connectable cell cannot be found (NO in S708), the cell search means 105A performs a normal cell search in S709. If the destination in the IC chip 107A does not match the destination in the memory 104A in S703 (NO in 703), the cell search means 105A performs a normal cell search in S709. This normal cell search is an all-band search, and is a cell search in which cell search is performed by sequentially switching frequencies and communication methods. When this normal cell search is performed, the user may change the destination or the aircraft may change the destination (landing airport) due to bad weather.

  In step S710, the control device 402 determines whether a connectable cell has been found. If a connectable cell is found (YES in step S710), the control device 402 registers a location in the found cell in step S706. To do. If a connectable cell cannot be found (NO in S710), the control moves to S703.

  The mobile communication terminal 401 that operates in this manner first performs a cell search using the communication method and frequency in the airport, and if a cell that can be connected is not found by this cell search, the mobile communication terminal 401 then enters the roaming country. Perform a cell search by expanding the search range. As described above, since the mobile communication terminal 401 executes the cell search with priorities, the cell search time can be shortened.

  Such a base station search method can also be used as a base station search method when the mobile communication terminal 401 is out of service. The operation in this case is shown in FIG. FIG. 8 is a flowchart showing the operation when the mobile communication terminal 401 is out of service at the destination.

  The flowchart shown in FIG. 8 is the same as that in FIG.

  If the user arrives at the destination, and once the location is registered, the user may not be able to communicate with the radio base station 305, for example, if the user enters a building or basement, the user may be out of service area. Also in this case, the base station search method of the present invention can be applied.

  In S801, the control device 402 determines whether or not the service area is out of the service area. If the control apparatus 402 is out of service area (YES in S801), the control proceeds to S703. The control from S703 is as described in FIG.

  As described above, the cell search time can be shortened even when the cell search is performed again and the location registration is performed (in the case of return to the service area) when the service area is out of service area.

  In this embodiment, the timing of downloading the latest information on the communication method and frequency of the destination of the purchased electronic ticket has been described as an example executed at the time of purchasing the electronic ticket (when the destination is acquired). The control can be set so that the user passes the entrance of the automatic ticket gate 307. In this case, the latest communication method and frequency related to the destination can be downloaded and stored in the memory 104A immediately before boarding the aircraft. In other words, even if the communication method and frequency are changed between the time of purchase of the airline ticket and the time of boarding the actual aircraft, the cell search can be performed using the latest communication method and frequency. .

  Next, the communication system of 3rd Embodiment is demonstrated based on FIG. 9, FIG. The communication system is basically the same as that of the second embodiment, but the configuration and operation of the mobile communication terminal are slightly different. For this reason, the same reference numerals and the same step numbers are assigned to the same or substantially the same parts as the configuration and operation steps of the second embodiment, and the different reference numerals and the different step numbers are assigned to the different parts.

  FIG. 9 is a functional block diagram illustrating a mobile communication terminal used in the communication system according to the third embodiment.

  The mobile communication terminal 401A does not include the power control unit 403 of the mobile communication terminal 401, but includes a display control unit 901. When the user turns on the mobile communication terminal 401A after arrival at the destination, the display control unit 901 displays a message on the main body display unit 405 indicating whether the destination has been stored in the memory 104A. The control device 402A controls the mobile communication terminal 401A as a whole.

  Next, the operation of the mobile communication terminal 401A will be described with reference to FIG. FIG. 10 is a flowchart showing the operation of the mobile communication terminal when using the communication system.

  The arriving airport is an airport that does not have an automatic ticket gate.

  In S1001 shown in FIG. 10, when the control device 402A detects that the power is turned on by the user, the mobile communication terminal 401A starts to start, and in S702, is the boarding information written in the IC chip 107A? Determine whether or not.

  If boarding information is not written in the IC chip 107A (NO in S702), the control shifts to S703, and the subsequent operation is the same as the operation in FIG.

  If boarding information has been written in the IC chip 107A (YES in S702), the display control means 901 displays "Did you arrive at the airport (in the memory)?" On the main body display unit 405 in S1002. To do. If the airport stored in the memory 104A is Beijing Capital International Airport, the actual display is “Have you arrived at Beijing Capital International Airport?”.

  When actually arriving at Beijing Capital International Airport, the user makes an affirmative input to the displayed message. The affirmative input includes an input for pressing the “OK key” in the middle of the cross key and an input for pressing the affirmative key indicated on the main body display unit 405.

  If the user inputs “OK” (an affirmative input) in S1003 (YES in S1003), in S1004, the control device 402A deletes the boarding information of the IC chip 107A, and the same destination as the memory 104A is stored in the IC chip 107A. Write information. Then, when the control shifts to S702, the boarding information on the IC chip 107A is deleted, so the determination in S702 is NO, and the control shifts to S703. Since the subsequent operation is the same as the operation of FIG. 7, the description thereof is omitted.

  If there is no “OK” input from the user or a “NO” input from the user in S1003, the cell search means 105A executes a normal cell search in S709.

  Thus, when the mobile communication terminal 401A arrives at the airport and the user turns on the power of the mobile communication terminal 401A, a message asking whether or not the mobile communication terminal 401A has arrived is displayed. In response to this message, a base station search method is adopted in which the cell search method is changed depending on whether there is a positive input from the user. For this reason, the optimal base station search method can be selected in response to user input, and the cell search time can be shortened.

  In this embodiment, the example in which the control shifts to S702 after the control of S1004 has been described. In this case, if the control for deleting the boarding information of the IC chip 107A in S1004 fails and the boarding information cannot be deleted, a determination of YES is made in S702, and the control shifts again to S1002 and S1003, thereby prompting the user to input again. May be repeated. In order to avoid such control, the control flow can be configured so that the control shifts from S1004 to S703 (see circle 5 in FIG. 10). When the control flow is configured in this way, for example, even when the deletion of the boarding information of the IC chip 107A fails, there is no possibility that the control for prompting the user's input is repeated.

  In addition, although all of these 1st-3rd embodiment demonstrated by the example which set the boarding pass of the aircraft as an electronic ticket, the boarding pass of a ship and the boarding ticket of a railroad are also used as an electronic ticket besides this. Etc. can also be set.

It is a functional block diagram which shows the portable communication terminal of 1st Embodiment of this invention. It is a front view of the display apparatus which shows operation | movement of the same mobile communication terminal. It is explanatory drawing which shows the communication system of 2nd Embodiment. It is a functional block diagram which shows the portable communication terminal used with the communication system. It is explanatory drawing which shows the relationship between the communication system of a destination, and a frequency. It is a flowchart which shows the operation | movement at the time of the electronic ticket purchase of the portable communication terminal. It is a flowchart which shows the operation | movement in the destination of the portable communication terminal. It is a flowchart which shows operation | movement when it becomes out of service area in the destination of the portable communication terminal. It is a block diagram which shows the portable communication terminal used with the communication system of 3rd Embodiment of this invention. It is a flowchart which shows the operation | movement in the destination of the portable communication terminal used with the same communication system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Mobile communication terminal 102 Communication part 103 Latest information storage means 103A Latest information storage means 104 Second storage means 104A Memory 105 Base station search means 105A Cell search means 106 Base station search control means 106A Cell search control means 107 First storage means 107A IC chip 108 Antenna 301 Mobile communication system 302 Internet 303 Information providing server 304 Purchase server 305 Wireless base station 306 Packet communication network 307 Automatic ticket gate 401 Mobile communication terminal 401A Mobile communication terminal 402 Control device 402A Control device 403 Power supply control means 404 Main body operation 405 Main body display unit 406 Audio device 901 Display control means

Claims (19)

A communication unit capable of wireless communication with a plurality of communication systems or a plurality of frequencies; and
A first storage means capable of reading and writing the destination of transportation;
Base station search means for searching for connectable radio base stations;
Latest information storage means for receiving the latest information on the communication method and frequency of the destination written in the first storage means and storing it in the second storage means;
And a base station search control means for controlling the operation of the base station search means so as to search for a radio base station based on the communication method and frequency stored in the second storage means after arrival at the destination. Communication terminal. The mobile communication terminal according to claim 1, wherein the first storage means is an IC chip. 3. The mobile communication terminal according to claim 1, wherein the latest information storage unit downloads the latest information related to the communication method and frequency of the destination from a network at a timing when the destination is written. 3. The portable communication terminal according to claim 1, wherein the latest information storage means downloads the latest information related to the destination communication method and frequency from the network at a timing when the automatic ticket gate passes through the entrance. The mobile communication terminal according to claim 1, wherein the transportation facility is an aircraft. 6. The portable communication terminal according to claim 5, wherein the destination communication method and frequency include a communication method and frequency of a destination airport, and a communication method and frequency of a roaming country including the destination airport. The base station search control means controls the base station search means to search for a radio base station based on the communication method and frequency of the destination airport first, and when a connectable radio base station could not be found, 7. The mobile communication terminal according to claim 6, wherein the base station search means is controlled to search for a radio base station based on a communication system and frequency of a roaming country including a destination airport. Power control means for turning off the power when receiving a signal at the entrance of the automatic ticket gate, and permitting completion of activation of the portable communication terminal when receiving a signal at the exit of the automatic ticket gate;
The mobile communication terminal according to any one of claims 1 to 7, further comprising a control unit that operates the base station search control unit when the mobile communication terminal is activated after the destination is arrived, and the mobile communication terminal is activated. After registering with a wireless base station that can be connected at the destination, if the connection is impossible, the base station search control means again sets the communication method and frequency stored in the second storage means. 9. The mobile communication terminal according to claim 1, wherein operation of the base station search means is controlled so as to search for a radio base station based on the base station search means. After the transportation stop, when the mobile communication terminal is turned on after the power is turned on, display control means for displaying a message for matching the mismatch between the place of the stop and the destination stored in the second storage means,
The base station search control means controls the operation of the base station search means when receiving an affirmative input with respect to the message displayed by the display control means. The mobile communication terminal described in 1. When the base station search means cannot find a connectable radio base station as a result of searching for a radio base station based on the communication method and frequency stored in the second storage means, the base station search control means, The mobile communication terminal according to any one of claims 1 to 10, wherein operation of a base station search means is controlled so as to search for a radio base station by switching the communication method and frequency in order. A mobile communication terminal according to any one of claims 1 to 11,
An information providing server that is connected to the Internet and provides the latest information on the communication method and frequency of the destination,
A mobile communication system comprising: a radio base station for communicating with the mobile communication terminal. An automatic ticket gate is provided at an entrance to a transportation facility, which transmits a signal for turning off the power of the mobile communication terminal at the entrance, and transmits a signal for permitting completion of activation of the mobile communication terminal at the exit. The mobile communication system according to claim 12. A storage step for storing the latest information on the communication method and frequency of the destination of the transportation,
A determination step of determining whether or not the destination has been reached;
A base station search method comprising: a base station search step for searching for a connectable radio base station based on the communication method and frequency after it is determined that the destination has been reached in this determination step. The base station search method according to claim 14, wherein the storing step is executed at a timing when the latest information is stored. The search for a radio base station in the base station search step is first performed based on the communication method and frequency of the destination. If a connectable radio base station cannot be found by this search, the destination is located next. The base station search method according to claim 14 or 15, wherein the base station search method is performed based on a national communication system and frequency. The base station search step according to any one of claims 14 to 16, wherein the base station search step is executed when the start of the mobile communication terminal is permitted after arrival at the destination and the mobile communication terminal is started. Method. After the transportation stop, the completion of activation of the portable communication terminal is permitted, and when the activation of the portable communication terminal is completed, a display step for displaying a message for collating mismatches between the location of the stop and the destination stored in the storage step is provided. Prepared,
The base station search method according to claim 14, wherein the base station search step is executed when an affirmative input is received for the message. As a result of searching for a radio base station in the base station search step, when a connectable radio base station cannot be found, the communication method and frequency are switched in order, and a second base station search for further searching for the radio base station is performed. The base station search method according to claim 14, further comprising a step.

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