JP6513466B2 - Communication terminal, control method of communication terminal, and control program - Google Patents

Description

  The present invention relates to a communication terminal including a communication unit that performs wireless communication and an operation unit that operates at a set clock frequency, and more specifically, the clock frequency of the operation unit interferes with the use frequency of the wireless communication The present invention relates to a communication terminal provided with a function to prevent communication.

  In a communication terminal equipped with various devices in addition to a communication unit that performs wireless communication, such as a mobile phone, it is known that a clock signal that operates the device interferes with the frequency used for wireless communication to cause a communication failure. Technology has been developed to avoid such obstacles. For example, Patent Document 1 below discloses a technique for adjusting a clock signal frequency of a central processing unit (CPU) so that mutual interference with a communication channel does not occur when a communication channel is designated from a base station. It is done.

JP-A-7-303079 (published on November 14, 1995)

  Recently, MVNOs (Mobile Virtual Network Operators) and the like are moving into the telecommunications business, and telecommunications carriers that did not exist at the time of purchasing a telecommunications terminal may be used. Also, in recent years, SIM (Subscriber Identity Module) lock-free communication terminals are also spreading, and it is becoming common for carriers that were not used at the purchasing site to be used later. .

  As described above, in recent years, the number of communication carriers that can use one communication terminal is increasing, and the number of communication carriers to be used is being increased. However, in the technique of Patent Document 1, it is necessary to record an appropriate clock signal frequency in advance, so it is difficult to cope with the increase and switching of communication carriers.

  The present invention has been made in view of this problem, and an object thereof is to flexibly cope with an increase or switching of a telecommunications carrier and to prevent the clock frequency for operating the operation unit from interfering with the communication frequency band. It is providing a communication terminal etc. which can be adjusted to a frequency.

  In order to solve the above-mentioned subject, a communication terminal concerning one mode of the present invention is a communication terminal provided with a communication part which performs wireless communications, and an operation part which operates with a set clock frequency, Specify the clock frequency according to the telecommunications carrier used for the wireless communication via the communication unit by accessing the management server that manages the clock frequency that does not interfere with the telecommunications frequency band used by the telecommunications carrier for each telecommunications carrier And an operation clock setting unit for operating the operation unit at the clock frequency specified by the frequency specification unit.

  Further, in order to solve the above problems, a control method of a communication terminal according to an aspect of the present invention includes a communication unit that performs non-wireless communication and an operation unit that operates at a set clock frequency. A communication control method for a terminal, comprising: accessing a management server that manages, for each communication carrier, a clock frequency that does not interfere with a frequency band used by the communication carrier, the communication business using wireless communication via the communication unit And an operation clock setting step of operating the operation unit at the clock frequency specified in the frequency specifying step.

  According to each of the above aspects of the present invention, the clock frequency for operating the operation unit can be adjusted to a frequency that does not interfere with the communication frequency band, flexibly coping with the increase or switching of communication carriers. Play.

It is a block diagram which shows the example of a principal part structure of the communication terminal concerning one reference example of this invention. It is a figure which shows an example of the corresponding frequency information which the said communication terminal uses for setting of a clock frequency. It is a flowchart which shows an example of the process performed at the time of starting of the said communication terminal. It is a flowchart which shows an example of the process performed at the time of starting of the communication terminal which can set a clock frequency, even when SIM card is not attached. It is a block diagram which shows an example of a principal part structure of the communication terminal which comprises the communication system which concerns on one Embodiment of this invention, and a management server. It is a figure which shows an example of the server side corresponding frequency information which the said management server stores. It is a flowchart which shows an example of the process performed at the time of starting of the said communication terminal. It is a figure which shows an example of the server side corresponding | compatible frequency information corresponding to a roaming.

[Reference Example 1]
Hereinafter, a reference example of the present invention will be described in detail based on FIGS. 1 to 4.

[Configuration of communication terminal]
First, the configuration of the communication terminal 1 according to the present reference example will be described based on FIG. FIG. 1 is a block diagram showing an example of the main configuration of the communication terminal 1. As illustrated, the communication terminal 1 includes a control unit 10, a storage unit (predetermined recording medium) 20, a SIM card (predetermined recording medium) 30, a reference clock generation unit 40, a wireless communication unit (communication unit) 50, and The operation unit 60 is provided. Although the SIM card 30 is described in the same drawing as the other blocks that are components of the communication terminal 1, strictly speaking, the communication terminal 1 is provided with a SIM card slot (not shown), and the SIM card 30 is not shown. Is attached here.

  The communication terminal 1 is a terminal device provided with a wireless communication function. More specifically, the communication terminal 1 wirelessly communicates with another device via the base station of the communication carrier recorded in the attached SIM card 30. The communication terminal 1 only needs to have a function of performing wireless communication with another device via a base station of a predetermined communication carrier, and may be, for example, a device such as a mobile phone or a smartphone.

  The control unit 10 integrally controls each unit of the communication terminal 1, and includes an identification information acquisition unit (identification information recording processing unit) 11, a frequency identification unit 12, an operation clock setting unit 13, and a wireless control unit 14. Including.

  The identification information acquisition unit 11 acquires, from a predetermined recording medium, country identification information that identifies a country and provider identification information that identifies a telecommunications carrier. More specifically, the identification information acquisition unit 11 acquires the country code stored in the SIM card 30 as the country identification information, and the carrier code stored in the SIM card 30 in the same manner as the above-described provider identification information. Get as. Then, the identification information acquisition unit 11 outputs the acquired information (country code and carrier code) to the frequency identification unit 12.

  The frequency specifying unit 12 specifies a clock frequency for operating the operating unit 60. Specifically, when the communication terminal 1 is activated, the frequency identification unit 12 identifies the initial value of the clock frequency included in the corresponding frequency information 22 as the clock frequency for operating the operation unit 60. Further, when the country code and the telecommunications carrier code are output from the identification information acquisition part 11, the frequency specifying part 12 refers to the corresponding frequency information 22 and a clock corresponding to the output country code and the telecommunications carrier code. Identify the frequency. Then, the frequency specifying unit 12 outputs the clock frequency specified as described above to the operation clock setting unit 13.

  The operation clock setting unit 13 operates the operation unit 60 at a frequency that does not interfere with the frequency band used for wireless communication (does not affect the frequency channel used by the wireless communication unit 50). One is provided for. That is, when a plurality of operation units 60 are provided, the operation clock setting unit 13 is provided for each of them. Specifically, operation clock setting unit 13 receives a reference clock signal generated by reference clock generation unit 40 as an input, generates an input clock that is a clock signal of a frequency that does not interfere with the communication frequency band, and inputs it to operation unit 60. Do. Then, the operation unit 60 generates an operation clock by multiplying the above input clock by an operation clock generation unit (not shown), and operates with this operation clock. When a plurality of operation units 60 operate at the same clock frequency, one operation clock setting unit 13 may be provided for the plurality of operation units 60.

  The radio control unit 14 performs position registration of the communication terminal 1 in the base station of the communication carrier. This position registration enables the communication terminal 1 to wirelessly communicate with another device via the wireless communication unit 50.

  The storage unit 20 stores various data handled by the communication terminal 1. In the illustrated example, the country / business operator identification information 21 and the corresponding frequency information 22 are stored in the storage unit 20. Note that the storage unit 20 may be a recording medium (recording device) that is removable from the communication terminal 1. The country / business identification information 21 is information (business identification information) indicating the country where the communication terminal 1 is in wireless communication and the communication carrier used for the wireless communication. The details of the country / business operator identification information 21 will be described in a reference example 2. Further, the corresponding frequency information 22 is information indicating clock frequencies that do not interfere with the communication frequency band used by the communication carrier for each communication carrier.

  The SIM card 30 is a recording medium in which various information necessary for the communication terminal 1 to perform wireless communication via the wireless communication unit 50 is recorded. A country code and a carrier code are recorded in the SIM card 30 in addition to information such as a telephone number.

  The reference clock generation unit 40 generates a reference clock signal as a reference of a clock signal for operating the operation unit 60 and outputs the reference clock signal to the control unit 10.

  The wireless communication unit 50 is used by the communication terminal 1 to wirelessly communicate with another device, and performs various processes related to transmission and reception of a wireless frequency signal. Before starting wireless communication with another device, the wireless communication unit 50 accesses the base station of wireless communication via an antenna (not shown) to perform location registration of the communication terminal 1. As a result, it is possible to perform wireless communication with another device via the base station according to the current position of the communication terminal 1.

  The operating unit 60 operates according to the control of the control unit 10. In the illustrated example, one operating unit 60 is shown, but the number of operating units 60 is not particularly limited as described above. The operating unit 60 may be any device (device) that operates at a set clock frequency, and may be, for example, an LCD (Liquid Crystal Display) or a camera.

[Example of corresponding frequency information]
The corresponding frequency information 22 is not particularly limited as long as it indicates a clock frequency which does not interfere with the communication frequency band used by each communication carrier for each communication carrier, but may be, for example, information as shown in FIG. . FIG. 2 is a diagram showing an example of the corresponding frequency information 22. As shown in FIG. The illustrated corresponding frequency information 22 is information indicating a clock frequency for each operation unit 60 corresponding to a combination of a country code and a telecommunications carrier code (country specific carrier code). In the illustrated example, the clock frequencies of the LCD and the camera are shown, but the corresponding frequency information 22 may indicate the clock frequency corresponding to the operation unit 60 provided in the communication terminal 1.

  The corresponding frequency information 22 shown in the drawing also includes a clock frequency not associated with the country code and the telecommunications carrier code. These clock frequencies are the above-mentioned "initial value", and when the communication terminal 1 is activated, first, each operation unit 60 is operated with this initial value. Then, when the country code and the telecommunications carrier code are read out from the SIM card 30, the clock frequency corresponding to the combination of the read out codes is specified from the corresponding frequency information 22, and thereby the clock for operating each operation unit 60 The frequency is switched.

  For example, if the country code read from the SIM card 30 is A and the carrier code is 002, then the clock frequency for operating the LCD (operation unit 60) changes from the initial value "f000" to "f002". It is switched. Similarly, the clock frequency for operating the camera (operation unit 60) is switched from the initial value "f010" to "f012". Since the clock frequency after these switching is a frequency that does not interfere with the radio frequency band, performing this switching makes it possible to perform wireless communication in a good communication environment in which the problem of interference does not occur. . The LCD needs to be started when the communication terminal 1 starts up, and it is necessary to perform the switching as described above. However, the operation unit 60 (for example, a camera) which does not need to start operation at the time of activation of the communication terminal 1 may start operation at a frequency that does not interfere with the radio frequency band without starting operation at the initial value.

[Flow of processing]
Next, the flow of processing (a control method of the communication terminal) executed by the communication terminal 1 will be described based on FIG. FIG. 3 is a flowchart showing an example of processing performed when the communication terminal 1 is activated. Here, for the sake of simplicity, an example in which the clock frequency is set for one operation unit 60 will be described, but the clock frequency is set for each operation unit 60.

  When the communication terminal 1 is activated, the frequency specifying unit 12 reads the initial value of the clock frequency from the corresponding frequency information 22 and notifies the operation clock setting unit 13 to set the clock frequency for operating the operation unit 60 (S1 ). Subsequently, the operation clock setting unit 13 starts up the operation unit 60 (S2), and causes the operation unit 60 to operate at the notified clock frequency (initial value). The processing of S1 and S2 may be omitted for an operation unit 60 such as a camera that does not need to be activated when the communication terminal 1 is activated.

  In addition, when the communication terminal 1 is activated, the identification information acquisition unit 11 acquires the country code and the telecommunications carrier code from the SIM card 30 (S3, identification information acquisition step), and notifies the frequency identification unit 12. Then, the frequency identification unit 12 determines whether the clock frequency corresponding to both of the notified codes is registered in the corresponding frequency information 22 (S4).

  Here, when it is determined that it is not registered (NO in S4), the radio control unit 14 communicates with the base station with the clock frequency of the operation unit 60 as the initial value, and performs position registration of the communication terminal 1 (S8 ). As a result, the communication terminal 1 becomes capable of wireless communication, and the process shown in the drawing ends.

  On the other hand, when it is determined that the clock frequency is registered in S4 (YES in S4), the frequency specifying unit 12 specifies the clock frequency registered in the corresponding frequency information 22 (S5), and the specified clock frequency is equal to the initial value (S6).

  Here, if it is determined that the value is equal to the initial value (YES in S6), the process proceeds to S8 described above. On the other hand, when it is determined that the value is different from the initial value (NO in S6), the frequency identification unit 12 notifies the operation clock setting unit 13 of the clock frequency identified in S5. Then, the operation clock setting unit 13 changes the clock frequency for operating the operation unit 60 to the notified clock frequency (S7, operation clock setting step).

  Also, after S7, the wireless control unit 14 communicates with the base station to perform location registration of the communication terminal 1 (S8). In S8 after S7, since the clock frequency of the operation unit 60 has already been switched to a frequency that does not interfere with the frequency band used for wireless communication, it is possible to complete position registration reliably in a short time. The effect of switching to a frequency that does not interfere with the frequency band used for wireless communication extends not only to location registration but also to, for example, waiting for incoming calls, calls, or other communications in general. That is, by the above-mentioned switching, the communication terminal 1 can perform all communications in a state without interference (or with little interference).

Reference Example 2
Another reference example of the present invention will be described based on FIG. For convenience of explanation, the same reference numerals are appended to members having the same functions as the members described in the reference example, and the description thereof will be omitted. In this reference example, as in the case where the SIM card 30 is not attached to the communication terminal 1, for example, when the country code and the telecommunications carrier code can not be obtained from the SIM card 30, these are obtained from the predetermined data area. An example of acquiring the code of will be described. The configuration of the communication terminal 1 of this reference example is the same as that of the reference example 1 (see FIG. 1).

[Flow of processing]
A flow of processing (a control method of the communication terminal) executed by the communication terminal 1 of the present reference example will be described based on FIG. FIG. 4 is a flowchart showing an example of processing performed when the communication terminal 1 is activated. In FIG. 4, the same processing as that of FIG. 3 is assigned the same reference numeral, and the description thereof is omitted. Further, in FIG. 4, as in FIG. 3, an example of setting the clock frequency for one operation unit 60 will be described, but the setting of the clock frequency is performed for each of the operation units 60. And although S6 of FIG. 3 is abbreviate | omitted in the example of FIG. 4, you may perform this process.

  When the communication terminal 1 is activated, the identification information acquisition unit 11 determines whether the SIM card 30 is recognized (S10). Here, when it is determined that it is recognized (YES in S10), the country code and the telecommunications carrier code are acquired from the SIM card 30 (S3, identification information acquisition step). The subsequent processing is the same as that of FIG. 3, and the clock frequency for operating the operation unit 60 is changed to the frequency corresponding to the acquired country code and carrier code, and then position registration is performed (S4 to S4). S8). Although omitted in FIG. 4, also in FIG. 4, when the communication terminal 1 is activated, the clock frequency is set to the initial value and the operation unit 60 is activated as in the example of FIG.

  On the other hand, if it is determined in S10 that the SIM card 30 is not recognized (NO in S10), the identification information acquisition unit 11 may perform position registration even if the SIM card 30 is not attached (SIM) Whether communication is possible without the card 30) is judged (S11). Note that this determination may be performed based on, for example, a preset flag (the value when performing position registration is ON, the value when not performing is OFF). In addition, the determination of S11 may be performed prior to S10.

  Here, when it is set that the position registration is not performed (NO in S11), the processing is ended without performing the position registration. On the other hand, when it is set to perform position registration (YES in S11), the identification information acquisition unit 11 acquires a country code and a telecommunications carrier code from a predetermined data area (S12, identification information acquisition step). The subsequent processing is the same as that of FIG. 3, and the clock frequency for operating the operation unit 60 is changed to the frequency corresponding to the acquired country code and carrier code, and then position registration is performed (S4 to S4). S8).

  The “predetermined data area” in S12 may be a data area in the storage unit 20. For example, as shown in the example of FIG. 1, when the country code and the telecommunications carrier code are stored in the storage unit 20 as the country / business operator identification information 21, the country / business identification information 21 in the storage unit 20 is The storage area is the above-mentioned predetermined data area. Further, the country code and the telecommunications carrier code of the predetermined data area may be read out and recorded when the identification information acquisition unit 11 is mounted on the SIM card 30. Note that the execution subject of the recording process may be a block different from the identification information acquisition unit 11. Furthermore, in this case, whether or not each code is recorded (copied) in the predetermined data area from the SIM card 30 may be set by, for example, a write flag or the like. Thereby, when the SIM card 30 is loaded with the write flag ON, each code can be automatically stored in a predetermined data area.

  Further, the acquisition source of the country code and the telecommunications carrier code recorded in the predetermined data area is not limited to the SIM card 30. For example, when these codes are stored in a recording medium such as NFC (Near Field Communication) tag or USB (Universal Serial Bus) memory, they are acquired from such a recording medium and stored in a predetermined data area. You may leave it. In addition, after the communication terminal 1 is in a state capable of wireless communication, it may be acquired from the base station of the communication carrier. The predetermined data area may exist outside the communication terminal 1. In this case, in S12, the predetermined data area outside the communication terminal 1 is accessed to acquire each code. Become.

Embodiment 1
In the present embodiment, an example of a communication system in which the clock frequency for operating the operation unit can be specified by accessing the management server will be described based on FIGS. For convenience of explanation, the same reference numerals are appended to members having the same functions as the members described in the reference example, and the description thereof will be omitted.

〔System configuration〕
The configuration of the communication system of the present embodiment will be described based on FIG. FIG. 5 is a block diagram showing an example of the main configuration of the communication terminal 100 and the management server 200 that constitute the communication system 300. As shown in FIG. The communication system 300 includes a communication terminal 100 and a management server 200 that can mutually communicate via a communication network. Although only one communication terminal 100 is illustrated in the illustrated example, the number of the communication terminals 100 included in the communication system 300 is not particularly limited, and may be two or more. Further, the communication network may be any one as long as the communication terminal 100 and the management server 200 can mutually communicate via this communication network, and may be, for example, the Internet or the like.

  The communication terminal 100 has substantially the same configuration as the communication terminal 1 of the above reference example, but the frequency identification unit 12 identifies the frequency identification unit 112 and the operation clock setting unit 13 identifies the country / business operator in the operation clock setting unit 113. The difference is that the information 21 is changed to the terminal identification information 121. The country / business operator identification information 21 may be stored in the storage unit 20 of the communication terminal 100.

  The frequency specifying unit 112 specifies a clock frequency for operating the operating unit 60. The frequency specifying unit 112 operates the operating unit 60 with the initial value of the clock frequency included in the corresponding frequency information 22 as in the frequency specifying unit 12 of the reference example. Further, when the country code and the telecommunications carrier code are output from the identification information acquisition part 11, the frequency specifying part 112 refers to the corresponding frequency information 22 and a clock corresponding to the output country code and the telecommunications carrier code Identify the frequency.

  The frequency specifying unit 112 accesses the management server 200 when the corresponding clock frequency is not registered in the corresponding frequency information 22 and specifies the clock frequency registered in the management server 200. It is different from 12. Specifically, the frequency identification unit 112 transmits the country code, the telecommunications carrier code, and the terminal identification information 121 output from the identification information acquisition unit 11 to the management server 200, and manages the clock frequency corresponding to the information. It receives from the server 200. This clock frequency is a frequency that does not interfere with the frequency band used for wireless communication. Then, the frequency identification unit 112 outputs the acquired clock frequency to the operation clock setting unit 113. The location of the management server 200, which is the access destination, may be identified by, for example, a URI (Uniform Resource Identifier) or the like.

  The frequency specifying unit 112 also functions as an information updating unit that adds the acquired clock frequency to the corresponding frequency information 22 when the clock frequency is acquired from the management server 200. As a result, when performing wireless communication using the same telecommunications carrier thereafter, it becomes possible to set the clock frequency without accessing the management server 200.

  Similar to the operation clock setting unit 13, the operation clock setting unit 113 operates the operation unit 60 at a clock frequency that does not interfere with the communication frequency band. The operation clock setting unit 113 also functions as a stop control unit for stopping the operation of the operation unit 60 during a period until the frequency specifying unit 112 accesses the management server 200 to specify the clock frequency. As a result, the interference with the operation clock of the operation unit 60 prevents the access to the management server 200 from being blocked. Of course, it is not necessary to stop all the operating units 60, and it is sufficient to stop only the operating unit 60 operating at a clock frequency that interferes with the frequency band of wireless communication. In this case, the presence or absence of interference is determined for each operation unit 60, and the operation units determined to cause interference are stopped. The function as the stop control unit may be realized by a block different from the operation clock setting unit 113.

  The terminal identification information 121 is information for identifying the communication terminal 100. Here, an example in which IMEI (International Mobile Equipment Identity), which is terminal-specific manufacturing number information capable of identifying the model of the communication terminal 100, is used as the terminal identification information 121 will be described. However, the terminal identification information 121 may be any information that can identify the communication terminal 100, and is not limited to IMEI.

  The management server 200 is a server that manages, for each communication carrier, a clock frequency that does not interfere with the use frequency band of the communication carrier, and includes a control unit 210, a storage unit 220, and a communication unit 250.

  The control unit 210 centrally controls each unit of the management server 200 and includes a frequency notification unit 211. The frequency notification unit 211 notifies the communication terminal 100 of a clock frequency corresponding to a communication carrier that the communication terminal 100 uses for wireless communication. Specifically, the frequency notification unit 211 receives the country code, the carrier code, and the terminal identification information 121 transmitted by the frequency identification unit 112 of the communication terminal 100. Then, the clock frequency corresponding to the received information described above is specified with reference to the server-side corresponding frequency information 221, and the specified clock frequency is notified to the communication terminal 100.

  The storage unit 220 stores various data handled by the management server 200. In the illustrated example, the server-side frequency information 221 is stored in the storage unit 220. Similar to the corresponding frequency information 22, the server side corresponding frequency information 221 is information indicating, for each communication provider, a clock frequency which does not interfere with the communication frequency band used by the communication provider. However, server-side corresponding frequency information 221 is different from corresponding frequency information 22 in that a clock frequency corresponding to the model of communication terminal 100 is shown. This is because the management server 200 can access various types of communication terminals 100, and by referring to the server-side compatible frequency information 221, it is possible to specify a clock frequency according to the type of the accessed communication terminal 100. It is for.

  The server-side corresponding frequency information 221 is updated each time a new communication carrier (for example, a virtual mobile carrier: MVNO: Mobile Virtual Network Operator) is registered. This makes it possible to adjust the clock frequency even when a communication carrier not registered in the corresponding frequency information 22 of the communication terminal 100 is used.

  The communication unit 250 performs various processes for the management server 200 to communicate via the network. The connection with the network may be wireless or wired.

[Example of server-side compatible frequency information]
The server-side corresponding frequency information 221 is not particularly limited as long as it indicates a clock frequency corresponding to the country, the communication carrier, and the model of the communication terminal 100, but may be information as shown in FIG. 6, for example.

  FIG. 6 is a diagram showing an example of the server side corresponding frequency information 221. As shown in FIG. The illustrated server side corresponding frequency information 221 is information indicating a clock frequency for each operation unit 60 corresponding to a combination of a country-specific carrier code (combination of a country code and a communication carrier code) and a model. The illustrated server-side compatible frequency information 221 includes “IMEI” and “compatible model” (specifically, identification information for identifying the model of the communication terminal 100) corresponding to IMEI as model information. It is done.

  Therefore, the clock frequency for each operation unit 60 can be specified from the country code, the telecommunications carrier code, and the IMEI by referring to the illustrated server-side corresponding frequency information 221. For example, if the country code is A, the carrier code is 002, and the IMEI is I00112, the clock frequency for operating the LCD is f002101, and the clock frequency for operating the camera is f002111.

  In the case where the clock frequency is specified using IMEI as in the above example, the information of “compatible model” is not necessary. Alternatively, identification information of a model may be stored in advance in the storage unit 20 or the like, and a clock frequency may be specified from this identification information. In this case, the information of IMEI is unnecessary. For example, when the stored identification information is U0010, the clock frequencies of the LCD and the camera are specified as f001001 and f001011 from the server side corresponding frequency information 221 shown in the figure using this identification information instead of IMEI. be able to.

  Alternatively, the management server 200 may be provided for each model of the communication terminal 100, and the communication terminal 100 may be made to access the management server 200 according to the model. In this case, information related to the model in the server side corresponding frequency information 221 Can be omitted.

[Flow of processing]
A flow of processing (a control method of the communication terminal) executed by the communication terminal 100 according to the present embodiment will be described based on FIG. FIG. 7 is a flowchart showing an example of processing performed when the communication terminal 100 is activated. In FIG. 7, the same processes as in FIG. 3 have the same reference numerals, and the description thereof will be omitted. Further, in FIG. 7, as in FIG. 3, an example in which the clock frequency is set for one operation unit 60 will be described, but the clock frequency is set for each operation unit 60. And although S6 of FIG. 3 is abbreviate | omitted in the example of FIG. 7, you may perform this process.

  When it is determined in S4 that the clock frequency corresponding to the country code and the telecommunications carrier code acquired in S3 is not registered in the corresponding frequency information 22 (NO in S4), the frequency identification unit 112 determines that the operation clock setting unit Notify that to 113. Then, the operation clock setting unit 113 that has received this notification stops the operation of the operation unit 60 activated in S2 (S20). If the operation unit 60 activated in S2 does not generate noise (the clock frequency does not interfere with the communication frequency band), the process of S20 may be omitted.

  Subsequently, the wireless control unit 14 communicates with the base station to perform location registration of the communication terminal 100 (S21). Since the operation unit 60 that generates noise is stopped in S20, in S21, position registration can be reliably completed in a short time.

  When the wireless communication is enabled by the position registration of S21, the frequency identifying unit 112 accesses the management server 200 and acquires the clock frequency registered in the management server 200 (S22, frequency identification step). Further, the frequency identification unit 112 notifies the operation clock setting unit 113 of the clock frequency acquired in S22. Then, the operation clock setting unit 113 switches the clock frequency of the operation unit 60 stopped in S20 to the clock frequency acquired in S22 (S23, operation clock setting step) and restarts (S24). Further, the frequency specifying unit 112 registers the clock frequency acquired in S22, the country code acquired in S3 and the communication room hall person code in association with the corresponding frequency information 22. As a result, the corresponding frequency information 22 is updated (S25), and the illustrated process ends.

  In S3 above, the country code and carrier code are obtained from the SIM card 30, but if communication with the base station is possible, the country code and carrier code are obtained from the base station. You may Although this configuration is premised that interference before adjustment of the clock frequency is such that communication with the base station is possible, the clock can also be used by a different carrier than that recorded on the SIM card 30. There is an advantage that frequency is possible. A carrier different from one recorded in the SIM card 30 is used, for example, at the time of roaming.

[Roaming support]
When the communication terminal 100 is brought out overseas, roaming is performed so that communication is performed at a communication frequency different from that used in Japan. For this reason, even when interference does not occur in a certain area, when the communication terminal 100 is moved, interference may occur and communication may be interrupted.

  Therefore, here, an example of the server-side corresponding frequency information 221 that makes it possible to adjust the clock frequency appropriately even at the roaming destination will be described based on FIG. FIG. 8 is a diagram showing an example of the server side corresponding frequency information 221 corresponding to roaming. The server-side corresponding frequency information 221 in FIG. 8 is different from the example in FIG. 6 in that information on the roaming destination is added.

  More specifically, in the example of FIG. 8, a country code is associated with each model, and a communication carrier code is further associated with the country code. For example, in the illustrated example, the country code of C is associated with the model of U0010, and three communication carrier codes of 004 to 006 are associated with the country code. This indicates that the model of U 0010 is a model that can be used in country C other than country A, and that in country C, 004 to 006 communication carriers can be used. Note that which communication carrier is used may be specified based on position information acquired by GPS, as long as the communication terminal 100 can use GPS (Global Positioning System), for example. Also, for example, if the carrier has been used in the country in the past, it may be specified using its history information, or may be specified by accessing the base station of the carrier. . In addition, one telecommunications carrier code corresponding to one country code may be registered, and in this case, the specification as described above is unnecessary.

  Then, the clock frequencies of the LCD and the camera are associated with each communication carrier code. These clock frequencies are frequencies that do not interfere with the communication frequency band used by the telecommunications carrier of the telecommunications carrier code. Thereby, even at the roaming destination, the operation unit 60 can be operated at a clock frequency that does not interfere with the communication frequency band. For example, the communication terminal 100 of the model of U0011 which has been communicating using the communication carrier 001 in the country A is brought into the country D, and the communication carrier 008 which has been used in the country D in the past is used. Consider the case of communication. In this case, the communication terminal 100 executes the processing after S20 of FIG. 7 in response to the detection of roaming. At this time, in S22, the frequency identification unit 112 accesses the management server 200 and identifies a clock frequency corresponding to the model of the communication terminal 100. Specifically, the frequency specifying unit 112 notifies the management server 200 of the model of the communication terminal 100 and the fact that it has roamed. Then, the frequency notification unit 211 of the management server 200 refers to the server-side compatible frequency information 221 of FIG. 8 to select the clock frequency (LCD: f001105, camera: f001115) of the roaming destination associated with the notified model. It identifies and notifies the communication terminal 100. When a plurality of telecommunications carrier codes are associated with one country code, position information, history information, and the like may be acquired from the communication terminal 100, and one telecommunications carrier code may be specified. As a result, the clock frequency of the operation unit 60 can be properly adjusted even in country D, and a good communication environment can be maintained.

  In addition, the corresponding frequency information 22 as shown in FIG. 2 may also include information on the roaming destination. In this case, the frequency specifying unit 12 of the communication terminal 1 can specify the clock frequency after roaming, which is associated with the carrier code before roaming, with reference to the corresponding frequency information 22. This makes it possible to specify the clock frequency according to the roaming destination without accessing the management server 200.

[Modification]
In each of the above-described reference examples and embodiments, an example has been described in which the clock frequency for operating the operation unit 60 is specified using both the country code and the carrier code. However, if it is not necessary to consider movement across countries, the clock frequency may be specified only from the carrier code (carrier identification information).

  In each of the reference examples and embodiments described above, the clock frequency is set when the communication terminal 1 or 100 is started, but this setting may be performed at the first start, and the setting needs to be performed each time the start is performed. There is no. However, when the SIM card is replaced or roaming is performed, it may be necessary to reset the clock frequency. For this reason, after setting of the clock frequency is performed once, it is preferable to set the clock frequency in response to replacement of the SIM card or execution of roaming.

[Example of software implementation]
The control blocks (especially the control unit 10) of the communication terminals 1 and 100 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or by using a CPU (Central Processing Unit) It may be realized by software.

  In the latter case, the communication terminals 1 and 100 are a CPU that executes instructions of a program that is software that realizes each function, a ROM (Read Only Memory) in which the program and various data are readably recorded by a computer (or CPU). Or a storage device (these are referred to as "recording media"), a RAM (Random Access Memory) for developing the program, and the like. The object of the present invention is achieved by the computer (or CPU) reading the program from the recording medium and executing the program. As the recording medium, a “non-transitory tangible medium”, for example, a tape, a disk, a card, a semiconductor memory, a programmable logic circuit or the like can be used. The program may be supplied to the computer via any transmission medium (communication network, broadcast wave, etc.) capable of transmitting the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave, in which the program is embodied by electronic transmission.

[Summary]
A communication terminal (100) according to aspect 1 of the present invention is a communication terminal including a communication unit (wireless communication unit 50) performing wireless communication, and an operation unit (60) operating at a set clock frequency. Communication network used for wireless communication via the communication unit by accessing the management server (200) that manages, for each communication carrier, a clock frequency that does not interfere with the communication frequency band used by the communication carrier. A frequency specifying unit (112) for specifying a corresponding clock frequency, and an operation clock setting unit (113) for operating the operating unit at the clock frequency specified by the frequency specifying unit.

  According to the above configuration, by accessing the management server, the clock frequency according to the communication carrier used for wireless communication via the communication unit (clock frequency that does not interfere with the communication frequency band used by the communication carrier) And operate the operating unit at that clock frequency. Therefore, even when a communication carrier whose corresponding clock frequency is not registered in the communication terminal is used, it is possible to set the clock frequency appropriately. In other words, according to the above configuration, the clock frequency for operating the operation unit can be adjusted to a frequency that does not interfere with the communication frequency band, flexibly coping with the increase or switching of the communication carriers. . The operation clock setting unit may switch the clock frequency if the operation unit is in operation, and set the clock frequency before the operation start if the operation unit is not in operation.

  The communication terminal according to aspect 2 of the present invention is the stop control section for stopping operation of the operation section during the period until the operation clock setting section identifies the clock frequency identified by the frequency identification section in aspect 1 above. (Operation clock setting unit 113) is provided.

  According to the above configuration, the operation of the operation unit is stopped during the period until the setting of the clock frequency. Therefore, it is possible to prevent the clock frequency of the operation unit from interfering with wireless communication (access to the management server, etc.) during the period until the setting of the clock frequency, whereby the setting of the clock frequency can be performed quickly and reliably. It can be carried out.

  The communication terminal according to aspect 3 of the present invention includes the storage unit (20) for storing corresponding frequency information (22) indicating, for each communication carrier, a clock frequency that does not interfere with the communication frequency band in the above aspect 1 or 2. The above-mentioned frequency specific part specifies a clock frequency from the above-mentioned corresponding frequency information, when a clock frequency according to a telecommunications carrier used for wireless communications via the above-mentioned communication part can be specified from the above-mentioned corresponding frequency information.

  According to the above configuration, it is possible to specify the clock frequency in a short time as compared to the case of accessing the management server, and it is a case where interference occurs to a degree that communication with the management server is difficult. It is also possible to set the clock frequency.

  The communication terminal according to one aspect of the present invention includes the information updating unit (frequency identification unit 112) that adds the clock frequency identified by accessing the management server to the corresponding frequency information in aspect 3 above. It is also good.

  According to the above configuration, when using the same communication carrier next time, an appropriate clock frequency can be specified from the corresponding frequency information without accessing the management server.

  Further, in the communication terminal according to one aspect of the present invention, in any of the above aspects, the frequency specifying unit accesses the management server when roaming is performed, and the communication terminal according to the roaming destination communication carrier The clock frequency may be specified.

  According to the above configuration, since the clock frequency according to the carrier of the roaming destination is specified at the time of roaming, it is possible to prevent the clock frequency of the operation unit from interfering with the communication frequency band even after the roaming.

  A control method of a communication terminal according to a fourth aspect of the present invention includes controlling a communication terminal (100) including a communication unit (50) performing wireless communication, and an operation unit (60) operating at a set clock frequency. A communication business using wireless communication via the communication unit by accessing a management server (200) that manages, for each communication carrier, a clock frequency that does not interfere with the frequency band used by the communication carrier. And a clock frequency setting step (S23) for operating the operation unit at the clock frequency specified in the frequency specifying step. According to the control method, the same function and effect as those of the first aspect can be obtained.

  The communication terminal according to each aspect of the present invention may be realized by a computer. In this case, the communication terminal is realized by the computer by causing the computer to operate as each unit (software element) included in the communication terminal. A control program of a communication terminal and a computer readable recording medium recording the same also fall within the scope of the present invention.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

  The present invention can be used for a communication terminal that performs wireless communication.

1 Communication terminal 11 Identification information acquisition unit (identification information recording processing unit)
12 frequency identification unit 13 operation clock setting unit 20 storage unit (predetermined recording medium)
21 country, business identification information (business identification information)
22 Applicable frequency information 30 SIM card (prescribed recording medium)
50 wireless communication unit (communication unit)
60 operating unit 100 communication terminal 112 frequency identifying unit (information updating unit)
113 Operation clock setting unit (stop control unit)

Claims (4)

A communication terminal comprising: a communication unit that performs wireless communication; and an operation unit that operates at a set clock frequency,
By accessing a management server that manages, for each communication carrier, a clock frequency that does not interfere with the communication frequency band used by the communication carrier, a clock frequency according to the communication carrier used for wireless communication via the communication unit A frequency identification unit to identify
An operation clock setting unit for operating the operation unit at the clock frequency specified by the frequency specification unit;
A stop control unit for stopping the operation of the operation unit;
The operation clock setting unit activates the operation unit that needs to be started when the communication terminal is activated among the operation units using the initial value as the clock frequency,
The stop control unit determines whether the activated operation unit is an operation unit operating at a clock frequency that interferes with the frequency band of wireless communication. If the operation unit interferes, the stop control unit determines the frequency of the operation unit. A communication terminal characterized in that it is stopped during a period until a clock frequency is specified in the unit. A storage unit that stores corresponding frequency information indicating, for each communication carrier, a clock frequency that does not interfere with the communication frequency band;
An information updating unit that adds the clock frequency specified by accessing the management server to the corresponding frequency information;
The above-mentioned frequency specific part specifies the clock frequency from the above-mentioned corresponding frequency information, when the clock frequency according to the telecommunications carrier used for wireless communications via the above-mentioned communication part can be specified from the above-mentioned corresponding frequency information The communication terminal according to claim 1 . A control method of a communication terminal, comprising: a communication unit that performs wireless communication; and an operation unit that operates at a set clock frequency,
Identify the clock frequency according to the telecommunications carrier used for wireless communication via the communication unit by accessing the management server that manages, for each telecommunications carrier, a clock frequency that does not interfere with the frequency band used by the telecommunications carrier Frequency identification step
An operation clock setting step of operating the operation unit at the clock frequency specified in the frequency specifying step;
A stop control step of stopping the operation of the operation unit;
In the operation clock setting step, among the operation units, the operation units that need to be started when the communication terminal is activated are activated using the initial value as the clock frequency,
In the stop control step, it is determined whether the activated operating unit is an operating unit operating at a clock frequency that interferes with the frequency band of wireless communication, and if the operating unit interferes, the operating unit is specified as the frequency specified above. A control method of a communication terminal characterized by stopping during a period until a clock frequency is specified in a step .   A control program for causing a computer to function as the communication terminal according to claim 1, the control program for causing a computer to function as the frequency identification unit and the operation clock setting unit.

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