JP6068952B2 - Mobile terminal and control method - Google Patents

Description

  The present invention relates to a technology related to a portable terminal having a tethering function by wireless communication.

A portable terminal such as a cellular phone is used indoors and outdoors because it is easy to carry (see Patent Document 1).
By the way, in recent years, some portable terminals have a tethering function by wireless communication. With tethering by wireless communication, a portable terminal having a tethering function is operated as a wireless LAN (Local Area Network) router, that is, an access point (AP), and a terminal such as a personal computer (PC) (hereinafter referred to as “terminal terminal”). .) Is a function to connect to the Internet. When the tethering function is implemented, a terminal such as a PC and a portable terminal are connected by radio, and the portable terminal and the Internet are connected by a telephone line network. Hereinafter, the tethering function by wireless communication is simply referred to as a tethering function.

In order to use the tethering function, the user first presets one frequency band among a plurality of frequency bands that can be used as a frequency band to be used for tethering in the portable terminal. Then, when the user instructs the portable terminal to start the tethering function by a key operation or the like, tethering is executed in a preset frequency band.
As described above, by providing the mobile terminal with the tethering function, the user can use the tethering function indoors and outdoors using the advantage that the mobile terminal can be easily carried.

JP 2003-087361 A

  Currently, there are multiple frequency bands that can be used for tethering. For example, in Japan, the 2.4 GHz band, the 5.2 GHz band, the 5.3 GHz band, and the 5.6 GHz band are frequency bands that can be used for tethering. Of these frequency bands, the 5.2 GHz band is used for communication using the Earth exploration satellite, and the 5.3 GHz band is used for communication using the meteorological satellite. Most users do not know that the 5.2 GHz band or the 5.3 GHz band is used for communication using the earth exploration satellite or the meteorological satellite. Therefore, when the user executes tethering in the 5.2 GHz band or 5.3 GHz band preset as a frequency band to be used for tethering, communication using a satellite such as an earth exploration satellite or a meteorological satellite is performed depending on a place where the tethering is performed. May be affected.

  In view of the above problems, an object of the present invention is to provide a portable terminal and a control method capable of appropriately performing tethering.

In order to achieve the above object, the present invention is a portable terminal that performs communication using a tethering function, and the reception strength of a signal received by the GPS receiver and the GPS receiver is greater than or equal to a predetermined threshold value. A tethering control unit that controls the tethering function, and a control unit, wherein the tethering control unit selects one frequency band among a plurality of frequency bands that can be used in the tethering. Determining whether the specified frequency band corresponds to a predetermined frequency band, determining that the specified frequency band corresponds to the predetermined frequency band, and determining the reception intensity by the determination unit When it is determined that the threshold value is equal to or greater than the threshold, the tethering is suppressed, and the control unit applies the remaining frequency bands excluding the specified frequency band among the plurality of frequency bands. Until said frequency band not corresponding to a predetermined frequency band is identified, and the identification and the determination by the tethering control unit, and controlling so as to repeat the determination by the determination unit.

  According to the said structure, the portable terminal which can implement a tethering appropriately can be provided.

1 is an external view of a mobile terminal (mobile phone) 10. 2 is a block diagram showing a configuration of a mobile terminal 10. FIG. It is a figure which shows an example of the data structure of frequency information table T100. (A) is a figure which shows an example of the selection screen G100 for making a user select either 2 GHz band and 5 GHz band, (b) is any of 5.2 GHz band, 5.3 GHz band, and 5.6 GHz band. It is a figure which shows an example of the selection screen G200 for making a user select. 4 is a flowchart showing processing relating to the tethering function implementation of the mobile terminal 10; It is a flowchart which shows the process which concerns on tethering function implementation in a modification.

1. Embodiment Hereinafter, a mobile terminal 10 according to an embodiment of the present invention will be described.
1.1 Overview The mobile terminal 10 is applied to, for example, a mobile phone, and the external appearance thereof will be described with reference to FIG.

The mobile terminal 10 has a touch panel function, and a liquid crystal display 11, a key operation unit 12, a speaker 13, and a microphone 14 are arranged.
The liquid crystal display 11 displays an image and the like, and accepts a touch input and a character input from the user through a touch panel function.

The key operation unit 12 includes one or more keys arranged on the side surface of the casing, and accepts key input.
The speaker 13 emits sound to the outside.
The microphone 14 acquires sound from the outside.
The mobile terminal 10 has a tethering function, and operates as an access point when the terminal terminal uses the Internet by implementing the tethering function. When the mobile terminal 10 performs the tethering function, the user is allowed to select one frequency band from a plurality of frequency bands that can be used for tethering as a candidate for a frequency band used for tethering. Or you may set the frequency which a terminal uses for tethering automatically so that it may mention later. The mobile terminal 10 performs communication other than wireless communication using the tethering function by performing dithering in the frequency band selected at the current position, and communication using a satellite such as an earth exploration satellite or a meteorological satellite (hereinafter referred to as a “satellite”). , Referred to as “other communication”), the user is allowed to select another frequency band as a candidate frequency band to be used for tethering, and in the case where there is no influence, the selected frequency band is used. Perform tethering. The connection between the portable terminal and the Internet at the time of tethering is performed via a telephone line network.

1.2 Configuration Here, the configuration related to the tethering function in the mobile terminal 10 will be described.
As shown in FIG. 2, the mobile terminal 10 includes a storage unit 100, a GPS (Global Positioning System) reception unit 101, a determination unit 102, a communication unit 103, a reception unit 104, a display unit 105, and a tethering control unit 106. Yes. Further, the tethering control unit 106 includes a frequency band specifying unit 110 and a radio unit 111 as shown in FIG.

In FIG. 2, only the components related to the tethering function are shown in FIG. 2, but other functions such as the key operation unit 12 and the components related to the telephone function are provided as functions of the mobile phone.
The mobile terminal 10 includes a processor and a memory. The functions of the determination unit 102, the reception unit 104, the display unit 105, and the frequency band specifying unit 110 are stored in the memory. It is realized by executing.

Hereinafter, each component will be described.
(1) Storage unit 100
The storage unit 100 stores, for each of a plurality of frequency bands that can be used for tethering, frequency information that indicates whether or not the frequency band corresponds to a frequency band that is used in other communications.

Specifically, the storage unit 100 has a frequency information table T100 shown in FIG.
In the frequency information table T100, for each of a plurality of frequency bands that can be used for tethering (here, 2.4 GHz band, 5.2 GHz band, 5.3 GHz band, 5.6 GHz band, 5.8 GHz band) Frequency information is associated with each country where 10 is used.

  The frequency information is composed of a value of 0 or 1, and when the value indicated by the frequency information is 1, the frequency band corresponding to the frequency information does not correspond to the frequency band used in other communication. When the value indicated by the frequency information is 0, it indicates that the frequency band corresponding to the frequency information corresponds to the frequency band used in other communications. In Japan and Europe, since the frequency band “5.8 GHz band” cannot be used for tethering, frequency information corresponding to this frequency band is not set. However, in the frequency information table T100 of FIG. Is described.

  According to the frequency information table T100, for example, in Japan, frequency bands that can be used for tethering are four frequency bands of 2.4 GHz band, 5.2 GHz band, 5.3 GHz band, and 5.6 GHz band. Since the frequency information corresponding to the frequency band of 2 GHz band and 5.3 GHz band indicates the value “0”, it indicates that these frequency bands correspond to frequency bands used in other communications.

  As shown in the frequency information table T100, in Japan, the frequency bands of the 5.2 GHz band and the 5.3 GHz band in which the value “0” is set in the frequency information are used for communication in the earth exploration satellite and the meteorological satellite, respectively. It has been. Therefore, for example, when tethering is performed by the portable terminal 10 in the frequency band of 5.2 GHz band and 5.3 GHz band outdoors, there is a possibility that the communication performed by these satellites may be affected.

(2) GPS receiver 101
The GPS receiving unit 101 is a receiving circuit that receives a signal transmitted from an artificial satellite (hereinafter referred to as a GPS satellite) used in GPS.
(3) Discriminating unit 102
The determination unit 102 determines whether or not the reception intensity of the signal received by the GPS receiving unit 101 is equal to or greater than a predetermined threshold in order to check whether or not the own device is present at a position that affects other communication. It is a thing which discriminates.

  Specifically, the determination unit 102 calculates the reception intensity of a signal received from one GPS satellite among a plurality of GPS satellites with which communication was performed in order to identify the position of the mobile terminal 10. Hereinafter, calculation of reception strength will be described. The discriminating unit 102 calculates the carrier-to-noise ratio (C / N) of the received signal and sets the value as the reception intensity. The carrier-to-noise ratio represents the ratio of the received power of Carrier (carrier: signal) and the received power of Noise (noise: noise). For the calculation of the value “C / N”, a low noise amplifier (LNA) included in a GPS signal receiving circuit (here, the GPS receiving unit 101) is used. LNA amplifies a GPS signal received from a GPS satellite. The value “C” represents the received power when the LNA is activated, that is, when a GPS signal is received and amplified. Further, the value “N” represents the reception power of only noise when the LNA is not activated, that is, the GPS signal is not received.

The determination unit 102 determines whether or not the calculated value “C / N” is equal to or greater than a predetermined threshold (for example, 30 dB). The determination unit 102 notifies the tethering control unit 106 of the determination result.
(4) Communication unit 103
The communication unit 103 transmits / receives an area signal, a signal related to a call, and the like with the base station. The area signal transmitted from the base station includes a country code for identifying a country in which a call using a communication system including the base station can be used. The mobile terminal 10 can specify the country in which the mobile device 10 is currently located based on the country code included in the received area signal. Or you may set the country where a user is present from a terminal.

The communication unit 103 acquires the country code included in the received area signal, and outputs the acquired country code to the frequency band specifying unit 110 of the tethering control unit 106.
The communication unit 103 transmits and receives data to and from an external device via the Internet when tethering is performed. Specifically, the communication unit 103 outputs data received from the external device to the tethering control unit 106. The communication unit 103 transmits the data received from the tethering control unit 106 to an external device via the Internet.

(5) Reception unit 104
The receiving unit 104 receives an instruction by touch input or character input from the liquid crystal display 11 and an instruction by key input from the key operation unit 12 by a touch panel function.
Specifically, the accepting unit 104 accepts selection of a frequency band used for tethering from the liquid crystal display 11 by the touch panel function, and outputs the selected frequency band to the tethering control unit 106.

(6) Display unit 105
The display unit 105 includes the liquid crystal display 11 shown in FIG. 1, a touch panel function (not shown), and the like, and displays various screens.
Hereinafter, various screens displayed on the display unit 105 and used for selecting a frequency band used for tethering will be described.

As shown in FIG. 3, the frequency band used for tethering is roughly divided into a frequency band of 2 GHz band and a frequency band of 5 GHz band. Furthermore, there are a 5.2 GHz band, a 5.3 GHz band, and a 5.6 GHz band as frequency bands of 5 GHz band used for tethering.
FIG. 4A shows a selection screen G100 for allowing the user to select either the 2 GHz band frequency band or the 5 GHz band frequency band for the frequency band to be used for tethering. The selection screen G100 includes a check button G101 for selecting a frequency band of 2 GHz band, a check button G102 for selecting a frequency band of 5 GHz band, and an OK button G105 for accepting selection. For example, when the accepting unit 104 accepts a check of either the check button G101 or the check button G102 and then accepts a press of the OK button G105, the frequency corresponding to the check button of any of the check buttons G101 and G102. A band is specified, and a first selection instruction indicating that the specified frequency band has been selected is output to the tethering control unit 106.

  FIG. 4B shows the detailed frequency bands (5.2 GHz band, 5.3 GHz band, and 5.6 GHz band) that are desired to be used for tethering when the frequency band of 5 GHz band is selected on the selection screen G100. ) Shows a selection screen G200 for allowing the user to select. On the selection screen G200, a check button G201 for selecting a frequency band of 5.2 GHz band, a check button G202 for selecting a frequency band of 5.3 GHz band, and a frequency band of 5.6 GHz band are selected. A check button G203 and an OK button G205 for accepting selection confirmation are included. For example, when the accepting unit 104 accepts any check of the check button G201, the check button G202, and the check button G203, and then accepts pressing of the OK button G205, any of the check buttons G201, G202, and G203 is checked. The frequency band corresponding to the selected button is specified, and a second selection instruction indicating that the specified frequency band has been selected is output to the tethering control unit 106.

(7) Tethering control unit 106
As described above, the tethering control unit 106 includes the frequency band specifying unit 110 and the radio unit 111. The tethering control unit 106 determines whether or not tethering is possible in the frequency band selected by the user, and selects tethering. Tethering is performed in the specified frequency band.
Hereinafter, the frequency band specifying unit 110 and the radio unit 111 will be described.

(7-1) Frequency band specifying unit 110
The frequency band specifying unit 110 determines whether the frequency band selected by the user affects other communications based on the country indicated by the country code and the strength of the signal received by the GPS receiving unit 101. It is.
Hereinafter, specific functions will be described using a case where the mobile terminal 10 is used in Japan as an example.

The frequency band specifying unit 110 receives the country code output from the communication unit 103.
When receiving the first selection instruction from the reception unit 104, the frequency band specifying unit 110 further receives a second selection instruction from the reception unit 104 when the received first selection instruction indicates a 5 GHz band.
The frequency band specifying unit 110 uses the country code received from the communication unit 103 and the frequency information in the frequency band of the 5 GHz band corresponding to the country indicated by the country code using the frequency information table T100 stored in the storage unit 100. One or more frequency bands whose values are “0” (here, the 5.2 GHz band and the 5.3 GHz band, which are hereinafter referred to as “specific frequency bands”) are specified.

When the received first selection instruction indicates the 5 GHz band, the frequency band specifying unit 110 further sets the frequency band indicated by the received second selection instruction (that is, the frequency band selected by the user) to the specific frequency band (5.2 GHz band). Or 5.3 GHz band) is determined.
When it is determined that the frequency band indicated by the second selection instruction matches any one of the specific frequency bands (5.2 GHz band, 5.3 GHz band), the frequency band specifying unit 110 uses the determining unit 102 to determine the frequency band. A determination result is received, and based on the received determination result, it is determined whether or not tethering in the selected frequency band affects other communications. When determining that the tethering implementation in the selected frequency band affects other communications, the frequency band specifying unit 110 suppresses the tethering implementation in the selected frequency band, and selects and tethers the user again. The display unit 105 is controlled to display the selection screen G100 in order to select another frequency band to be used. When determining that there is no influence, the frequency band specifying unit 110 instructs the radio unit 111 to perform tethering in the selected frequency band.

In addition, the received first selection instruction indicates the 2 GHz band, and the frequency band indicated by the second selection instruction does not match any of the specific frequency bands (5.2 GHz band, 5.3 GHz band). In this case, the frequency band specifying unit 110 outputs an instruction to the radio unit 111 to perform tethering in the selected frequency band.
(7-2) Radio unit 111
The wireless unit 111 is a wireless circuit that performs tethering in a frequency band instructed to perform tethering from the frequency band specifying unit 110, that is, performs wireless communication with a terminal terminal.

The wireless unit 111 receives data from the terminal terminal through wireless communication in the frequency band instructed to perform tethering, and outputs the received data to the communication unit 103.
The wireless unit 111 transmits the data received from the communication unit 103 to the terminal terminal through wireless communication in the frequency band instructed to perform tethering.
2. Operation Here, the operation when the mobile terminal 10 performs tethering will be described with reference to the flowchart shown in FIG.

The receiving unit 104 receives a tethering execution instruction from the user (step S5).
The communication unit 103 acquires a country code included in the area signal (step S10).
The accepting unit 104 accepts selection of a frequency band desired when the user performs tethering from a touch operation on the selection screen G100 displayed on the display unit 105 (step S15).

The frequency band specifying unit 110 determines whether or not the frequency band selected by the user is a frequency band of 5 GHz (step S20).
When the frequency band specifying unit 110 determines that the frequency band selected by the user is a frequency band of 5 GHz (“Yes” in step S20), the receiving unit 104 further selects the selection displayed on the display unit 105. From the touch operation on the screen G200, the user receives selection of a frequency band desired when tethering is performed among a plurality of frequency bands of 5 GHz band (step S25).

  The frequency band specifying unit 110 uses the frequency information table T100 to determine whether or not the frequency band received in step S25 corresponds to the frequency band used in other communications in the country indicated by the country code acquired in step S10. Judgment is made (step S30). Specifically, the frequency band specifying unit 110 uses the country code and frequency information table T100 to indicate that the value indicated by the frequency information is “0” in the frequency band of the 5 GHz band corresponding to the country indicated by the country code. Identify one or more specific frequency bands. Then, the frequency band specifying unit 110 determines whether or not the frequency band received in step S25 matches any of the specific frequency bands.

  When it is determined that the frequency band received in step S25 matches any of the specific frequency bands in frequency band specifying unit 110 (“Yes” in step S30), discrimination unit 102 receives the signal received by GPS receiving unit 101. A value “C / N” indicating the intensity is calculated (step S35). The determination unit 102 determines whether or not the calculated value “C / N” is greater than or equal to a threshold value (for example, 30 dB) (step S40).

When the determination unit 102 determines that the value “C / N” is equal to or greater than the threshold (“Yes” in step S40), the frequency band specifying unit 110 performs tethering in the frequency band selected in step S25. Is canceled (step S45), and the process returns to step S15.
When it is determined that the frequency band selected in step S15 is a frequency band of 2 GHz band ("No" in step S20), the frequency band selected in step S25 corresponds to the frequency band used in other communication If it is determined that the frequency band received in step S25 does not match any of the specific frequency bands (“No” in step S30), the wireless unit 111 tethers in the selected frequency band. (Step S50).

When the determination unit 102 determines that the value “C / N” is not equal to or greater than the threshold value (“No” in step S40), the frequency band specifying unit 110 executes step S50 described above.
3. Modifications As described above, the description has been given based on the embodiment, but the present invention is not limited to the above-described embodiment. For example, the following modifications can be considered.

(1) Although the frequency band used for tethering is selected by the user in the above embodiment, the present invention is not limited to this.
The frequency band specifying unit 110 may automatically select a frequency band used for tethering.
The operation in this case will be described with reference to the flowchart shown in FIG.
The receiving unit 104 receives a tethering execution instruction from the user (step S100).

The communication unit 103 acquires a country code included in the area signal (step S105).
The frequency band specifying unit 110 searches for a channel (empty channel) that does not interfere with the surroundings from a plurality of frequency bands (here, 2.4 GHz band, 5.2 GHz band, 5.3 GHz band, 5.6 GHz band). Two free channels are acquired (step S110). For example, the frequency band specifying unit 110 receives, for each channel, a signal in a frequency band belonging to the channel, and if the received intensity of the received signal is a predetermined value or less, the channel to which the frequency band belongs is not available. Identify the channel.

The frequency band specifying unit 110 determines whether or not the acquired frequency band is a frequency band of 5 GHz band (step S115).
When it is determined that the acquired frequency band is a frequency band of 5 GHz band (“Yes” in step S115), the frequency band specifying unit 110 acquires in step S110 in the country indicated by the country code acquired in step S105. It is determined using the frequency information table T100 whether or not the frequency band of the vacant channel corresponds to the frequency band used in other communications (step S120).

  When it is determined that the frequency band of the vacant channel acquired by the frequency band specifying unit 110 corresponds to the frequency band used for other communication (“Yes” in step S120), the determination unit 102 has received the GPS reception unit 101. A value “C / N” indicating the reception strength of the signal is calculated (step S125). The determination unit 102 determines whether or not the calculated value “C / N” is greater than or equal to a threshold value (for example, 30 dB) (step S130).

When the determination unit 102 determines that the value “C / N” is equal to or greater than the threshold (“Yes” in step S130), the frequency band specifying unit 110 performs tethering in the frequency band acquired in step S110. The process is canceled (step S135), and the process returns to step S110.
If it is determined that the frequency band acquired in step S110 is a frequency band of 2 GHz band ("No" in step S115), and if the frequency band acquired in step S110 does not correspond to the frequency band used in other communications If it is determined (“No” in step S120), the frequency band specifying unit 110 performs tethering in the selected frequency band (step S140).

  Note that when the processing returns from step S135 to step S110 and the free channel is acquired again, the frequency band specifying unit 110 acquires a channel other than the free channel acquired so far. For example, all the empty channels (channels in the frequency band corresponding to the frequency band used in other communication) acquired until the frequency band not corresponding to the frequency band used in other communication is acquired temporarily An empty channel is searched from the remaining channels except for all the channels stored in the storage area.

  In step S115, it is determined whether or not the acquired frequency band is a 5 GHz band. In step S115, the acquired frequency band is 2.4 GHz band, 5.2 GHz band, 5.3 GHz band, and 5. It may be determined which of the 6 GHz band. In this case, if it is determined that the acquired frequency band is any of the 5.2 GHz band and the 5.3 GHz band, the process executes step S125, and the acquired frequency band is 2.4 GHz band, 5.6 GHz band. If it is determined that any one of the above, the process executes step S140.

Further, the search for an empty channel may be performed in the order of 5.6 GHz band, 5.3 GHz band, 5.2 GHz band, and 2.4 GHz band. By performing the search in this order, it is possible to preferentially search and use a frequency band of 5 GHz band that can perform communication at a higher speed than communication in the 2.4 GHz band.
(2) In the above embodiment, when the user selects the frequency band used for tethering, the selection screens G100 and G200 are used. However, the present invention is not limited to this.

For example, one of the 2.4 GHz band, the 5.2 GHz band, the 5.3 GHz band, and the 5.6 GHz band may be selected on one screen.
In this case, in step S20 shown in FIG. 5, it is determined whether the selected frequency band is the 2.4 GHz band, the 5.2 GHz band, the 5.3 GHz band, or the 5.6 GHz band, that is, the selected frequency band. Is determined to correspond to a frequency band used in other communications. If it is determined that the selected frequency band is any of the 5.2 GHz band and the 5.3 GHz band, the process executes step S35. If it is determined that the selected frequency band is any of the 2.4 GHz band and the 5.6 GHz band, the process executes step S50.

(3) In the above embodiment, whether or not any of the 5.2 GHz band and the 5.3 GHz band is used for the tethering is determined at the start of the tethering. However, the present invention is not limited to this.
During tethering, the discriminating unit 102 periodically checks the reception strength of the signal received by the GPS receiving unit 101, and the frequency band specifying unit 110 uses the frequency used in tethering based on the check result of the discriminating unit 102. It may be determined whether or not the band can be used.

  In this case, when the frequency band specifying unit 110 determines that the frequency band being used in tethering is not usable, the frequency band specifying unit 110 shifts from the currently used frequency band to a frequency band that does not correspond to the frequency band used in other communication. And tethering may be stopped. Alternatively, the user may be prompted to change the frequency band used for tethering by displaying a message that affects other communications.

(4) In the above embodiment, the mobile terminal 10 performs the determination by the determination unit 102 after the frequency band to be used for tethering is selected. However, the present invention is not limited to this.
After receiving an instruction to perform tethering by the receiving unit 104, the mobile terminal 10 determines whether or not the reception intensity of the signal from the GPS satellite is equal to or higher than a threshold value by the determining unit 102, and then uses the frequency for tethering to the user A belt may be selected.

  In this case, when the determination unit 102 determines that the reception intensity of the signal from the GPS satellite is equal to or higher than the threshold, the mobile terminal 10 uses either the 2.4 GHz band or the 5.6 GHz band as the frequency band used for tethering. A screen for selecting is displayed on the display unit 105. And the reception part 106 receives one frequency band utilized for tethering from the frequency band of 2.4 GHz band and 5.6 GHz band by a touch panel function from a user. In addition, when the determination unit 102 determines that the reception intensity of the signal from the GPS satellite is not equal to or higher than the threshold, the mobile terminal 10 uses the 2.4 GHz band, the 5.2 GHz band, the 5.3 GHz band as the frequency band used for tethering. A screen for selecting either the band or the 5.6 GHz band is displayed on the display unit 105. And the reception part 106 receives one frequency band utilized for tethering from these four frequency bands from a user with a touch-panel function.

  Alternatively, after the determination by the determination unit 102, the mobile terminal 10 may search for a free channel in a frequency band used for tethering. Specifically, after receiving an instruction to perform tethering by the reception unit 104, the mobile terminal 10 determines whether the reception strength of the signal from the GPS satellite is equal to or higher than a threshold value by the determination unit 102, and the reception strength is When it is determined that the value is equal to or greater than the threshold value, an empty channel is searched from the 2.4 GHz band and the 5.6 GHz band.

(5) In the above embodiment, the determination unit 102 calculates the reception intensity of a signal received from one GPS satellite among a plurality of GPS satellites with which communication was performed in order to identify the position of the mobile terminal 10. It is not limited to this.
The reception intensity may be calculated using signals received from a plurality of GPS satellites.
For example, the determination unit 102 calculates a C / N value from each of signals from a plurality of GPS satellites, and may use an average value of the calculated values “C / N” as a reception intensity value. The maximum value among the values “C / N” may be set as the reception intensity value.

In addition, as an example of calculation of the reception intensity of the signal from the GPS satellite, the calculation method using the reception power when the LNA is activated and the reception power when the LNA is not activated has been described, but other calculation methods are used. May be.
(6) In the above embodiment, the mobile terminal 10 is a mobile phone as an example. However, the present invention is not limited to this.

The mobile terminal of the present invention may be any device that can access a server device on the Internet through a telephone line network, such as a PDA (Personal Digital Assistant), PHS (Personal Handy-phone System), etc., in addition to a mobile phone. .
(7) In the above embodiment, the frequency information is set to a value of “0” or “1”, but is not limited to this.

If the frequency information is information such as a value that can identify whether or not the frequency band corresponding to the frequency information corresponds to a frequency band used in other communication, “0”, “ Information such as a value other than 1 ″ may be set.
(8) In the above embodiment, when the mobile terminal 10 determines that the reception strength of the signal from GPS hygiene is equal to or higher than the threshold value by the determination unit 102, the frequency band used for other communication is determined. When applicable to the band, the implementation of tethering in the selected frequency band is suppressed, but the present invention is not limited to this.

When the determination unit 102 determines that the reception intensity of the signal from GPS hygiene is equal to or greater than the threshold, the portable terminal 10 corresponds to the frequency band used for other communication, regardless of whether it is not applicable. Alternatively, implementation of tethering in the selected frequency band may be suppressed.
(9) A program describing the procedure of the method described in the above embodiments and modifications is stored in a memory, and a CPU (Central Processing Unit) or the like reads the program from the memory and executes the read program Thus, the above method may be realized.

Further, a program describing the procedure of the method may be stored in a recording medium and distributed. As a medium for storing the program, for example, an external memory such as a flash memory, a USB memory, or an SD card (registered trademark) can be cited as an example.
(10) The above embodiments and modifications may be combined.

1.5 Supplement (1) A portable terminal that performs communication using a tethering function, which is an aspect of the present invention, has a GPS receiving unit and a reception intensity of a signal received by the GPS receiving unit equal to or higher than a predetermined threshold. And a tethering control unit that inhibits execution of the tethering when the determination unit determines that the reception intensity is equal to or greater than the threshold value.

  According to this configuration, the mobile terminal can appropriately perform tethering. If the mobile terminal determines that the signal reception intensity by the GPS receiver is greater than or equal to the threshold, there is no obstacle above the mobile terminal, that is, between the satellite and another satellite other than the GPS satellite. In such a situation, if tethering is performed in a frequency band corresponding to the frequency band used for other communications using other satellites, other communications may be affected. There is sex. If the mobile terminal determines that the signal reception intensity by the GPS receiver is equal to or greater than the threshold, the tethering can be prevented from affecting other communications by suppressing the tethering.

(2) Here, the tethering control unit identifies one frequency band among a plurality of frequency bands available for the tethering, and determines whether the identified frequency band corresponds to a predetermined frequency band. If it is determined and it is determined that the specified frequency band does not correspond to the predetermined frequency band, tethering may be performed in the specified frequency band.
According to this configuration, the mobile terminal determines whether or not the mobile terminal can be used for tethering based on whether or not one specified frequency band among a plurality of frequency bands that can be used for tethering corresponds to a predetermined frequency band. can do.

(3) Here, the tethering control unit may perform the specification by receiving one frequency band selected by the user from among the plurality of frequency bands.
According to this configuration, the mobile terminal specifies the frequency band to be used for tethering by the user's selection, so that the user can use tethering in the frequency band desired by the user.

  (4) Here, when the determination unit determines that the reception intensity is equal to or higher than the threshold, the portable terminal further includes the remaining frequencies excluding the specified frequency band among the plurality of frequency bands. A control unit that controls to repeat the specification and determination by the tethering control unit and the determination by the determination unit until a frequency band that does not correspond to the predetermined frequency band is specified for the band Good.

According to this configuration, when the reception intensity of the signal received by the GPS receiver is greater than or equal to the threshold value, the portable terminal selects one frequency band by the tethering control unit and the selected one frequency band is a predetermined frequency band. The determination of whether or not a frequency band is applicable can be repeated until a frequency band that does not correspond to a predetermined frequency band is selected.
(5) Here, when the determination unit determines that the reception intensity is equal to or higher than the threshold, the tethering control unit selects a frequency band corresponding to the predetermined frequency band among the plurality of frequency bands. One frequency band may be specified from the remaining frequency bands, and tethering may be performed in the specified one frequency band.

  According to this configuration, the portable terminal can be used for tethering when the reception intensity of a signal received by the GPS receiver is equal to or higher than a threshold, and is one frequency from a frequency band that does not correspond to a predetermined frequency band. The belt can be specified.

  The present invention is effective for a portable terminal that performs tethering in one frequency band among a plurality of frequency bands that can be tethered.

DESCRIPTION OF SYMBOLS 10 Mobile terminal 11 Liquid crystal display 12 Key operation part 13 Speaker 14 Microphone 100 Memory | storage part 101 GPS receiving part 102 Discriminating part 103 Communication part 104 Reception part 105 Display part 106 Tethering control part 110 Frequency band specific part 111 Radio | wireless part

Claims (6)

A mobile terminal that performs communication using a tethering function,
A GPS receiver;
A determination unit for determining whether the reception intensity of a signal received by the GPS reception unit is equal to or greater than a predetermined threshold;
A tethering control unit for controlling the tethering function ;
A control unit,
The tethering control unit identifies one frequency band among a plurality of frequency bands that can be used in the tethering, determines whether or not the identified frequency band corresponds to a predetermined frequency band, and the identified frequency band If it is determined that a band corresponds to the predetermined frequency band, and the determination unit determines that the reception strength is equal to or higher than the threshold, the tethering is suppressed.
The control unit performs the tethering control unit until the frequency band that does not correspond to the predetermined frequency band is specified for the remaining frequency bands excluding the specified frequency band among the plurality of frequency bands. Control is performed so as to repeat the identification, the determination, and the determination by the determination unit . The tethering control unit, if the previous SL specified frequency band is determined not to correspond to the predetermined frequency band, to claim 1, which comprises carrying out the tethering the specified frequency band The portable terminal described. The tethering control unit performs tethering in the specified frequency band when the determination unit determines that the reception intensity is not equal to or greater than the threshold value.
The mobile terminal according to claim 1, wherein the mobile terminal is a mobile terminal. The tethering control unit
The mobile terminal according to any one of claims 1 to 3 , wherein the identification is performed by receiving one frequency band selected by a user from the plurality of frequency bands. A control method used in a portable terminal that performs communication using a tethering function,
A GPS receiving step for receiving a signal from a GPS satellite;
A determination step of determining whether or not the reception intensity of the signal received in the GPS reception step is greater than or equal to a predetermined threshold;
A tethering control step for controlling the tethering function ;
Control steps,
The tethering step specifies one frequency band among a plurality of frequency bands available for the tethering, determines whether the specified frequency band corresponds to a predetermined frequency band, and determines the specified frequency band. Is determined to fall within the predetermined frequency band, and the determination step determines that the received strength is greater than or equal to the threshold value, the tethering is suppressed,
The control step includes the tethering control step until the frequency band not corresponding to the predetermined frequency band is specified for the remaining frequency bands excluding the specified frequency band among the plurality of frequency bands. A control method characterized by performing control so as to repeat the determination, the determination, and the determination in the determination step . A computer program for control used in a portable terminal that performs communication by a tethering function,
On the computer,
A GPS receiving step for receiving a signal from a GPS satellite;
A determination step of determining whether or not the reception intensity of the signal received in the GPS reception step is greater than or equal to a predetermined threshold;
A tethering control step for controlling the tethering function;
Control steps and
The tethering step specifies one frequency band among a plurality of frequency bands available for the tethering, determines whether the specified frequency band corresponds to a predetermined frequency band, and determines the specified frequency band. Is determined to fall within the predetermined frequency band, and the determination step determines that the received strength is greater than or equal to the threshold value, the tethering is suppressed,
The control step includes the tethering control step until the frequency band not corresponding to the predetermined frequency band is specified for the remaining frequency bands excluding the specified frequency band among the plurality of frequency bands. Control to repeat the identification and the determination and the determination in the determination step
A computer program characterized by the above.

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