JP2008113244A - Correcting device and correcting method for temperature dependence control object of portable communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a correcting device and correction method for a temperature dependence control object of a portable communication terminal, which can correct a temperature dependence control object without installing a new additional device to the portable communication terminal. <P>SOLUTION: The correcting device is provided with: an area determining means 11-1 for determining an area at which the portable communication terminal 1 is located; a temperature determining means 11-2 for determining an ambient temperature of the portable communication terminal 1 according to temperature information of each area and the area where the portable communication terminal 1 is located; an internal temperature predicting means 11-3 for predicting internal temperature of the portable communication terminal 1 by adding a correction value corresponding to an operating state of the portable communication terminal to the ambient temperature determined by the temperature determining means 11-2 so as to operate the internal temperature of the portable communication terminal 1; and a correcting means 11-4 for correcting the temperature dependence object on the basis of the internal temperature of the portable communication terminal 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a correction apparatus and a correction method for a temperature-dependent control target of a portable communication terminal, such as increase / decrease of transmission output, in radio communication between a radio base station and a portable communication terminal.

  Conventionally, in wireless communication between a wireless base station and a portable communication terminal (such as a mobile phone or a PHS terminal), at least one of them detects a reception level and increases or decreases a transmission output according to the value of the reception level The transmission output is largely controlled when the reception level is low, and the transmission output is controlled to be low when the reception level is high.

Since the radio wave condition between the radio base station and the portable communication terminal changes depending on weather conditions such as temperature and rainfall, it is necessary to increase / decrease the transmission output according to the weather conditions. For example, what is optimally controlled using a rain sensor and a GPS antenna so as to increase the transmission output of either a radio base station or a portable communication terminal according to the amount of rain attenuation only during rain It is described in Document 1.
JP 10-65596 A

  However, when implementing the transmission output control method in the conventional wireless base station or portable communication terminal, it is necessary to install a rain sensor and a GPS antenna. Therefore, the weight increase and cost of the wireless base station or portable communication terminal are required. There was an inconvenience that up was inevitable. In particular, since a portable communication terminal such as a portable communication terminal is carried by a general user when going out, it is desired to avoid an increase in size, weight, and cost as much as possible.

  In addition, for example, a method of controlling the transmission output according to the temperature by incorporating a temperature sensor device inside the portable communication terminal is conceivable. An increase in the weight and size of the terminal and the accompanying cost increase are inevitable. In particular, in portable communication terminals such as mobile phones and PHS terminals, it is difficult to install a temperature sensor device, circuit, or the like, because the miniaturization, weight reduction, and thickness reduction of the housing are a major issue.

  The present invention has been made in view of the above circumstances, and corrects a temperature-dependent control target without installing an additional device such as a rainfall sensor, a GPS antenna, or a temperature sensor for a portable communication terminal. An object of the present invention is to obtain a correction device and a correction method for a temperature-dependent control target of a portable communication terminal capable of performing the above.

In order to achieve the above object, a correction device for a temperature-dependent control target of a portable communication terminal according to the present invention includes area determining means for determining an area where a portable communication terminal is located, temperature information for each area, and the portable information terminal. Temperature determining means for determining the temperature around the portable communication terminal according to the area where the communication terminal is located; and the temperature around the portable communication terminal determined by the temperature determining means, the portable communication terminal An internal temperature predicting means for predicting the internal temperature of the portable communication terminal by calculating the internal temperature of the portable communication terminal by adding a correction value according to the operation state of the portable communication terminal, and the internal temperature of the portable communication terminal And a correction means for correcting the temperature-dependent object based on (Claim 1).
With this configuration, the internal temperature of the portable communication terminal is predicted by adding or subtracting a correction value according to the operation state of the portable communication terminal to the temperature of the area where the portable communication terminal is currently located obtained from weather information. Then, by correcting the temperature-dependent control target based on the predicted temperature, the temperature-dependent control target can be corrected without installing an additional device.

Further, the correction value is a value obtained by using a correction table prepared by predicting a temperature rise in each operation state of the portable communication terminal in advance (Claim 2).
Thereby, the correction | amendment with respect to a temperature dependence control object can be performed according to each operation state of a portable communication terminal.

Furthermore, the operating state of the portable communication terminal includes at least a standby state, a telephone conversation, a browsing state, and a charging state (Claim 3).
As a result, the temperature-dependent control target can be corrected in accordance with each of the operating states of standby, talking, browsing, and charging, which are the main operating states of the portable communication terminal.

The correction means adds or subtracts a voltage correction value having temperature characteristics.
Thereby, it is possible to perform correction for the temperature-dependent control target by adding and subtracting voltage correction values having temperature characteristics.

Furthermore, the temperature-dependent control target is voltage correction for displaying the remaining battery level (Claim 5).
Thereby, it is possible to correct a problem of the battery remaining amount display that the display is made more or less than the actual remaining amount due to the temperature change.

The temperature-dependent control target is voltage correction of a power amplifier for wireless transmission (claim 6).
Thereby, stable transmission / reception can be performed with the radio base station even if the internal temperature of the warm portable communication terminal changes.

The correction method for the temperature-dependent control target of the portable communication terminal according to the present invention includes an area determining step for determining an area where the portable communication terminal is located, temperature information for each area, and the position of the portable communication terminal. A temperature determining step for determining an ambient temperature of the portable communication terminal according to an area to be operated, and an ambient temperature of the portable communication terminal determined by the temperature determining means according to an operating state of the portable communication terminal A portable communication terminal temperature prediction step for predicting the temperature inside the portable communication terminal by adding the correction value and calculating the internal temperature of the portable communication terminal, and based on the internal temperature of the portable communication terminal And a correction step of correcting the temperature-dependent object (claim 7).
By this method, the internal temperature of the portable communication terminal is predicted by adding / subtracting a correction value corresponding to the operation state of the portable communication terminal to / from the temperature of the area where the portable communication terminal is currently located obtained from weather information. Then, by correcting the temperature-dependent control target based on the predicted temperature, the temperature-dependent control target can be corrected without installing an additional device.

  According to the present invention, it is possible to perform correction on the temperature-dependent control target without installing a new additional device such as a temperature sensor for the portable communication terminal. While avoiding the increase in weight and size and the accompanying cost increase, it is possible to perform voltage correction for displaying the battery remaining amount, voltage correction of the power amplifier for wireless transmission, and the like, which are targets for temperature dependence control.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a functional block diagram of a portable communication terminal including a correction device for a temperature-dependent control target.

  As shown in FIG. 1, the portable communication terminal 1 includes a control unit 11 that controls the entire apparatus. The control unit 11 is connected to a display unit 13, a memory unit 14, a microphone / speaker 15, a communication unit (transmission / reception unit) 16, an operation unit 17, and a power supply unit 18 mainly including a battery.

  The control unit 11 obtains temperature data (described later), terminal state acquisition, determination of the internal temperature by referring to the table A, determination of the correction voltage value from the internal temperature by referring to the table B, and confirmation voltage value for battery remaining amount display. Calculation, calculation of output voltage value of power amplifier with respect to output adjustment value, etc.

  The operation unit 17 is provided with various keys such as a dial key (numeric key), a power key, a call key, a hold key, and a direction instruction key.

  The display unit 13 is a display such as a liquid crystal display or an organic EL display that displays a telephone number, a communication history, a mail text, an image, a remaining battery level, and the like.

  The memory unit 14 includes the base station ID, reception level, weather information transmitted from the server, terminal status such as standby, talking, browsing, charging, and the tables shown in FIGS. 4 and 7 described later. A, B, etc. are stored.

The microphone / speaker 15 is a part used for a telephone call or the like of the portable communication terminal 1.
The communication unit 16 is used for wireless communication performed by a portable communication terminal with a wireless base station, and includes a wireless transmission power amplifier 16-1.

FIG. 2 is an explanatory diagram showing the function of the correction device for the temperature-dependent control object according to the embodiment of the present invention.
The correction apparatus for the temperature-dependent control object according to the embodiment of the present invention is used when the portable communication terminal 1 shown in FIG. 1 transmits / receives to / from a radio base station.

The area determining unit 11-1 determines which one of the portable communication terminals 1 is based on the identification information (CSID) 25 for identifying the radio base station from the received signal of the portable communication terminal 1 and the reception level 26 of the received signal. Decide if it is located in the area.
The location information for specifying the area is obtained by registering the location of the mobile communication terminal 1 with respect to the communication network.

The temperature determining means 11-2 includes temperature information 27 for each area (area) obtained from information provided to a portable communication terminal from a weather information providing server on the network via an exchange or the like, and the portable communication described above. Based on the area information of the terminal 1, it functions to determine the temperature around the portable communication terminal 1 by software control.
Note that a temperature correspondence table for each season (each month) for each area (region) preset in the portable communication terminal 1 may be used (the user himself / herself may set the temperature correspondence table).

  The internal temperature predicting unit 11-3 adds a correction value corresponding to the operating state of the portable communication terminal 1 to the ambient temperature of the portable communication terminal 1 determined by the temperature determining unit 11-2, and It functions to calculate the internal temperature of the terminal 1. The correction value corresponding to the operating state of the portable communication terminal 1 can be obtained from the table A shown in FIG.

  This table A is a correction table created in advance based on values obtained by measuring a temperature rise by experiments in each operation state of the portable communication terminal 1.

That is, in the table A of FIG. 4, when the state of the portable communication terminal is four states of “standby”, “busy”, “browsing”, and “charging”, the temperature is the predicted temperature. Whereas
-+ 0 ° C when in standby
• + 5 ° C when in a “calling” state
-+ 10 ° C for “browsing” status
-+ 15 ° C when charging
By adding these temperatures, the temperature inside the portable communication terminal can be determined.

  Note that the state of the portable communication terminal is not limited to the above four states, and if the value of the temperature increase by the experiment in the use state other than the above is measured, the table A is further expanded based on that value. Can do.

  The battery remaining amount display / wireless adjustment value correcting unit 11-4, which is a correcting unit for the temperature-dependent control target, corrects the voltage for displaying the battery remaining amount having temperature characteristics at the determined temperature inside the portable communication terminal. By adding and subtracting the value and the voltage correction value of the power amplifier 16-1 for wireless transmission, each of the temperatures functions to obtain the optimum determined battery voltage and power amplifier output value.

  Here, the voltage correction value for displaying the battery remaining amount is as described in Table B shown in FIG. 7. When the temperature inside the terminal is 0 ° C. or lower, 100 mV, and when the terminal internal temperature is 0 ° C. or higher and 30 ° C. or lower, 50 mV, 30 ° C. or higher. It is −50 mV at 50 ° C. or lower, and −100 mV at 50 ° C. or higher. By adding such correction, it is possible to display an accurate remaining battery level.

  Moreover, the voltage correction value of the power amplifier 16-1 for radio transmission is −500 mV when the temperature inside the terminal is 0 ° C. or lower, −250 mV when 30 ° C., 250 mV when 30 ° C. or higher and 50 ° C. or lower, and 600 mV when 50 ° C. or higher. . By applying such correction, wireless communication with stable transmission output can be performed without being affected by temperature.

  Note that the voltage correction value for displaying the remaining battery level and the voltage correction value for the power amplifier 16-1 for wireless transmission are not limited to the above values, but are optimal values for the type and model of the portable communication terminal. It is possible to set.

Next, the operation of the correction apparatus for the temperature-dependent control object according to the present embodiment will be described in detail with reference to the flowcharts shown in FIGS.
First, with reference to FIG. 3, the operation until acquisition of the internal temperature of the portable communication terminal will be described.

  A signal having a predetermined frequency is transmitted and received between the radio base station and the portable communication terminal. At this time, as described above, the voltage value for displaying the remaining battery level, the output voltage of the wireless transmission power amplifier 16-1, or the like varies under the influence of the outside air temperature or the temperature inside the terminal.

  When the portable communication terminal 1 is in the transmission / reception operation mode, the identification information for identifying the radio base station (CS) received by the communication unit 16 through the antenna is determined by the area determination unit 11-1 under the control of the control unit 11. The area where the portable communication terminal 1 is located is determined based on the CSID) and the reception level of the received signal.

  Moreover, the temperature determination means 11-2 predicts and calculates the temperature of the area where the portable communication terminal 1 is located from the area information and the temperature information for each area (area), and the (current) The ambient temperature of the position is acquired (step S1). The temperature value is temporarily stored in the memory unit 14.

  On the other hand, the internal temperature prediction means 11-3 checks the current operation state of the portable communication terminal 1. That is, it is checked whether the state is “standby”, “call”, “browsing”, or “charging” shown in Table A, and the operating state of the terminal is acquired (step S2).

  Since the portable communication terminal 1 uses different power depending on the operation state of the terminal and the amount of heat generated thereby changes, the rate of temperature change inside the terminal can be predicted based on each operation state. Therefore, if the ambient temperature around the portable communication terminal 1 is known, the internal temperature of the portable communication terminal 1 can be known from the rate of temperature change inside the terminal due to each of the above operating states.

  That is, the acquired operating state is corrected by adding the correction value for each operating state shown in Table A to the air temperature acquired in step S1, and the internal temperature of the portable communication terminal 1 is determined (step) S3).

  Thus, the internal temperature C of the portable communication terminal 1 is acquired (step S4) and temporarily stored in the memory 24.

Next, the operation until the determination of the voltage value of the battery remaining amount display, which is an example of the temperature-dependent control target, will be described with reference to FIG.
A battery voltage value obtained by A / D conversion is output as V0 as an output value proportional to the current remaining battery level of the portable communication terminal 1 (step S11).

  Moreover, the internal temperature C of the portable communication terminal 1 is acquired by the above-described steps S1 to S4 (step S12). Further, with reference to Table B, the correction voltage V1 corresponding to each case where the internal temperature C is 0 ° C. or lower, 0 ° C. or higher and 30 ° C. or lower, 30 ° C. or higher and 50 ° C. or lower, and 50 ° C. or higher is determined (step S13). .

  Further, by adding this correction voltage V1 to V0 (V0 + V1) (step S14), a fixed battery voltage V is obtained (step S15). Then, based on the determined battery voltage V, the battery remaining amount display on the display unit 13 is performed.

  Thereby, in the portable communication terminal 1, it is possible to correct the problem of the battery remaining amount display that the display is more or less than the actual remaining amount due to the temperature change.

Next, the operation until the determination of the transmission output, which is an example of the temperature dependence control target, will be described with reference to FIG.
The portable communication terminal 1 detects the reception level with the radio base station, and acquires the transmission output adjustment value corresponding to the reception level value from the memory unit 14 (step S21). Then, the control unit 11 calculates the output voltage value V2 of the wireless transmission power amplifier 16-1 corresponding to the transmission output adjustment value (step S22).

  Then, the control part 11 acquires the internal temperature C of the portable communication terminal 1 by said step S1-S4 flow (step S23).

  Then, the output voltage correction value V3 of the wireless transmission power amplifier 16-1 for the internal temperature C is determined with reference to the table B (step S24).

  Further, by adding the output voltage correction value V3 thus determined to the voltage value V2 obtained in step S22 (V2 + V3), the optimum wireless transmission power amplifier 16 corresponding to the change in the internal temperature of the portable communication terminal 1 is obtained. -1 output voltage V4 (= V2 + V3) is obtained (step S25).

  Then, a transmission output adjustment value corresponding to the output voltage V4 of the wireless transmission power amplifier 16-1 is set in the memory unit 14 (step S26).

  Thereby, even if the internal temperature of the portable communication terminal 1 changes, stable transmission / reception can be carried out with the radio base station.

  The correction processing of the determined battery voltage and the output voltage of the wireless transmission power amplifier 16-1 as examples of the temperature dependence control target as described above can be obtained without using a temperature sensor that is a new additional device. Based on the obtained temperature information, it can be executed.

It is a block diagram which shows the structure of the portable communication terminal which is a correction apparatus with respect to the temperature dependence control object which concerns on embodiment of this invention. It is a block which shows the function of the correction apparatus with respect to the temperature dependence control object which concerns on embodiment of this invention. It is a flowchart which shows the internal temperature determination procedure of the portable communication terminal which is a correction | amendment apparatus with respect to the temperature dependence control object which concerns on embodiment of this invention. It is the table A which shows the internal temperature correction value of the portable communication terminal which is a correction apparatus with respect to the temperature dependence control object which concerns on embodiment of this invention for every terminal state. It is a flowchart which shows the determination procedure of the voltage value of the battery remaining display of the portable communication terminal which is a correction apparatus with respect to the temperature dependence control object which concerns on embodiment of this invention. It is a flowchart which shows the determination procedure of the transmission output of the portable communication terminal which is a correction | amendment apparatus with respect to the temperature dependence control object which concerns on embodiment of this invention. 7 is a table B showing a voltage value of a battery remaining amount display and a correction value of a transmission output with respect to an internal temperature of a portable communication terminal which is a correction device for a temperature-dependent control object according to an embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Portable communication terminal 11 Control part 11-1 Area determination means 11-2 Temperature determination means 11-3 Internal temperature prediction means 11-4 Battery remaining amount display / radio adjustment value correction means (correction means with respect to temperature dependence control object)
13 Display Unit 14 Memory Unit 16 Communication Unit (Transmission / Reception Unit)
16-1 Power amplifier for wireless transmission

Claims (7)

Area determining means for determining an area where the portable communication terminal is located;
Air temperature determination means for determining the temperature around the portable communication terminal based on the temperature information for each area and the area where the portable communication terminal is located,
By adding a correction value according to the operating state of the portable communication terminal to the ambient temperature of the portable communication terminal determined by the temperature determining means, the internal temperature of the portable communication terminal is calculated. An internal temperature prediction means for predicting the internal temperature of the portable communication terminal;
Correction means for correcting a temperature-dependent object based on the internal temperature of the portable communication terminal;
The correction apparatus with respect to the temperature dependence control object of a portable communication terminal characterized by the above-mentioned.   The portable communication according to claim 1, wherein the correction value is a value obtained by using a correction table created by predicting a temperature rise in each operation state of the portable communication terminal in advance. A correction device for a temperature-dependent control target of a terminal.   The apparatus according to claim 2, wherein the operation state of the portable communication terminal includes at least a standby state, a call state, a browsing state, and a charging state. .   The said correction | amendment means adds / subtracts the voltage correction value with a temperature characteristic, The correction apparatus with respect to the temperature dependence control object of the portable communication terminal in any one of Claims 1-3 characterized by the above-mentioned.   The said temperature dependence control object is the voltage correction for battery remaining display, The correction apparatus with respect to the temperature dependence control object of the portable communication terminal in any one of Claims 1-4 characterized by the above-mentioned.   The correction device for the temperature dependence control target of the portable communication terminal according to claim 1, wherein the temperature dependence control target is voltage correction of a power amplifier for wireless transmission. An area determining step for determining an area where the portable communication terminal is located;
A temperature determination step for determining the temperature around the portable communication terminal by the temperature information for each area and the area where the portable communication terminal is located;
By adding a correction value according to the operating state of the portable communication terminal to the ambient temperature of the portable communication terminal determined by the temperature determining means, the internal temperature of the portable communication terminal is calculated. A portable communication terminal temperature prediction step for predicting a temperature inside the portable communication terminal;
A correction step of correcting a temperature-dependent object based on the internal temperature of the portable communication terminal;
The correction method with respect to the temperature dependence control object of the portable communication terminal characterized by including this.

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