WO2017077770A1

WO2017077770A1 - Wireless device

Info

Publication number: WO2017077770A1
Application number: PCT/JP2016/076980
Authority: WO
Inventors: 彰一設楽
Original assignee: シャープ株式会社
Priority date: 2015-11-04
Filing date: 2016-09-13
Publication date: 2017-05-11

Abstract

In this wireless device which performs communication by aggregating a plurality of carriers, reduction in throughput is suppressed and temperature is controlled. A mobile device (100) is provided with: a transmission/reception unit (1) that transmits a plurality of radio signals simultaneously; a temperature detection unit (2) that detects the temperature inside the wireless device; and a temperature control unit (4) that performs first power restriction for reducing transmission power of at least one of the plurality of radio signals, when the temperature detected by the temperature detection unit reaches a first threshold or higher.

Description

Wireless device

One embodiment of the present invention relates to a wireless device that performs communication by bundling a plurality of carriers and a temperature control method for the wireless device.

As a technique for controlling temperature in a wireless device that performs communication by bundling a plurality of carriers, Patent Document 1 discloses a mobile device having a carrier aggregation function, which transmits and receives wireless signals to and from a base station. A temperature detection unit that detects a temperature of the mobile station, determines whether the detected temperature is equal to or higher than a predetermined stop threshold, and measures the radio quality of the primary cell and the secondary cell provided by the base station A wireless quality measurement unit, and a carrier aggregation control unit that controls a primary cell and a secondary cell set in the mobile station by the base station, and the detected temperature is equal to or higher than a predetermined stop threshold When the detection unit determines, the carrier aggregation control unit stops the use of the set secondary cell. Mobile station are described for performing cell restriction process for.

Japanese Patent Publication “Japanese Patent Laid-Open No. 2014-216909 (published on November 17, 2014)”

However, in the mobile device described in Cited Document 1, when the temperature detection unit determines that the detected temperature of the mobile device is equal to or higher than a predetermined stop threshold, the carrier aggregation control unit uses the set secondary cell. Since it stops, the bandwidth that can be used for communication decreases and the throughput decreases.

One embodiment of the present invention has been made in view of the above problems, and a main object thereof is to control temperature while suppressing a decrease in throughput in a wireless device that performs communication by bundling a plurality of carriers. It is to provide the technology for.

In order to solve the above problems, a wireless device according to one embodiment of the present invention is a wireless device that performs communication by bundling a plurality of carriers, and simultaneously transmits a plurality of wireless signals having different frequency bands. And a temperature detection unit for detecting the temperature inside the wireless device, and transmission of one or more wireless signals among the plurality of wireless signals when the temperature detected by the temperature detection unit is equal to or higher than a first threshold value. And a temperature control unit that executes a first power limit for reducing power.

According to one embodiment of the present invention, in a wireless device that performs communication by bundling a plurality of carriers, temperature can be controlled while suppressing a decrease in throughput.

It is a block diagram which shows the structure of the radio | wireless apparatus which concerns on embodiment of this invention. It is a flowchart explaining the temperature control method which concerns on Embodiment 1 of this invention. It is a flowchart explaining the temperature control method which concerns on Embodiment 2 of this invention. It is a flowchart explaining the temperature control method which concerns on Embodiment 3 of this invention. It is a flowchart explaining the temperature control method which concerns on Embodiment 4 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following embodiments, an example in which the wireless device according to the present invention is realized as a mobile device (mobile communication device) is described, but the wireless device according to the present invention is not limited to a mobile device.

Embodiment 1
(Mobile device 100)
A mobile device 100 according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of mobile device 100. As shown in FIG. 1, the mobile device 100 includes a transmission / reception unit (transmission unit) 1, a temperature detection unit 2, a transmission power monitoring unit 3, and a temperature control unit 4.

The mobile device 100 has a function of bundling a plurality of carriers and performing communication. “Communicating by bundling a plurality of carriers” means performing wireless communication with high throughput by simultaneously performing communication using a plurality of carriers (carrier waves) having different center frequencies. As a technique for bundling a plurality of carriers and performing communication, for example, carrier aggregation that performs communication with the same base station, dual connectivity (Dual で Connectivity) that performs communication with a plurality of base stations, and the like. Can be mentioned. That is, the mobile device 100 can be a wireless device having at least one of a carrier aggregation function and a dual connectivity function. As an example, the mobile device 100 performs transmission / reception with the primary cell provided by the base station in Band 1 (transmission band: 1920 MHz to 1980 MHz, reception band: 2110 MHz to 2170 MHz) of the LTE band, and Band 5 (transmission band: 824 MHz) of the LTE band. (849 MHz, reception band: 869 MHz to 894 MHz), it is possible to perform transmission / reception with the secondary cell provided by the base station, but is not limited thereto. For example, the mobile device 100 may be configured to transmit and receive with a primary cell and a secondary cell in different channels of the same LTE band. Further, mobile device 100 may be configured to perform communication by bundling a plurality of carriers only for transmission signals.

(Transceiver 1)
The transmission / reception unit 1 is a part that performs wireless communication. In order to realize a function of performing communication by bundling a plurality of carriers, the transmission / reception unit 1 includes a plurality of wireless blocks, and simultaneously transmits a plurality of wireless signals having different frequency bands. The process is to be executed. That is, the transmission / reception unit 1 includes a primary cell radio block 6 for transmitting / receiving radio signals to / from the primary cell, and a secondary cell radio block 7 for transmitting / receiving radio signals to / from the secondary cell. However, one embodiment of the present invention is not limited thereto, and may further include one or more secondary cell radio blocks. Moreover, the structure which is not limited for each radio | wireless block for primary cells or secondary cells may be sufficient. The transmission / reception unit 1 also includes a modulation / demodulation processing unit 8.

The primary cell radio block 6 includes an antenna 9, a coupler 10, a duplexer 11, an LNA 12, a local oscillator Lo1, a mixer 13, an A / D converter 14, a power amplifier 15, a local oscillator Lo2, a mixer 16 and a D / A converter 17. ing. The secondary cell radio block 7 includes an antenna 18, a coupler 19, a duplexer 20, an LNA 21, a local oscillator Lo3, a mixer 22, an A / D converter, a power amplifier 24, a local oscillator Lo4, a mixer 25, and a D / A converter 26. Yes. Note that the configuration of each wireless block is not limited to this.

Subsequently, each element of the primary cell radio block 6 will be described. In addition, since each element of the radio | wireless block 7 for secondary cells is an element similar to each element corresponding to the radio | wireless block 6 for primary cells, description is abbreviate | omitted.

The modulation / demodulation processing unit 8 modulates the radio signal to be transmitted and demodulates the received radio signal. The radio signal modulated by the modulation / demodulation processing unit 8 is converted into an analog signal by the D / A converter 17, mixed with the signal generated by the local oscillator Lo 2 by the mixer 16, and amplified by the power amplifier 15. The duplexer 11 outputs the radio signal amplified by the power amplifier 15 to the antenna 9 and outputs the radio signal received by the antenna 9 to an LNA (Low （Noise Amplifier) 12. The radio signal received by the antenna 9 is amplified by the LNA 12, mixed with the signal generated by the local oscillator Lo 1 by the mixer 13, converted into a digital signal by the A / D converter 14, and demodulated by the modulation / demodulation processing unit 8. The coupler 10 is interposed between the antenna 9 and the duplexer 11, and outputs a part of the transmission power of the radio signal output from the duplexer 11 to the antenna 9 to the transmission power monitor unit 3.

(Temperature detector 2 and transmission power monitor 3)
The temperature detection unit 2 detects the temperature inside the mobile device 100 and outputs the detection result to the temperature control unit 4. Examples of the temperature detection unit 2 include a temperature sensor. For example, the temperature detection unit 2 is provided around an element that generates heat due to transmission of a wireless signal such as a CPU (not shown) included in the power amplifier 15, the power amplifier 24, and the mobile device 100, or an element that is easily affected by a temperature rise. However, it is not limited to these places.

The transmission power monitor unit 3 monitors (monitors) the transmission power of the radio signal transmitted by each radio block. As described above, the

couplers

10 and 19 output a part of the transmission power of the radio signal transmitted by each radio block to the transmission power monitor unit 3, and the transmission power monitor unit 3 By detecting the power input from 19, the transmission power of the radio signal transmitted by each radio block is monitored.

(Temperature controller 4)
The temperature control unit 4 includes a transmission power control unit 5. The temperature control unit 4 controls the transmission power of the radio signal transmitted in each radio block via the transmission power control unit 5 according to the temperature inside the mobile device 100 detected by the temperature detection unit 2. Thereby, the temperature control unit 4 controls the temperature inside the mobile device 100.

The transmission power control unit 5 is based on the difference between the transmission power value of the radio signal to be controlled monitored by the transmission power monitoring unit 3 and the target value of the transmission power, and the radio signal ( By controlling the power of the transmission signal) and the voltage of the power amplifier 15 and the power amplifier 24, the value of the transmission power of the radio signal to be controlled can be controlled to the target value of the transmission power.

(Temperature control method)
FIG. 2 is a flowchart for explaining an example of the temperature control method of the mobile device 100 according to the present embodiment. Each step shown in the figure may be started when the mobile device 100 is activated, may be started when the mobile device 100 starts transmission / reception with the base station, and may be started at an arbitrary timing. In addition, the mobile device 100 may repeatedly execute the steps illustrated in FIG. 2 while being activated.

First, the temperature detection unit 2 detects the temperature inside the mobile device 100 (S0, temperature detection step). And the temperature control part 4 determines whether the temperature which the temperature detection part 2 detected is more than a 1st threshold value (S1), and the said temperature is less than a 1st threshold value (NO of S1). , The process returns to S0. When the said temperature is more than a 1st threshold value (YES of S1), the temperature control part 4 is 1st which reduces the transmission power of one or more radio signals among the several radio signals transmitted by the transmission / reception part 1. The power limit is executed (S2, temperature control step). More specifically, when the temperature control unit 4 executes the first power limitation, the transmission power control unit 5 sets the transmission power of the one or more radio signals to be equal to or less than a predetermined limit value. Control. Thereby, transmission power is reduced and the temperature inside the mobile device 100 is reduced.

In addition, the method by which the temperature control unit 4 selects the one or more radio signals to be subjected to power restriction is not particularly limited. For example, the radio signal transmitted in the primary cell radio block 6 is selected. Alternatively, the radio signal transmitted in the secondary cell radio block 7 may be selected. Further, as will be described later, the temperature control unit 4 may select the one or more radio signals with reference to information regarding the communication status of the plurality of radio signals transmitted by the transmission / reception unit 1.

The first threshold value can be set to an arbitrary value, but in order to prevent a malfunction or failure due to a temperature rise and to prevent unnecessary power limitation due to the temperature immediately exceeding the threshold value. It is preferable that the temperature is set to a higher value that is lower than the temperature at which a malfunction or failure due to temperature rise may occur and that is far from the normal temperature inside the mobile device 100. The first threshold value may be in the range of 50 ° C. or higher and 70 ° C. or lower, and preferably in the range of 50 ° C. or higher and 60 ° C. or lower, although it depends on the terminal design, the arrangement of the temperature detection unit, and the like. Moreover, it is preferable that the predetermined limit value described above is a value of transmission power that allows the temperature inside mobile device 100 to be lowered below the first threshold. Such a limit value may be obtained experimentally based on, for example, the first threshold value. When there are a plurality of radio signals subject to power limitation, the limit values may be different depending on each radio signal, or all may be the same.

Then, the temperature control unit 4 performs the first power restriction, and the temperature detected by the temperature detection unit 2 is the first threshold value −Δ ° C. The second threshold value (Δ ° C. is, for example, several degrees C.) However, it is determined whether or not Δ ° C is lower than 0 ° C (S3), and while the temperature detected by the temperature detection unit 2 is equal to or higher than the second threshold (in S3) NO), the process of S3 is repeated. On the other hand, when the temperature detected by the temperature detector 2 is lower than the second threshold (YES in S3), the temperature controller 4 releases the first power restriction (S4).

The second threshold value may be a value equal to or lower than the first threshold value, but is preferably lower than the first threshold value. Thereby, it is possible to prevent the first power limit and the cancellation of the power limit from being repeated frequently.

In the present embodiment, the mobile device 100 reduces the transmission power of one or more wireless signals among a plurality of wireless signals transmitted by the transmission / reception unit 1 when the temperature inside the wireless device rises to a first threshold value or more. The first temperature control is executed. Therefore, according to this configuration, temperature control can be executed without stopping transmission / reception of signals, so that a decrease in throughput due to temperature control can be suppressed. Thereby, in a wireless device having a function of performing communication by bundling a plurality of carriers, temperature can be controlled while suppressing a decrease in throughput.

In the present embodiment, the mobile device 100 releases the power restriction when the temperature inside the mobile device 100 becomes lower than the second threshold value by the first power control. Thereby, unnecessary power limitation can be prevented, and a decrease in throughput associated with temperature control can be further suppressed.

Further, in the present embodiment, the mobile device 100 is configured such that the transmission power of one or more radio signals among the plurality of radio signals transmitted by the transmission / reception unit 1 is less than or equal to a predetermined limit value. 1 power limit is performed. Thereby, since the mobile device 100 can easily determine the target value of the transmission power of the radio signal in the first power limitation, the power limitation for the temperature control of the wireless device is performed with a simple process. be able to.

[Embodiment 2]
The following describes Embodiment 2 of the present invention with reference to the drawings. The second embodiment is the same as the first embodiment except for the temperature control method executed by the mobile device 100 (the temperature control unit 4 thereof). Hereinafter, the description of members having the same functions as those described in the first embodiment will be omitted.

In the present embodiment, the temperature control unit 4 executes the first power limit so that the sum of the plurality of radio signals transmitted by the transmission / reception unit 1 is equal to or less than a predetermined value.

FIG. 3 is a flowchart for explaining the temperature control method according to this embodiment. In addition, each process of S10, 11, 13, 14 shown in FIG. 3 respond | corresponds to each process of S0, 1, 3, 4 shown in FIG. 2, respectively, and detailed description is abbreviate | omitted.

First, the temperature detection unit 2 detects the temperature inside the mobile device 100 (S10, temperature detection step). And the temperature control part 4 determines whether the temperature detected by the temperature detection part 2 is more than a 1st threshold value (S11), and when the said temperature is less than a 1st threshold value (NO of S11). , The process returns to S10. When the said temperature is more than a 1st threshold value (YES of S11), the temperature control part 4 is 1st which reduces the transmission power of one or more radio signals among the several radio signals transmitted by the transmission / reception part 1. The power limit is executed (S12, temperature control step). In the present embodiment, the temperature control unit 4 executes the first power limit so that the total transmission power of the plurality of radio signals is equal to or less than a predetermined limit value. Then, the temperature controller 4 determines whether or not the temperature detected by the temperature detector 2 is lower than the second threshold (S13), and the temperature detected by the temperature detector 2 is equal to or higher than the second threshold. In the meantime (NO in S13), the process of S13 is repeated. When the temperature detected by the temperature detection unit 2 is lower than the second threshold (YES in S13), the temperature control unit 4 releases the first power limit (S14).

It should be noted that the predetermined limit value in the present embodiment is preferably a total value of transmission power that can lower the temperature inside mobile device 100 below the first threshold. Such a limit value may be obtained experimentally based on, for example, the first threshold value. The total value of the transmission power is considered to be closely related to the amount of heat generated when the mobile device 100 transmits a radio signal. Therefore, in this embodiment, the mobile device 100 can more appropriately suppress the heat generation amount of the entire wireless device by limiting the total value of the transmission power.

[Embodiment 3]
Embodiment 3 of the present invention will be described below with reference to the drawings. The third embodiment is the same as the first embodiment except for the temperature control method executed by the mobile device 100 (the temperature control unit 4 thereof). Hereinafter, the description of members having the same functions as those described in the first embodiment will be omitted.

In the present embodiment, the temperature control unit 4 selects one or more radio signals from the plurality of radio signals with reference to the information regarding the communication status of the plurality of radio signals transmitted by the transmission / reception unit 1 and selects the selected radio signals. The transmission power of the radio signal is controlled to be equal to or less than a predetermined limit value.

FIG. 4 is a flowchart for explaining the temperature control method according to this embodiment. In addition, each process of S20, 21, 24, 25 shown in FIG. 4 respond | corresponds to each process of S0, 1, 3, 4 shown in FIG. 2, respectively, and detailed description is abbreviate | omitted.

First, the temperature detection unit 2 detects the temperature inside the mobile device 100 (S20, temperature detection step). And the temperature control part 4 determines whether the temperature which the temperature detection part 2 detected is more than a 1st threshold value (S21), and the said temperature is less than a 1st threshold value (NO of S21). , The process returns to S20. When the temperature is equal to or higher than the first threshold value (YES in S21), the temperature control unit 4 executes the first power restriction with reference to information regarding the communication status of the plurality of radio signals transmitted by the transmission / reception unit 1. The radio signal to be selected is selected (S22, temperature control step).

Examples of information related to the communication status of the plurality of radio signals include frequency bands of the plurality of radio signals, radio communication quality in the frequency bands of the plurality of radio signals, and frequencies of the plurality of radio signals. The priority of the band, the buffer amount stored in the transmission / reception unit 1 for each of the plurality of radio signals, and the like can be given. The information referred to by the temperature control unit 4 may be one of these or a plurality of information. In addition, when the temperature control unit 4 refers to each frequency band of the plurality of radio signals and selects a radio signal for executing the first power limit, for example, the temperature control unit 4 selects a radio signal having a higher frequency. Alternatively, a radio signal having a lower frequency may be selected. In addition, when the temperature control unit 4 selects a radio signal for executing the first power limitation with reference to the radio communication quality in each frequency band of the plurality of radio signals, for example, S / N (signal to noise) Ratio), C / N (carrier-to-noise ratio), RSSI (received signal strength), etc., or a radio signal with a worse or better radio communication quality may be selected. Further, when the temperature control unit 4 refers to the priority level of each frequency band of the plurality of radio signals and selects the radio signal for executing the first power restriction, the temperature control unit 4 prioritizes the frequency band associated with the frequency signal in advance. Referring to the correspondence relationship with the degree, the priority degree corresponding to each frequency band of the plurality of wireless signals is determined, and a wireless signal with a lower or higher determined transmission priority is selected. Good. In addition, when the temperature control unit 4 selects a radio signal for executing the first power restriction with reference to the buffer amount of the transmission data stored in the transmission / reception unit 1 of each of the plurality of radio signals, A radio signal having a smaller buffer amount or a larger buffer amount may be selected. The buffer amount of transmission data stored in the transmission / reception unit 1 is, for example, that the modulation / demodulation processing unit 8 sequentially modulates and outputs unmodulated radio signals stored in a work memory or the like. Means the amount of unmodulated radio signal data stored in the work memory or the like.

Next, the temperature control unit 4 executes the first power limitation on the radio signal selected in the step S22 (S23, temperature control step). In the present embodiment, the temperature control unit 4 controls, for example, the transmission power of the radio signal selected in the step S22 to be equal to or less than a predetermined limit value. Then, the temperature controller 4 determines whether or not the temperature detected by the temperature detector 2 is lower than the second threshold (S24), and the temperature detected by the temperature detector 2 is equal to or higher than the second threshold. In the meantime (NO in S24), the process of S24 is repeated. When the temperature detected by the temperature detection unit 2 is lower than the second threshold (YES in S24), the temperature control unit 4 releases the first power restriction (S25).

In the present embodiment, the mobile device 100 can appropriately select a radio signal for performing power limitation by referring to information on the communication status of a plurality of radio signals. Thereby, electric power restriction can be performed more suitably. In addition, information on the communication status of a plurality of radio signals, the frequency band of each of the plurality of radio signals, the radio communication quality in each frequency band of the plurality of radio signals, the priority degree of each frequency band of the plurality of radio signals, In addition, each of the plurality of radio signals has one or more pieces of information selected from the group consisting of a buffer amount of transmission data stored in the transmission unit, so that the frequency band of each of the plurality of radio signals is high or low. , Wireless communication quality (for example, S / N, C / N, RSSI, etc.) in each frequency band of the plurality of radio signals, priority of each frequency band of the plurality of radio signals, and the plurality of radio signals The radio signal for performing the power limitation can be appropriately selected based on the criterion such as the buffer amount of the transmission data stored in the transmission unit. Thereby, electric power restriction can be performed more suitably.

In one modification, in S23, as in the second embodiment, the temperature control unit 4 has the total transmission power of the plurality of radio signals transmitted in the transmission / reception unit 1 equal to or less than a predetermined limit value. As described above, the transmission power of the radio signal selected in step S22 may be controlled. Thereby, the effect of Embodiment 2 can be acquired collectively.

[Embodiment 4]
Embodiment 4 of the present invention will be described below with reference to the drawings. The fourth embodiment is the same as the first embodiment except for the temperature control method executed by the mobile device 100 (the temperature control unit 4 thereof). The first temperature restriction is performed in the same manner as in the first, second, or third embodiment. Hereinafter, the description of members having the same functions as those described in the first embodiment will be omitted.

In the present embodiment, the temperature control unit 4 is transmitted from the transmission / reception unit 1 when the temperature detected by the temperature detection unit is equal to or higher than the third threshold value after a predetermined time has elapsed since the execution of the first power limit. A second power limitation is further performed to further reduce transmission power of one or more radio signals among the plurality of radio signals.

FIG. 5 is a flowchart for explaining the temperature control method according to the present embodiment. In addition, each process of S30, 31, 36 shown in FIG. 5 respond | corresponds to each process of S0, 1, 4 shown in FIG. 2, respectively, and detailed description is abbreviate | omitted. Further, the process of S32 shown in FIG. 5 corresponds to S2, S12, or S22 and 23 shown in FIGS.

First, the temperature detection unit 2 detects the temperature inside the mobile device 100 (S30, temperature detection step). And the temperature control part 4 determines whether the temperature detected by the temperature detection part 2 is more than a threshold value (S31), and when the said temperature is less than a threshold value (NO of S31), it returns to the process of S10. . When the said temperature is more than a threshold value (YES of S31), 1st electric power restriction | limiting is performed similarly to S2, S12, or S22 and 23 in Embodiment 1, 2, or 3 (S32, temperature control process). And the temperature control part 4 determines whether the temperature which the temperature detection part 2 detected is lower than a 1st threshold value (S33).

In S33, when the temperature detected by the temperature detection unit 2 is equal to or higher than the first threshold (NO in S33), the temperature control unit 4 first waits for a predetermined time after executing the first power limit. Then, it is determined whether or not the temperature detected by the temperature detection unit 2 is lower than a third threshold after a predetermined time has elapsed since the first power limit was executed (S34). When the temperature detected by the temperature detection unit 2 is lower than the third threshold (YES in S34), the temperature control unit 4 returns to the process of S33. On the other hand, when the temperature detected by the temperature detection unit 2 is equal to or higher than the third threshold (NO in S34), the temperature control unit 4 includes one or more radio signals among the plurality of radio signals transmitted from the transmission / reception unit 1. The second power limitation for further reducing the transmission power is executed (S35), and the process returns to S34. In the second power limitation, for example, the temperature control unit 4 further reduces the transmission power of each radio signal that has already been reduced at the time of the first power limitation by a predetermined amount (for example, 1 dB). At the second power limitation after the second time, for example, the temperature control unit 4 further reduces the transmission power of each radio signal that has already been reduced at the previous second power limitation by a predetermined amount (for example, 1 dB). May be.

It is preferable that the third threshold value is smaller than the first threshold value. Thereby, in a state where a predetermined time has elapsed from the start of execution of the first power limit, when the expected temperature decrease (temperature decrease to a temperature equal to or lower than the third threshold) is not achieved, the second power limit is set. By executing, the expected temperature drop can be achieved.

In S33, when the temperature detected by the temperature detection unit 2 is lower than the second threshold (YES in S33), the temperature control unit 4 releases the first power restriction (S36). At this time, if the second power control is being executed, the second power control is also released.

In this embodiment, the mobile device 100 has a temperature detected by the temperature detection unit equal to or higher than the third threshold after a predetermined time has elapsed from the start of execution of the first power restriction, and the effect of temperature control by the first power restriction. Can achieve a desired degree of temperature control by executing a second power limit that further reduces the transmission power of one or more radio signals of the plurality of radio signals when it can.

[Example of software implementation]
The control block (particularly the temperature control unit 4) of the mobile device 100 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or software using a CPU (Central Processing Unit). It may be realized by.

In the latter case, the mobile device 100 includes a CPU that executes instructions of a program that is software that implements each function, a ROM (Read Only Memory) in which the program and various data are recorded so as to be readable by a computer (or CPU), or A storage device (these are referred to as “recording media”), a RAM (Random Access Memory) for expanding the program, and the like are provided. The computer (or CPU) reads the program from the recording medium and executes the program, thereby achieving the object of one embodiment of the present invention. As the recording medium, a “non-temporary tangible medium” such as 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 an arbitrary transmission medium (such as a communication network or a broadcast wave) that can transmit the program. Note that one embodiment of 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 wireless device (100) according to an aspect 1 of the present invention is a wireless device that performs communication by bundling a plurality of carriers, and simultaneously transmits a plurality of wireless signals having different frequency bands (transmission / reception unit 1). A temperature detector (2) for detecting the temperature inside the wireless device, and one or more wireless signals among the plurality of wireless signals when the temperature detected by the temperature detector is equal to or higher than a first threshold value. And a temperature control unit (4) that executes a first power limit for reducing the transmission power of the first power.

According to the above configuration, when the temperature inside the wireless device rises above the first threshold, the temperature control is executed by reducing the transmission power of the signal. Therefore, according to this configuration, temperature control can be executed without stopping transmission / reception of signals, so that a decrease in throughput due to temperature control can be suppressed. Thereby, in a wireless device that performs communication by bundling a plurality of carriers, the temperature can be controlled while suppressing a decrease in throughput.

In the wireless device (100) according to aspect 2 of the present invention, in the aspect 1, the temperature control unit (4) detects the temperature detected by the temperature detection unit (2) while executing the first power restriction. When the value becomes lower than the second threshold, the first power limit is released.

According to the above configuration, when the temperature inside the wireless device becomes lower than the second threshold value, the power limitation can be canceled, so that unnecessary power limitation can be prevented, and the throughput associated with the temperature control can be prevented. The decrease can be further suppressed.

In the wireless device (100) according to aspect 3 of the present invention, in the aspect 1 or 2, the temperature control unit (4) is configured such that the transmission power of the one or more wireless signals is equal to or less than a predetermined value. As described above, the first power limitation is performed.

According to the above configuration, power limitation for temperature control of the wireless device can be performed with simple processing.

In the wireless device (100) according to aspect 4 of the present invention, in the aspect 1 or 2, the temperature control unit (4) is configured such that the total transmission power of the plurality of wireless signals is equal to or less than a predetermined value. As described above, the first power limitation is performed.

According to the above configuration, the amount of heat generated by the entire wireless device can be more appropriately suppressed by limiting the total value of the transmission power.

In the wireless device (100) according to aspect 5 of the present invention, in the aspect 1 or 2, the temperature control unit (4) refers to the information regarding the communication status of the plurality of wireless signals, and the plurality of wireless signals To select the one or more radio signals.

According to the above configuration, it is possible to appropriately select a radio signal for performing power limitation by referring to information on the communication status of a plurality of radio signals. Thereby, electric power restriction can be performed more suitably.

In the wireless device (100) according to aspect 6 of the present invention, in the aspect 5, the information regarding the communication status of the plurality of wireless signals includes the frequency band of each of the plurality of wireless signals, and each of the plurality of wireless signals. One selected from the group consisting of radio communication quality in the frequency band, priority of each frequency band of the plurality of radio signals, and a buffer amount stored in the transmission unit of each of the plurality of radio signals This is the information above.

According to the above configuration, the frequency band of each of the plurality of radio signals, the radio communication quality (for example, S / N, C / N, RSSI, etc.) in each frequency band of the plurality of radio signals, Appropriately select a radio signal to be subjected to power limitation based on criteria such as the priority of each frequency band of the plurality of radio signals and the buffer amount stored in the transmission unit of each of the plurality of radio signals. be able to. Thereby, electric power restriction can be performed more suitably.

In the wireless device (100) according to aspect 7 of the present invention, in the above aspects 1 to 6, the temperature control unit (4) is configured such that the temperature detection unit (4) When the temperature detected in 2) is equal to or higher than the third threshold, the second power limitation is further performed to further reduce the transmission power of one or more radio signals among the plurality of radio signals.

According to the above configuration, the temperature detected by the temperature detection unit is equal to or higher than the third threshold after a predetermined time has elapsed from the start of execution of the first power limit, and the effect of temperature control by the first power limit is desired. If not, it is possible to achieve a desired degree of temperature control by executing the second power limit that further reduces the transmission power of one or more radio signals of the plurality of radio signals.

A temperature control method according to aspect 8 of the present invention is a temperature control method for a wireless device executed by a wireless device that performs communication by bundling a plurality of carriers, and simultaneously transmits a plurality of wireless signals having different frequency bands. A transmitting step, a temperature detecting step for detecting a temperature inside the wireless device, and one or more wireless signals among the plurality of wireless signals when the temperature detected in the temperature detecting step is equal to or higher than a first threshold value. And a temperature control step of executing a first power limit for reducing the transmission power of the first power limit.

According to the above configuration, the same effect as in the first aspect is obtained.

One aspect of the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and the technical means disclosed in different embodiments can be appropriately combined. Such embodiments are also included in the technical scope of one aspect of the present invention.

100: mobile device, 1: transmission / reception unit (transmission unit), 2: temperature detection unit, 4: temperature control unit

Claims

A wireless device that performs communication by bundling a plurality of carriers,
A transmitter that simultaneously transmits a plurality of radio signals having different frequency bands;
A temperature detector for detecting the temperature inside the wireless device;
A temperature control unit that executes a first power limit for reducing transmission power of one or more radio signals among the plurality of radio signals when the temperature detected by the temperature detection unit is equal to or higher than a first threshold; A wireless device comprising:
The temperature control unit cancels the first power limitation when the temperature detected by the temperature detection unit is lower than a second threshold during execution of the first power limitation. The wireless device according to claim 1.
The temperature control unit executes the first power limit so that a sum of transmission powers of the plurality of radio signals is equal to or less than a predetermined value. Wireless devices.
4. The temperature control unit according to claim 1, wherein the temperature control unit selects the one or more radio signals from the plurality of radio signals with reference to information on communication states of the plurality of radio signals. The wireless device according to one item.
When the temperature detected by the temperature detection unit is equal to or higher than a third threshold after a predetermined time has elapsed from the start of execution of the first power limit, the temperature control unit is configured to receive one or more of the plurality of radio signals. The radio apparatus according to any one of claims 1 to 4, wherein a second power limit for further reducing the transmission power of the radio signal is executed.