JP2018182657A - Control device and control method of radio communication apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve appropriate interference avoidance with the simplified arrangement at a radio communication apparatus capable of communication via a plurality of radio communication schemes.SOLUTION: A control device of a radio communication apparatus capable of communication via a first radio communication scheme and a second communication scheme comprises: determination means that determines whether a difference between a frequency used in the first radio communication scheme and a frequency used in the second communication scheme is equal to or below a predetermined value; detection means that detects a duplex system used in the first radio communication scheme; and control means that performs control so as to avoid interference between communication via the first radio communication scheme and communication via the second radio communication scheme depending on the duplex system detected by the detection means when the determination means determines the difference between the two frequencies to be equal to or below the predetermined value.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a control apparatus and control method of a wireless communication apparatus.

  In recent years, devices equipped with wireless communication means, such as mobile phones, have become widely used. In wireless communication, there is a possibility that communication may be interfered by an interference source such as used frequencies close or overlapping. As a technique for avoiding such interference, in Patent Document 1, interference is avoided by changing the communication frequency according to the presence or absence of an interference wave. Moreover, in patent document 2, interference is avoided by detecting the timing which an interference wave generate | occur | produces using an interference wave detection circuit.

JP-A-7-15391 JP, 2000-224176, A

  In LTE (Long Term Evolution) mobile communication systems, which are currently spreading, the following two duplex systems are defined to realize two-way communication. Two duplexing methods are TDD (Time Division Duplex) and FDD (Frequency Division Duplex). Also, in the same frequency band, which duplexing scheme to use depends on the country or region. For example, a frequency band around 2500 MHz to 2700 MHz is allocated for FDD in Europe and for TDD in North America.

Since a wireless LAN communication system may use a frequency band in the vicinity of 2400 MHz to 2500 MHz adjacent to the above-described frequency band, it is necessary to avoid interference with the LTE mobile communication system.
However, Patent Document 1 and Patent Document 2 do not disclose an interference avoidance technique in a communication apparatus that can communicate by a plurality of different wireless communication methods (for example, wireless LAN communication and LTE communication). Moreover, when the interference avoidance technology of Patent Document 1 is adopted, the frequency band is always changed in order to avoid interference, so that the communication frequency may be changed even when the interference can be avoided without changing the communication frequency. become. When the interference avoidance technology of Patent Document 2 is employed, the timing at which an interference wave is generated has to be detected, so the load on the communication apparatus becomes large.

  The present invention has been made in view of the above problems, and an object of the present invention is to enable appropriate interference avoidance with a simple configuration in a communication device that can communicate by a plurality of wireless communication methods.

  In order to solve the problems described above, a control device of a wireless communication device according to one aspect of the present invention is a control device of a wireless communication device capable of communicating with a first wireless communication method and a second wireless communication method. Determining means for determining whether a difference between a frequency used in the communication of the first wireless communication system and a frequency used in the communication of the second wireless communication system is equal to or less than a predetermined value; Detection means for detecting a duplex method used in the wireless communication method, and the duplex method detected by the detection means when the determination means determines that the difference between the two frequencies is equal to or less than the predetermined value And control means for performing control to avoid interference between the communication according to the first wireless communication method and the communication according to the second wireless communication method.

  According to the present invention, in a wireless communication apparatus that can communicate by a plurality of wireless communication methods, appropriate interference can be avoided with a simple configuration.

BRIEF DESCRIPTION OF THE DRAWINGS The block diagram of the radio | wireless communication apparatus which concerns on Embodiment 1 of this invention. 6 is a flowchart illustrating the operation of the communication control unit according to the first embodiment. FIG. 2 is a hardware configuration diagram of the wireless communication device according to the first embodiment. 7 is a flowchart for explaining the operation of the communication control unit according to the second embodiment. FIG. 7 is a block diagram of a wireless communication device according to a third embodiment. 10 is a flowchart for explaining the operation of the communication control unit according to the third embodiment. Explanatory drawing of the intermittent reception period which concerns on Embodiment 3. FIG. 10 is a flowchart for explaining the operation of the communication control unit according to the fourth embodiment. Explanatory drawing of the intermittent reception period which concerns on Embodiment 4. FIG. 15 is a flowchart for explaining the operation of the communication control unit according to the fifth embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The following embodiments do not limit the present invention, and all combinations of the features described in the present embodiment are not necessarily essential to the solution means of the present invention. The configuration of the embodiment can be appropriately modified or changed according to the specifications of the apparatus to which the present invention is applied and various conditions (usage conditions, environment of use, etc.).

Embodiment 1
(Configuration of wireless communication device)
FIG. 1 shows the configuration of functional modules involved in wireless communication of the wireless communication device 10 according to the first embodiment of the present invention.
The wireless communication device 10 includes a wireless LAN communication unit 11, a wireless LAN antenna 12, an LTE communication unit 13, an LTE antenna 14, and a communication control unit 15. The wireless LAN communication unit 11 and the LTE communication unit 13 are connected to the communication control unit 15. The wireless LAN antenna 12 is connected to the wireless LAN communication unit 11. The LTE antenna 14 is connected to the LTE communication unit 13.
The wireless communication device 10 according to the present embodiment can communicate in two wireless communication systems by providing the wireless LAN communication function and the LTE communication function. Also, the LTE communication function of the wireless communication device 10 includes a communication function of the FDD method and a communication function of the TDD method.
The wireless LAN communication unit 11 performs wireless LAN communication. The wireless LAN antenna 12 is an antenna for wireless LAN communication. Wireless LAN communication is, for example, communication based on the IEEE 802.11 standard series.

The LTE communication unit 13 performs LTE communication. The LTE antenna 14 is an antenna for LTE communication. LTE communication is an example of mobile communication and may be referred to as high-speed mobile data communication.
The LTE communication unit 13 includes an LTE-FDD communication processing unit 301 and an LTE-TDD communication processing unit 302. The LTE-FDD communication processing unit 301 performs LTE-FDD communication processing. The LTE-TDD communication processing unit 302 performs LTE-TDD communication processing. For example, considering communication between a base station (master station) and a terminal (child station), in LTE-FDD communication, the frequency used for communication from the base station to the terminal and communication from the terminal to the base station Different frequencies are used. In LTE-TDD communication, in communication from a base station to a terminal and communication from a terminal to a base station, the same frequency is switched and used for each time (time slot divided).
The communication control unit 15 includes a wireless LAN communication frequency detection unit 501, an LTE communication frequency detection unit 502, a duplex method detection unit 503, and an interference avoidance control unit 504. The communication control unit 15 is a control unit for controlling the wireless LAN communication unit 11 and the LTE communication unit 13 and processing data.

The wireless LAN communication frequency detection unit 501 detects the current communication frequency of the wireless LAN communication unit 11. The LTE communication frequency detection unit 502 detects the current communication frequency of the LTE communication unit 13. The duplex scheme detection unit 503 detects the current duplex scheme of the LTE communication unit 13. That is, the duplex method detection unit 503 detects whether the LTE communication unit 13 is performing LTE-FDD communication or is performing LTE-TDD communication. The interference avoidance control unit 504 performs control to avoid interference based on the detection contents of the three detection units 501 to 503 described above. Details of the interference avoidance control will be described based on FIG.

  Each functional module shown in FIG. 1 is realized by software or hardware. When implemented by software, a program for providing the function of each functional module described above is stored in a memory such as a ROM (storage unit 23 described later). The stored program is appropriately read to the RAM, and the CPU constituting the control unit 21 described later executes the functions to realize the functions of the functional modules. On the other hand, in the case of hardware implementation, for example, by using a predetermined compiler, a dedicated circuit may be automatically generated on the FPGA from a program for realizing the function of each functional module. FPGA is an abbreviation for Field Programmable Gate Array. Further, a Gate Array circuit may be formed in the same manner as an FPGA and realized as hardware. Also, it may be realized by an application specific integrated circuit (ASIC). The configuration of the functional modules shown in FIG. 1 is an example, and a plurality of functional modules may constitute one functional module, or any functional module may be divided into modules performing a plurality of functions. It is also good.

(Operation of communication control unit)
The operation of the communication control unit 15 in the wireless communication device 10 will be described with reference to FIG. The communication control unit 15 of the present embodiment performs control to reduce / avoid interference of wireless LAN communication with LTE communication. In the present embodiment, it is assumed that the wireless communication device 10 is simultaneously performing wireless LAN communication and LTE communication. The flowchart of FIG. 2 is realized by each functional module shown in FIG. When the functional module is software, the CPU configuring the control unit 21 described later is realized by executing the program.

First, in S201, the wireless LAN communication frequency detection unit 501 detects the communication frequency of the wireless LAN communication unit 11. Then, the interference avoidance control unit 504 acquires the current wireless LAN communication frequency based on the detection content of the wireless LAN communication frequency detection unit 501.
In S202, the LTE communication frequency detection unit 502 detects the communication frequency of the LTE communication unit 13. Then, the interference avoidance control unit 504 acquires the current LTE communication frequency based on the detection content of the LTE communication frequency detection unit 502.
In step S203, the interference avoidance control unit 504 obtains the difference between the wireless LAN communication frequency acquired in step S201 and the LTE communication frequency acquired in step S202, and determines whether the difference is 20 MHz or less (predetermined value or less). 20 MHz is an example of a threshold (predetermined value) for determining whether interference will occur such that communication can not be performed when wireless LAN communication and LTE communication are simultaneously performed. The threshold used in S203 is not limited to 20 MHz, and may differ depending on the desired degree of interference avoidance, or may differ according to the operating frequency band or communication speed of the wireless communication apparatus 10.

If the difference between the wireless LAN communication frequency and the LTE communication frequency is less than or equal to 20 MHz (the determination result in S203 is Yes), the process proceeds to S204. If the determination result in S203 is No, the interference avoidance control unit 504 determines that there is no interference that prevents communication, since the difference between the communication frequency for wireless LAN communication and the communication frequency for LTE communication is large, and the flow is finish.
In S204, the duplex method detection unit 503 detects a duplex method of LTE communication. Then, the interference avoidance control unit 504 acquires the duplex scheme of the current LTE communication based on the detection content of the duplex scheme detection unit 503.
In step S205, the interference avoidance control unit 504 determines whether the LTE duplex scheme acquired in step S204 is LTE-FDD (frequency division duplex). When the LTE duplex method acquired in S204 is LTE-FDD (the determination result in S205 is Yes), the process proceeds to S206.

In S206, the interference avoidance control unit 504 changes the channel (frequency band to be used) of the wireless LAN communication to avoid interference. For example, when the wireless communication device 10 is operating as an access point (hereinafter referred to as "AP"), the 2.4 GHz frequency band is changed to the 5 GHz frequency band.
If the determination result in S205 is No, the interference avoidance control unit 504 determines that the duplex scheme is LTE-TDD. When the determination result of S205 is No, it progresses to S207.
In step S207, the interference avoidance control unit 504 controls the wireless communication apparatus 10 to perform wireless LAN communication in a transmission time slot in which LTE transmission is not performed to avoid interference. That is, in the present embodiment, when the duplex scheme is LTE-TDD (time division duplex), interference is avoided without changing the frequency band used for wireless LAN communication. In the wireless LAN communication in this case, for example, RTS / CTS is used. RTS stands for Request To Send, and CTS stands for Clear To Send.

(Hardware configuration of wireless communication device)
FIG. 3 is a block diagram showing an example of the hardware configuration of the wireless communication device 10. As shown in FIG. The wireless communication device 10 includes a control unit 21, a wireless LAN control unit 22, a storage unit 23, an operation unit 24, an LTE control unit 25, a power supply unit 26, and a display unit 27. The components of the wireless communication device 10 are interconnected by a bus 28.
The control unit 21 controls the entire wireless communication device 10 by executing the input signal and the program stored in the storage unit 23. The control unit 21 includes, for example, one or more CPUs or MPUs. The functional modules shown in FIG. 1 are executed by the control unit 21.
The wireless LAN control unit 22 controls wireless LAN communication performed via the wireless LAN antenna 12. The wireless LAN control unit 22 corresponds to the wireless LAN communication unit 11 in FIG. 1 and may be referred to as a wireless LAN communication unit. Further, the wireless LAN control unit 22 may be an external device attached by USB or the like.

The storage unit 23 stores various information such as a program executed by the control unit 21, wireless communication network information, and communication parameters. Each step (process) of the flowchart of FIG. 2 is performed by the control unit 21 executing a program stored in the storage unit 23. The storage unit 23 is configured of, for example, a storage medium such as a ROM, a RAM, an HDD, a flash memory, or a removable SD card.
The operation unit 24 accepts an operation from the user. The operation unit 24 includes, for example, a keyboard and a touch panel.
The LTE control unit 25 controls LTE communication performed via the LTE antenna 14. The LTE control unit 25 corresponds to the LTE communication unit 13 in FIG. 1 and may be referred to as an LTE communication unit. Further, the LTE control unit 25 may be an external device attached to the wireless communication apparatus 10 by USB or the like.

The power supply unit 26 supplies power to each component of the wireless communication device 10. The power supply unit 26 can supply power only to specific components. The power supply unit 26 performs, for example, processing (power saving mode transition processing) of supplying power only to the LTE control unit 25 and not supplying power to the other components.
The display unit 27 has a function of outputting at least one of visual display and sound display. The display unit 27 includes, for example, a liquid crystal panel, an LED, and a speaker, and performs various types of display and audio output under the control of the control unit 21.
The wireless communication device 10 is, for example, a device such as a mobile phone, a smartphone, a tablet terminal, or a camera, but is not limited to these devices as long as the device has the above-described functional module and hardware configuration.

(Effect of Embodiment 1)
As described above, in the present embodiment, when the duplex method of LTE communication is LTE-FDD, interference with wireless LAN communication is avoided by changing the frequency band used in wireless LAN communication. Moreover, when the duplex method of LTE communication is LTE-TDD, wireless LAN communication is performed in a transmission time slot in which LTE transmission is not performed to avoid interference. That is, in the present embodiment, it is possible to take an appropriate interference avoidance measure based on the duplex system (LTE-FDD or LTE-TDD) of LTE communication. For example, when it is unclear whether a frequency band around 2500 MHz is allocated for FDD or TDD, in this embodiment, a duplex system is detected, and interference avoidance is performed based on the duplex system. Determine (select) a plan. Therefore, appropriate measures for avoiding interference can be taken.

Moreover, if the interference avoidance control of this embodiment is performed, the influence on the wireless LAN communication is reduced as compared with the interference avoidance control of changing the frequency band in any case. In the present embodiment, when the interference can be avoided without changing the communication frequency (S205: No), the interference is avoided without changing the communication frequency of the wireless LAN (S207).
Furthermore, according to the present embodiment, interference between LTE communication and wireless LAN communication can be avoided without providing a special interference detection unit (for example, a unit that detects the timing at which an interference wave is generated).

Embodiment 2
Next, a wireless communication apparatus according to Embodiment 2 of the present invention will be described. The configuration of functional modules involved in wireless communication of the wireless communication apparatus of the second embodiment is the same as that of the first embodiment (FIG. 1). In the following description, the same reference numerals are used for the same components as in the first embodiment, and the detailed description is omitted.
In the first embodiment, it is assumed that the wireless communication device 10 is simultaneously performing the wireless LAN communication and the LTE communication (that is, the wireless communication device 10 is in data communication). Determine if it is medium. Furthermore, when the wireless communication device 10 is in data communication, it is also determined whether or not LTE communication can be offloaded to wireless LAN communication. Then, when the offload is not possible, the interference avoidance control described in the first embodiment is performed.

The operation of the communication control unit 15 in the wireless communication device 10 of the second embodiment will be described with reference to FIG. The flowchart of FIG. 4 is realized by each functional module shown in FIG. When the functional module is software, the CPU configuring the control unit 21 is realized by executing the program.
First, in step S301, the interference avoidance control unit 504 determines whether the wireless communication device 10 is currently in data communication, based on the operating conditions of the wireless LAN communication unit 11 and the LTE communication unit 13.
If the wireless communication device 10 is currently in data communication (Yes in S301), the process proceeds to S302. If the determination result in S301 is No, the wireless communication device 10 is not currently in data communication, so the interference avoidance control unit 504 determines that it is not necessary to take an interference avoidance measure, and ends the flow.

In S302, the interference avoidance control unit 504 determines whether offload of data communication from the LTE to the wireless LAN is possible. When offloading of data communication from LTE to the wireless LAN is possible (the determination result in S302 is Yes), the LTE communication can be offloaded to wireless LAN communication, and therefore the interference avoidance control unit 504 does not need to take an interference avoidance measure. Judge, and end the flow. The case where LTE communication can be offloaded to wireless LAN communication is, for example, the case where the LTE communication unit 13 is only performing data communication. The case where the wireless LAN communication can not be offloaded is, for example, the case where the LTE communication unit 13 is used for a voice call.
When the determination result of S302 is No, it progresses to S201. Steps S201 to S207 are the same as in the first embodiment (FIG. 2). In addition, it can be said that the determination of S302 determines whether communication by LTE communication can be substituted by communication by wireless LAN communication.

(Effect of Embodiment 2)
In the present embodiment, first, it is determined whether the wireless communication device 10 is in data communication. If it is determined that it is not necessary to take an interference avoidance measure (S301: No), no interference avoidance measure is taken. Therefore, it is possible to prevent the execution of unnecessary interference avoidance measures (interference avoidance control control). Further, since the interference avoidance measure is not taken even when the LTE communication can be offloaded to the wireless LAN communication (S302: Yes), it is possible to prevent the use of the unnecessary interference avoidance measure. That is, when LTE communication can be replaced by wireless LAN communication, the interference avoidance measures in S206 and S207 are not taken. Therefore, interference avoidance control can be performed efficiently.
Further, in the present embodiment, since the control of S201 to S207 is performed similarly to the first embodiment, the same effect as the first embodiment can be obtained. That is, it is possible to take appropriate interference avoidance measures based on LTE duplexing scheme (LTE-FDD or LTE-TDD). Further, when the interference avoidance measure of the present embodiment is adopted, the influence on the wireless LAN communication is reduced as compared with the interference avoidance measure of changing the frequency band in any case.

Embodiment 3
Next, a wireless communication apparatus according to Embodiment 3 of the present invention will be described.
In the first embodiment, when the duplex method is LTE-FDD, the wireless LAN channel is immediately changed. However, in the third embodiment, when the duplex method is LTE-FDD, it is possible to avoid interference without changing the wireless LAN channel. judge. Then, if interference can be avoided without changing the wireless LAN channel, the interference avoiding measure is taken, and otherwise the wireless LAN channel is changed.
FIG. 5 shows the configuration of functional modules involved in wireless communication of the wireless communication device 40 according to the third embodiment. The wireless communication apparatus 40 of this embodiment is different from the first embodiment in that the communication control unit 15 further includes a wireless LAN intermittent reception cycle detection unit 505 and an LTE intermittent reception cycle detection unit 506. The operation of the interference avoidance control unit 504 is also different from that of the first embodiment. As in the first embodiment, the wireless LAN intermittent reception cycle detection unit 505 and the LTE intermittent reception cycle detection unit 506 in the present embodiment are also realized by software or hardware.

In the following description, the same reference numerals are used for the same components as in the first embodiment, and the detailed description is omitted.
The wireless LAN intermittent reception cycle detection unit 505 detects an intermittent reception cycle of the wireless LAN. The LTE intermittent reception cycle detection unit 506 detects an LTE intermittent reception cycle. The intermittent reception is to set the power saving state when there is no information to be communicated for the power saving of the wireless communication unit (the wireless LAN communication unit 11 and the LTE communication unit 13). The intermittent reception cycle is an interval (cycle) at which the presence or absence of information to be communicated periodically is confirmed. The intermittent reception cycle of the wireless LAN is, for example, a beacon cycle. The intermittent reception period of LTE is called a DRX (Discontinuous Reception or Discontinuous RX) period.
The configuration other than the above is the same as the configuration of the first embodiment (FIG. 1).
The operation of the communication control unit 15 in the wireless communication device 40 will be described using FIG. The flowchart of FIG. 6 is realized by each functional module shown in FIG. When the functional module is software, the CPU configuring the control unit 21 is realized by executing the program.

Steps S201 to S205 are the same as in the first embodiment.
When the determination result of S205 is Yes, it progresses to S501. When the determination result of S205 is No, it progresses to S207. In S207, as described in the first embodiment, under the control of the interference avoidance control unit 504, the wireless communication apparatus 40 performs wireless LAN communication in a transmission time slot in which LTE transmission is not performed to avoid interference.
In S501, the interference avoidance control unit 504 determines whether or not the LTE intermittent reception cycle can be changed. If the LTE intermittent reception cycle can be changed (the determination result in S501 is Yes), the process proceeds to S502. When the determination result of S501 is No, it progresses to S206. In S206, as described in the first embodiment, the interference avoidance control unit 504 changes the channel of the wireless LAN communication to avoid interference. It is assumed that, at the time of executing the process of S501, the current LTE intermittent reception cycle is acquired by the interference avoidance control unit 504.

In step S502, the wireless LAN intermittent reception cycle detection unit 505 detects the current intermittent reception cycle of wireless LAN communication. Then, the interference avoidance control unit 504 acquires the current intermittent reception cycle of the wireless LAN communication based on the detection content of the wireless LAN intermittent reception cycle detection unit 505.
In step S503, the interference avoidance control unit 504 matches the intermittent reception cycle of LTE communication with the intermittent reception cycle of wireless LAN communication (FIG. 7). If the intermittent reception cycle of LTE and the wireless LAN matches, if it is known that there is no LTE data (reception data) addressed to the wireless communication apparatus 40 in a certain LTE intermittent reception cycle, during the same wireless LAN intermittent reception cycle There is no interference with the reception of LTE even if wireless LAN communication is performed.
Using this, in S504 following S503, wireless LAN communication is performed in an LTE intermittent reception cycle in which there is no LTE data addressed to the wireless communication device 40.

(Effect of Embodiment 3)
According to the present embodiment, when the duplex method is LTE-FDD (S205: Yes) and the LTE intermittent reception cycle can be changed (S501: Yes), the LTE intermittent reception cycle is set to the wireless LAN It is matched with the intermittent reception cycle (S 503). Then, wireless LAN communication is performed in an LTE intermittent reception cycle in which there is no LTE data addressed to the wireless communication device 40 (S504). Therefore, it is possible to take an appropriate measure for avoiding interference according to whether or not the intermittent reception cycle of LTE is changed. That is, even if the duplex method is LTE-FDD, it is determined whether it is possible to adopt an interference avoidance measure that does not immediately change the channel of the wireless LAN and does not change the channel of the wireless LAN (S501). Then, if it is possible to take an interference avoidance measure that does not change the channel of the wireless LAN, the interference avoidance measure is taken (S503, S504). Therefore, compared to the first embodiment, the influence on wireless LAN communication is small.

Further, in the present embodiment as well, since the control of S201 to S207 is performed in the same manner as in the first embodiment, the same effect as in the first embodiment can be obtained.
Therefore, according to the present embodiment, it is possible to take an appropriate measure for avoiding interference according to whether or not the duplexing scheme of LTE and the intermittent reception cycle of LTE are changeable.
In S503, the intermittent reception cycle of LTE is made to coincide with the intermittent reception cycle of the wireless LAN, but the present embodiment is not limited to this. For example, if the intermittent reception cycle of LTE is set to a positive integer multiple of the intermittent reception cycle of the wireless LAN, the same effect as the above-described effect can be obtained.

Embodiment 4
Next, a wireless communication apparatus according to Embodiment 4 of the present invention will be described. The configuration of functional modules related to wireless communication of the wireless communication apparatus according to the fourth embodiment is the same as the configuration of the third embodiment shown in FIG. In the following description, the same reference numerals are used for the same configuration as that of the third embodiment, and the detailed description is omitted.
In the third embodiment, when the duplex method is LTE-FDD, it is determined whether or not the LTE intermittent reception cycle can be changed, and when the LTE intermittent reception cycle can be changed, interference avoidance is performed without changing the wireless LAN channel. went. In the fourth embodiment, when the duplex method is LTE-FDD, it is determined whether the wireless communication apparatus is operating as an AP, and when operating as an AP, interference avoidance is performed without changing the wireless LAN channel. Do. When the wireless communication apparatus is operating as an AP, the wireless LAN communication unit 11 of the wireless communication apparatus is operating in the master station mode.

The operation of the communication control unit 15 in the wireless communication device 40 of the present embodiment will be described using FIG. The flowchart of FIG. 8 is realized by each functional module shown in FIG. When the functional module is software, the CPU configuring the control unit 21 is realized by executing the program.
Steps S201 to S205 are the same as in the third embodiment. When the duplex method is LTE-FDD in S205 (the determination result in S205 is Yes), the process proceeds to S701. When the determination result of S205 is No, it progresses to S207.
In step S701, the interference avoidance control unit 504 determines whether the wireless LAN communication unit 11 is operating as an AP. If the wireless LAN communication unit 11 is operating as an AP (the determination result in S701 is Yes), the process proceeds to S702. When the determination result of S701 is No, it progresses to S206. It is assumed that the current wireless LAN intermittent reception cycle is acquired by the interference avoidance control unit 504 at the time of executing the process of S701.

In S702, the LTE intermittent reception cycle detection unit 506 detects the current intermittent reception cycle of LTE communication. Then, the interference avoidance control unit 504 obtains the intermittent reception cycle of the current LTE communication based on the detection content of the LTE intermittent reception cycle detection unit 506.
In S703, the interference avoidance control unit 504 matches the intermittent reception cycle of the wireless LAN with one half of the intermittent reception cycle of LTE (FIG. 9). If the intermittent reception cycle of the wireless LAN matches one half of the intermittent reception cycle of LTE, if it is known that there is no LTE data addressed to the wireless communication apparatus 40 in a certain LTE intermittent reception cycle, communication of the wireless LAN is performed. If done, there will be no interference with LTE reception. That is, even if there is a processing delay, interference with the reception of LTE does not occur even if communication of the wireless LAN is performed during the wireless LAN intermittent reception cycle in the LTE intermittent reception cycle.
Using this, in S704 following S703, wireless LAN communication is performed in an LTE intermittent reception cycle in which there is no LTE data addressed to the wireless communication device 40.

(Effect of Embodiment 4)
According to the present embodiment, when the wireless LAN communication unit 11 is operating as an AP (S701: Yes), the intermittent reception cycle of the wireless LAN is made to coincide with 1/2 of the intermittent reception cycle of LTE (S703). Then, wireless LAN communication is performed in an LTE intermittent reception cycle in which there is no LTE data addressed to the wireless communication device 40 (S704). Therefore, in accordance with the operation mode of the wireless LAN communication unit 11 (the state of operating in the master station mode), it is possible to take an appropriate measure for avoiding interference. In this embodiment, even if the duplex method is LTE-FDD, it is determined whether an interference avoidance measure can be taken without changing the channel of the wireless LAN without immediately changing the channel of the wireless LAN (S701). Then, if it is possible to take an interference avoidance measure that does not change the channel of the wireless LAN, the interference avoidance measure is taken (S703, S704). Therefore, compared to the first embodiment, the influence on wireless LAN communication is small.

Further, in the present embodiment as well, since the control of S201 to S207 is performed in the same manner as in the first embodiment, the same effect as in the first embodiment can be obtained.
Therefore, according to the present embodiment, it is possible to take an appropriate measure for avoiding interference according to the duplex method of LTE and the operation of the wireless LAN communication unit 11.
In S703, the intermittent reception cycle of the wireless LAN is made to coincide with 1/2 of the intermittent reception cycle of LTE, but the present embodiment is not limited to this. For example, if the intermittent reception cycle of the wireless LAN is a positive integer fraction of the intermittent reception cycle of LTE (for example, 1/3), the same effect as the above-described effect can be obtained.

Embodiment 5
Next, a wireless communication apparatus according to Embodiment 5 of the present invention will be described. The configuration of functional modules involved in wireless communication of the wireless communication apparatus according to the fifth embodiment is the same as that of the third embodiment (FIG. 5). In the following description, the same reference numerals are used for the same configuration as that of the third embodiment, and the detailed description is omitted.
In the third embodiment, when the duplex method is LTE-FDD, it is determined whether or not the LTE intermittent reception cycle can be changed, and when the LTE intermittent reception cycle can be changed, interference avoidance is performed without changing the wireless LAN channel. went. In the fifth embodiment, when the duplex method is LTE-FDD, it is determined whether the wireless communication apparatus is operating as a station (hereinafter referred to as “STA”), and when operating as an STA Avoid interference without changing the LAN channel. When the wireless communication apparatus operates as a STA, the wireless LAN communication unit 11 of the wireless communication apparatus operates in the slave station mode.

The operation of the communication control unit 15 in the wireless communication apparatus 40 of the fifth embodiment will be described using FIG. The flowchart of FIG. 10 is realized by each functional module shown in FIG. When the functional module is software, the CPU configuring the control unit 21 is realized by executing the program.
The operations from S201 to S205 are the same as in the third embodiment. When the determination result of S205 is Yes, it progresses to S901. When the determination result of S205 is No, it progresses to S207.
In step S901, it is determined whether the wireless LAN communication unit 11 is operating as a STA. If the determination result in S901 is Yes, the process proceeds to S902. When the determination result of S901 is No, it progresses to S206.
In step S902, the interference avoidance control unit 504 places the wireless LAN communication unit 11 in the power saving mode.

In step S903, the interference avoidance control unit 504 determines whether to receive LTE data in the current LTE intermittent reception cycle. If the determination result of S903 is Yes, the determination of S903 is performed again. In this case, since reception of LTE data is scheduled during the current intermittent reception cycle, wireless LAN communication is suppressed. That is, the wireless LAN communication unit 11 is maintained in the power saving mode.
If the determination result in S903 is No, reception of LTE data is not scheduled during the current intermittent reception cycle, and therefore wireless LAN communication can be performed without causing interference. At this time, the wireless LAN communication unit 11 is switched from the power saving mode to the communication mode by transmitting the PS-Poll packet defined in the wireless LAN standard, and wireless LAN communication is performed.

(Effect of Embodiment 5)
According to the present embodiment, when the wireless LAN communication unit 11 is operating as the STA (S901: Yes), if reception of LTE data is scheduled (S903: Yes), the wireless LAN communication unit 11 is used. Keep in power saving mode. If reception of LTE data is not scheduled, the wireless LAN communication unit 11 is set to the normal mode (communication mode) to perform wireless LAN communication. Therefore, it is possible to take an appropriate measure against interference according to the operation mode of the wireless LAN communication unit 11 (the state of operating in the slave station mode). In this embodiment, even if the duplex method is LTE-FDD, it is determined whether an interference avoidance measure can be taken without changing the channel of the wireless LAN without immediately changing the channel of the wireless LAN (S901). Then, if it is possible to take an interference avoidance measure that does not change the channel of the wireless LAN, the interference avoidance measure is taken (S902 to S904). Therefore, compared to the first embodiment, the influence on wireless LAN communication is small.

Further, in the present embodiment as well, since the control of S201 to S207 is performed in the same manner as in the first embodiment, the same effect as in the first embodiment can be obtained.
Therefore, according to the present embodiment, it is possible to take an appropriate measure for avoiding interference according to the duplex method of LTE and the operation of the wireless LAN communication unit 11.
Although the PS-Poll packet is transmitted in S904, the present invention is not limited to this. Even if an Awake packet defined by the wireless LAN standard is transmitted, the same effect as described above can be achieved. The communication mode may be called active mode.

(Modification)
In the embodiment described above, S202 is performed after S201, but S202 may be performed before S201.
In the above embodiment, the communication device capable of communicating by two different wireless communication methods (wireless LAN communication and LTE communication) has been described, but the present invention is not limited to such a communication device, and three or more different ones are different. The present invention can also be applied to a communication apparatus that can communicate by a wireless communication method. That is, the present invention can be applied to a communication apparatus that can communicate with a plurality of (two or more) different wireless communication systems.
Furthermore, although the above-mentioned embodiment explained the communications device which can communicate by LTE communications, the present invention is not limited to such a communications device. The LTE communication is an example of communication using the duplex system, and the present invention can be applied to any communication apparatus that can perform communication by the duplex system other than the LTE communication. For example, the present invention can be applied not only to communication devices that perform communication for telephones, but also to communication devices that perform high-speed data communication. Also, LTE communication is an example of mobile communication, and the present invention can be applied to communication apparatuses that perform mobile communication other than LTE communication. Moreover, not only wireless LAN communication conforming to the IEEE 802.11 standard, but also other wireless communication such as Bluetooth (registered trademark) may be used.

(Other embodiments)
Although the wireless communication devices 10 and 40 have been described in the above embodiments, the present invention can be embodied (implemented) in other forms. For example, the present invention supplies a program (computer program) for realizing one or more functions of the above-described embodiments to a system or apparatus via a network or a recording medium (storage medium), and a computer of the system or apparatus It is also possible to realize by one or more processors in the program reading and executing a program. In this case, the program (program code) itself read from the recording medium implements the functions of the embodiment. Moreover, the recording medium which recorded the said program can comprise this invention.

  Further, by executing the program read by the computer, not only the functions of the embodiment are realized, but also an operating system (OS) or the like operating on the computer based on an instruction of the program. The functions of the above-described embodiments may be realized by performing part or all of the processing.

  DESCRIPTION OF SYMBOLS 10 Wireless LAN communication part, 11 Wireless LAN communication part, 13 ... LTE communication part, 15 ... Communication control part, 501 ... Wireless LAN communication frequency detection part, 502 ... LTE communication frequency detection part, 503 ... Duplex system detection part , 504 ... interference avoidance control unit

Claims (14)

A control device of a wireless communication apparatus capable of communicating with a first wireless communication method and a second wireless communication method, the control device comprising:
Determining means for determining whether a difference between a frequency used in the communication of the first wireless communication method and a frequency used in the communication of the second wireless communication method is equal to or less than a predetermined value;
Detection means for detecting a duplex system used in the first wireless communication system;
When the determination means determines that the difference between the two frequencies is equal to or less than the predetermined value, communication based on the first wireless communication method and the second method based on the duplex method detected by the detection means Control means for performing control to avoid interference with communication by a wireless communication system;
A control device comprising:  When the duplex system is time division duplex, the control means performs communication of the second wireless communication mode by using time-divided time slots in the first wireless communication mode. The control device according to claim 1, wherein the interference is avoided.  When the duplex system is frequency division duplex, the control means avoids the interference by changing the frequency used in the communication of the second wireless communication system. The control device according to 2.  The communication control method according to any one of claims 1 to 3, wherein, when communication according to the first wireless communication method can be replaced by communication according to the second wireless communication method, the control means does not perform control for avoiding the interference. The control device according to item 1.  When the communication by the first wireless communication method can be substituted by the communication by the second wireless communication method, the case where the communication by the first wireless communication method can be offloaded to the communication by the second wireless communication method The control device according to claim 4, characterized in that:  The control device according to any one of claims 1 to 5, wherein the control means does not perform control for avoiding the interference if the wireless communication device does not perform communication.  The control means sets the intermittent reception cycle of the first wireless communication system to a positive integer multiple of the intermittent reception cycle of the second wireless communication system, and performs the intermittent reception cycle of the first wireless communication system. The control device according to any one of claims 1 to 6, wherein communication according to the second wireless communication method is performed when there is no received data.  The control means performs control to avoid the interference depending on whether the operation mode of the communication unit of the second wireless communication system is a master station mode or a slave station mode. The control apparatus of any one of -7.   When the operation mode of the communication unit of the second wireless communication method is a parent station mode, the control means determines the intermittent reception period of the second wireless communication method as the intermittent reception period of the first wireless communication method. The communication according to the second wireless communication method is performed when there is no received data in the intermittent reception cycle of the first wireless communication method, by making it a fraction of a positive integer. Control device.  The operation mode of the communication unit of the second wireless communication method is a slave station mode, and the communication unit of the second wireless communication method is a power saving mode, and the first wireless communication method When there is no received data in the intermittent reception cycle of the second wireless communication mode, the control means shifts the communication unit of the second wireless communication mode from the power saving mode to the communication mode, and performs communication of the second wireless communication mode. The control device according to claim 8, characterized in that:   The control device according to any one of claims 1 to 10, wherein communication according to the first wireless communication method is mobile communication, and communication according to the second wireless communication method is wireless LAN communication. . A wireless communication apparatus capable of communicating by a first wireless communication method and a second wireless communication method,
A first communication unit for performing communication according to the first wireless communication method;
A second communication unit that performs communication in the second wireless communication method;
The control device according to any one of claims 1 to 11.
A wireless communication device comprising: A control method of a wireless communication apparatus capable of communicating with a first wireless communication method and a second wireless communication method,
Determining whether a difference between a frequency used in the communication of the first wireless communication system and a frequency used in the communication of the second wireless communication system is equal to or less than a predetermined value;
Detecting a duplex scheme used in the first wireless communication scheme;
When it is determined that the difference between the two frequencies is equal to or less than the predetermined value, communication by the first wireless communication system and communication by the second wireless communication system are performed based on the detected duplex system. Performing control to avoid interference of
A control method characterized by comprising: The computer program for functioning the said computer as each means of the control apparatus of any one of Claims 1-11 by reading execution of a computer.

Images