WO2021229805A1 - Radio communication method, and radio communication system - Google Patents

Radio communication method, and radio communication system Download PDF

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Publication number
WO2021229805A1
WO2021229805A1 PCT/JP2020/019476 JP2020019476W WO2021229805A1 WO 2021229805 A1 WO2021229805 A1 WO 2021229805A1 JP 2020019476 W JP2020019476 W JP 2020019476W WO 2021229805 A1 WO2021229805 A1 WO 2021229805A1
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Prior art keywords
wireless communication
communication device
unit
signal
measurement signal
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PCT/JP2020/019476
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French (fr)
Japanese (ja)
Inventor
陸 大宮
友規 村上
智明 小川
泰司 鷹取
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日本電信電話株式会社
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Priority to PCT/JP2020/019476 priority Critical patent/WO2021229805A1/en
Priority to JP2022522480A priority patent/JP7371772B2/en
Publication of WO2021229805A1 publication Critical patent/WO2021229805A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/08—Closed loop power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/16—Deriving transmission power values from another channel

Definitions

  • the present invention relates to a wireless communication method and a wireless communication system.
  • Non-Patent Document 1 a frequency sharing technique in which a spatiotemporally free frequency is dynamically and secondarily used to increase the radio capacity (for example, Non-Patent Document 1). reference).
  • a plurality of wireless stations repeatedly use radio waves of the same frequency in different spaces. More specifically, by increasing the directivity of the antenna or providing geographical separation for each radio station, the desired received power and the interfering received power are separated (with a margin for reception). ) Is possible.
  • the radio station that uses the frequency secondarily does not interfere with the primary user station of the frequency.
  • a radio station that uses a frequency secondarily has a frequency that is lower than a predetermined value to secure a margin for interference, or limits the output of radio waves. Use next.
  • the interfered station when the frequency was used secondarily, the influence of the interference received by the primary user station (hereinafter referred to as the interfered station) was information that could not be known from the secondary user station (hereinafter referred to as the interfering station). .. Therefore, in order to prevent unintended harmful interference, the interfering station needs to secure an unnecessarily large separation distance (margin) from the interfered station. As a result, the interfering station has a problem that the available frequency space-time is reduced.
  • An object of the present invention is to provide a wireless communication method and a wireless communication system that can easily reduce the interference that a radio wave signal gives to another wireless communication device.
  • a third wireless communication device that emits a radio wave that can be an interference wave is emitted by a second wireless communication device provided in the first wireless communication device that can be affected by the interference wave.
  • the wireless communication system includes a first wireless communication device that can be affected by an interference wave, a second wireless communication device provided in the first wireless communication device, and a radio wave that can be an interference wave.
  • the second wireless communication device includes a third wireless communication device that emits the light, and the second wireless communication device transmits reception level information indicating the reception level of the measurement signal emitted by the third wireless communication device to the third wireless communication device.
  • the third wireless communication device is characterized in that the level of a signal transmitted to the first wireless communication device is set based on the reception level information.
  • frequency sharing techniques that spatially and frequently reuse the same radio frequency may be used to accommodate the increasing radio traffic.
  • an interfered radio device that receives radio wave interference measures the interference wave received power, and depending on whether or not the desired desired wave interference wave power ratio is satisfied, the same radio frequency is spatially used as much as possible. A method of reusing it frequently is conceivable.
  • the interfered radio device cannot measure the received power of the interfering wave separately while receiving the desired wave. Further, even if the interfered radio device can measure the interference wave reception power, the measured value of the interference wave reception power cannot generally be notified to the interfering radio device (interfering station). This is because it is usually not possible to establish a communication link between the interfering radio device and the interfering radio device.
  • the wireless communication system described below with reference to the drawings is configured to enable easy reduction of interference caused by radio signals to other wireless communication devices.
  • FIG. 1 is a diagram illustrating an outline of a wireless communication system 1 according to an embodiment.
  • the wireless communication system 1 includes, for example, a first wireless communication device 10 as an interfering station, a second wireless communication device 20 as a proxy reporting station, and a third wireless communication device 30 as an interfering station. And have.
  • the first wireless communication device 10, the second wireless communication device 20, and the third wireless communication device 30 may be mobile wireless communication devices.
  • the first wireless communication device 10 mutually wirelessly communicates with the third wireless communication device 30.
  • the second wireless communication device 20 is a wireless communication device having a simple configuration that receives and responds to a measurement signal (described later) transmitted by the third wireless communication device 30, for example, the first wireless communication device via a fixing member 150. It is installed at 10.
  • the second wireless communication device 20 has a function as a sensor that detects the measurement signal transmitted by the third wireless communication device 30 at substantially the same position as the first wireless communication device 10.
  • the second wireless communication device 20 may be used with the first wireless communication device 10 if the interference received by the first wireless communication device 10 from the third wireless communication device 30 can be measured on behalf of the first wireless communication device 10. May move independently.
  • the first wireless communication device 10 has an antenna 100, a wireless communication unit 102, and a signal processing unit 104.
  • the antenna 100 is used by the first wireless communication device 10 to send and receive radio signals to and from the third wireless communication device 30.
  • the wireless communication unit 102 transmits a signal (for example, a data signal) processed by the signal processing unit 104 to the third wireless communication device 30 via the antenna 100. Further, the wireless communication unit 102 receives a signal (for example, a data signal) transmitted from the third wireless communication device 30 via the antenna 100.
  • the second wireless communication device 20 has an antenna 200, a wireless communication unit 202, a measurement unit 204, a determination unit 206, and a response signal generation unit 208, and wirelessly communicates with the third wireless communication device 30.
  • the antenna 200 is used by the second wireless communication device 20 to transmit and receive radio signals to and from the third wireless communication device 30.
  • the antenna 200 also receives, for example, a radio signal transmitted by the first wireless communication device 10 to the third wireless communication device 30.
  • the wireless communication unit 202 receives the measurement signal transmitted by the third wireless communication device 30 via the antenna 200 and outputs the measurement signal to the measurement unit 204.
  • the measurement signal transmitted by the third wireless communication device 30 is received by the first wireless communication device 10 when the first wireless communication device 10 is an interfering station and the third wireless communication device 30 is an interfering station. This is a signal received by the second wireless communication device 20 as a proxy for measuring the interference of radio waves.
  • the wireless communication unit 202 receives the signal transmitted by the first wireless communication device 10 to the third wireless communication device 30 via the antenna 200, and outputs the signal to the determination unit 206. Further, the wireless communication unit 202 transmits the response signal (described later) generated by the response signal generation unit 208 to the third wireless communication device 30 via the wireless communication unit 202.
  • the measurement unit 204 measures the power (signal level) of the measurement signal received by the wireless communication unit 202, and outputs the measurement result to the determination unit 206.
  • the determination unit 206 determines whether or not there is a radio signal transmitted by the first wireless communication device 10 to the third wireless communication device 30. Then, the determination unit 206 outputs the measurement result input from the measurement unit 204 to the response signal generation unit 208 when the first wireless communication device 10 is not transmitting the radio wave signal.
  • the response signal generation unit 208 When the measurement result of the measurement unit 204 is input from the determination unit 206, the response signal generation unit 208 generates, for example, a response signal (reception level information) indicating the reception level of the measurement signal described above, and wirelessly generates the generated response signal. Output to the communication unit 202.
  • a response signal reception level information
  • the third wireless communication device 30 includes an antenna 300, a wireless communication unit 302, a signal processing unit 304, a measurement signal generation unit 306, a determination unit 308, a measurement unit 310, an estimation unit 312, and a setting unit 314. Wireless communication is performed with each other between the communication device 10 and the second wireless communication device 20.
  • the antenna 300 is used by the third wireless communication device 30 for transmitting and receiving radio signals between the first wireless communication device 10 and the second wireless communication device 20.
  • the wireless communication unit 302 transmits a signal (for example, a data signal) processed by the signal processing unit 304 to the first wireless communication device 10 via the antenna 300. Further, the wireless communication unit 302 transmits the measurement signal generated by the measurement signal generation unit 306 to the second wireless communication device 20 via the antenna 300.
  • the wireless communication unit 302 transmits the signal with the output power corresponding to the signal input from the signal processing unit 304 or the measurement signal generation unit 306.
  • the wireless communication unit 302 receives the radio wave signal transmitted by the first wireless communication device 10 and the response signal transmitted by the second wireless communication device 20 via the antenna 300, and receives the signal processing unit 304 and the determination unit 308. Output to.
  • the measurement signal generation unit 306 generates a measurement signal emitted from the third wireless communication device 30 while gradually changing it from, for example, a low power measurement signal to a high power measurement signal, based on the setting by the setting unit 314 described later. Then, it is output to the wireless communication unit 302.
  • the determination unit 308 determines whether or not the signal input from the wireless communication unit 302 is a response signal transmitted by the second wireless communication device 20, and if it is determined to be a response signal, the determination unit 308 determines the response signal. Output to the measuring unit 310.
  • the determination unit 308 may determine whether or not the response signal has been received, and if it is determined that the response signal has been received, output the response signal to the measurement unit 310.
  • the measurement unit 310 measures the power (signal level) of the response signal input from the determination unit 308, and outputs the measurement result to the estimation unit 312.
  • the estimation unit 312 estimates the interference wave reception power in the first wireless communication device 10 based on the power of the response signal measured by the measurement unit 310, and outputs the estimation result to the setting unit 314.
  • the setting unit 314 sets the transmission power of the data signal emitted from the third wireless communication device 30 to the first wireless communication device 10 to, for example, the signal processing unit 304 based on the interference wave reception power estimated by the estimation unit 312. do.
  • the setting unit 314 emits data from the third wireless communication device 30 to the first wireless communication device 10 based on the output power value at which the interference wave reception power estimated by the estimation unit 312 is less than a predetermined value (threshold). Set the signal transmission power.
  • the setting unit 314 is set so that the measurement signal generated by the measurement signal generation unit 306 is generated while gradually changing from the low power measurement signal to the high power measurement signal.
  • the setting unit 314 sets the measurement signal generation unit 306 so as to generate the measurement signal with the maximum transmission power within the range in which the interference with the first wireless communication device 10 is suppressed to less than a predetermined value, for example.
  • the setting unit 314 sets the signal processing unit 304 so that only the data signal is transmitted at the transmission power (level).
  • the signal processing unit 304 transmits the data signal to the first wireless communication device 10 via the wireless communication unit 302 and the antenna 300 in accordance with the transmission power set by the setting unit 314.
  • FIG. 2 is a sequence diagram illustrating a sequence of communication performed by the third wireless communication device 30 and the second wireless communication device 20.
  • the third wireless communication device 30 transmits a measurement signal to the second wireless communication device 20 (S100).
  • the second wireless communication device 20 transmits a response signal to the third wireless communication device 30 (S102).
  • the third wireless communication device 30 inquires the second wireless communication device 20 of the signal strength in order to measure the interference wave with respect to the first wireless communication device 10
  • the second wireless communication device 1 is used.
  • the communication device 20 responds to the third wireless communication device 30 with the signal strength of the interference wave.
  • FIG. 3 is a flowchart showing a first operation example of the third wireless communication device 30. As shown in FIG. 3, the third wireless communication device 30 first transitions from the standby state to the state of emitting the measurement signal (S200).
  • the third wireless communication device 30 determines whether or not the response signal can be received by the determination unit 308 (S202), and if it can be received (S202: Yes), proceeds to the process of S204 and cannot receive the response signal. If (S202: No), the process ends.
  • the setting unit 314 determines whether or not the interference wave reception power (signal level) estimated by the estimation unit 312 based on the measurement result of the measurement unit 310 is less than a predetermined threshold value (S204). Then, the setting unit 314 proceeds to the process of S206 when the signal level is less than the predetermined threshold value (S204: Yes), and transmits the measurement signal when the signal level is not less than the predetermined threshold value (S204: No). Set to lower the output (S208).
  • the setting unit 314 determines whether or not the transmission output of the response signal based on the measurement signal is the maximum (S206). Then, the setting unit 314 makes a setting to increase the transmission output of the measurement signal when the transmission output of the response signal is not the maximum (S206: No) (S210), and when the transmission output of the response signal is the maximum. (S206: Yes) ends the process.
  • the setting unit 314 tells the signal processing unit 304 to transmit only the data signal with the same transmission power as the measurement signal of the transmission power that is the maximum within the range in which the interference with the first wireless communication device 10 is suppressed to less than a predetermined value.
  • FIG. 4 is a flowchart showing an operation example of the second wireless communication device 20.
  • the second wireless communication device 20 waits for the measurement signal transmitted from the third wireless communication device 30 (S300). Then, when the second wireless communication device 20 receives the measurement signal (S302: Yes), the process proceeds to the process of S304, and in other cases (S302: No), the process returns to the process of S300.
  • the measuring unit 204 measures the power (signal level) of the measurement signal received by the wireless communication unit 202.
  • the determination unit 206 determines whether or not the first wireless communication device 10 (interfered station) is emitting radio waves to the third wireless communication device 30 (whether or not there is a radio wave signal being transmitted). (S306). When the determination unit 206 determines that the interfered station is emitting radio waves (S306: Yes), the determination unit 206 continues the processing of S306. Further, when the determination unit 206 determines that the interfered station does not emit radio waves (S306: No), the determination unit 206 outputs the measurement result input from the measurement unit 204 to the response signal generation unit 208. Proceed to the process of S308.
  • the response signal generation unit 208 When the measurement result of the measurement unit 204 is input from the determination unit 206, the response signal generation unit 208 generates the signal level of the measurement signal as a response signal, and the response signal generated via the wireless communication unit 202 and the antenna 200. Is transmitted to the third wireless communication device 30, and the process returns to S300.
  • FIG. 5 is a flowchart showing a second operation example of the third wireless communication device 30.
  • the third wireless communication device 30 emits a measurement signal with, for example, 1 ⁇ 2 of the maximum power (S400).
  • the third wireless communication device 30 determines whether or not the measurement signal can be received by the determination unit 308 (S402), and if it cannot be received (S402: No), proceeds to the process of S404 and can receive the measurement signal. If (S402: Yes), the process proceeds to S408.
  • the setting unit 314 determines whether or not the measurement signal is the maximum output, and if it is not the maximum output (S404: No), proceeds to the processing of S406, and if it is the maximum output (S404). : Yes), the process proceeds to S408.
  • the setting unit 314 sets the measurement signal generation unit 306 to increase the output of the measurement signal, and the measurement signal generation unit 306 increases the output power via the wireless communication unit 302 and the antenna 300. Fire a measurement signal.
  • the setting unit 314 sets the increase in the output power of the measurement signal as shown in the following equation (1), for example.
  • the setting unit 314 determines whether or not the interference wave reception power (signal level) estimated by the estimation unit 312 based on the measurement result of the measurement unit 310 is less than a predetermined threshold value (S408).
  • the setting unit 314 makes a setting to lower the transmission output of the measurement signal when the signal level is not less than the predetermined threshold value (S408: No) (S410), and when the signal level is less than the predetermined threshold value (S408: Yes). Ends the process.
  • the setting unit 314 tells the signal processing unit 304 to transmit only the data signal with the same transmission power as the measurement signal of the transmission power that is the maximum within the range in which the interference with the first wireless communication device 10 is suppressed to less than a predetermined value. It will be set for this.
  • the second wireless communication device 20 transmits a response signal indicating the reception level of the measurement signal to the third wireless communication device 30, and the third wireless communication device 30 is the third based on the response signal. 1 Set the level of the signal transmitted to the wireless communication device 10. At this time, the first wireless communication device 10 does not need to have a function of measuring the interference wave and a function of transmitting information indicating the measured interference wave to the third wireless communication device 30.
  • the wireless communication system 1 makes it possible to easily reduce the interference that the radio wave signal emitted by the third wireless communication device 30 gives to the first wireless communication device 10.
  • Each function of the third wireless communication device 30 may be partially or wholly configured by hardware, or may be configured as a program executed by a processor such as a CPU.
  • the third wireless communication device 30 can be realized by using a computer and a program, and the program can be recorded on a storage medium or provided through a network.
  • FIG. 6 is a diagram showing a hardware configuration example of the third wireless communication device 30.
  • the third wireless communication device 30 has, for example, an input unit 50, an output unit 51, a communication unit 52, a CPU 53, a memory 54, and an HDD 55 connected via a bus 56, and has a function as a computer. Further, the third wireless communication device 30 is capable of inputting / outputting data to / from the storage medium 57.
  • the input unit 50 is, for example, a keyboard, a mouse, or the like.
  • the output unit 51 is a display device such as a display.
  • the communication unit 52 is, for example, a wireless network interface.
  • the CPU 53 controls each part constituting the third wireless communication device 30 and performs the above-mentioned processing.
  • the memory 54 and the HDD 55 store data, a wireless communication program, and the like. Therefore, the third wireless communication device 30 may be configured to perform processing using the information stored in the memory 54 and the HDD 55 in advance.
  • the storage medium 57 is made capable of storing a wireless communication program or the like that executes the function of the third wireless communication device 30.
  • the architecture constituting the third wireless communication device 30 is not limited to the example shown in FIG. Further, the first wireless communication device 10 and the second wireless communication device 20 may also have the same configuration as the third wireless communication device 30.

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

A radio communication method according to an embodiment of the present invention is characterized by including: a transmitting step of transmitting, to a third radio communication device which emits radio waves that may become interference waves, by means of a second radio communication device provided in a first radio communication device that may be affected by the interference waves, reception level information indicating the reception level of a measurement signal emitted by the third radio communication device; and a setting step of setting the level of a signal transmitted by the third radio communication device to the first radio communication device, on the basis of the reception level information. Further, the radio communication method according to the embodiment may include a measurement signal generating step of generating the measurement signal while gradually changing the same from low power to high power.

Description

無線通信方法及び無線通信システムWireless communication method and wireless communication system
　本発明は、無線通信方法及び無線通信システムに関する。 The present invention relates to a wireless communication method and a wireless communication system.
　近年、スマートフォンやタブレットをはじめとする無線端末の急速な普及に伴い、無線ネットワーク上のトラヒック量が急激に増大している。このような無線トラヒックを収容するために、時空間的に空いている周波数を動的かつ二次的に利用し、無線容量を増大させる周波数共用技術が知られている（例えば、非特許文献１参照）。 In recent years, with the rapid spread of wireless terminals such as smartphones and tablets, the amount of traffic on wireless networks has increased rapidly. In order to accommodate such a radio traffic, a frequency sharing technique is known in which a spatiotemporally free frequency is dynamically and secondarily used to increase the radio capacity (for example, Non-Patent Document 1). reference).
　例えば、複数の無線局（無線通信装置）は、異なる空間で同一周波数の電波を繰り返し利用する。より具体的には、各無線局に対し、アンテナの指向性を高めたり、地理的な離隔をもたせることにより、希望する受信電力と、干渉してくる受信電力とを隔てる（受信にマージンをもたせる）ことが可能となる。 For example, a plurality of wireless stations (wireless communication devices) repeatedly use radio waves of the same frequency in different spaces. More specifically, by increasing the directivity of the antenna or providing geographical separation for each radio station, the desired received power and the interfering received power are separated (with a margin for reception). ) Is possible.
　複数の無線局によって周波数を共用する場合、二次的に周波数を利用する無線局は、周波数の一次利用局に干渉を与えないことが大前提である。つまり、二次的に周波数を利用する無線局は、一次利用局からの距離を所定値以上にして干渉に対するマージンを確保したり、電波の出力を制限するなどの制約条件の下で周波数を二次利用する。 When the frequency is shared by multiple radio stations, it is a major premise that the radio station that uses the frequency secondarily does not interfere with the primary user station of the frequency. In other words, a radio station that uses a frequency secondarily has a frequency that is lower than a predetermined value to secure a margin for interference, or limits the output of radio waves. Use next.
　従来は、周波数を二次利用する場合、一次利用局（以下、被干渉局）が受けている干渉の影響は、二次利用局（以下、与干渉局）からは知り得ない情報であった。そのため、意図しない有害な干渉を防ぐように、与干渉局は、被干渉局から必要以上に大きな離隔距離（マージン）を確保する必要があった。結果として、与干渉局は、利用可能な周波数時空間が減少してしまうという問題があった。 In the past, when the frequency was used secondarily, the influence of the interference received by the primary user station (hereinafter referred to as the interfered station) was information that could not be known from the secondary user station (hereinafter referred to as the interfering station). .. Therefore, in order to prevent unintended harmful interference, the interfering station needs to secure an unnecessarily large separation distance (margin) from the interfered station. As a result, the interfering station has a problem that the available frequency space-time is reduced.
　本発明は、電波信号が他の無線通信装置に与える干渉を容易に低減することを可能にする無線通信方法及び無線通信システムを提供することを目的とする。 An object of the present invention is to provide a wireless communication method and a wireless communication system that can easily reduce the interference that a radio wave signal gives to another wireless communication device.
　本発明の一態様にかかる無線通信方法は、干渉波の影響を受け得る第１無線通信装置に設けられた第２無線通信装置によって、干渉波となり得る電波を発射する第３無線通信装置が発射した測定信号の受信レベルを示す受信レベル情報を前記第３無線通信装置へ送信する送信工程と、前記受信レベル情報に基づいて、前記第３無線通信装置が前記第１無線通信装置へ送信する信号のレベルを設定する設定工程とを含むことを特徴とする。 In the wireless communication method according to one aspect of the present invention, a third wireless communication device that emits a radio wave that can be an interference wave is emitted by a second wireless communication device provided in the first wireless communication device that can be affected by the interference wave. A transmission step of transmitting reception level information indicating the reception level of the measured signal to the third wireless communication device, and a signal transmitted by the third wireless communication device to the first wireless communication device based on the reception level information. It is characterized by including a setting process for setting the level of.
　また、本発明の一態様にかかる無線通信システムは、干渉波の影響を受け得る第１無線通信装置と、前記第１無線通信装置に設けられた第２無線通信装置と、干渉波となり得る電波を発射する第３無線通信装置とを備え、前記第２無線通信装置は、前記第３無線通信装置が発射した測定信号の受信レベルを示す受信レベル情報を前記第３無線通信装置へ送信し、前記第３無線通信装置は、前記受信レベル情報に基づいて、前記第１無線通信装置へ送信する信号のレベルを設定することを特徴とする。 Further, the wireless communication system according to one aspect of the present invention includes a first wireless communication device that can be affected by an interference wave, a second wireless communication device provided in the first wireless communication device, and a radio wave that can be an interference wave. The second wireless communication device includes a third wireless communication device that emits the light, and the second wireless communication device transmits reception level information indicating the reception level of the measurement signal emitted by the third wireless communication device to the third wireless communication device. The third wireless communication device is characterized in that the level of a signal transmitted to the first wireless communication device is set based on the reception level information.
　本発明によれば、電波信号が他の無線通信装置に与える干渉を容易に低減することを可能にする。 According to the present invention, it is possible to easily reduce the interference that a radio wave signal gives to other wireless communication devices.
一実施形態にかかる無線通信システムの概要を例示する図である。It is a figure which illustrates the outline of the wireless communication system which concerns on one Embodiment. 第３無線通信装置と第２無線通信装置とが行う通信のシーケンスを例示するシーケンス図である。It is a sequence diagram which illustrates the sequence of communication performed by the 3rd wireless communication apparatus and the 2nd wireless communication apparatus. 第３無線通信装置の第１動作例を示すフローチャートである。It is a flowchart which shows the 1st operation example of the 3rd wireless communication apparatus. 第２無線通信装置の動作例を示すフローチャートである。It is a flowchart which shows the operation example of the 2nd wireless communication apparatus. 第３無線通信装置の第２動作例を示すフローチャートである。It is a flowchart which shows the 2nd operation example of the 3rd wireless communication apparatus. 第３無線通信装置のハードウェア構成例を示す図である。It is a figure which shows the hardware configuration example of the 3rd wireless communication apparatus.
　まず、本発明がなされるに至った背景について説明する。上述したように、増大している無線トラヒックを収容するために、同一無線周波数を空間的に高頻度で再利用する周波数共用技術を用いることがある。 First, the background leading to the present invention will be described. As mentioned above, frequency sharing techniques that spatially and frequently reuse the same radio frequency may be used to accommodate the increasing radio traffic.
　例えば、電波の干渉を受ける被干渉無線装置（被干渉局）が干渉波受信電力を測定し、所望の希望波干渉波電力比を満たすか否かに応じて、可能な限り同一無線周波数を空間的に高頻度で再利用するという方法が考えられる。 For example, an interfered radio device (interfered station) that receives radio wave interference measures the interference wave received power, and depending on whether or not the desired desired wave interference wave power ratio is satisfied, the same radio frequency is spatially used as much as possible. A method of reusing it frequently is conceivable.
　しかしながら、被干渉無線装置は、希望波を受信中に干渉波の受信電力を分離させて測定することができない。また、被干渉無線装置は、干渉波受信電力を測定できたとしても、干渉波受信電力の測定値を一般的に与干渉無線装置（与干渉局）へ通知することができない。通常、与干渉無線装置と被干渉無線装置との間では、通信リンクを確立することができないためである。 However, the interfered radio device cannot measure the received power of the interfering wave separately while receiving the desired wave. Further, even if the interfered radio device can measure the interference wave reception power, the measured value of the interference wave reception power cannot generally be notified to the interfering radio device (interfering station). This is because it is usually not possible to establish a communication link between the interfering radio device and the interfering radio device.
　以下に図面を用いて説明する無線通信システムは、電波信号が他の無線通信装置に与える干渉を容易に低減することを可能にするように構成されている。 The wireless communication system described below with reference to the drawings is configured to enable easy reduction of interference caused by radio signals to other wireless communication devices.
　図１は、一実施形態にかかる無線通信システム１の概要を例示する図である。図１に示すように、無線通信システム１は、例えば被干渉局となる第１無線通信装置１０、代理報告局となる第２無線通信装置２０、及び与干渉局となる第３無線通信装置３０とを有する。なお、第１無線通信装置１０、第２無線通信装置２０、及び第３無線通信装置３０は、移動する無線通信装置であってもよい。 FIG. 1 is a diagram illustrating an outline of a wireless communication system 1 according to an embodiment. As shown in FIG. 1, the wireless communication system 1 includes, for example, a first wireless communication device 10 as an interfering station, a second wireless communication device 20 as a proxy reporting station, and a third wireless communication device 30 as an interfering station. And have. The first wireless communication device 10, the second wireless communication device 20, and the third wireless communication device 30 may be mobile wireless communication devices.
　第１無線通信装置１０は、第３無線通信装置３０との間で相互に無線通信を行う。第２無線通信装置２０は、第３無線通信装置３０が送信する測定信号（後述）を受信して応答する簡易な構成の無線通信装置であり、例えば固定部材１５０を介して第１無線通信装置１０に設置されている。 The first wireless communication device 10 mutually wirelessly communicates with the third wireless communication device 30. The second wireless communication device 20 is a wireless communication device having a simple configuration that receives and responds to a measurement signal (described later) transmitted by the third wireless communication device 30, for example, the first wireless communication device via a fixing member 150. It is installed at 10.
　つまり、第２無線通信装置２０は、第３無線通信装置３０が送信する測定信号を第１無線通信装置１０とほぼ同じ位置で検出するセンサとしての機能を備えている。なお、第２無線通信装置２０は、第１無線通信装置１０が第３無線通信装置３０から受ける干渉を、第１無線通信装置１０の代理として測定可能であれば、第１無線通信装置１０とは独立して移動してもよい。 That is, the second wireless communication device 20 has a function as a sensor that detects the measurement signal transmitted by the third wireless communication device 30 at substantially the same position as the first wireless communication device 10. The second wireless communication device 20 may be used with the first wireless communication device 10 if the interference received by the first wireless communication device 10 from the third wireless communication device 30 can be measured on behalf of the first wireless communication device 10. May move independently.
　より具体的には、第１無線通信装置１０は、アンテナ１００、無線通信部１０２及び信号処理部１０４を有する。 More specifically, the first wireless communication device 10 has an antenna 100, a wireless communication unit 102, and a signal processing unit 104.
　アンテナ１００は、第１無線通信装置１０が第３無線通信装置３０との間で電波信号を送受信するために用いられる。無線通信部１０２は、信号処理部１０４が処理した信号（例えばデータ信号）を、アンテナ１００を介して第３無線通信装置３０へ送信する。また、無線通信部１０２は、第３無線通信装置３０から送信された信号（例えばデータ信号）を、アンテナ１００を介して受信する。 The antenna 100 is used by the first wireless communication device 10 to send and receive radio signals to and from the third wireless communication device 30. The wireless communication unit 102 transmits a signal (for example, a data signal) processed by the signal processing unit 104 to the third wireless communication device 30 via the antenna 100. Further, the wireless communication unit 102 receives a signal (for example, a data signal) transmitted from the third wireless communication device 30 via the antenna 100.
　第２無線通信装置２０は、アンテナ２００、無線通信部２０２、測定部２０４、判定部２０６、及び応答信号生成部２０８を有し、第３無線通信装置３０との間で互いに無線通信を行う。 The second wireless communication device 20 has an antenna 200, a wireless communication unit 202, a measurement unit 204, a determination unit 206, and a response signal generation unit 208, and wirelessly communicates with the third wireless communication device 30.
　アンテナ２００は、第２無線通信装置２０が第３無線通信装置３０との間で電波信号を送受信するために用いられる。また、アンテナ２００は、例えば第１無線通信装置１０が第３無線通信装置３０に対して送信している電波信号も受信する。 The antenna 200 is used by the second wireless communication device 20 to transmit and receive radio signals to and from the third wireless communication device 30. The antenna 200 also receives, for example, a radio signal transmitted by the first wireless communication device 10 to the third wireless communication device 30.
　無線通信部２０２は、第３無線通信装置３０が送信する測定信号を、アンテナ２００を介して受信し、測定部２０４に対して出力する。なお、第３無線通信装置３０が送信する測定信号は、第１無線通信装置１０を被干渉局とし、第３無線通信装置３０を与干渉局とした場合に、第１無線通信装置１０が受ける電波の干渉を測定するために、第２無線通信装置２０が代理として受信する信号である。 The wireless communication unit 202 receives the measurement signal transmitted by the third wireless communication device 30 via the antenna 200 and outputs the measurement signal to the measurement unit 204. The measurement signal transmitted by the third wireless communication device 30 is received by the first wireless communication device 10 when the first wireless communication device 10 is an interfering station and the third wireless communication device 30 is an interfering station. This is a signal received by the second wireless communication device 20 as a proxy for measuring the interference of radio waves.
　また、無線通信部２０２は、第１無線通信装置１０が第３無線通信装置３０に対して送信する信号を、アンテナ２００を介して受信し、判定部２０６に対して出力する。さらに、無線通信部２０２は、応答信号生成部２０８が生成した応答信号（後述）を、無線通信部２０２を介して第３無線通信装置３０へ送信する。 Further, the wireless communication unit 202 receives the signal transmitted by the first wireless communication device 10 to the third wireless communication device 30 via the antenna 200, and outputs the signal to the determination unit 206. Further, the wireless communication unit 202 transmits the response signal (described later) generated by the response signal generation unit 208 to the third wireless communication device 30 via the wireless communication unit 202.
　測定部２０４は、無線通信部２０２が受信した測定信号の電力（信号レベル）を測定し、測定結果を判定部２０６に対して出力する。 The measurement unit 204 measures the power (signal level) of the measurement signal received by the wireless communication unit 202, and outputs the measurement result to the determination unit 206.
　判定部２０６は、測定部２０４から測定結果を入力された場合、第１無線通信装置１０が第３無線通信装置３０に対して送信している電波信号があるか否かを判定する。そして、判定部２０６は、第１無線通信装置１０が電波信号を送信していないときに、測定部２０４から入力された測定結果を応答信号生成部２０８に対して出力する。 When the measurement result is input from the measurement unit 204, the determination unit 206 determines whether or not there is a radio signal transmitted by the first wireless communication device 10 to the third wireless communication device 30. Then, the determination unit 206 outputs the measurement result input from the measurement unit 204 to the response signal generation unit 208 when the first wireless communication device 10 is not transmitting the radio wave signal.
　応答信号生成部２０８は、測定部２０４の測定結果を判定部２０６から入力されると、例えば上述した測定信号の受信レベルを示す応答信号（受信レベル情報）として生成し、生成した応答信号を無線通信部２０２に対して出力する。 When the measurement result of the measurement unit 204 is input from the determination unit 206, the response signal generation unit 208 generates, for example, a response signal (reception level information) indicating the reception level of the measurement signal described above, and wirelessly generates the generated response signal. Output to the communication unit 202.
　第３無線通信装置３０は、アンテナ３００、無線通信部３０２、信号処理部３０４、測定信号生成部３０６、判定部３０８、測定部３１０、推定部３１２、及び設定部３１４を有し、第１無線通信装置１０及び第２無線通信装置２０との間で互いに無線通信を行う。 The third wireless communication device 30 includes an antenna 300, a wireless communication unit 302, a signal processing unit 304, a measurement signal generation unit 306, a determination unit 308, a measurement unit 310, an estimation unit 312, and a setting unit 314. Wireless communication is performed with each other between the communication device 10 and the second wireless communication device 20.
　アンテナ３００は、第３無線通信装置３０が第１無線通信装置１０及び第２無線通信装置２０との間で電波信号を送受信するために用いられる。無線通信部３０２は、信号処理部３０４が処理した信号（例えばデータ信号）を、アンテナ３００を介して第１無線通信装置１０へ送信する。また、無線通信部３０２は、測定信号生成部３０６が生成した測定信号を、アンテナ３００を介して第２無線通信装置２０へ送信する。 The antenna 300 is used by the third wireless communication device 30 for transmitting and receiving radio signals between the first wireless communication device 10 and the second wireless communication device 20. The wireless communication unit 302 transmits a signal (for example, a data signal) processed by the signal processing unit 304 to the first wireless communication device 10 via the antenna 300. Further, the wireless communication unit 302 transmits the measurement signal generated by the measurement signal generation unit 306 to the second wireless communication device 20 via the antenna 300.
　ここでは、無線通信部３０２は、信号処理部３０４又は測定信号生成部３０６から入力される信号に応じた出力電力で信号を送信することとする。 Here, the wireless communication unit 302 transmits the signal with the output power corresponding to the signal input from the signal processing unit 304 or the measurement signal generation unit 306.
　また、無線通信部３０２は、第１無線通信装置１０が送信した電波信号、及び第２無線通信装置２０が送信した応答信号を、アンテナ３００を介して受信し、信号処理部３０４及び判定部３０８に対して出力する。 Further, the wireless communication unit 302 receives the radio wave signal transmitted by the first wireless communication device 10 and the response signal transmitted by the second wireless communication device 20 via the antenna 300, and receives the signal processing unit 304 and the determination unit 308. Output to.
　測定信号生成部３０６は、後述する設定部３１４による設定に基づいて、第３無線通信装置３０から発射する測定信号を、例えば低電力の測定信号から高電力の測定信号へ徐々に変更しつつ生成し、無線通信部３０２に対して出力する。 The measurement signal generation unit 306 generates a measurement signal emitted from the third wireless communication device 30 while gradually changing it from, for example, a low power measurement signal to a high power measurement signal, based on the setting by the setting unit 314 described later. Then, it is output to the wireless communication unit 302.
　判定部３０８は、無線通信部３０２から入力された信号が、第２無線通信装置２０が送信した応答信号であるか否かを判定し、応答信号であると判定した場合には当該応答信号を測定部３１０に対して出力する。判定部３０８は、応答信号を受信できたか否かを判定し、受信できたと判定した場合に応答信号を測定部３１０に対して出力してもよい。 The determination unit 308 determines whether or not the signal input from the wireless communication unit 302 is a response signal transmitted by the second wireless communication device 20, and if it is determined to be a response signal, the determination unit 308 determines the response signal. Output to the measuring unit 310. The determination unit 308 may determine whether or not the response signal has been received, and if it is determined that the response signal has been received, output the response signal to the measurement unit 310.
　測定部３１０は、判定部３０８から入力された応答信号の電力（信号レベル）を測定し、測定結果を推定部３１２に対して出力する。 The measurement unit 310 measures the power (signal level) of the response signal input from the determination unit 308, and outputs the measurement result to the estimation unit 312.
　推定部３１２は、測定部３１０が測定した応答信号の電力に基づいて、第１無線通信装置１０における干渉波受信電力を推定し、推定結果を設定部３１４に対して出力する。 The estimation unit 312 estimates the interference wave reception power in the first wireless communication device 10 based on the power of the response signal measured by the measurement unit 310, and outputs the estimation result to the setting unit 314.
　設定部３１４は、推定部３１２が推定した干渉波受信電力に基づいて、第３無線通信装置３０から第１無線通信装置１０へ発射するデータ信号の送信電力を例えば信号処理部３０４に対して設定する。例えば、設定部３１４は、推定部３１２が推定した干渉波受信電力が所定値（閾値）未満となる出力電力値に基づいて、第３無線通信装置３０から第１無線通信装置１０へ発射するデータ信号の送信電力を設定する。 The setting unit 314 sets the transmission power of the data signal emitted from the third wireless communication device 30 to the first wireless communication device 10 to, for example, the signal processing unit 304 based on the interference wave reception power estimated by the estimation unit 312. do. For example, the setting unit 314 emits data from the third wireless communication device 30 to the first wireless communication device 10 based on the output power value at which the interference wave reception power estimated by the estimation unit 312 is less than a predetermined value (threshold). Set the signal transmission power.
　また、設定部３１４は、測定信号生成部３０６が生成する測定信号を、低電力の測定信号から高電力の測定信号へ徐々に変更しつつ生成するように設定を行う。この場合、設定部３１４は、例えば第１無線通信装置１０に対する干渉を所定値未満に抑える範囲内で最大となる送信電力で測定信号を生成するように測定信号生成部３０６へ設定を行う。その後、設定部３１４は、当該送信電力（レベル）でデータ信号のみを送信するように信号処理部３０４に対して設定を行う。 Further, the setting unit 314 is set so that the measurement signal generated by the measurement signal generation unit 306 is generated while gradually changing from the low power measurement signal to the high power measurement signal. In this case, the setting unit 314 sets the measurement signal generation unit 306 so as to generate the measurement signal with the maximum transmission power within the range in which the interference with the first wireless communication device 10 is suppressed to less than a predetermined value, for example. After that, the setting unit 314 sets the signal processing unit 304 so that only the data signal is transmitted at the transmission power (level).
　つまり、信号処理部３０４は、設定部３１４が設定した送信電力に合わせて、無線通信部３０２及びアンテナ３００を介してデータ信号を第１無線通信装置１０へ送信することとなる。 That is, the signal processing unit 304 transmits the data signal to the first wireless communication device 10 via the wireless communication unit 302 and the antenna 300 in accordance with the transmission power set by the setting unit 314.
　次に、無線通信システム１の具体的な動作例について説明する。図２は、第３無線通信装置３０と第２無線通信装置２０とが行う通信のシーケンスを例示するシーケンス図である。図２に示すように、まず、第３無線通信装置３０は、第２無線通信装置２０に対して測定信号を送信する（Ｓ１００）。第２無線通信装置２０は、測定信号を受信すると、応答信号を第３無線通信装置３０に対して送信する（Ｓ１０２）。 Next, a specific operation example of the wireless communication system 1 will be described. FIG. 2 is a sequence diagram illustrating a sequence of communication performed by the third wireless communication device 30 and the second wireless communication device 20. As shown in FIG. 2, first, the third wireless communication device 30 transmits a measurement signal to the second wireless communication device 20 (S100). Upon receiving the measurement signal, the second wireless communication device 20 transmits a response signal to the third wireless communication device 30 (S102).
　つまり、無線通信システム１は、第１無線通信装置１０に対する干渉波を測定するために、第３無線通信装置３０が第２無線通信装置２０に対して信号強度の照会を行うと、第２無線通信装置２０が第３無線通信装置３０に対して干渉波の信号強度の応答を行う。 That is, in the wireless communication system 1, when the third wireless communication device 30 inquires the second wireless communication device 20 of the signal strength in order to measure the interference wave with respect to the first wireless communication device 10, the second wireless communication device 1 is used. The communication device 20 responds to the third wireless communication device 30 with the signal strength of the interference wave.
　次に、第３無線通信装置３０の具体的な動作例について説明する。図３は、第３無線通信装置３０の第１動作例を示すフローチャートである。図３に示すように、第３無線通信装置３０は、まず、待機状態から測定信号を発射する状態へ遷移する（Ｓ２００）。 Next, a specific operation example of the third wireless communication device 30 will be described. FIG. 3 is a flowchart showing a first operation example of the third wireless communication device 30. As shown in FIG. 3, the third wireless communication device 30 first transitions from the standby state to the state of emitting the measurement signal (S200).
　次に、第３無線通信装置３０は、判定部３０８が応答信号を受信できたか否かを判定し（Ｓ２０２）、受信できた場合（Ｓ２０２：Ｙｅｓ）にはＳ２０４の処理に進み、受信できなかった場合（Ｓ２０２：Ｎｏ）には処理を終了する。 Next, the third wireless communication device 30 determines whether or not the response signal can be received by the determination unit 308 (S202), and if it can be received (S202: Yes), proceeds to the process of S204 and cannot receive the response signal. If (S202: No), the process ends.
　設定部３１４は、測定部３１０の測定結果に基づいて推定部３１２が推定した干渉波受信電力（信号レベル）が所定の閾値未満であるか否かを判定する（Ｓ２０４）。そして、設定部３１４は、信号レベルが所定の閾値未満である場合（Ｓ２０４：Ｙｅｓ）にはＳ２０６の処理に進み、信号レベルが所定の閾値未満でない場合（Ｓ２０４：Ｎｏ）には測定信号の送信出力を下げる設定を行う（Ｓ２０８）。 The setting unit 314 determines whether or not the interference wave reception power (signal level) estimated by the estimation unit 312 based on the measurement result of the measurement unit 310 is less than a predetermined threshold value (S204). Then, the setting unit 314 proceeds to the process of S206 when the signal level is less than the predetermined threshold value (S204: Yes), and transmits the measurement signal when the signal level is not less than the predetermined threshold value (S204: No). Set to lower the output (S208).
　また、設定部３１４は、測定信号に基づく応答信号の送信出力が最大であったか否かを判定する（Ｓ２０６）。そして、設定部３１４は、応答信号の送信出力が最大でなかった場合（Ｓ２０６：Ｎｏ）には測定信号の送信出力を上げる設定を行い（Ｓ２１０）、応答信号の送信出力が最大であった場合（Ｓ２０６：Ｙｅｓ）には処理を終了する。 Further, the setting unit 314 determines whether or not the transmission output of the response signal based on the measurement signal is the maximum (S206). Then, the setting unit 314 makes a setting to increase the transmission output of the measurement signal when the transmission output of the response signal is not the maximum (S206: No) (S210), and when the transmission output of the response signal is the maximum. (S206: Yes) ends the process.
　その後、設定部３１４は、第１無線通信装置１０に対する干渉を所定値未満に抑える範囲内で最大となる送信電力の測定信号と同じ送信電力でデータ信号のみを送信するように信号処理部３０４に対して設定を行う。 After that, the setting unit 314 tells the signal processing unit 304 to transmit only the data signal with the same transmission power as the measurement signal of the transmission power that is the maximum within the range in which the interference with the first wireless communication device 10 is suppressed to less than a predetermined value. Set for.
　図４は、第２無線通信装置２０の動作例を示すフローチャートである。図４に示すように、まず、第２無線通信装置２０は、第３無線通信装置３０から送信される測定信号を待機する（Ｓ３００）。そして、第２無線通信装置２０は、測定信号を受信した場合（Ｓ３０２：Ｙｅｓ）にはＳ３０４の処理に進み、その他の場合（Ｓ３０２：Ｎｏ）にはＳ３００の処理に戻る。 FIG. 4 is a flowchart showing an operation example of the second wireless communication device 20. As shown in FIG. 4, first, the second wireless communication device 20 waits for the measurement signal transmitted from the third wireless communication device 30 (S300). Then, when the second wireless communication device 20 receives the measurement signal (S302: Yes), the process proceeds to the process of S304, and in other cases (S302: No), the process returns to the process of S300.
　Ｓ３０４の処理において、測定部２０４は、無線通信部２０２が受信した測定信号の電力（信号レベル）を測定する。 In the process of S304, the measuring unit 204 measures the power (signal level) of the measurement signal received by the wireless communication unit 202.
　次に、判定部２０６は、第１無線通信装置１０（被干渉局）が第３無線通信装置３０に対して電波を発射しているか（送信している電波信号があるか）否かを判定する（Ｓ３０６）。判定部２０６は、被干渉局が電波を発射していると判定した場合（Ｓ３０６：Ｙｅｓ）には、Ｓ３０６の処理を継続する。また、判定部２０６は、被干渉局が電波を発射していないと判定した場合（Ｓ３０６：Ｎｏ）には、測定部２０４から入力された測定結果を応答信号生成部２０８に対して出力し、Ｓ３０８の処理に進む。 Next, the determination unit 206 determines whether or not the first wireless communication device 10 (interfered station) is emitting radio waves to the third wireless communication device 30 (whether or not there is a radio wave signal being transmitted). (S306). When the determination unit 206 determines that the interfered station is emitting radio waves (S306: Yes), the determination unit 206 continues the processing of S306. Further, when the determination unit 206 determines that the interfered station does not emit radio waves (S306: No), the determination unit 206 outputs the measurement result input from the measurement unit 204 to the response signal generation unit 208. Proceed to the process of S308.
　応答信号生成部２０８は、測定部２０４の測定結果を判定部２０６から入力されると、測定信号の信号レベルを応答信号として生成し、無線通信部２０２及びアンテナ２００を介して、生成した応答信号を第３無線通信装置３０へ送信し、Ｓ３００の処理に戻る。 When the measurement result of the measurement unit 204 is input from the determination unit 206, the response signal generation unit 208 generates the signal level of the measurement signal as a response signal, and the response signal generated via the wireless communication unit 202 and the antenna 200. Is transmitted to the third wireless communication device 30, and the process returns to S300.
　次に、第３無線通信装置３０の第２動作例について説明する。図５は、第３無線通信装置３０の第２動作例を示すフローチャートである。図５に示すように、第３無線通信装置３０は、測定信号を例えば最大電力の１／２の電力で発射する（Ｓ４００）。 Next, a second operation example of the third wireless communication device 30 will be described. FIG. 5 is a flowchart showing a second operation example of the third wireless communication device 30. As shown in FIG. 5, the third wireless communication device 30 emits a measurement signal with, for example, ½ of the maximum power (S400).
　次に、第３無線通信装置３０は、判定部３０８が測定信号を受信できたか否かを判定し（Ｓ４０２）、受信できなかった場合（Ｓ４０２：Ｎｏ）にはＳ４０４の処理に進み、受信できた場合（Ｓ４０２：Ｙｅｓ）にはＳ４０８の処理に進む。 Next, the third wireless communication device 30 determines whether or not the measurement signal can be received by the determination unit 308 (S402), and if it cannot be received (S402: No), proceeds to the process of S404 and can receive the measurement signal. If (S402: Yes), the process proceeds to S408.
　Ｓ４０４の処理において、設定部３１４は、測定信号が最大出力であったか否かを判定し、最大出力でなかった場合（Ｓ４０４：Ｎｏ）にはＳ４０６の処理に進み、最大出力であった場合（Ｓ４０４：Ｙｅｓ）にはＳ４０８の処理に進む。 In the processing of S404, the setting unit 314 determines whether or not the measurement signal is the maximum output, and if it is not the maximum output (S404: No), proceeds to the processing of S406, and if it is the maximum output (S404). : Yes), the process proceeds to S408.
　Ｓ４０６の処理において、設定部３１４が測定信号の出力を増加させる設定を測定信号生成部３０６に対して行い、測定信号生成部３０６が無線通信部３０２及びアンテナ３００を介して出力電力を増加させて測定信号を発射させる。 In the processing of S406, the setting unit 314 sets the measurement signal generation unit 306 to increase the output of the measurement signal, and the measurement signal generation unit 306 increases the output power via the wireless communication unit 302 and the antenna 300. Fire a measurement signal.
　このとき、設定部３１４は、測定信号の出力電力の増加分を例えば下式（１）に示したように設定する。 At this time, the setting unit 314 sets the increase in the output power of the measurement signal as shown in the following equation (1), for example.
　　測定信号の出力電力の増加分
　＝（最大出力電力）×（１／２）∧（Ｓ４０６の処理回数＋１）・・・（１） Increase in output power of measurement signal = (maximum output power) x (1/2) ∧ (number of processing of S406 + 1) ... (1)
　そして、設定部３１４は、測定部３１０の測定結果に基づいて推定部３１２が推定した干渉波受信電力（信号レベル）が所定の閾値未満であるか否かを判定する（Ｓ４０８）。設定部３１４は、信号レベルが所定の閾値未満でない場合（Ｓ４０８：Ｎｏ）には測定信号の送信出力を下げる設定を行い（Ｓ４１０）、信号レベルが所定の閾値未満である場合（Ｓ４０８：Ｙｅｓ）には処理を終了する。 Then, the setting unit 314 determines whether or not the interference wave reception power (signal level) estimated by the estimation unit 312 based on the measurement result of the measurement unit 310 is less than a predetermined threshold value (S408). The setting unit 314 makes a setting to lower the transmission output of the measurement signal when the signal level is not less than the predetermined threshold value (S408: No) (S410), and when the signal level is less than the predetermined threshold value (S408: Yes). Ends the process.
　その後、設定部３１４は、第１無線通信装置１０に対する干渉を所定値未満に抑える範囲内で最大となる送信電力の測定信号と同じ送信電力でデータ信号のみを送信するように信号処理部３０４に対して設定を行うこととなる。 After that, the setting unit 314 tells the signal processing unit 304 to transmit only the data signal with the same transmission power as the measurement signal of the transmission power that is the maximum within the range in which the interference with the first wireless communication device 10 is suppressed to less than a predetermined value. It will be set for this.
　このように、無線通信システム１は、測定信号の受信レベルを示す応答信号を第２無線通信装置２０が第３無線通信装置３０へ送信し、応答信号に基づいて第３無線通信装置３０が第１無線通信装置１０へ送信する信号のレベルを設定する。このとき、第１無線通信装置１０は、干渉波を測定する機能、及び測定した干渉波を示す情報を第３無線通信装置３０へ送信する機能を備える必要がない。 As described above, in the wireless communication system 1, the second wireless communication device 20 transmits a response signal indicating the reception level of the measurement signal to the third wireless communication device 30, and the third wireless communication device 30 is the third based on the response signal. 1 Set the level of the signal transmitted to the wireless communication device 10. At this time, the first wireless communication device 10 does not need to have a function of measuring the interference wave and a function of transmitting information indicating the measured interference wave to the third wireless communication device 30.
　つまり、無線通信システム１は、第３無線通信装置３０が発射する電波信号が第１無線通信装置１０に与える干渉を容易に低減することを可能にする。 That is, the wireless communication system 1 makes it possible to easily reduce the interference that the radio wave signal emitted by the third wireless communication device 30 gives to the first wireless communication device 10.
　なお、第３無線通信装置３０が有する各機能は、それぞれ一部又は全部がハードウェアによって構成されてもよいし、ＣＰＵ等のプロセッサが実行するプログラムとして構成されてもよい。 Each function of the third wireless communication device 30 may be partially or wholly configured by hardware, or may be configured as a program executed by a processor such as a CPU.
　すなわち、第３無線通信装置３０は、コンピュータとプログラムを用いて実現することができ、プログラムを記憶媒体に記録することも、ネットワークを通して提供することも可能である。 That is, the third wireless communication device 30 can be realized by using a computer and a program, and the program can be recorded on a storage medium or provided through a network.
　図６は、第３無線通信装置３０のハードウェア構成例を示す図である。図６に示すように、第３無線通信装置３０は、例えば入力部５０、出力部５１、通信部５２、ＣＰＵ５３、メモリ５４及びＨＤＤ５５がバス５６を介して接続され、コンピュータとしての機能を備える。また、第３無線通信装置３０は、記憶媒体５７との間でデータを入出力することができるようにされている。 FIG. 6 is a diagram showing a hardware configuration example of the third wireless communication device 30. As shown in FIG. 6, the third wireless communication device 30 has, for example, an input unit 50, an output unit 51, a communication unit 52, a CPU 53, a memory 54, and an HDD 55 connected via a bus 56, and has a function as a computer. Further, the third wireless communication device 30 is capable of inputting / outputting data to / from the storage medium 57.
　入力部５０は、例えばキーボード及びマウス等である。出力部５１は、例えばディスプレイなどの表示装置である。通信部５２は、例えば無線のネットワークインターフェースである。 The input unit 50 is, for example, a keyboard, a mouse, or the like. The output unit 51 is a display device such as a display. The communication unit 52 is, for example, a wireless network interface.
　ＣＰＵ５３は、第３無線通信装置３０を構成する各部を制御し、上述した処理を行う。メモリ５４及びＨＤＤ５５は、データ及び無線通信プログラム等を記憶する。したがって、第３無線通信装置３０は、予めメモリ５４及びＨＤＤ５５が記憶している情報を用いて処理を行うように構成されてもよい。 The CPU 53 controls each part constituting the third wireless communication device 30 and performs the above-mentioned processing. The memory 54 and the HDD 55 store data, a wireless communication program, and the like. Therefore, the third wireless communication device 30 may be configured to perform processing using the information stored in the memory 54 and the HDD 55 in advance.
　記憶媒体５７は、第３無線通信装置３０が有する機能を実行させる無線通信プログラム等を記憶可能にされている。なお、第３無線通信装置３０を構成するアーキテクチャは、図６に示した例に限定されない。また、第１無線通信装置１０及び第２無線通信装置２０も、第３無線通信装置３０と同様の構成を備えていてもよい。 The storage medium 57 is made capable of storing a wireless communication program or the like that executes the function of the third wireless communication device 30. The architecture constituting the third wireless communication device 30 is not limited to the example shown in FIG. Further, the first wireless communication device 10 and the second wireless communication device 20 may also have the same configuration as the third wireless communication device 30.
　１・・・無線通信システム、１０・・・第１無線通信装置、２０・・・第２無線通信装置、３０・・・第３無線通信装置、５０・・・入力部、５１・・・出力部、５２・・・通信部、５３・・・ＣＰＵ、５４・・・メモリ、５５・・・ＨＤＤ、５６・・・バス、５７・・・記憶媒体、１００・・・アンテナ、１０２・・・無線通信部、１０４・・・信号処理部、１５０・・・固定部材、２００・・・アンテナ、２０２・・・無線通信部、２０４・・・測定部、２０６・・・判定部、２０８・・・応答信号生成部、３００・・・アンテナ、３０２・・・無線通信部、３０４・・・信号処理部、３０６・・・測定信号生成部、３０８・・・判定部、３１０・・・測定部、３１２・・・推定部、３１４・・・設定部
  1 ... Wireless communication system, 10 ... 1st wireless communication device, 20 ... 2nd wireless communication device, 30 ... 3rd wireless communication device, 50 ... Input unit, 51 ... Output Unit, 52 ... Communication unit, 53 ... CPU, 54 ... Memory, 55 ... HDD, 56 ... Bus, 57 ... Storage medium, 100 ... Antenna, 102 ... Wireless communication unit, 104 ... signal processing unit, 150 ... fixed member, 200 ... antenna, 202 ... wireless communication unit, 204 ... measurement unit, 206 ... judgment unit, 208 ... Response signal generation unit, 300 ... antenna, 302 ... wireless communication unit, 304 ... signal processing unit, 306 ... measurement signal generation unit, 308 ... judgment unit, 310 ... measurement unit 312 ... estimation unit, 314 ... setting unit

Claims (4)

  1. 　干渉波の影響を受け得る第１無線通信装置に設けられた第２無線通信装置によって、干渉波となり得る電波を発射する第３無線通信装置が発射した測定信号の受信レベルを示す受信レベル情報を前記第３無線通信装置へ送信する送信工程と、
    　前記受信レベル情報に基づいて、前記第３無線通信装置が前記第１無線通信装置へ送信する信号のレベルを設定する設定工程と
    　を含むことを特徴とする無線通信方法。     Received level information indicating the reception level of the measurement signal emitted by the third wireless communication device that emits radio waves that can be an interference wave by the second wireless communication device provided in the first wireless communication device that can be affected by the interference wave. The transmission step of transmitting to the third wireless communication device and
    A wireless communication method comprising a setting step of setting a level of a signal transmitted by the third wireless communication device to the first wireless communication device based on the reception level information.
  2. 　前記測定信号を低電力から高電力へ徐々に変更しつつ生成する測定信号生成工程を含むこと
    　を特徴とする請求項１に記載の無線通信方法。     The wireless communication method according to claim 1, further comprising a measurement signal generation step of generating the measurement signal while gradually changing the measurement signal from low power to high power.
  3. 　干渉波の影響を受け得る第１無線通信装置と、
    　前記第１無線通信装置に設けられた第２無線通信装置と、
    　干渉波となり得る電波を発射する第３無線通信装置と
    　を備え、
    　前記第２無線通信装置は、
    　前記第３無線通信装置が発射した測定信号の受信レベルを示す受信レベル情報を前記第３無線通信装置へ送信し、
    　前記第３無線通信装置は、
    　前記受信レベル情報に基づいて、前記第１無線通信装置へ送信する信号のレベルを設定すること
    　を特徴とする無線通信システム。     The first wireless communication device that can be affected by interference waves,
    The second wireless communication device provided in the first wireless communication device and
    Equipped with a third wireless communication device that emits radio waves that can be interference waves
    The second wireless communication device is
    The reception level information indicating the reception level of the measurement signal emitted by the third wireless communication device is transmitted to the third wireless communication device.
    The third wireless communication device is
    A wireless communication system characterized in that the level of a signal transmitted to the first wireless communication device is set based on the reception level information.
  4. 　前記第３無線通信装置は、
    　前記測定信号を低電力から高電力へ徐々に変更しつつ発射すること
    　を特徴とする請求項３に記載の無線通信システム。
          The third wireless communication device is
    The wireless communication system according to claim 3, wherein the measurement signal is emitted while gradually changing from low power to high power.
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WO2011108380A1 (en) * 2010-03-01 2011-09-09 日本電気株式会社 Wireless communication device, wireless communication system, applied-interference control method, recording medium, and control device
JP2015056696A (en) * 2013-09-10 2015-03-23 株式会社東芝 Communication device and communication method

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JP2014171072A (en) 2013-03-04 2014-09-18 Fumiyo Kobayashi Communication system, communication terminal, control program, and communication method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011108380A1 (en) * 2010-03-01 2011-09-09 日本電気株式会社 Wireless communication device, wireless communication system, applied-interference control method, recording medium, and control device
JP2015056696A (en) * 2013-09-10 2015-03-23 株式会社東芝 Communication device and communication method

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