WO2021229805A1 - Procédé de communication radio et système de communication radio - Google Patents

Procédé de communication radio et système de communication radio 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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WO
WIPO (PCT)
Prior art keywords
wireless communication
communication device
unit
signal
measurement signal
Prior art date
Application number
PCT/JP2020/019476
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English (en)
Japanese (ja)
Inventor
陸 大宮
友規 村上
智明 小川
泰司 鷹取
Original Assignee
日本電信電話株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 日本電信電話株式会社 filed Critical 日本電信電話株式会社
Priority to JP2022522480A priority Critical patent/JP7371772B2/ja
Priority to PCT/JP2020/019476 priority patent/WO2021229805A1/fr
Publication of WO2021229805A1 publication Critical patent/WO2021229805A1/fr

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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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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un procédé de communication radio selon un mode de réalisation de la présente invention est caractérisé en ce qu'il comprend : une étape de transmission consistant à transmettre, à un troisième dispositif de communication radio qui émet des ondes radio qui peuvent devenir des ondes d'interférence, au moyen d'un second dispositif de communication radio disposé dans un premier dispositif de communication radio qui peut être affecté par les ondes d'interférence, des informations de niveau de réception indiquant le niveau de réception d'un signal de mesure émis par le troisième dispositif de communication radio ; et une étape de réglage consistant à régler le niveau d'un signal transmis par le troisième dispositif de communication radio au premier dispositif de radiocommunication, sur la base des informations de niveau de réception. En outre, le procédé de communication radio selon le mode de réalisation peut comprendre une étape de génération de signal de mesure consistant à générer le signal de mesure tout en changeant progressivement celui-ci d'une puissance faible à une puissance élevée.
PCT/JP2020/019476 2020-05-15 2020-05-15 Procédé de communication radio et système de communication radio WO2021229805A1 (fr)

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JP2022522480A JP7371772B2 (ja) 2020-05-15 2020-05-15 無線通信方法及び無線通信システム
PCT/JP2020/019476 WO2021229805A1 (fr) 2020-05-15 2020-05-15 Procédé de communication radio et système de communication radio

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011108380A1 (fr) * 2010-03-01 2011-09-09 日本電気株式会社 Dispositif de communication sans fil, système de communication sans fil, procédé de commande d'interférence appliquée, support d'enregistrement et dispositif de commande
JP2015056696A (ja) * 2013-09-10 2015-03-23 株式会社東芝 通信装置および通信方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014171072A (ja) * 2013-03-04 2014-09-18 Fumiyo Kobayashi 通信システム、通信端末及び制御プログラム並びに通信方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011108380A1 (fr) * 2010-03-01 2011-09-09 日本電気株式会社 Dispositif de communication sans fil, système de communication sans fil, procédé de commande d'interférence appliquée, support d'enregistrement et dispositif de commande
JP2015056696A (ja) * 2013-09-10 2015-03-23 株式会社東芝 通信装置および通信方法

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