WO2015151138A1 - Wireless communication system, wireless device, wireless communication method and non-transitory computer readable medium - Google Patents

Wireless communication system, wireless device, wireless communication method and non-transitory computer readable medium Download PDF

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Publication number
WO2015151138A1
WO2015151138A1 PCT/JP2014/004720 JP2014004720W WO2015151138A1 WO 2015151138 A1 WO2015151138 A1 WO 2015151138A1 JP 2014004720 W JP2014004720 W JP 2014004720W WO 2015151138 A1 WO2015151138 A1 WO 2015151138A1
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Prior art keywords
information
wireless
wireless communication
communication system
wireless device
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PCT/JP2014/004720
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French (fr)
Japanese (ja)
Inventor
至智 藁科
康則 二木
弘人 菅原
一志 村岡
健司 若藤
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日本電気株式会社
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Priority to JP2016511172A priority Critical patent/JPWO2015151138A1/en
Publication of WO2015151138A1 publication Critical patent/WO2015151138A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
    • H04W84/20—Master-slave selection or change arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup

Definitions

  • the present invention relates to a wireless communication system, a wireless device, a wireless communication method, and a wireless communication program that perform wireless communication.
  • a cognitive radio terminal is used by using a database having information on the frequency usage status of neighboring existing radio communication systems and a function of calculating available frequencies for each position and time.
  • a frequency selection method for dynamically assigning frequencies has been proposed.
  • the current position information 90 is notified to the database 80, and the allocation frequency 91 for the vehicle 70 and the usable range 92 of the allocation frequency 91 are acquired from the database 80.
  • the database 80 is a device that stores information on the frequency usage status and geography of the existing wireless communication system within the communication range 93 and calculates the available range 92 for each frequency that can be used at the current position of the vehicle.
  • Patent Document 2 describes that information on a channel selected by a frequency allocation device is distributed to each base station and another communication system.
  • Patent Document 3 describes that the receiver may have a database that stores frequency use information indicating the usage, wireless power standards, and the like.
  • Patent Document 4 describes setting a frequency use prohibition range for prohibiting use in communication in a radio communication system based on the frequency channel use situation in a satellite mobile communication system.
  • a database that stores information (white space information) for identifying an area where the frequency is currently available.
  • information white space information
  • the database for managing the white space of the radio communication system including the mobile terminal (radio device) is an essential configuration, there is a problem that it is difficult to easily configure the radio communication system. .
  • the present invention has been made in view of such problems, and an object thereof is to provide a wireless communication system, a wireless device, a wireless communication method, and a wireless communication program that can be realized with a simple configuration.
  • the wireless communication system is a wireless communication system including a plurality of wireless devices, and the first wireless device that constitutes the wireless communication system is a wireless communication system that includes other wireless devices that constitute the wireless communication system.
  • a first information acquisition unit that acquires first information about the frequency usage status, and a second information that generates second information about frequency usage in an area where the wireless communication system exists based on the acquired first information
  • An information generation unit and a second information distribution unit that distributes the generated second information to a second wireless device that constitutes the wireless communication system.
  • a second information acquisition unit that acquires the second information from the wireless device, and a second information holding unit that holds the acquired second information.
  • a radio device is a radio device included in a plurality of radio devices constituting a radio communication system, and acquires first information relating to a frequency usage status of other radio devices constituting the radio communication system. Based on the first information acquisition unit, the acquired first information, a second information generation unit that generates second information related to frequency use in an area where the wireless communication system exists, and the generated second information A second information distribution unit that distributes information to a second wireless device that constitutes the wireless communication system.
  • a wireless device is a wireless device included in a plurality of wireless devices constituting a wireless communication system, and the first wireless device constituting the wireless communication system is another wireless device constituting the wireless communication system.
  • a second information acquisition unit configured to acquire, from the first wireless device, second information related to frequency usage in an area where the wireless communication system exists, generated based on the first information related to the frequency usage state of the wireless device; And a second information holding unit for holding the acquired second information.
  • the wireless communication method is a wireless communication method in a wireless communication system including a plurality of wireless devices, and the first wireless device configuring the wireless communication system is configured to configure the wireless communication system.
  • the first information regarding the frequency usage status of the radio device is acquired, and based on the acquired first information, second information regarding the frequency usage in the area where the wireless communication system exists is generated, and the generated Distributing second information to a second wireless device constituting the wireless communication system, wherein the second wireless device acquires the second information from the first wireless device, and acquires the acquired second information. Two types of information are retained.
  • a wireless communication method is a wireless communication method in a wireless device included in a plurality of wireless devices constituting a wireless communication system, and relates to a frequency usage situation of other wireless devices constituting the wireless communication system.
  • Information is generated, based on the acquired first information, second information related to frequency use in an area where the wireless communication system exists is generated, and the generated second information is used as the wireless communication system. Is distributed to the second wireless device constituting the.
  • the wireless communication method according to the present invention is a wireless communication method in a wireless device included in a plurality of wireless devices constituting a wireless communication system, wherein the first wireless device constituting the wireless communication system is the wireless communication system.
  • the second information on the frequency use in the area where the wireless communication system exists is generated from the first information on the frequency use status of the other radios constituting the radio from the first radio, The acquired second information is held.
  • a wireless communication program is a wireless communication program for causing a wireless device included in a plurality of wireless devices constituting a wireless communication system to execute, and uses a frequency of another wireless device constituting the wireless communication system First information on the situation is acquired, and based on the acquired first information, second information on frequency use in an area where the wireless communication system exists is generated, and the generated second information is The data is distributed to a second wireless device constituting the wireless communication system.
  • a wireless communication program is a wireless communication program for causing a wireless device included in a plurality of wireless devices constituting a wireless communication system to execute, and the first wireless device configuring the wireless communication system includes: Second information relating to frequency usage in an area where the wireless communication system exists, generated based on first information relating to frequency usage status of other wireless devices constituting the wireless communication system, is used as the first wireless device. And holds the acquired second information.
  • the present invention it is possible to provide a wireless communication system, a wireless device, a wireless communication method, and a wireless communication program that can be realized with a simple configuration.
  • FIG. 1 It is a flowchart which shows the operation
  • FIG. 1 It is a flowchart which shows the operation
  • FIG. 18 shows a schematic configuration of the wireless communication system according to the embodiment.
  • the wireless communication system according to the embodiment includes a plurality of wireless devices including a first wireless device 10 and a second wireless device 20.
  • the first wireless device 10 includes a first information acquisition unit 11, a second information generation unit 12, and a second information distribution unit.
  • the 1st information acquisition part 11 acquires the 1st information regarding the frequency utilization condition of the other radio
  • the second information generation unit 12 generates second information related to frequency use in an area where the wireless communication system exists based on the acquired first information.
  • the second information distribution unit 13 distributes the generated second information to the second wireless device 20 configuring the wireless communication system.
  • the second wireless device 20 includes a second information acquisition unit 21 and a second information holding unit 22.
  • the second information acquisition unit 21 acquires second information from the first wireless device 10.
  • the second information holding unit 22 holds the acquired second information.
  • the first wireless device configuring the wireless communication system generates the second information regarding the frequency usage based on the first information regarding the frequency usage status of the other wireless devices, and the second wireless device To be delivered to. Further, the second radio device acquires and holds the second information. This eliminates the need for a database such as a related technique, so that a radio communication system such as cognitive radio can be realized with a simple configuration.
  • the database is always fixed, and if the mobile terminal moves out of the communication range of the database or the database is damaged, the mobile terminal There is a problem that the frequency cannot be selected.
  • the wireless communication system may be configured as follows. That is, one first wireless device out of a plurality of wireless devices including a mobile terminal constituting a wireless communication system is in use of radio waves including the position and frequency of another wireless device different from the first wireless device. Based on the information collection means for collecting the information and the radio wave usage status information, the available frequency and transmission power value for each position in the area where the wireless communication system exists are calculated, and a database for frequency selection is created. Database construction means for construction and information delivery means for delivering database information to other wireless devices are provided. In addition, the other radio device includes information holding means for holding the notified database information and database construction means for constructing a database for frequency selection. The entire wireless communication system shares a database, and each wireless device includes parameter selection means for selecting usage parameters such as a frequency to be used and transmission power based on the shared database.
  • the information sharing method between wireless devices simplifies an algorithm for generating an information transmission path by narrowing down a wireless device that collects information on radio wave usage statuses of a plurality of wireless devices to a single wireless device. While avoiding duplication and lack of information, a database with the same content information is shared by radios throughout the system.
  • a series of operations for sharing a database between wireless devices is referred to as “information sharing”.
  • the embodiment it becomes possible to select a frequency to be individually used by all the radios constituting the radio communication system, and once a database is constructed, one radio is set to another radio or database. Even if it becomes a state where it cannot communicate with, the frequency to be used can be selected.
  • FIG. 1 shows a system configuration of a wireless communication system according to the first embodiment of the present invention.
  • the wireless communication system includes one first wireless device 1 and one or more second wireless devices 2. Further, the wireless communication system includes the first information 3 acquired by the first wireless device 1 from the second wireless device 2 and the second information distributed by the first wireless device 1 to the second wireless device 2. Information 4 is included.
  • the first wireless device 1 is a wireless device selected from a plurality of wireless devices constituting the wireless communication system.
  • the reference for selection of the first wireless device 1 at this time may be, for example, the wireless device located at the center of the plurality of wireless devices as the first wireless device 1.
  • the second wireless device 2 is a wireless device to which the first wireless device 1 is to distribute the second information 4.
  • the first wireless device 1 and the second wireless device 2 are wireless devices having the same configuration, one of them is a wireless device that distributes the second information 4, and the other is a wireless device that receives the second information 4. It is good also as a machine.
  • the first information 3 is information on radio wave usage including the current position of the radios constituting the radio communication system and the frequency being used.
  • the second information 4 is, for example, a set of first information 3 collected by the first wireless device 1 or a secondary for each position including a frequency generated based on the first information 3. Information about available parameters.
  • wireless devices other than the first wireless device 1 and the second wireless device 2 may exist.
  • information related to the use of its own radio wave may be included in the first information 3 held by the surrounding first wireless device 1 or the second wireless device 2.
  • FIG. 2 shows a block diagram of the internal configuration of the first radio device 1 and the second radio device 2 according to the present embodiment.
  • the first wireless device 1 includes a second information generation unit 10, a wireless communication unit 1-1, a first information holding unit 1-2, a second information holding unit 1-3, and a parameter selection unit. 1-4.
  • the second wireless device 2 includes a wireless communication unit 2-1, a first information holding unit 2-2, a second information holding unit 2-3, and a parameter selection unit 2-4.
  • the wireless communication unit 1-1 and the wireless communication unit 2-1, the first information holding unit 1-2 and the first information holding unit 2-2, the second information holding unit 1-3 and the second information holding unit 2 ⁇ 3, the parameter selection unit 1-4 and the parameter selection unit 2-4 may be devices having the same function and the same configuration.
  • the wireless communication unit 1-1 or 2-1 is a device that performs general signal processing and signal transmission / reception in order to realize wireless communication.
  • the wireless communication unit 1-1 or 2-1 is a wireless communication unit that performs cognitive wireless communication in white space, and information necessary for performing cognitive wireless communication (first information 3 and second information 4). It may be a transmission / reception unit for transmitting / receiving.
  • the wireless communication unit 1-1 is used as an acquisition unit that acquires the first information 3, a distribution unit that distributes the second information 4, and the wireless communication unit 2-1 notifies the first information 3.
  • a notification unit, an acquisition unit that acquires the second information 4, a transfer unit that transfers the first information 3 or the second information 4, and the like may be used.
  • the first information holding unit 1-2 or 2-2 is a storage medium for holding information on the radio wave usage status including the frequency and transmission power value used by its own radio device, that is, the first information 3. .
  • the second information generation unit 10 generates the second information 4 based on the first information 3 sent from the second radio 2 and the first information 3 of the first radio 1.
  • the second information generation unit 10 operates only in the first wireless device 1 in the wireless communication system according to the present embodiment, but the second wireless device 2 is used as a backup for the first wireless device 1 and the like.
  • the other radio device may have the second information generation unit 10.
  • the second information holding unit 1-3 or 2-3 is distributed to the second information 4 generated by the second information generation unit 10 and the first wireless device 1 to the second wireless device 2.
  • This is a storage medium that holds the second information 4.
  • the parameter selection unit (parameter calculation unit) 1-4 or 2-4 selects (calculates) the parameters (available parameters) including the optimum frequency and transmission power value to be used based on the second information 4
  • FIG. 3 shows an example of the contents of the first information 3 according to the present embodiment.
  • the first information 3 includes at least information related to the position of the wireless device and the frequency used, and the second information related to the approximate usable frequency for each position using these two pieces of information. 4 can be generated.
  • the more detailed second information 4 can be generated as information such as antenna gain, filter performance, terrain model, and the like is included in the first information 3.
  • FIG. 4 and 5 show examples of the contents of the second information 4 according to this embodiment.
  • (X, y), f, W, and f BW shown in FIG. 4 are the coordinate position of the transmission source radio of the first information 3, the frequency being used, the transmission power value being used, and the being used. Each means a bandwidth.
  • (x, y) shown in FIG. 5 means a coordinate position
  • f, W, and f BW are frequencies, transmission power values, and bandwidths (white space) that can be used at the position (x, y). ) Respectively.
  • the second information 4 in FIG. 4 is a set of first information 3 of each wireless device constituting the wireless communication system according to the present embodiment. Since the first information 3 is information on the parameters currently being used, and the second information 4 that is a set of them is information on the parameters currently being used in various places in the system, parameter selection for each radio
  • the unit 1-4 or 2-4 converts the acquired second information 4 into parameters such as a frequency that can be secondarily used by each wireless device.
  • the second information 4 in FIG. 5 is map information in which an area in which the wireless communication system according to the present embodiment is operated is divided into pixels having a certain area, and secondary usable parameters are described for each pixel. .
  • the first wireless device 1 generates and holds the second information 4 based on the first information 3 collected in the second information generation unit 10 and distributes the second information 4 to the second wireless device 2.
  • the second information 4 in FIG. 5 is a parameter such as a frequency that can be used secondarily at the time of distribution, and thus it is not necessary for each radio device to perform conversion.
  • parameter information usable at each point may be distributed in any format other than the map format.
  • the second information 4 in FIG. 5 describes characteristics such as the secondary usage priority of each parameter based on the request of each wireless device including the viewpoint of avoiding interference problems and the data transfer rate. Good. Further, information on the secondary usable parameters in pixels not included in the movement range of the second wireless device 2 may be omitted, and the information amount of the second information 4 in FIG. 5 may be reduced. That is, at least the available information (or in-use information) at the current position (or surrounding area) of the second wireless device 2 is set as the second information 4, and further, the available information within the movement range of the second wireless device 2. (Or in-use information) may be the second information 4.
  • FIG. 4 shows that the amount of information of the second information 4 to be transmitted is small, and the time taken to distribute the information of the second information 4 may be shorter than that of FIG. 5, whereas FIG. Since only 1 performs calculation processing such as interference power estimation, the processing amount of the entire system may be smaller than that of FIG.
  • the first wireless device 1 may be classified as the highest wireless device of the network, and the second wireless device 2 may be classified as a wireless device belonging to the lower network.
  • a plurality of second radio devices 2 may be classified into upper and lower levels to form a further hierarchy.
  • the second wireless device 2 includes the first information 3 held by the second wireless device 2, the second wireless device 2 in a layer lower than itself, or another wireless device constituting the wireless communication system.
  • the first information 3 notified from the device is notified to the second wireless device 2 or the first wireless device 1 belonging to the layer one higher than itself, and the first wireless device 1
  • the second information 4 is generated based on the first information 3 collected from the second radio 2, the second information 4 is retained, and the second information 4 is moved to a layer one level lower than itself.
  • the second wireless device 2 is the first wireless device 1 or the second wireless device 2 that is one higher than itself.
  • the second information 4 distributed from the network is stored individually or simultaneously to at least one second wireless device 2 belonging to a layer one level lower than itself. It may be.
  • FIG. 6 is a sequence chart showing the operation of the wireless communication system according to the first embodiment of the present invention.
  • the first wireless device 1 collects the first information 3 from the second wireless device 2 (S11).
  • the first wireless device 1 generates second information 4 based on the collected first information 3 (S12), and distributes the generated second information 4 to the second wireless device 2. (S13).
  • the first radio device 1 and the second radio device 2 select parameters to be used based on the acquired second information 4 (S14), and start communication at each position (S15).
  • FIG 7 and 8 show the operation flow of information sharing between the first wireless device 1 and the second wireless device 2 according to the present embodiment, respectively.
  • the first wireless device 1 determines whether or not a condition for starting information collection is satisfied. If the condition is satisfied, the process proceeds to S102 (S101).
  • the condition for starting the information collection may be, for example, when a certain radio device moves or when the frequency is switched. For example, a condition may be set when a certain period of time has elapsed, or when any of the use frequency, transmission power, and position of the first or second radio device has changed by a certain value or more.
  • the first wireless device 1 transmits a signal for requesting the first information 3 by the number of the second wireless devices 2 (S102 to S104).
  • the process proceeds to S108 (S105 to S107).
  • the first wireless device 1 generates the second information 4 by the second information generation unit 10 based on the collected first information 3 (S108), and holds it in the second information holding unit 1-3. (S109).
  • the collected first information 3 is combined to generate the second information 4 as shown in FIG. 4, and parameters that can be used at each point are obtained based on the collected first information 3. 2nd information 4 like this is produced
  • the wireless device 1 distributes the second information 4 to all the second wireless devices 2 that are notification destinations (S110 to S112).
  • the above description is a case where the first wireless device 1 unicasts the second information 4 to the second wireless device 2, but the first wireless device 1 transmits to the second wireless device 2. Then, the second information 4 may be broadcast. In that case, since the second information 4 is delivered to the plurality of second wireless devices 2 in a lump, S110 and S112 are omitted. Moreover, you may mix unicast and broadcast. In such a case, for example, an optimal transmission method is selected according to the situation, for example, in a normal state, information is broadcast all at once, and unicast is performed to the other party to which the information is to be reliably notified.
  • the second wireless device 2 determines whether or not a signal requesting the first information 3 has been received from the first wireless device 1, and if received, proceeds to S202 (S201).
  • the second wireless device 2 notifies the first wireless device 1 of the first information 3 stored in the first information holding unit 2-2 (S202).
  • the second radio 2 acquires the second information 4 from the first radio 1 (S203) and holds it in the second information holding unit 2-3 (S204).
  • FIG. 9 shows an operation flow after information sharing between the first wireless device 1 and the second wireless device 2 according to the present embodiment.
  • the first wireless device 1 and the second wireless device 2 each set the frequency and transmission power value based on the second information 4 held by itself.
  • the parameter to be used from now on is selected (S301).
  • an available parameter is obtained based on the parameter being used included in the second information 4
  • the parameter used by itself is selected from the obtained parameter.
  • the parameter used by itself is selected from the available parameters included in the second information 4.
  • the first wireless device 1 and the second wireless device 2 update the first information 3 stored in the first information holding units 1-2 and 2-2 to the usage parameter value selected in S301. (S302).
  • the first wireless device 1 and the second wireless device 2 may confirm whether or not the usage parameters selected for the other wireless devices may be used before and after S302.
  • the other wireless device inquires the use parameter of the first wireless device 1 or the second wireless device 2 that is accessible in the vicinity.
  • the first wireless device 1 and the second wireless device 2 that are accessible in the vicinity may actively notify the other wireless devices of the usage parameters.
  • the wireless devices constituting the wireless communication system form a plurality of hierarchical network groups
  • the second wireless device 2 belonging to the network group that is several steps lower and the first wireless device that is the highest When 1 performs communication data is transmitted and received by relaying the second wireless device 2 belonging to the network group in the middle layer.
  • the first wireless device 1 or the second wireless device 2 belonging to the network group between the groups is relayed to transmit / receive data. .
  • each wireless device optimizes parameters such as frequency and transmission power value by judging its own database according to the current position without accessing a database located elsewhere. It can be done.
  • the ratio between the interference power from the wireless device B received by the wireless device A and the noise power of the wireless device A that is, the interference power-to-noise power ratio (INR) is below a certain value. No information about the wireless device B is required.
  • FIG. 10 shows a system configuration of a wireless communication system according to the second embodiment of the present invention.
  • the wireless communication system is a second wireless device including a first wireless device 1, a second wireless device 5, and a second wireless device 6. 2 are provided. Further, the wireless communication system includes first information 3, second information 41 held by the second wireless device 5, and second information 42 held by the second wireless device 6. .
  • the second information 41 and the second information 42 are second information whose contents change based on the position of the second wireless device 5 and the second wireless device 6 and the distance between the wireless devices or the respective transmission power. It is an example of information 4.
  • FIG. 11 shows a block diagram of the internal configuration of the first wireless device 1, the second wireless device 5, and the second wireless device 6 according to the present embodiment.
  • the internal configuration of the first radio device 1 according to the second embodiment is obtained by adding a notification range calculation unit 11 to the internal configuration of the first radio device 1 according to the first embodiment.
  • the second radio device 5 holds the second information 41 in the second information holding unit 5-3
  • the second radio device 6 holds the second information 42 in the second information holding unit 6-3. To do.
  • the second information holding unit 1-3, the second information holding unit 5-3, the second information holding unit 6-3, the parameter selection unit 1-4, the parameter selection unit 5-4, and the parameter selection unit 6-4 Devices having the same function and the same configuration may be used.
  • the notification range calculation unit 11 is provided between the second radio device 5 and the second radio device 6 derived from the result of interference power estimation performed by the second information generation unit 10 based on the collected first information 3.
  • the second information 4 is converted into the second information 41 and the second information 42 in accordance with the interference amount or distance and the respective transmission power.
  • the ratio of the interference power received by the second radio device 5 from the second radio device 6 and the noise power in the second radio device 5, that is, the interference power to noise power ratio (INR) is a certain value or less, for example, 0 dB or less.
  • the parameters that can be used for the second radio device 5 do not depend on the radio wave usage status at the position of the second radio device 6. That is, the first information 3 of the second radio device 6 is not required when the second radio device 5 selects the use parameter. Therefore, in this case, the second information 41 becomes the second information 4 that is not based on the first information 3 of the second radio device 6. The same applies to the second information 42.
  • FIG. 12 and FIG. 13 show examples of the second information 41 and the second information 42 when the second radio device 5 and the second radio device 6 are separated from each other such that, for example, INR becomes 0 dB or less.
  • the second information 41 and the second information 42 shown in FIGS. 12 and 13 are a set of the first information 3 of each wireless device constituting the wireless communication system according to the present embodiment, as in FIG. .
  • the second information 41 does not include the first information 3 of the second wireless device 6 whose wireless device ID is b
  • the second information 42 includes the second information 41 whose wireless device ID is a. It is shown that the first information 3 of the wireless device 5 is not included.
  • the second information 41 and the second information 42 having the same contents as the second information 4 shown in FIG. 5 may be generated.
  • the second information 41 is not based on the first information 3 of the second radio device 6, and similarly, the second information 42 is based on the first information 3 of the second radio device 5. Absent.
  • FIG. 14 is a sequence chart showing the operation of the wireless communication system according to the second embodiment of the present invention.
  • the first wireless device 1 collects the first information 3 from the second wireless device 5 and the second wireless device 6 (S21).
  • the first wireless device 1 generates the second information 4 based on the collected first information 3 (S22), and the generated second information 4 is used as the second wireless device 5 and the second information 4.
  • the first wireless device 1 selects information (parameters) related to the second wireless device included in the second information based on the distance between the second wireless devices or the reach of the transmission radio wave.
  • the first wireless device 1 distributes the second information 41 to the second wireless device 5 and the second information 42 to the second wireless device 6 (S24). Finally, the first wireless device 1, the second wireless device 5, and the second wireless device 6 select parameters to be used based on the acquired second information 41 or second information 42 (S25). Then, communication is started at each position (S26).
  • the information sharing operation flow of the first wireless device 1 according to the second embodiment is based on the first information 3 by the notification range calculation unit 11 between S109 and S110 in the operation flow shown in FIG.
  • the second information 4 is converted into the second information 41 or converted into the second information 42.
  • the operation flow of the first wireless device 1 according to the other second embodiment is the same as the operation flow of the first embodiment.
  • FIG. 15 shows an example of the operation flow of the first wireless device 1 when converting the second information 4 into the second information 41 or the second information 42.
  • the first wireless device 1 selects one wireless device A from the second wireless devices 2 after S109 in FIG. 7 (S401).
  • the subsequent steps S403 and S404 are performed for the number of the second wireless devices 2 (S402 to S405).
  • the first wireless device 1 calculates INR, which is a ratio between the interference power received by the wireless device A from the other second wireless device 2 and the noise power of the wireless device A (S403), and based on the value,
  • the second information 4 is converted or updated (S404).
  • the radio wave information that does not interfere with the second radio 2 is deleted as shown in FIGS. 12 and 13, and the second information 4 as shown in FIG.
  • the available parameters are recalculated except for information on radio waves that do not interfere with the second wireless device 2. This is performed for all the second wireless devices 2, and the process proceeds to S110 in FIG.
  • the conversion or update of the second information 4 in S404 may be based on distance or transmission power value instead of INR.
  • the operation flow for information sharing between the second wireless device 5 and the second wireless device 6 according to the second embodiment is different only in the second information 4 to be acquired, and the second information device according to the first embodiment. This is the same as the operation flow of the wireless device 2.
  • the effect of the second embodiment is that, in addition to the effect of the first embodiment, the information amount of the second information 4 notified to the second radio 2 is reduced, so that the database in the radio communication system is reduced. The time required for sharing can be shortened.
  • a third embodiment of the present invention will be described with reference to FIGS.
  • radio wave interference that may occur when at least two or more wireless devices perform communication by switching to a new frequency almost simultaneously is avoided by spectrum sensing.
  • the system configuration of the wireless communication system according to the third embodiment is the same as the configuration of the first or second embodiment.
  • FIG. 16 shows a block diagram of the internal configuration of the first radio device 1 and the second radio device 2 according to the present embodiment.
  • the internal configuration of the first radio device 1 and the second radio device 2 of the third embodiment shown in FIG. 16 is the same as that of the first radio device 1 and the second radio device 2 according to the first embodiment.
  • a spectrum sensing unit 1-5 and a spectrum sensing unit 2-5 are added to the configuration.
  • the internal configuration of the first radio device 1 according to the third embodiment may be the one in which the spectrum sensing unit 1-5 is added to the internal configuration of the first radio device 1 according to the second embodiment.
  • the spectrum sensing unit 1-5 and the spectrum sensing unit 2-5 may be devices having the same function and the same configuration.
  • the first information 3 may include a spectrum sensing result. That is, the second wireless device 2 performs spectrum sensing by the spectrum sensing unit 2-5, generates the first information 3 based on the spectrum sensing result, and uses the generated first information 3 as the first wireless device. 1 may be notified.
  • the sequence between the radios according to the third embodiment is the same as that of the first and second embodiments shown in FIGS.
  • the operations of the first radio device 1 and the second radio device 2 according to the third embodiment are substantially the same as those in the first embodiment shown in FIGS.
  • the operation flow after information sharing between the first wireless device 1 and the second wireless device 2 according to the third embodiment is based on spectrum sensing between S301 and S302 in FIG. 9, as shown in FIG. This is added with the determination of the presence or absence of an interference source (S501).
  • the spectrum sensing unit 1-5 or the spectrum sensing unit 2-5 changes the use parameter including at least frequency information to be used based on the selected (calculated) available parameter, performs spectrum sensing, and executes spectrum sensing.
  • the sensing when there is a wireless device that is an interference source in the vicinity, the process returns to S301, and a parameter used to avoid interference is selected again.
  • the first wireless device 1 or the second wireless device 2 notifies the other wireless device of the application for use of the desired use frequency before reselecting (changing) the use parameter, and the desired use. It may be confirmed whether the frequency is available. On the other hand, when there is no wireless device serving as an interference source in the vicinity, the first information 3 is updated (S302), and communication is started.
  • the effect of the third embodiment is shorter than the application for using the selected parameter for the other radio device shown in the explanation of the operation of the first embodiment. Thus, it is possible to avoid radio wave interference between the wireless devices immediately after changing the use parameter.
  • Each configuration in the above-described embodiment is configured by hardware and / or software, and may be configured by one piece of hardware or software, or may be configured by a plurality of pieces of hardware or software.
  • Each function (each process) of the wireless device may be realized by a computer having a CPU, a memory, and the like.
  • a wireless communication program for performing the wireless communication method according to the embodiment may be stored in the storage device, and each function may be realized by executing the wireless communication program stored in the storage device by the CPU.
  • Non-transitory computer readable media include various types of tangible storage media (tangible storage medium). Examples of non-transitory computer-readable media include magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg magneto-optical discs), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable ROM), flash ROM, RAM (random access memory)) are included.
  • the program may also be supplied to the computer by various types of temporary computer-readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves.
  • the temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
  • a wireless communication system including a plurality of wireless devices, A first wireless device belonging to the wireless communication system, Different from the first wireless device, obtaining first information on the frequency usage status of at least one other wireless device belonging to the wireless communication system; Based on the first information, generate second information related to frequency use in the area where the wireless communication system exists, Holding the second information and distributing to at least one second radio among the other radios; The second wireless device holds the second information.
  • Wireless communication system including a plurality of wireless devices, A first wireless device belonging to the wireless communication system, Different from the first wireless device, obtaining first information on the frequency usage status of at least one other wireless device belonging to the wireless communication system; Based on the first information, generate second information related to frequency use in the area where the wireless communication system exists, Holding the second information and distributing to at least one second radio among the other radios; The second wireless device holds the second information.
  • Wireless communication system including a plurality of wireless devices, A first wireless device belonging to the wireless communication system, Different from the first wireless device, obtaining first information on the frequency usage status

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Abstract

This wireless communication system comprises a plurality of wireless devices. A first wireless device (10) is provided with: a first information acquisition unit (11) that acquires first information pertaining to the frequency utilization status of another wireless device; a second information generation unit (12) that generates second information pertaining to frequency utilization, on the basis of the acquired first information; and a second information distribution unit (13) that distributes the generated second information to a second wireless device. A second wireless device (20) is provided with a second information acquisition unit (21) that acquires the second information from the first wireless device (10), and a second information holding unit (22) that holds the acquired second information. Thus, a wireless communication system having a simple configuration can be realized.

Description

無線通信システム、無線機、無線通信方法及び非一時的なコンピュータ可読媒体Wireless communication system, wireless device, wireless communication method, and non-transitory computer-readable medium
　本発明は、無線通信を行う無線通信システム、無線機、無線通信方法及び無線通信プログラムに関する。 The present invention relates to a wireless communication system, a wireless device, a wireless communication method, and a wireless communication program that perform wireless communication.
　周波数の利用効率を高めるために、無線免許保持者によって地理的あるいは時間的に使用されていない周波数、いわゆるホワイトスペースを認識・認知して、一時的に使用するコグニティブ無線の研究が進められている。周波数の動的割り当て技術の一つとして、周辺の既存無線通信システムの周波数利用状況に関する情報と、位置・時間毎に利用可能な空き周波数を算出する機能を保有するデータベースを用いて、コグニティブ無線端末に動的に周波数を割り当てる周波数選択手法が提案されている。 In order to increase the frequency usage efficiency, research on cognitive radios that are temporarily used by recognizing and recognizing so-called white spaces that are not used geographically or temporally by radio license holders is underway. . As one of the dynamic frequency allocation techniques, a cognitive radio terminal is used by using a database having information on the frequency usage status of neighboring existing radio communication systems and a function of calculating available frequencies for each position and time. There has been proposed a frequency selection method for dynamically assigning frequencies.
　例えば、関連する技術として、図１９に示した特許文献１に記載の車両間通信向けコグニティブ無線システムのように、車両７１と車両間通信を行おうとしている車両７０がＧＰＳによって取得する車両７０の現在位置情報９０をデータベース８０に通知し、車両７０に対する割り当て周波数９１と割り当て周波数９１の利用可能範囲９２をデータベース８０から取得するといったものがある。このデータベース８０は、通信範囲９３内での既存の無線通信システムの周波数利用状況や地理に関する情報を保有し、車両の現在位置において利用可能な周波数ごとに利用可能範囲９２を算出する装置である。 For example, as a related technique, a vehicle 70 that is trying to perform vehicle-to-vehicle communication with a vehicle 71 such as a cognitive radio system for vehicle-to-vehicle communication described in Patent Document 1 shown in FIG. The current position information 90 is notified to the database 80, and the allocation frequency 91 for the vehicle 70 and the usable range 92 of the allocation frequency 91 are acquired from the database 80. The database 80 is a device that stores information on the frequency usage status and geography of the existing wireless communication system within the communication range 93 and calculates the available range 92 for each frequency that can be used at the current position of the vehicle.
　その他の関連する技術として、特許文献２には、周波数割当装置が選定したチャネルの情報を各基地局と他の通信システムに配信することが記載されている。特許文献３には、受信機が使用用途や無線電力規格などを示す周波数利用情報を記憶するデータベースを有してもよいことが記載されている。特許文献４には、衛星移動通信システムにおける周波数チャネル利用状況に基づいて、無線通信システムにおける通信に利用することを禁止する周波数利用禁止範囲を設定することが記載されている。 As another related technique, Patent Document 2 describes that information on a channel selected by a frequency allocation device is distributed to each base station and another communication system. Patent Document 3 describes that the receiver may have a database that stores frequency use information indicating the usage, wireless power standards, and the like. Patent Document 4 describes setting a frequency use prohibition range for prohibiting use in communication in a radio communication system based on the frequency channel use situation in a satellite mobile communication system.
国際公開第２０１３／０６９６８８号International Publication No. 2013/069688 国際公開第２０１０／０６４４３８号International Publication No. 2010/064438 特開２０１３－０９８８５４号公報JP 2013-098854 A 特開２００７－２５１９３５号公報JP 2007-251935 A
　しかしながら、例えば特許文献１に記載のような関連する技術では、種々の周波数について、現時点でその周波数が利用可能な領域を識別する情報（ホワイトスペース情報）を記憶するデータベース（データベース装置）を備えることが前提となっている。すなわち、関連する技術では、移動端末（無線機）を含む無線通信システムのホワイトスペースを管理するデータベースが必須の構成であるため、簡易に無線通信システムを構成することが困難であるという問題がある。 However, for example, in a related technique as described in Patent Document 1, for various frequencies, a database (database device) that stores information (white space information) for identifying an area where the frequency is currently available is provided. Is the premise. That is, in the related technology, since the database for managing the white space of the radio communication system including the mobile terminal (radio device) is an essential configuration, there is a problem that it is difficult to easily configure the radio communication system. .
　本発明は、このような課題に鑑み、簡易な構成で実現することが可能な無線通信システム、無線機、無線通信方法及び無線通信プログラムを提供することを目的としている。 The present invention has been made in view of such problems, and an object thereof is to provide a wireless communication system, a wireless device, a wireless communication method, and a wireless communication program that can be realized with a simple configuration.
　本発明に係る無線通信システムは、複数の無線機で構成される無線通信システムであって、前記無線通信システムを構成する第一の無線機は、前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を取得する第一情報取得部と、前記取得した第一の情報を基に、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を生成する第二情報生成部と、前記生成した第二の情報を、前記無線通信システムを構成する第二の無線機に配信する第二情報配信部と、を備え、前記第二の無線機は、前記第一の無線機から前記第二の情報を取得する第二情報取得部と、前記取得した第二情報を保持する第二情報保持部と、を備えるものである。 The wireless communication system according to the present invention is a wireless communication system including a plurality of wireless devices, and the first wireless device that constitutes the wireless communication system is a wireless communication system that includes other wireless devices that constitute the wireless communication system. A first information acquisition unit that acquires first information about the frequency usage status, and a second information that generates second information about frequency usage in an area where the wireless communication system exists based on the acquired first information An information generation unit; and a second information distribution unit that distributes the generated second information to a second wireless device that constitutes the wireless communication system. A second information acquisition unit that acquires the second information from the wireless device, and a second information holding unit that holds the acquired second information.
　本発明に係る無線機は、無線通信システムを構成する複数の無線機に含まれる無線機であって、前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を取得する第一情報取得部と、前記取得した第一の情報を基に、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を生成する第二情報生成部と、前記生成した第二の情報を、前記無線通信システムを構成する第二の無線機に配信する第二情報配信部と、を備えるものである。 A radio device according to the present invention is a radio device included in a plurality of radio devices constituting a radio communication system, and acquires first information relating to a frequency usage status of other radio devices constituting the radio communication system. Based on the first information acquisition unit, the acquired first information, a second information generation unit that generates second information related to frequency use in an area where the wireless communication system exists, and the generated second information A second information distribution unit that distributes information to a second wireless device that constitutes the wireless communication system.
　本発明に係る無線機は、無線通信システムを構成する複数の無線機に含まれる無線機であって、前記無線通信システムを構成する第一の無線機が、前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を基に生成した、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を、前記第一の無線機から取得する第二情報取得部と、前記取得した第二情報を保持する第二情報保持部と、を備えるものである。 A wireless device according to the present invention is a wireless device included in a plurality of wireless devices constituting a wireless communication system, and the first wireless device constituting the wireless communication system is another wireless device constituting the wireless communication system. A second information acquisition unit configured to acquire, from the first wireless device, second information related to frequency usage in an area where the wireless communication system exists, generated based on the first information related to the frequency usage state of the wireless device; And a second information holding unit for holding the acquired second information.
　本発明に係る無線通信方法は、複数の無線機で構成される無線通信システムにおける無線通信方法であって、前記無線通信システムを構成する第一の無線機は、前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を取得し、前記取得した第一の情報を基に、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を生成し、前記生成した第二の情報を、前記無線通信システムを構成する第二の無線機に配信し、前記第二の無線機は、前記第一の無線機から前記第二の情報を取得し、前記取得した第二情報を保持するものである。 The wireless communication method according to the present invention is a wireless communication method in a wireless communication system including a plurality of wireless devices, and the first wireless device configuring the wireless communication system is configured to configure the wireless communication system. The first information regarding the frequency usage status of the radio device is acquired, and based on the acquired first information, second information regarding the frequency usage in the area where the wireless communication system exists is generated, and the generated Distributing second information to a second wireless device constituting the wireless communication system, wherein the second wireless device acquires the second information from the first wireless device, and acquires the acquired second information. Two types of information are retained.
　本発明に係る無線通信方法は、無線通信システムを構成する複数の無線機に含まれる無線機における無線通信方法であって、前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を取得し、前記取得した第一の情報を基に、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を生成し、前記生成した第二の情報を、前記無線通信システムを構成する第二の無線機に配信するものである。 A wireless communication method according to the present invention is a wireless communication method in a wireless device included in a plurality of wireless devices constituting a wireless communication system, and relates to a frequency usage situation of other wireless devices constituting the wireless communication system. Information is generated, based on the acquired first information, second information related to frequency use in an area where the wireless communication system exists is generated, and the generated second information is used as the wireless communication system. Is distributed to the second wireless device constituting the.
　本発明に係る無線通信方法は、無線通信システムを構成する複数の無線機に含まれる無線機における無線通信方法であって、前記無線通信システムを構成する第一の無線機が、前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を基に生成した、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を、前記第一の無線機から取得し、前記取得した第二情報を保持するものである。 The wireless communication method according to the present invention is a wireless communication method in a wireless device included in a plurality of wireless devices constituting a wireless communication system, wherein the first wireless device constituting the wireless communication system is the wireless communication system. The second information on the frequency use in the area where the wireless communication system exists is generated from the first information on the frequency use status of the other radios constituting the radio from the first radio, The acquired second information is held.
　本発明に係る無線通信プログラムは、無線通信システムを構成する複数の無線機に含まれる無線機に実行させるための無線通信プログラムであって、前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を取得し、前記取得した第一の情報を基に、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を生成し、前記生成した第二の情報を、前記無線通信システムを構成する第二の無線機に配信するものである。 A wireless communication program according to the present invention is a wireless communication program for causing a wireless device included in a plurality of wireless devices constituting a wireless communication system to execute, and uses a frequency of another wireless device constituting the wireless communication system First information on the situation is acquired, and based on the acquired first information, second information on frequency use in an area where the wireless communication system exists is generated, and the generated second information is The data is distributed to a second wireless device constituting the wireless communication system.
　本発明に係る無線通信プログラムは、無線通信システムを構成する複数の無線機に含まれる無線機に実行させるための無線通信プログラムであって、前記無線通信システムを構成する第一の無線機が、前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を基に生成した、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を、前記第一の無線機から取得し、前記取得した第二情報を保持するものである。 A wireless communication program according to the present invention is a wireless communication program for causing a wireless device included in a plurality of wireless devices constituting a wireless communication system to execute, and the first wireless device configuring the wireless communication system includes: Second information relating to frequency usage in an area where the wireless communication system exists, generated based on first information relating to frequency usage status of other wireless devices constituting the wireless communication system, is used as the first wireless device. And holds the acquired second information.
　本発明によれば、簡易な構成で実現することが可能な無線通信システム、無線機、無線通信方法及び無線通信プログラムを提供することができる。 According to the present invention, it is possible to provide a wireless communication system, a wireless device, a wireless communication method, and a wireless communication program that can be realized with a simple configuration.
第１の実施形態に係る無線通信システムの構成を示すシステム構成図である。It is a system configuration figure showing the composition of the radio communications system concerning a 1st embodiment. 第１の実施形態に係る無線機の内部構成を示すブロック図である。It is a block diagram which shows the internal structure of the radio | wireless machine which concerns on 1st Embodiment. 第１の実施形態に係る無線機で使用する第一の情報の具体例を示す図である。It is a figure which shows the specific example of the 1st information used with the radio | wireless machine which concerns on 1st Embodiment. 第１の実施形態に係る無線機で使用する第二の情報の具体例を示す図である。It is a figure which shows the specific example of the 2nd information used with the radio | wireless machine which concerns on 1st Embodiment. 第１の実施形態に係る無線機で使用する第二の情報の他の具体例を示す図である。It is a figure which shows the other specific example of the 2nd information used with the radio | wireless machine which concerns on 1st Embodiment. 第１の実施形態に係る無線通信システムの動作を示すシーケンスチャートである。5 is a sequence chart showing an operation of the wireless communication system according to the first embodiment. 第１の実施形態に係る第一の無線機の情報共有動作を示すフローチャートである。It is a flowchart which shows the information sharing operation | movement of the 1st radio | wireless machine which concerns on 1st Embodiment. 第１の実施形態に係る第二の無線機の情報共有動作を示すフローチャートである。It is a flowchart which shows the information sharing operation | movement of the 2nd radio | wireless machine which concerns on 1st Embodiment. 第１の実施形態に係る第一の無線機および第二の無線機の情報共有後の動作を示すフローチャートである。It is a flowchart which shows the operation | movement after the information sharing of the 1st radio | wireless machine and 2nd radio | wireless machine which concern on 1st Embodiment. 第２の実施形態に係る無線通信システムの構成を示すシステム構成図である。It is a system configuration figure showing the composition of the radio communications system concerning a 2nd embodiment. 第２の実施形態に係る無線機の内部構成を示すブロック図である。It is a block diagram which shows the internal structure of the radio | wireless machine which concerns on 2nd Embodiment. 第２の実施形態に係る無線機で使用する第二の情報の具体例を示す図である。It is a figure which shows the specific example of the 2nd information used with the radio | wireless machine which concerns on 2nd Embodiment. 第２の実施形態に係る無線機で使用する第二の情報の具体例を示す図である。It is a figure which shows the specific example of the 2nd information used with the radio | wireless machine which concerns on 2nd Embodiment. 第２の実施形態に係る無線通信システムの動作を示すシーケンスチャートである。6 is a sequence chart showing an operation of the wireless communication system according to the second embodiment. 第２の実施形態に係る第一の無線機の第二の情報の変換動作を示すフローチャートである。It is a flowchart which shows the conversion operation | movement of the 2nd information of the 1st radio | wireless machine which concerns on 2nd Embodiment. 第３の実施形態に係る無線機の内部構成を示すブロック図である。It is a block diagram which shows the internal structure of the radio | wireless machine which concerns on 3rd Embodiment. 第３の実施形態に係る第一の無線機および第二の無線機の情報共有後の動作を示すフローチャートである。It is a flowchart which shows the operation | movement after information sharing of the 1st radio | wireless machine and 2nd radio | wireless machine which concern on 3rd Embodiment. 実施形態に係る無線通信システムの概要を示す構成図である。It is a block diagram which shows the outline | summary of the radio | wireless communications system which concerns on embodiment. 特許文献１に記載された関連する無線通信システムを示す図である。It is a figure which shows the related radio | wireless communications system described in patent document 1. FIG.
（実施形態の概要）
　実施形態の説明に先立って、実施形態の特徴についてその概要を説明する。図１８は、実施形態に係る無線通信システムの概略構成を示している。図１８に示すように、実施形態に係る無線通信システムは第一の無線機１０、第二の無線機２０を含む複数の無線機で構成されている。 (Outline of the embodiment)
Prior to the description of the embodiment, an outline of features of the embodiment will be described. FIG. 18 shows a schematic configuration of the wireless communication system according to the embodiment. As illustrated in FIG. 18, the wireless communication system according to the embodiment includes a plurality of wireless devices including a first wireless device 10 and a second wireless device 20.
　第一の無線機１０は、第一情報取得部１１、第二情報生成部１２、第二情報配信部を備えている。第一情報取得部１１は、無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を取得する。第二情報生成部１２は、取得した第一の情報を基に、無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を生成する。第二情報配信部１３は、生成した第二の情報を、無線通信システムを構成する第二の無線機２０に配信する。 The first wireless device 10 includes a first information acquisition unit 11, a second information generation unit 12, and a second information distribution unit. The 1st information acquisition part 11 acquires the 1st information regarding the frequency utilization condition of the other radio | wireless machine which comprises a radio | wireless communications system. The second information generation unit 12 generates second information related to frequency use in an area where the wireless communication system exists based on the acquired first information. The second information distribution unit 13 distributes the generated second information to the second wireless device 20 configuring the wireless communication system.
　第二の無線機２０は、第二情報取得部２１、第二情報保持部２２を備えている。第二情報取得部２１は、第一の無線機１０から第二の情報を取得する。第二情報保持部２２は、取得した第二情報を保持する。 The second wireless device 20 includes a second information acquisition unit 21 and a second information holding unit 22. The second information acquisition unit 21 acquires second information from the first wireless device 10. The second information holding unit 22 holds the acquired second information.
　このように、無線通信システムを構成する第一の無線機が、他の無線機の周波数利用状況に関する第一の情報に基づいて、周波数利用に関する第二の情報を生成し、第二の無線機に配信するようにした。さらに、第二の無線機では、第二の情報を取得し、保持するようにした。これにより、関連する技術のようなデータベースが不要となるため、簡易な構成でコグニティブ無線などの無線通信システムを実現することができる。 As described above, the first wireless device configuring the wireless communication system generates the second information regarding the frequency usage based on the first information regarding the frequency usage status of the other wireless devices, and the second wireless device To be delivered to. Further, the second radio device acquires and holds the second information. This eliminates the need for a database such as a related technique, so that a radio communication system such as cognitive radio can be realized with a simple configuration.
　上記のように、特許文献１に記載の関連する無線通信システムでは、データベースが常に固定的なものであり、移動端末がデータベースの通信範囲外に移動、または、データベースが損壊した場合、移動端末が周波数を選択することができなくなるという問題がある。 As described above, in the related wireless communication system described in Patent Document 1, the database is always fixed, and if the mobile terminal moves out of the communication range of the database or the database is damaged, the mobile terminal There is a problem that the frequency cannot be selected.
　なお、通信範囲外をカバーするためには、携帯基地局のセルのように通信範囲が重なるようデータベースを配置すればよいが、データベース設備を密に設置するためには設置コストなどの問題があり、また、密に設置できない場合、データベース通信範囲から外れてしまうエリアがなお存在し、移動端末が周波数を選択することができなくなる問題は残る。 In order to cover the outside of the communication range, it is only necessary to arrange the database so that the communication ranges overlap like a cell of a mobile base station, but there are problems such as installation cost in order to install the database equipment densely In addition, when it is not possible to install densely, there is still an area that falls outside the database communication range, and there remains a problem that the mobile terminal cannot select a frequency.
　このような課題を解決するため、例えば、実施形態に係る無線通信システムを次のように構成してもよい。すなわち、無線通信システムを構成する移動端末を含む複数の無線機のうち１つの第一の無線機が、第一の無線機とは異なる他の無線機の位置、周波数をはじめとした電波利用状況の情報を収集するための情報収集手段と、電波利用状況の情報を基に無線通信システムが存在するエリアにおいて位置毎の利用可能な周波数や送信電力値を算出し、周波数選択のためのデータベースを構築するためのデータベース構築手段と、他の無線機に対するデータベースの情報を配信する情報配信手段と、を備える。また、他の無線機が、通知されたデータベースの情報を保持する情報保持手段と、周波数選択のためのデータベースを構築するためのデータベース構築手段と、を備える。そして、無線通信システム全体でデータベースを共有し、各無線機が、共有したデータベースを基に、使用する周波数や送信電力をはじめとした利用パラメータを選択するためのパラメータ選択手段を備える。 In order to solve such a problem, for example, the wireless communication system according to the embodiment may be configured as follows. That is, one first wireless device out of a plurality of wireless devices including a mobile terminal constituting a wireless communication system is in use of radio waves including the position and frequency of another wireless device different from the first wireless device. Based on the information collection means for collecting the information and the radio wave usage status information, the available frequency and transmission power value for each position in the area where the wireless communication system exists are calculated, and a database for frequency selection is created. Database construction means for construction and information delivery means for delivering database information to other wireless devices are provided. In addition, the other radio device includes information holding means for holding the notified database information and database construction means for constructing a database for frequency selection. The entire wireless communication system shares a database, and each wireless device includes parameter selection means for selecting usage parameters such as a frequency to be used and transmission power based on the shared database.
　ここで、電波利用状況の情報の収集とデータベースの共有を行うために、情報共有専用の周波数（チャネル）を割り当てるか、または、データ通信用のチャネルにおいて情報共有のためのタイムスロットを割り当てるか、といった手段は問わない。 Here, in order to collect information on radio wave usage and share the database, assign a dedicated frequency (channel) for information sharing, or assign a time slot for information sharing in the data communication channel, There is no limitation on the means.
　実施形態に係る無線装置間情報共有法は、複数の無線機の電波利用状況に関する情報を収集する無線機を１つの無線機に絞ることで、情報伝達経路を生成するアルゴリズムを簡単にし、情報の重複や情報の不足を回避しつつ、同じ内容の情報をもったデータベースをシステム全体の無線機で共有する。以下では、データベースを無線機間で共有する一連の動作を「情報共有」と呼称する。 The information sharing method between wireless devices according to the embodiment simplifies an algorithm for generating an information transmission path by narrowing down a wireless device that collects information on radio wave usage statuses of a plurality of wireless devices to a single wireless device. While avoiding duplication and lack of information, a database with the same content information is shared by radios throughout the system. Hereinafter, a series of operations for sharing a database between wireless devices is referred to as “information sharing”.
　実施形態によれば、無線通信システムを構成する全無線機が個別に利用する周波数を選択することができるようになり、１度データベースを構築すると、ある１つの無線機が他の無線機またはデータベースと通信できない状態になっても、利用する周波数を選択することができるようになる。 According to the embodiment, it becomes possible to select a frequency to be individually used by all the radios constituting the radio communication system, and once a database is constructed, one radio is set to another radio or database. Even if it becomes a state where it cannot communicate with, the frequency to be used can be selected.
（第１の実施形態）
　本発明の第１の実施形態について図１から図９を参照して説明する。 (First embodiment)
A first embodiment of the present invention will be described with reference to FIGS.
［構成の説明］
　図１に本発明の第一の実施形態に係る無線通信システムのシステム構成を示す。図１に示すように、本無線通信システムは、１台の第一の無線機１と、１台以上の第二の無線機２とを備えている。さらに、本無線通信システムは、第一の無線機１が第二の無線機２から取得する第一の情報３と、第一の無線機１が第二の無線機２に配信する第二の情報４とを含んでいる。 [Description of configuration]
FIG. 1 shows a system configuration of a wireless communication system according to the first embodiment of the present invention. As shown in FIG. 1, the wireless communication system includes one first wireless device 1 and one or more second wireless devices 2. Further, the wireless communication system includes the first information 3 acquired by the first wireless device 1 from the second wireless device 2 and the second information distributed by the first wireless device 1 to the second wireless device 2. Information 4 is included.
　第一の無線機１とは、本無線通信システムを構成する複数の無線機のなかから選出される無線機のことである。このときの第一の無線機１の選出の基準は、たとえば、複数の無線機のなかで一番中央に位置している無線機を第一の無線機１とするなどとしてもよい。第二の無線機２とは、第一の無線機１が第二の情報４を配信する対象となる無線機のことである。例えば、第一の無線機１と第二の無線機２を同じ構成の無線機として、いずれか一方を第二の情報４を配信する無線機とし、他方を第二の情報４を受信する無線機としてもよい。 The first wireless device 1 is a wireless device selected from a plurality of wireless devices constituting the wireless communication system. The reference for selection of the first wireless device 1 at this time may be, for example, the wireless device located at the center of the plurality of wireless devices as the first wireless device 1. The second wireless device 2 is a wireless device to which the first wireless device 1 is to distribute the second information 4. For example, the first wireless device 1 and the second wireless device 2 are wireless devices having the same configuration, one of them is a wireless device that distributes the second information 4, and the other is a wireless device that receives the second information 4. It is good also as a machine.
　第一の情報３とは、本無線通信システムを構成する無線機の現在位置や利用中周波数をはじめとした電波利用に関する情報のことである。第二の情報４とは、たとえば、第一の無線機１が収集した第一の情報３の集合、または、第一の情報３を基に生成される周波数をはじめとした位置毎に二次利用可能なパラメータに関する情報のことである。 The first information 3 is information on radio wave usage including the current position of the radios constituting the radio communication system and the frequency being used. The second information 4 is, for example, a set of first information 3 collected by the first wireless device 1 or a secondary for each position including a frequency generated based on the first information 3. Information about available parameters.
　また、本発明の無線通信システムには、第一の無線機１と第二の無線機２以外の他の無線機が存在していても構わない。この場合、前記他の無線機とは、自身の電波利用に関する情報が周辺の第一の無線機１または第二の無線機２が保持する第一の情報３に含まれていてもよい。 Further, in the wireless communication system of the present invention, other wireless devices other than the first wireless device 1 and the second wireless device 2 may exist. In this case, with respect to the other wireless device, information related to the use of its own radio wave may be included in the first information 3 held by the surrounding first wireless device 1 or the second wireless device 2.
　図２に本実施形態に係る第一の無線機１と第二の無線機２の内部構成のブロック図を示す。図２に示すように、第一の無線機１は、第二情報生成部１０、無線通信部１－１、第一情報保持部１－２、第二情報保持部１－３、パラメータ選択部１－４を備えている。第二の無線機２は、無線通信部２－１、第一情報保持部２－２、第二情報保持部２－３、パラメータ選択部２－４を備えている。 FIG. 2 shows a block diagram of the internal configuration of the first radio device 1 and the second radio device 2 according to the present embodiment. As shown in FIG. 2, the first wireless device 1 includes a second information generation unit 10, a wireless communication unit 1-1, a first information holding unit 1-2, a second information holding unit 1-3, and a parameter selection unit. 1-4. The second wireless device 2 includes a wireless communication unit 2-1, a first information holding unit 2-2, a second information holding unit 2-3, and a parameter selection unit 2-4.
　ここで、無線通信部１－１と無線通信部２－１、第一情報保持部１－２と第一情報保持部２－２、第二情報保持部１－３と第二情報保持部２－３、パラメータ選択部１－４とパラメータ選択部２－４、はそれぞれ同じ機能、同じ構成の装置で構わない。 Here, the wireless communication unit 1-1 and the wireless communication unit 2-1, the first information holding unit 1-2 and the first information holding unit 2-2, the second information holding unit 1-3 and the second information holding unit 2 −3, the parameter selection unit 1-4 and the parameter selection unit 2-4 may be devices having the same function and the same configuration.
　無線通信部１－１または２－１は、無線通信を実現するために、一般的な信号処理と信号の送受信を行う装置である。無線通信部１－１または２－１は、ホワイトスペースでコグニティブ無線通信を行う無線通信部であるとともに、コグニティブ無線通信を行うために必要な情報（第一の情報３や第二の情報４）を送受信する送受信部であってもよい。例えば、無線通信部１－１を、第一の情報３を取得する取得部、第二の情報４を配信する配信部等とし、無線通信部２－１を、第一の情報３を通知する通知部、第二の情報４を取得する取得部、第一の情報３または第二の情報４を転送する転送部等としてもよい。なお、無線通信部１－１または２－１以外の通信手段を介して、コグニティブ無線通信を行うために必要な情報を送受信してもよい。第一情報保持部１－２または２－２は、自身の無線機が利用中の周波数や送信電力値をはじめとした電波利用状況の情報、つまり第一の情報３を保持する記憶媒体である。 The wireless communication unit 1-1 or 2-1 is a device that performs general signal processing and signal transmission / reception in order to realize wireless communication. The wireless communication unit 1-1 or 2-1 is a wireless communication unit that performs cognitive wireless communication in white space, and information necessary for performing cognitive wireless communication (first information 3 and second information 4). It may be a transmission / reception unit for transmitting / receiving. For example, the wireless communication unit 1-1 is used as an acquisition unit that acquires the first information 3, a distribution unit that distributes the second information 4, and the wireless communication unit 2-1 notifies the first information 3. A notification unit, an acquisition unit that acquires the second information 4, a transfer unit that transfers the first information 3 or the second information 4, and the like may be used. Information necessary for performing cognitive radio communication may be transmitted / received via a communication means other than the radio communication unit 1-1 or 2-1. The first information holding unit 1-2 or 2-2 is a storage medium for holding information on the radio wave usage status including the frequency and transmission power value used by its own radio device, that is, the first information 3. .
　第二情報生成部１０は、第二の無線機２から送られてきた第一の情報３と第一の無線機１の第一の情報３を基に第二の情報４を生成する演算処理装置である。また、第二情報生成部１０は、本実施形態に係る無線通信システム内において第一の無線機１のみにおいて稼働するが、第一の無線機１のバックアップとして第二の無線機２をはじめとした他の無線機が第二情報生成部１０を保有していても構わない。 The second information generation unit 10 generates the second information 4 based on the first information 3 sent from the second radio 2 and the first information 3 of the first radio 1. Device. The second information generation unit 10 operates only in the first wireless device 1 in the wireless communication system according to the present embodiment, but the second wireless device 2 is used as a backup for the first wireless device 1 and the like. The other radio device may have the second information generation unit 10.
　第二情報保持部１－３または２－３は、第二情報生成部１０で生成された第二の情報４、および、第一の無線機１から第二の無線機２に対して配信された第二の情報４を保持する記憶媒体である。パラメータ選択部（パラメータ算出部）１－４または２－４は、第二の情報４を基に利用する最適な周波数と送信電力値をはじめとしたパラメータ（利用可能パラメータ）を選択（算出）する演算処理装置である。 The second information holding unit 1-3 or 2-3 is distributed to the second information 4 generated by the second information generation unit 10 and the first wireless device 1 to the second wireless device 2. This is a storage medium that holds the second information 4. The parameter selection unit (parameter calculation unit) 1-4 or 2-4 selects (calculates) the parameters (available parameters) including the optimum frequency and transmission power value to be used based on the second information 4 An arithmetic processing unit.
　図３に本実施形態に係る第一の情報３の内容の例を示す。図３に示すように、第一の情報３には少なくとも、無線機の位置と利用周波数に関する情報が含まれており、この２つの情報で位置ごとのおおよその利用可能な周波数に関する第二の情報４の生成が可能になる。これに送信電力値の情報を加えることで、周波数ごとの電波到達範囲が分かり、さらに詳細な第二の情報４を生成することが可能になる。このように、アンテナ利得、フィルタ性能、地形モデル、等々といった情報を第一の情報３に含ませるほど、より詳細な第二の情報４を生成することが可能になる。 FIG. 3 shows an example of the contents of the first information 3 according to the present embodiment. As shown in FIG. 3, the first information 3 includes at least information related to the position of the wireless device and the frequency used, and the second information related to the approximate usable frequency for each position using these two pieces of information. 4 can be generated. By adding information on the transmission power value to this, it is possible to know the radio wave reachable range for each frequency, and to generate more detailed second information 4. Thus, the more detailed second information 4 can be generated as information such as antenna gain, filter performance, terrain model, and the like is included in the first information 3.
　図４と図５に本実施形態に係る第二の情報４の内容の例を示す。図４で示されている（ｘ、ｙ）、ｆ、Ｗ、ｆＢＷはそれぞれ第一の情報３の送信元の無線機の座標位置、利用中の周波数、利用中の送信電力値、利用中の帯域幅をそれぞれ意味している。一方、図５で示されている（ｘ、ｙ）は座標位置を意味し、ｆ、Ｗ、ｆＢＷは（ｘ、ｙ）の位置において利用可能な周波数、送信電力値、帯域幅（ホワイトスペース）をそれぞれ意味している。 4 and 5 show examples of the contents of the second information 4 according to this embodiment. (X, y), f, W, and f BW shown in FIG. 4 are the coordinate position of the transmission source radio of the first information 3, the frequency being used, the transmission power value being used, and the being used. Each means a bandwidth. On the other hand, (x, y) shown in FIG. 5 means a coordinate position, and f, W, and f BW are frequencies, transmission power values, and bandwidths (white space) that can be used at the position (x, y). ) Respectively.
　図４の第二の情報４は、本実施形態に係る無線通信システムを構成する各無線機の第一の情報３の集合である。第一の情報３は現在利用中のパラメータの情報であり、それらの集合体である第二の情報４はシステム内の各所において現在利用中のパラメータの情報であるため、各無線機のパラメータ選択部１－４または２－４は、取得したこの第二の情報４を基に各無線機にとって二次利用可能な周波数をはじめとしたパラメータに変換する。 The second information 4 in FIG. 4 is a set of first information 3 of each wireless device constituting the wireless communication system according to the present embodiment. Since the first information 3 is information on the parameters currently being used, and the second information 4 that is a set of them is information on the parameters currently being used in various places in the system, parameter selection for each radio The unit 1-4 or 2-4 converts the acquired second information 4 into parameters such as a frequency that can be secondarily used by each wireless device.
　図５の第二の情報４は、本実施形態に係る無線通信システムが稼働するエリアをある一定の面積のピクセルに分割し、二次利用可能なパラメータがピクセルごとに記載されるマップ情報である。第一の無線機１は、第二情報生成部１０において収集した第一の情報３を基に上記の第二の情報４を生成および保持し、第二の無線機２に配信する。図４とは異なり、図５の第二の情報４は、配信された時点で、二次利用可能な周波数をはじめとしたパラメータなので、各無線機が変換を行う必要はない。例えば、マップ形式以外の任意の形式により、各地点で利用可能なパラメータの情報を配信してもよい。 The second information 4 in FIG. 5 is map information in which an area in which the wireless communication system according to the present embodiment is operated is divided into pixels having a certain area, and secondary usable parameters are described for each pixel. . The first wireless device 1 generates and holds the second information 4 based on the first information 3 collected in the second information generation unit 10 and distributes the second information 4 to the second wireless device 2. Unlike FIG. 4, the second information 4 in FIG. 5 is a parameter such as a frequency that can be used secondarily at the time of distribution, and thus it is not necessary for each radio device to perform conversion. For example, parameter information usable at each point may be distributed in any format other than the map format.
　なお、図５の第二の情報４には、干渉問題回避の観点やデータ転送速度をはじめとした各無線機の要求に基づいた各パラメータの二次利用優先順位などの特徴が記載されてもよい。また、第二の無線機２の移動範囲に含まれないピクセルにおける二次利用可能なパラメータの情報を省略し、図５の第二の情報４の情報量を削減して構わない。すなわち、少なくとも第二の無線機２の現在の位置（または周辺）における利用可能情報（または利用中情報）を第二の情報４とし、さらに、第二の無線機２の移動範囲における利用可能情報（または利用中情報）を第二の情報４としてもよい。 Note that the second information 4 in FIG. 5 describes characteristics such as the secondary usage priority of each parameter based on the request of each wireless device including the viewpoint of avoiding interference problems and the data transfer rate. Good. Further, information on the secondary usable parameters in pixels not included in the movement range of the second wireless device 2 may be omitted, and the information amount of the second information 4 in FIG. 5 may be reduced. That is, at least the available information (or in-use information) at the current position (or surrounding area) of the second wireless device 2 is set as the second information 4, and further, the available information within the movement range of the second wireless device 2. (Or in-use information) may be the second information 4.
　図４は送信する第二の情報４の情報量が少量になり、第二の情報４の情報配信にかかる時間が図５よりも短くてよいのに対して、図５は第一の無線機１のみが干渉電力推定をはじめとした演算処理を行うため、図４よりもシステム全体の処理量が少量でよい。 FIG. 4 shows that the amount of information of the second information 4 to be transmitted is small, and the time taken to distribute the information of the second information 4 may be shorter than that of FIG. 5, whereas FIG. Since only 1 performs calculation processing such as interference power estimation, the processing amount of the entire system may be smaller than that of FIG.
　第二の無線機２が２台以上存在するとき、効率的な情報伝達を行うため、複数の無線機がネットワーク的に階層分けされた複数のグループを構成する場合がある。このとき、たとえば、第一の無線機１をネットワークの最上位の無線機として、第二の無線機２は、その下位のネットワークに属する無線機として仕分けして構わない。また、第二の無線機２が多く存在する場合、複数の第二の無線機２を上位、下位と仕分けしてさらなる階層を構成してもよい。例えば、第二の無線機２は、第二の無線機２が保持する第一の情報３と、自身より下位の層の第二の無線機２、または、無線通信システムを構成する他の無線機から通知された第一の情報３と、を自身より１つ上位の層に属する第二の無線機２、または、第一の無線機１に対して通知し、第一の無線機１は、第二の無線機２から収集した第一の情報３を基に第二の情報４を生成し、第二の情報４を保持し、第二の情報４を自身より１つ下位の層に属する少なくとも１台以上の第二の無線機２に対して個別または一斉配信し、第二の無線機２は、第一の無線機１、または、自身より１つ上位の第二の無線機２から配信された第二の情報４を保持し、自身より１つ下位の層に属する少なくとも１台以上の第二の無線機２に対して個別または一斉配信してもよい。 When there are two or more second wireless devices 2, there are cases where a plurality of wireless devices constitute a plurality of groups divided into layers in order to efficiently transmit information. At this time, for example, the first wireless device 1 may be classified as the highest wireless device of the network, and the second wireless device 2 may be classified as a wireless device belonging to the lower network. In addition, when there are many second radio devices 2, a plurality of second radio devices 2 may be classified into upper and lower levels to form a further hierarchy. For example, the second wireless device 2 includes the first information 3 held by the second wireless device 2, the second wireless device 2 in a layer lower than itself, or another wireless device constituting the wireless communication system. The first information 3 notified from the device is notified to the second wireless device 2 or the first wireless device 1 belonging to the layer one higher than itself, and the first wireless device 1 The second information 4 is generated based on the first information 3 collected from the second radio 2, the second information 4 is retained, and the second information 4 is moved to a layer one level lower than itself. Distribute individually or simultaneously to at least one or more second wireless devices 2 to which the second wireless device 2 belongs. The second wireless device 2 is the first wireless device 1 or the second wireless device 2 that is one higher than itself. The second information 4 distributed from the network is stored individually or simultaneously to at least one second wireless device 2 belonging to a layer one level lower than itself. It may be.
［動作の説明］
　図６は本発明の第１の実施形態に係る無線通信システムの動作を示すシーケンスチャートである。図６に示すように、まず、第一の無線機１は、第二の無線機２から第一の情報３を収集する（Ｓ１１）。次に、第一の無線機１は、収集した第一の情報３を基に第二の情報４を生成し（Ｓ１２）、生成した第二の情報４を第二の無線機２に配信する（Ｓ１３）。最後に、第一の無線機１および第二の無線機２は、取得した第二の情報４を基に利用するパラメータを選択し（Ｓ１４）、各位置において通信を開始する（Ｓ１５）。 [Description of operation]
FIG. 6 is a sequence chart showing the operation of the wireless communication system according to the first embodiment of the present invention. As shown in FIG. 6, first, the first wireless device 1 collects the first information 3 from the second wireless device 2 (S11). Next, the first wireless device 1 generates second information 4 based on the collected first information 3 (S12), and distributes the generated second information 4 to the second wireless device 2. (S13). Finally, the first radio device 1 and the second radio device 2 select parameters to be used based on the acquired second information 4 (S14), and start communication at each position (S15).
　図７及び図８に本実施形態に係る第一の無線機１と第二の無線機２の情報共有の動作フローをそれぞれ示す。 7 and 8 show the operation flow of information sharing between the first wireless device 1 and the second wireless device 2 according to the present embodiment, respectively.
　まず、第一の無線機１の動作について説明する。最初に、第一の無線機１は、情報収集を開始するための条件を満たしたか否かを判定し、条件を満たしていればＳ１０２に進む（Ｓ１０１）。なお、情報収集を開始するための条件は、たとえば、ある無線機が移動したときや周波数を切り替えたときとして構わない。例えば、一定時間が経過した場合、または、第一または第二の無線機の利用周波数、送信電力、位置のいずれかに一定値以上の変更があった場合を条件としてもよい。 First, the operation of the first wireless device 1 will be described. First, the first wireless device 1 determines whether or not a condition for starting information collection is satisfied. If the condition is satisfied, the process proceeds to S102 (S101). The condition for starting the information collection may be, for example, when a certain radio device moves or when the frequency is switched. For example, a condition may be set when a certain period of time has elapsed, or when any of the use frequency, transmission power, and position of the first or second radio device has changed by a certain value or more.
　次に、第一の無線機１は、第二の無線機２の数分だけ第一の情報３を要求するための信号を送信する（Ｓ１０２～Ｓ１０４）。次に、第一の無線機１は、要求信号を受信した第二の無線機２全てから第一の情報３を収集するとＳ１０８に進む（Ｓ１０５～Ｓ１０７）。 Next, the first wireless device 1 transmits a signal for requesting the first information 3 by the number of the second wireless devices 2 (S102 to S104). Next, when the first wireless device 1 collects the first information 3 from all the second wireless devices 2 that have received the request signal, the process proceeds to S108 (S105 to S107).
　次に、第一の無線機１は、収集した第一の情報３を基に第二情報生成部１０で第二の情報４を生成し（Ｓ１０８）、第二情報保持部１－３に保持する（Ｓ１０９）。例えば、収集した第一の情報３を結合して図４のような第二の情報４を生成し、また、収集した第一の情報３に基づき各地点で利用可能なパラメータを求めて図５のような第二の情報４を生成する。最後に、第一に無線機１は通知先である第二の無線機２全てに対して第二の情報４を配信する（Ｓ１１０～Ｓ１１２）。 Next, the first wireless device 1 generates the second information 4 by the second information generation unit 10 based on the collected first information 3 (S108), and holds it in the second information holding unit 1-3. (S109). For example, the collected first information 3 is combined to generate the second information 4 as shown in FIG. 4, and parameters that can be used at each point are obtained based on the collected first information 3. 2nd information 4 like this is produced | generated. Finally, firstly, the wireless device 1 distributes the second information 4 to all the second wireless devices 2 that are notification destinations (S110 to S112).
　上記の説明は、第一の無線機１が第二の無線機２に対して第二の情報４をユニキャストした場合であるが、第一の無線機１が第二の無線機２に対して第二の情報４をブロードキャストしてもよい。その場合、複数の第二の無線機２に対して第二の情報４が一括で配信されるため、Ｓ１１０とＳ１１２は省略される。また、ユニキャストとブロードキャストを交えてもよい。その場合、たとえば、通常時はブロードキャストにより情報を一斉配信しつつ、確実に情報を通知したい相手に対してはユニキャストするといったように、状況に合わせて最適な送信方法を選択する。 The above description is a case where the first wireless device 1 unicasts the second information 4 to the second wireless device 2, but the first wireless device 1 transmits to the second wireless device 2. Then, the second information 4 may be broadcast. In that case, since the second information 4 is delivered to the plurality of second wireless devices 2 in a lump, S110 and S112 are omitted. Moreover, you may mix unicast and broadcast. In such a case, for example, an optimal transmission method is selected according to the situation, for example, in a normal state, information is broadcast all at once, and unicast is performed to the other party to which the information is to be reliably notified.
　次に、第二の無線機２の動作について説明する。最初に、第二の無線機２は、第一の無線機１から第一の情報３を要求する信号を受信したか否かを判定し、受信した場合、Ｓ２０２に進む（Ｓ２０１）。次に、第二の無線機２は第一情報保持部２－２に格納している第一の情報３を第一の無線機１に対して通知する（Ｓ２０２）。最後に、第二の無線機２は第一の無線機１から第二の情報４を取得し（Ｓ２０３）、第二情報保持部２－３に保持する（Ｓ２０４）。 Next, the operation of the second radio 2 will be described. First, the second wireless device 2 determines whether or not a signal requesting the first information 3 has been received from the first wireless device 1, and if received, proceeds to S202 (S201). Next, the second wireless device 2 notifies the first wireless device 1 of the first information 3 stored in the first information holding unit 2-2 (S202). Finally, the second radio 2 acquires the second information 4 from the first radio 1 (S203) and holds it in the second information holding unit 2-3 (S204).
　図９に本実施形態に係る第一の無線機１および第二の無線機２の情報共有後の動作フローを示す。図７及び図８に示した情報共有後、まず、第一の無線機１と第二の無線機２は、それぞれ自身が保持している第二の情報４を基に周波数や送信電力値をはじめとしたこれから利用するパラメータを選択する（Ｓ３０１）。図４のような第二の情報４の場合、第二の情報４に含まれる利用中のパラメータに基づいて利用可能なパラメータを求め、その中から自身が利用するパラメータを選択する。図５のような第二の情報４の場合、第二の情報４に含まれる利用可能なパラメータの中から自身が利用するパラメータを選択する。 FIG. 9 shows an operation flow after information sharing between the first wireless device 1 and the second wireless device 2 according to the present embodiment. After the information sharing shown in FIG. 7 and FIG. 8, first, the first wireless device 1 and the second wireless device 2 each set the frequency and transmission power value based on the second information 4 held by itself. The parameter to be used from now on is selected (S301). In the case of the second information 4 as shown in FIG. 4, an available parameter is obtained based on the parameter being used included in the second information 4, and the parameter used by itself is selected from the obtained parameter. In the case of the second information 4 as shown in FIG. 5, the parameter used by itself is selected from the available parameters included in the second information 4.
　次に、第一の無線機１および第二の無線機２は、第一情報保持部１－２および２－２に格納されている第一の情報３をＳ３０１で選択した利用パラメータ値に更新する（Ｓ３０２）。なお、第一の無線機１および第二の無線機２は、Ｓ３０２の前後に、他の無線機に対して選択した利用パラメータを利用しても構わないか確認してもよい。 Next, the first wireless device 1 and the second wireless device 2 update the first information 3 stored in the first information holding units 1-2 and 2-2 to the usage parameter value selected in S301. (S302). The first wireless device 1 and the second wireless device 2 may confirm whether or not the usage parameters selected for the other wireless devices may be used before and after S302.
　第二の情報４を保持しない他の無線機がいる場合、前記他の無線機は、周辺のアクセス可能な第一の無線機１または第二の無線機２に利用パラメータを問い合わせる。または、周辺のアクセス可能な第一の無線機１と第二の無線機２が能動的に前記他の無線機に対して利用パラメータを通知してもよい。 When there is another wireless device that does not hold the second information 4, the other wireless device inquires the use parameter of the first wireless device 1 or the second wireless device 2 that is accessible in the vicinity. Alternatively, the first wireless device 1 and the second wireless device 2 that are accessible in the vicinity may actively notify the other wireless devices of the usage parameters.
　本実施形態に係る無線通信システムを構成する無線機が、階層的なネットワークグループを複数組んだ場合、数段下位のネットワークグループに属する第二の無線機２と最上位である第一の無線機１が通信を行うときは途中の階層のネットワークグループに属する第二の無線機２を中継してデータの送受信を行う。また、ネットワーク的に離れた第二の無線機２同士が通信を行うときはグループ間にいるネットワークグループに属する第一の無線機１または第二の無線機２を中継してデータの送受信を行う。 When the wireless devices constituting the wireless communication system according to the present embodiment form a plurality of hierarchical network groups, the second wireless device 2 belonging to the network group that is several steps lower and the first wireless device that is the highest When 1 performs communication, data is transmitted and received by relaying the second wireless device 2 belonging to the network group in the middle layer. When the second wireless devices 2 separated from each other in the network communicate with each other, the first wireless device 1 or the second wireless device 2 belonging to the network group between the groups is relayed to transmit / receive data. .
［効果］
　第１の実施形態の効果は、各無線機が、他所に配置されているデータベースにアクセスすることなく周波数や送信電力値をはじめとしたパラメータを現在位置に応じて自身のデータベースの判断で最適化できることである。 [effect]
The effect of the first embodiment is that each wireless device optimizes parameters such as frequency and transmission power value by judging its own database according to the current position without accessing a database located elsewhere. It can be done.
（第２の実施形態）
　本発明の第２の実施形態について図１０から図１５を参照して説明する。第２の実施形態では、無線機Ａが受信する無線機Ｂからの干渉電力と無線機Ａの雑音電力の比、つまり干渉電力対雑音電力比（ＩＮＲ：Interference to Noise Ratio）が一定値以下になるような無線機Ｂに関する情報を必要としない。 (Second Embodiment)
A second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the ratio between the interference power from the wireless device B received by the wireless device A and the noise power of the wireless device A, that is, the interference power-to-noise power ratio (INR) is below a certain value. No information about the wireless device B is required.
［構成の説明］
　図１０に本発明の第２の実施形態に係る無線通信システムのシステム構成を示す。図１０に示すように、第二の実施形態では、無線通信システムは、１台の第一の無線機１と、第二の無線機５と第二の無線機６を含む第二の無線機２とを備えている。さらに、本無線通信システムは、第一の情報３と、第二の無線機５が保持する第二の情報４１と、第二の無線機６が保持する第二の情報４２とを含んでいる。 [Description of configuration]
FIG. 10 shows a system configuration of a wireless communication system according to the second embodiment of the present invention. As shown in FIG. 10, in the second embodiment, the wireless communication system is a second wireless device including a first wireless device 1, a second wireless device 5, and a second wireless device 6. 2 are provided. Further, the wireless communication system includes first information 3, second information 41 held by the second wireless device 5, and second information 42 held by the second wireless device 6. .
　なお、第二の情報４１および第二の情報４２は、第二の無線機５と第二無線機６の位置と無線機間の距離またはそれぞれの送信電力に基づいて内容が変化する第二の情報４の一例である。 Note that the second information 41 and the second information 42 are second information whose contents change based on the position of the second wireless device 5 and the second wireless device 6 and the distance between the wireless devices or the respective transmission power. It is an example of information 4.
　図１１に本実施形態に係る第一の無線機１と第二の無線機５と第二の無線機６の内部構成のブロック図を示す。図１１に示すように、第２の実施形態に係る第一の無線機１の内部構成は、第１の実施形態に係る第一の無線機１の内部構成に通知範囲算出部１１を追加したものである。第二の無線機５は、第二の情報４１を第二情報保持部５－３に保持し、第二の無線機６は、第二の情報４２を第二情報保持部６－３に保持する。 FIG. 11 shows a block diagram of the internal configuration of the first wireless device 1, the second wireless device 5, and the second wireless device 6 according to the present embodiment. As shown in FIG. 11, the internal configuration of the first radio device 1 according to the second embodiment is obtained by adding a notification range calculation unit 11 to the internal configuration of the first radio device 1 according to the first embodiment. Is. The second radio device 5 holds the second information 41 in the second information holding unit 5-3, and the second radio device 6 holds the second information 42 in the second information holding unit 6-3. To do.
　ここで、無線通信部１－１と無線通信部５－１と無線通信部６－１、第一情報保持部１－２と第一情報保持部５－２と第一情報保持部６－２、第二情報保持部１－３と第二情報保持部５－３と第二情報保持部６－３、パラメータ選択部１－４とパラメータ選択部５－４とパラメータ選択部６－４、はそれぞれ同じ機能、同じ構成の装置で構わない。 Here, the wireless communication unit 1-1, the wireless communication unit 5-1, the wireless communication unit 6-1, the first information holding unit 1-2, the first information holding unit 5-2, and the first information holding unit 6-2. The second information holding unit 1-3, the second information holding unit 5-3, the second information holding unit 6-3, the parameter selection unit 1-4, the parameter selection unit 5-4, and the parameter selection unit 6-4 Devices having the same function and the same configuration may be used.
　通知範囲算出部１１は、収集した第一の情報３を基に第二情報生成部１０で行われる干渉電力推定の結果から導出される第二の無線機５と第二の無線機６の間の干渉量または距離やそれぞれの送信電力にしたがって第二の情報４を第二の情報４１および第二の情報４２に変換する装置である。 The notification range calculation unit 11 is provided between the second radio device 5 and the second radio device 6 derived from the result of interference power estimation performed by the second information generation unit 10 based on the collected first information 3. The second information 4 is converted into the second information 41 and the second information 42 in accordance with the interference amount or distance and the respective transmission power.
　次に、第二の情報４１および第二の情報４２について説明する。第二の無線機５が第二の無線機６から受ける干渉電力と第二の無線機５内の雑音電力の比、つまり干渉電力対雑音電力比（ＩＮＲ）が一定値以下、たとえば、０ｄＢ以下になる場合、第二の無線機５にとって利用可能なパラメータは第二の無線機６の位置における電波利用状況に依存しない。つまり、第二の無線機５が利用パラメータを選択する際に、第二の無線機６の第一の情報３を必要としない。したがって、この場合、第二の情報４１は第二の無線機６の第一の情報３に基づかない第二の情報４になる。ななお、第二の情報４２についても同様である。 Next, the second information 41 and the second information 42 will be described. The ratio of the interference power received by the second radio device 5 from the second radio device 6 and the noise power in the second radio device 5, that is, the interference power to noise power ratio (INR) is a certain value or less, for example, 0 dB or less. In this case, the parameters that can be used for the second radio device 5 do not depend on the radio wave usage status at the position of the second radio device 6. That is, the first information 3 of the second radio device 6 is not required when the second radio device 5 selects the use parameter. Therefore, in this case, the second information 41 becomes the second information 4 that is not based on the first information 3 of the second radio device 6. The same applies to the second information 42.
　図１２及び図１３に、たとえばＩＮＲが０ｄＢ以下になるほど第二の無線機５と第二の無線機６が互いに離れているときの、第二の情報４１および第二の情報４２の例を示す。図１２及び１３に示した第二の情報４１および第二の情報４２は、図４と同様に、本実施形態に係る無線通信システムを構成する各無線機の第一の情報３の集合である。ただし、第二の情報４１には、無線機ＩＤがｂである第二の無線機６の第一の情報３は含まれず、第二の情報４２には、無線機ＩＤがａである第二の無線機５の第一の情報３は含まれない様子が示されている。 FIG. 12 and FIG. 13 show examples of the second information 41 and the second information 42 when the second radio device 5 and the second radio device 6 are separated from each other such that, for example, INR becomes 0 dB or less. . The second information 41 and the second information 42 shown in FIGS. 12 and 13 are a set of the first information 3 of each wireless device constituting the wireless communication system according to the present embodiment, as in FIG. . However, the second information 41 does not include the first information 3 of the second wireless device 6 whose wireless device ID is b, and the second information 42 includes the second information 41 whose wireless device ID is a. It is shown that the first information 3 of the wireless device 5 is not included.
　また、図５に示した第二の情報４と同様の内容の第二の情報４１および第二の情報４２が生成されても構わない。その場合、第二の情報４１は第二の無線機６の第一の情報３に基づいておらず、同様に、第二の情報４２は第二の無線機５の第一の情報３に基づかない。 Further, the second information 41 and the second information 42 having the same contents as the second information 4 shown in FIG. 5 may be generated. In that case, the second information 41 is not based on the first information 3 of the second radio device 6, and similarly, the second information 42 is based on the first information 3 of the second radio device 5. Absent.
［動作の説明］
　図１４は本発明の第２の実施形態に係る無線通信システムの動作を示すシーケンスチャートである。図１４に示すように、まず、第一の無線機１は、第二の無線機５と第二の無線機６から第一の情報３を収集する（Ｓ２１）。次に、第一の無線機１は、収集した第一の情報３を基に第二の情報４を生成し（Ｓ２２）、生成した第二の情報４を第二の無線機５と第二の無線機６のそれぞれのために第二の情報４１及び４２に変換する（Ｓ２３）。例えば、第一の無線機１は、第二の無線機間の距離または送信電波の到達範囲に基づいて、第二の情報に含まれる第二の無線機に関する情報（パラメータ）を選択する。さらに、第一の無線機１は、第二の情報４１を第二の無線機５に、第二の情報４２を第二の無線機６に配信する（Ｓ２４）。最後に、第一の無線機１、第二の無線機５および第二の無線機６は、取得した第二の情報４１または第二の情報４２を基に利用するパラメータを選択し（Ｓ２５）、各位置において通信を開始する（Ｓ２６）。 [Description of operation]
FIG. 14 is a sequence chart showing the operation of the wireless communication system according to the second embodiment of the present invention. As shown in FIG. 14, first, the first wireless device 1 collects the first information 3 from the second wireless device 5 and the second wireless device 6 (S21). Next, the first wireless device 1 generates the second information 4 based on the collected first information 3 (S22), and the generated second information 4 is used as the second wireless device 5 and the second information 4. Is converted into second information 41 and 42 for each of the wireless devices 6 (S23). For example, the first wireless device 1 selects information (parameters) related to the second wireless device included in the second information based on the distance between the second wireless devices or the reach of the transmission radio wave. Further, the first wireless device 1 distributes the second information 41 to the second wireless device 5 and the second information 42 to the second wireless device 6 (S24). Finally, the first wireless device 1, the second wireless device 5, and the second wireless device 6 select parameters to be used based on the acquired second information 41 or second information 42 (S25). Then, communication is started at each position (S26).
　第２の実施形態に係る第一の無線機１の情報共有の動作フローは、図７に示した動作フロー内のＳ１０９とＳ１１０の間に、通知範囲算出部１１で第一の情報３を基に第二の情報４を第二の情報４１に変換または第二の情報４２に変換するステップが入る。その他の第２の実施形態に係る第一の無線機１の動作フローは第１の実施形態の動作フローと同様である。 The information sharing operation flow of the first wireless device 1 according to the second embodiment is based on the first information 3 by the notification range calculation unit 11 between S109 and S110 in the operation flow shown in FIG. The second information 4 is converted into the second information 41 or converted into the second information 42. The operation flow of the first wireless device 1 according to the other second embodiment is the same as the operation flow of the first embodiment.
　第二の情報４を第二の情報４１または第二の情報４２に変換する際の、第一の無線機１の動作フロー例を図１５に示す。第一の無線機１は、図７におけるＳ１０９の後、第二の無線機２の中から１つの無線機Ａを選出する（Ｓ４０１）。 FIG. 15 shows an example of the operation flow of the first wireless device 1 when converting the second information 4 into the second information 41 or the second information 42. The first wireless device 1 selects one wireless device A from the second wireless devices 2 after S109 in FIG. 7 (S401).
　次に、以降のＳ４０３とＳ４０４を第二の無線機２の数分だけ行う（Ｓ４０２～Ｓ４０５）。第一の無線機１は、前記無線機Ａが他の第二の無線機２から受ける干渉電力と前記無線機Ａの雑音電力の比であるＩＮＲを算出し（Ｓ４０３）、その値に基づき、第二の情報４を変換または更新する（Ｓ４０４）。例えば、図４のような第二の情報４の場合、図１２及び図１３のように、第二の無線機２において干渉しない電波の情報は削除し、また、図５のような第二の情報４の場合、第二の無線機２において干渉しない電波の情報は除いて、利用可能なパラメータを再計算する。これを全ての第二の無線機２について行い、図７におけるＳ１１０に進む。なお、Ｓ４０４の第二の情報４の変換又は更新はＩＮＲではなく、距離や送信電力値に基づいても構わない。 Next, the subsequent steps S403 and S404 are performed for the number of the second wireless devices 2 (S402 to S405). The first wireless device 1 calculates INR, which is a ratio between the interference power received by the wireless device A from the other second wireless device 2 and the noise power of the wireless device A (S403), and based on the value, The second information 4 is converted or updated (S404). For example, in the case of the second information 4 as shown in FIG. 4, the radio wave information that does not interfere with the second radio 2 is deleted as shown in FIGS. 12 and 13, and the second information 4 as shown in FIG. In the case of information 4, the available parameters are recalculated except for information on radio waves that do not interfere with the second wireless device 2. This is performed for all the second wireless devices 2, and the process proceeds to S110 in FIG. Note that the conversion or update of the second information 4 in S404 may be based on distance or transmission power value instead of INR.
　第２の実施形態に係る第二の無線機５と第二の無線機６の情報共有の動作フローは、取得する第二の情報４が異なるのみであり、第１の実施形態に係る第二の無線機２の動作フローと同様である。 The operation flow for information sharing between the second wireless device 5 and the second wireless device 6 according to the second embodiment is different only in the second information 4 to be acquired, and the second information device according to the first embodiment. This is the same as the operation flow of the wireless device 2.
［効果］
　第２の実施形態の効果は、第１の実施形態の効果に加えて、第二の無線機２に通知する第二の情報４の情報量を削減することで、無線通信システム内におけるデータベースの共有に要する時間を短縮できることである。 [effect]
The effect of the second embodiment is that, in addition to the effect of the first embodiment, the information amount of the second information 4 notified to the second radio 2 is reduced, so that the database in the radio communication system is reduced. The time required for sharing can be shortened.
（第３の実施形態）
　本発明の第３の実施形態について図１６から図１７を参照して説明する。第３の実施形態では、少なくとも２台以上の無線機がほぼ同時に新しい周波数に切り替えて通信を行うときに起こり得る電波の干渉をスペクトルセンシングによって回避する。 (Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS. In the third embodiment, radio wave interference that may occur when at least two or more wireless devices perform communication by switching to a new frequency almost simultaneously is avoided by spectrum sensing.
［構成の説明］
　第３の実施形態に係る無線通信システムのシステム構成は第１または第２の実施形態の構成と同様である。 [Description of configuration]
The system configuration of the wireless communication system according to the third embodiment is the same as the configuration of the first or second embodiment.
　図１６に本実施形態に係る第一の無線機１と第二の無線機２の内部構成のブロック図を示す。図１６に示す第３の実施形態の第一の無線機１と第二の無線機２の内部構成は、第１の実施形態に係る第一の無線機１と第二の無線機２の内部構成にスペクトルセンシング部１－５およびスペクトルセンシング部２－５をそれぞれ追加したものである。 FIG. 16 shows a block diagram of the internal configuration of the first radio device 1 and the second radio device 2 according to the present embodiment. The internal configuration of the first radio device 1 and the second radio device 2 of the third embodiment shown in FIG. 16 is the same as that of the first radio device 1 and the second radio device 2 according to the first embodiment. A spectrum sensing unit 1-5 and a spectrum sensing unit 2-5 are added to the configuration.
　また、第３の実施形態に係る第一の無線機１の内部構成は、第２の実施形態に係る第一の無線機１の内部構成にスペクトルセンシング部１－５を追加したものでもかまわない。ここで、スペクトルセンシング部１－５とスペクトルセンシング部２－５はそれぞれ同じ機能、同じ構成の装置で構わない。なお、本実施形態では、第一の情報３はスペクトルセンシングの結果を含んでも構わない。すなわち、第二の無線機２が、スペクトルセンシング部２－５でスペクトルセンシングを行い、スペクトルセンシングの結果に基づき第一の情報３を生成し、生成した第一の情報３を第一の無線機１へ通知してもよい。 Further, the internal configuration of the first radio device 1 according to the third embodiment may be the one in which the spectrum sensing unit 1-5 is added to the internal configuration of the first radio device 1 according to the second embodiment. . Here, the spectrum sensing unit 1-5 and the spectrum sensing unit 2-5 may be devices having the same function and the same configuration. In the present embodiment, the first information 3 may include a spectrum sensing result. That is, the second wireless device 2 performs spectrum sensing by the spectrum sensing unit 2-5, generates the first information 3 based on the spectrum sensing result, and uses the generated first information 3 as the first wireless device. 1 may be notified.
［動作の説明］
　第３の実施形態に係る無線機間のシーケンスは図６、図１４に示した第１、第２の実施形態のそれと同様である。また、第３の実施形態に係る第一の無線機１と第二の無線機２の動作は図７～図９に示した第１の実施形態におけるそれとほぼ同様である。 [Description of operation]
The sequence between the radios according to the third embodiment is the same as that of the first and second embodiments shown in FIGS. The operations of the first radio device 1 and the second radio device 2 according to the third embodiment are substantially the same as those in the first embodiment shown in FIGS.
　ただし、第３の実施形態に係る第一の無線機１と第二の無線機２の情報共有後の動作フローは、図１７に示すように、図９のＳ３０１とＳ３０２の間にスペクトルセンシングによる干渉源の有無の判定（Ｓ５０１）が加わったものになる。スペクトルセンシング部１－５またはスペクトルセンシング部２－５は、選択（算出）された利用可能パラメータをもとに少なくとも利用する周波数の情報を含む利用パラメータを変更した後、スペクトルセンシングを実行し、スペクトルセンシングの結果、近辺に干渉源となる無線機が存在する場合、Ｓ３０１に戻り、干渉を回避するために利用するパラメータを再度選択する。なお、第一の無線機１、または、第二の無線機２は、利用パラメータを再度選択（変更）する前に、他の無線機に対して希望利用周波数の利用申請を通知し、希望利用周波数が利用可能か否かを確認してもよい。一方、近辺に干渉源となる無線機が存在しなかった場合、第一の情報３を更新し（Ｓ３０２）、通信を開始する。 However, the operation flow after information sharing between the first wireless device 1 and the second wireless device 2 according to the third embodiment is based on spectrum sensing between S301 and S302 in FIG. 9, as shown in FIG. This is added with the determination of the presence or absence of an interference source (S501). The spectrum sensing unit 1-5 or the spectrum sensing unit 2-5 changes the use parameter including at least frequency information to be used based on the selected (calculated) available parameter, performs spectrum sensing, and executes spectrum sensing. As a result of the sensing, when there is a wireless device that is an interference source in the vicinity, the process returns to S301, and a parameter used to avoid interference is selected again. The first wireless device 1 or the second wireless device 2 notifies the other wireless device of the application for use of the desired use frequency before reselecting (changing) the use parameter, and the desired use. It may be confirmed whether the frequency is available. On the other hand, when there is no wireless device serving as an interference source in the vicinity, the first information 3 is updated (S302), and communication is started.
［効果］
　第３の実施形態の効果は、第１、第２の実施形態の効果に加えて、第１の実施形態の動作の説明に示した他の無線機に対する選択したパラメータの利用申請よりも短い時間で、利用パラメータを変更した直後の無線機同士の電波干渉を回避できることである。 [effect]
In addition to the effects of the first and second embodiments, the effect of the third embodiment is shorter than the application for using the selected parameter for the other radio device shown in the explanation of the operation of the first embodiment. Thus, it is possible to avoid radio wave interference between the wireless devices immediately after changing the use parameter.
　なお、本発明は上記実施の形態に限られたものではなく、趣旨を逸脱しない範囲で適宜変更することが可能である。 Note that the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.
　上述の実施形態における各構成は、ハードウェア又はソフトウェア、もしくはその両方によって構成され、１つのハードウェア又はソフトウェアから構成してもよいし、複数のハードウェア又はソフトウェアから構成してもよい。無線装置の各機能（各処理）を、ＣＰＵやメモリ等を有するコンピュータにより実現してもよい。例えば、記憶装置に実施形態における無線通信方法を行うための無線通信プログラムを格納し、各機能を、記憶装置に格納された無線通信プログラムをＣＰＵで実行することにより実現してもよい。 Each configuration in the above-described embodiment is configured by hardware and / or software, and may be configured by one piece of hardware or software, or may be configured by a plurality of pieces of hardware or software. Each function (each process) of the wireless device may be realized by a computer having a CPU, a memory, and the like. For example, a wireless communication program for performing the wireless communication method according to the embodiment may be stored in the storage device, and each function may be realized by executing the wireless communication program stored in the storage device by the CPU.
　これらのプログラムは、様々なタイプの非一時的なコンピュータ可読媒体（non-transitory computer readable medium）を用いて格納され、コンピュータに供給することができる。非一時的なコンピュータ可読媒体は、様々なタイプの実体のある記録媒体（tangible storage medium）を含む。非一時的なコンピュータ可読媒体の例は、磁気記録媒体（例えばフレキシブルディスク、磁気テープ、ハードディスクドライブ）、光磁気記録媒体（例えば光磁気ディスク）、ＣＤ－ＲＯＭ（Read Only Memory）、ＣＤ－Ｒ、ＣＤ－Ｒ／Ｗ、半導体メモリ（例えば、マスクＲＯＭ、ＰＲＯＭ（Programmable ROM）、ＥＰＲＯＭ（Erasable PROM）、フラッシュＲＯＭ、ＲＡＭ（random access memory））を含む。また、プログラムは、様々なタイプの一時的なコンピュータ可読媒体（transitory computer readable medium）によってコンピュータに供給されてもよい。一時的なコンピュータ可読媒体の例は、電気信号、光信号、及び電磁波を含む。一時的なコンピュータ可読媒体は、電線及び光ファイバ等の有線通信路、又は無線通信路を介して、プログラムをコンピュータに供給できる。 These programs can be stored using various types of non-transitory computer readable media and supplied to a computer. Non-transitory computer readable media include various types of tangible storage media (tangible storage medium). Examples of non-transitory computer-readable media include magnetic recording media (eg flexible disks, magnetic tapes, hard disk drives), magneto-optical recording media (eg magneto-optical discs), CD-ROMs (Read Only Memory), CD-Rs, CD-R / W, semiconductor memory (for example, mask ROM, PROM (Programmable ROM), EPROM (Erasable ROM), flash ROM, RAM (random access memory)) are included. The program may also be supplied to the computer by various types of temporary computer-readable media. Examples of transitory computer readable media include electrical signals, optical signals, and electromagnetic waves. The temporary computer-readable medium can supply the program to the computer via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.
　上記の実施形態の一部または全部は、以下の付記のようにも記載され得るが、以下には限られない。 Some or all of the above embodiments may be described as in the following supplementary notes, but are not limited to the following.
（付記１）
　複数の無線機で構成される無線通信システムであって、
　前記無線通信システムに属する第一の無線機が、
　　前記第一の無線機とは異なる、前記無線通信システムに属する少なくとも１台以上の他の無線機の周波数利用状況に関する第一の情報を取得し、
　　前記第一の情報を基に、前記無線通信システムが存在するエリアにおける周波数利用に関わる第二の情報を生成し、
　　前記第二の情報を保持し、かつ、前記他の無線機のうち少なくとも１台以上の第二の無線機に配信し、
　前記第二の無線機は、前記第二の情報を保持する、
　無線通信システム。 (Appendix 1)
A wireless communication system including a plurality of wireless devices,
A first wireless device belonging to the wireless communication system,
Different from the first wireless device, obtaining first information on the frequency usage status of at least one other wireless device belonging to the wireless communication system;
Based on the first information, generate second information related to frequency use in the area where the wireless communication system exists,
Holding the second information and distributing to at least one second radio among the other radios;
The second wireless device holds the second information.
Wireless communication system.
　以上、実施の形態を参照して本願発明を説明したが、本願発明は上記によって限定されるものではない。本願発明の構成や詳細には、発明のスコープ内で当業者が理解し得る様々な変更をすることができる。 The present invention has been described above with reference to the embodiment, but the present invention is not limited to the above. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the invention.
　この出願は、２０１４年３月３１日に出願された日本出願特願２０１４－０７０８７５を基礎とする優先権を主張し、その開示の全てをここに取り込む。 This application claims priority based on Japanese Patent Application No. 2014-070875 filed on Mar. 31, 2014, the entire disclosure of which is incorporated herein.
１　　　第一の無線機
２　　　第二の無線機
３　　　第一の情報
４　　　第二の情報
５　　　第二の無線機に含まれる１つの無線機
６　　　第二の無線機に含まれる１つの無線機
１－１　第一の無線機１の無線通信部
１－２　第一の無線機１の第一情報保持部
１－３　第一の無線機１の第二情報保持部
１－４　第一の無線機１のパラメータ選択部
１－５　第一の無線機１のスペクトルセンシング部
１０　　第二情報生成部
１１　　通知範囲算出部
２－１　第二の無線機２の無線通信部
２－２　第二の無線機２の第一情報保持部
２－３　第二の無線機２の第二情報保持部
２－４　第二の無線機２のパラメータ選択部
２－５　第二の無線機２のスペクトルセンシング部
５－１　第二の無線機５の無線通信部
５－２　第二の無線機５の第一情報保持部
５－３　第二の無線機５の第二情報保持部
５－４　第二の無線機５のパラメータ選択部
４１　　第二の無線機５が取得する第二の情報
６－１　第二の無線機６の無線通信部
６－２　第二の無線機６の第一情報保持部
６－３　第二の無線機６の第二情報保持部
６－４　第二の無線機６のパラメータ選択部
１０　　第一の無線機
１１　　第一情報取得部
１２　　第二情報生成部
１３　　第二情報配信部
２０　　第二の無線機
２１　　第二情報取得部
２２　　第二情報保持部
４１　　第二の無線機５が取得する第二の情報
４２　　第二の無線機６が取得する第二の情報
７０　　周波数要求元車両
７１　　通信対象車両
８０　　データベース
９０　　現在位置情報
９１　　割り当て周波数
９２　　割り当て周波数の利用可能範囲
９３　　データベースの通信範囲 DESCRIPTION OF SYMBOLS 1 1st radio | wireless machine 2 2nd radio | wireless machine 3 1st information 4 2nd information 5 1 radio | wireless machine included in 2nd radio | wireless machine 6 1 radio | wireless machine included in 2nd radio | wireless machine 1- 1 wireless communication unit 1-2 of first wireless device 1 first information holding unit 1-3 of first wireless device 1 second information holding unit 1-4 of first wireless device 1 first wireless device 1 Parameter selection unit 1-5 spectrum sensing unit 10 of first radio 1 second information generation unit 11 notification range calculation unit 2-1 radio communication unit 2-2 of second radio 2 second radio 2 First information holding unit 2-3 Second information holding unit 2-4 of second radio 2 Parameter selection unit 2-5 of second radio 2 Spectrum sensing unit 5-1 of second radio 2 Wireless communication unit 5-2 of second wireless device 5 First information holding unit 5-3 of second wireless device 5 Second information holding unit 5-4 of second wireless device 5 Parameter selection unit 41 of second radio device 5 Second information 6-1 acquired by second radio device 5 Radio communication unit 6-2 of second radio device 6 First information holding of second radio device 6 Unit 6-3 second information holding unit 6-4 of second radio device 6 parameter selection unit 10 of second radio device 6 first radio device 11 first information acquisition unit 12 second information generation unit 13 second Information distribution unit 20 Second wireless device 21 Second information acquisition unit 22 Second information holding unit 41 Second information 42 acquired by second wireless device 5 Second information 70 acquired by second wireless device 6 Frequency request source vehicle 71 Communication target vehicle 80 Database 90 Current position information 91 Allocated frequency 92 Allocated frequency available range 93 Database communication range

Claims (17)

  1. 　複数の無線機で構成される無線通信システムであって、
    　前記無線通信システムを構成する第一の無線機は、
    　　前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を取得する第一情報取得手段と、
    　　前記取得した第一の情報を基に、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を生成する第二情報生成手段と、
    　　前記生成した第二の情報を、前記無線通信システムを構成する第二の無線機に配信する第二情報配信手段と、
    　を備え、
    　前記第二の無線機は、
    　　前記第一の無線機から前記第二の情報を取得する第二情報取得手段と、
    　　前記取得した第二情報を保持する第二情報保持手段と、
    　を備える、無線通信システム。     A wireless communication system including a plurality of wireless devices,
    The first wireless device constituting the wireless communication system is:
    First information acquisition means for acquiring first information on the frequency usage status of other wireless devices constituting the wireless communication system;
    Based on the acquired first information, second information generating means for generating second information regarding frequency use in an area where the wireless communication system exists;
    Second information distribution means for distributing the generated second information to a second wireless device constituting the wireless communication system;
    With
    The second radio is
    Second information acquisition means for acquiring the second information from the first wireless device;
    Second information holding means for holding the acquired second information;
    A wireless communication system.
  2. 　前記他の無線機は、前記無線通信システムを構成する少なくとも１台以上の無線機であり、
    　前記第二の情報は、前記無線通信システムが存在するエリアにおける前記他の無線機に関する前記第一の情報の集合である、
    　請求項１に記載の無線通信システム。     The other wireless device is at least one wireless device constituting the wireless communication system,
    The second information is a set of the first information related to the other wireless device in an area where the wireless communication system exists.
    The wireless communication system according to claim 1.
  3. 　前記第二の情報は、前記無線通信システムが存在するエリアにおける地点毎の利用可能周波数に関する情報である、
    　請求項１に記載の無線通信システム。     The second information is information on available frequencies for each point in an area where the wireless communication system exists.
    The wireless communication system according to claim 1.
  4. 　前記第一および第二の無線機は、前記第二の情報を基に、自無線機が参照するための少なくとも利用可能な周波数の情報を含む利用可能パラメータを算出するパラメータ算出手段を備える、
    　請求項１乃至３のいずれか一項に記載の無線通信システム。     The first and second radio devices include parameter calculation means for calculating an available parameter including information on at least an available frequency to be referred to by the own radio device based on the second information.
    The radio | wireless communications system as described in any one of Claims 1 thru | or 3.
  5. 　前記第一の無線機、または、第二の無線機は、前記無線通信システムを構成する無線機のうち前記第一および第二の無線機を除く無線機に、当該無線機の現在位置における周波数利用に関する前記第二の情報を通知する、
    　請求項１乃至４のいずれか一項に記載の無線通信システム。     The first radio device or the second radio device has a frequency at the current position of the radio device in a radio device other than the first and second radio devices among the radio devices constituting the radio communication system. Notify the second information about usage,
    The radio | wireless communications system as described in any one of Claims 1 thru | or 4.
  6. 　前記第一情報取得手段は、一定時間が経過した場合、または、前記第一または第二の無線機の利用周波数、送信電力、位置のいずれかに一定値以上の変更があった場合に、前記第一の情報を前記第二の無線機に対して要求し、前記第二情報生成手段が、前記第二の情報を生成する、
    　請求項１乃至５のいずれか一項に記載の無線通信システム。     The first information acquisition means, when a certain time has elapsed, or when there is a change of a certain value or more in either the usage frequency, transmission power, or position of the first or second radio, Requesting the first information to the second radio, the second information generating means generates the second information;
    The radio | wireless communications system as described in any one of Claims 1 thru | or 5.
  7. 　第二情報生成手段は、二台以上の前記第二の無線機間の距離または送信電波の到達範囲に基づいて、前記第二の情報に含まれる前記第二の無線機に関する情報を選択する、
    　請求項１乃至６のいずれか一項に記載の無線通信システム。     The second information generation means selects information on the second radio included in the second information based on a distance between two or more second radios or a reach of a transmission radio wave,
    The radio | wireless communications system as described in any one of Claims 1 thru | or 6.
  8. 　前記第一の無線機、または、前記第二の無線機は、スペクトルセンシングを行うスペクトルセンシング手段を備え、
    　前記スペクトルセンシング手段は、算出された前記利用可能パラメータを基に少なくとも利用する周波数の情報を含む利用パラメータを変更した後に、前記スペクトルセンシングを実行し、干渉する前記他の無線機が周辺に存在するか否かを確認し、前記他の無線機の存在が確認できた場合、前記利用パラメータを再度変更し、前記他の無線機の存在が確認できなかった場合、前記利用パラメータを用いた通信を続行する、
    　請求項４に記載の無線通信システム。     The first wireless device or the second wireless device includes spectrum sensing means for performing spectrum sensing,
    The spectrum sensing means changes the use parameter including at least the frequency information to be used based on the calculated available parameter, and then performs the spectrum sensing, and the other wireless device that interferes exists in the vicinity. If the presence of the other radio is confirmed, the use parameter is changed again. If the presence of the other radio is not confirmed, communication using the use parameter is performed. continue,
    The wireless communication system according to claim 4.
  9. 　前記第一の無線機、または、前記第二の無線機は、前記利用パラメータを変更する前に、前記他の無線機に対して希望利用周波数の利用申請を通知し、前記希望利用周波数が利用可能か否かを確認する、
    　請求項８に記載の無線通信システム。     Before changing the usage parameter, the first radio device or the second radio device notifies the other radio device of a use application for a desired use frequency, and the desired use frequency is used. Check if it is possible,
    The wireless communication system according to claim 8.
  10. 　前記第一の無線機と少なくとも１台以上の前記第二の無線機が、前記第一の無線機を最上位層とする多段階層のネットワークを構成し、
    　前記第二の無線機は、前記第二の無線機が保持する前記第一の情報と、前記第二の無線機より下位の層の前記第二の無線機、または、前記無線通信システムを構成する前記他の無線機から通知された前記第一の情報と、を１つ上位の層に属する前記第二の無線機、または、前記第一の無線機に対して通知する第一情報通知手段を備え、
    　前記第二情報生成手段は、前記第二の無線機から収集した前記第一の情報を基に前記第二の情報を生成し、
    　前記第二情報配信手段は、前記生成した第二の情報を１つ下位の層に属する少なくとも１台以上の前記第二の無線機に対して個別または一斉配信し、
    　前記第二情報保持手段は、前記第一の無線機、または、１つ上位の前記第二の無線機から配信された前記第二の情報を保持し、
    　前記第二の無線機は、前記保持した第二の情報を１つ下位の層に属する少なくとも１台以上の前記第二の無線機に対して個別または一斉配信する第二情報転送手段を備える、
    　請求項１乃至９のいずれか一項に記載の無線通信システム。     The first wireless device and at least one or more second wireless devices constitute a multi-stage network with the first wireless device as the highest layer,
    The second wireless device constitutes the first information held by the second wireless device and the second wireless device in a layer lower than the second wireless device, or the wireless communication system. The first information notified from the other wireless device to the first information notification means for notifying the second wireless device belonging to the layer one level higher or the first wireless device With
    The second information generation means generates the second information based on the first information collected from the second radio,
    The second information distribution means individually or simultaneously distributes the generated second information to at least one of the second wireless devices belonging to a lower layer,
    The second information holding unit holds the second information distributed from the first wireless device or the second wireless device one level above,
    The second wireless device includes second information transfer means for individually or simultaneously distributing the held second information to at least one of the second wireless devices belonging to a lower layer.
    The wireless communication system according to any one of claims 1 to 9.
  11. 　無線通信システムを構成する複数の無線機に含まれる無線機であって、
    　前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を取得する第一情報取得手段と、
    　前記取得した第一の情報を基に、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を生成する第二情報生成手段と、
    　前記生成した第二の情報を、前記無線通信システムを構成する第二の無線機に配信する第二情報配信手段と、
    　を備える、無線機。     A wireless device included in a plurality of wireless devices constituting a wireless communication system,
    First information acquisition means for acquiring first information on the frequency usage status of other wireless devices constituting the wireless communication system;
    Based on the acquired first information, second information generating means for generating second information regarding frequency use in an area where the wireless communication system exists;
    Second information distribution means for distributing the generated second information to a second wireless device constituting the wireless communication system;
    A wireless device.
  12. 　無線通信システムを構成する複数の無線機に含まれる無線機であって、
    　前記無線通信システムを構成する第一の無線機が、前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を基に生成した、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を、前記第一の無線機から取得する第二情報取得手段と、
    　前記取得した第二情報を保持する第二情報保持手段と、
    　を備える、無線機。     A wireless device included in a plurality of wireless devices constituting a wireless communication system,
    The frequency in the area where the wireless communication system exists, generated by the first wireless device constituting the wireless communication system based on the first information on the frequency usage status of other wireless devices constituting the wireless communication system. Second information acquisition means for acquiring second information regarding use from the first wireless device;
    Second information holding means for holding the acquired second information;
    A wireless device.
  13. 　複数の無線機で構成される無線通信システムにおける無線通信方法であって、
    　前記無線通信システムを構成する第一の無線機は、
    　　前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を取得し、
    　　前記取得した第一の情報を基に、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を生成し、
    　　前記生成した第二の情報を、前記無線通信システムを構成する第二の無線機に配信し、
    　前記第二の無線機は、
    　　前記第一の無線機から前記第二の情報を取得し、
    　　前記取得した第二情報を保持する、
    　無線通信方法。     A wireless communication method in a wireless communication system including a plurality of wireless devices,
    The first wireless device constituting the wireless communication system is:
    Obtaining first information on the frequency usage status of other radios constituting the radio communication system,
    Based on the acquired first information, generate second information regarding frequency use in the area where the wireless communication system exists,
    Distributing the generated second information to a second wireless device constituting the wireless communication system,
    The second radio is
    Obtaining the second information from the first radio,
    Holding the acquired second information;
    Wireless communication method.
  14. 　無線通信システムを構成する複数の無線機に含まれる無線機における無線通信方法であって、
    　前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を取得し、
    　前記取得した第一の情報を基に、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を生成し、
    　前記生成した第二の情報を、前記無線通信システムを構成する第二の無線機に配信する、
    　無線通信方法。     A wireless communication method in a wireless device included in a plurality of wireless devices constituting a wireless communication system,
    Obtaining first information on the frequency usage status of other radios constituting the radio communication system,
    Based on the acquired first information, generate second information regarding frequency use in the area where the wireless communication system exists,
    Distributing the generated second information to a second wireless device constituting the wireless communication system,
    Wireless communication method.
  15. 　無線通信システムを構成する複数の無線機に含まれる無線機における無線通信方法であって、
    　前記無線通信システムを構成する第一の無線機が、前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を基に生成した、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を、前記第一の無線機から取得し、
    　前記取得した第二情報を保持する、
    　無線通信方法。     A wireless communication method in a wireless device included in a plurality of wireless devices constituting a wireless communication system,
    The frequency in the area where the wireless communication system exists, generated by the first wireless device constituting the wireless communication system based on the first information on the frequency usage status of other wireless devices constituting the wireless communication system. Obtaining second information about usage from the first radio,
    Holding the acquired second information;
    Wireless communication method.
  16. 　無線通信システムを構成する複数の無線機に含まれる無線機に実行させるための無線通信プログラムが格納された非一時的なコンピュータ可読媒体であって、
    　前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を取得し、
    　前記取得した第一の情報を基に、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を生成し、
    　前記生成した第二の情報を、前記無線通信システムを構成する第二の無線機に配信する、
    　無線通信プログラムが格納された非一時的なコンピュータ可読媒体。     A non-transitory computer-readable medium storing a wireless communication program to be executed by a wireless device included in a plurality of wireless devices constituting a wireless communication system,
    Obtaining first information on the frequency usage status of other radios constituting the radio communication system,
    Based on the acquired first information, generate second information regarding frequency use in the area where the wireless communication system exists,
    Distributing the generated second information to a second wireless device constituting the wireless communication system,
    A non-transitory computer-readable medium storing a wireless communication program.
  17. 　無線通信システムを構成する複数の無線機に含まれる無線機に実行させるための無線通信プログラムが格納された非一時的なコンピュータ可読媒体であって、
    　前記無線通信システムを構成する第一の無線機が、前記無線通信システムを構成する他の無線機の周波数利用状況に関する第一の情報を基に生成した、前記無線通信システムが存在するエリアにおける周波数利用に関する第二の情報を、前記第一の無線機から取得し、
    　前記取得した第二情報を保持する、
    　無線通信プログラムが格納された非一時的なコンピュータ可読媒体。     A non-transitory computer-readable medium storing a wireless communication program to be executed by a wireless device included in a plurality of wireless devices constituting a wireless communication system,
    The frequency in the area where the wireless communication system exists, generated by the first wireless device constituting the wireless communication system based on the first information on the frequency usage status of other wireless devices constituting the wireless communication system. Obtaining second information about usage from the first radio,
    Holding the acquired second information;
    A non-transitory computer-readable medium storing a wireless communication program.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018012069A1 (en) * 2016-07-12 2018-01-18 ソニー株式会社 Management server, communication device, method, and recording medium

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011103573A (en) * 2009-11-11 2011-05-26 Fujitsu Ltd Wireless communication system, terminal device and wireless communication method in the wireless communication system
JP2012147090A (en) * 2011-01-07 2012-08-02 Hitachi Ltd Radio communication system, base station and server
JP2012147216A (en) * 2011-01-12 2012-08-02 National Institute Of Information & Communication Technology Management apparatus
EP2680631A1 (en) * 2011-02-22 2014-01-01 Sony Corporation Apparatus and method for antenna management

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011103573A (en) * 2009-11-11 2011-05-26 Fujitsu Ltd Wireless communication system, terminal device and wireless communication method in the wireless communication system
JP2012147090A (en) * 2011-01-07 2012-08-02 Hitachi Ltd Radio communication system, base station and server
JP2012147216A (en) * 2011-01-12 2012-08-02 National Institute Of Information & Communication Technology Management apparatus
EP2680631A1 (en) * 2011-02-22 2014-01-01 Sony Corporation Apparatus and method for antenna management

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018012069A1 (en) * 2016-07-12 2018-01-18 ソニー株式会社 Management server, communication device, method, and recording medium
JPWO2018012069A1 (en) * 2016-07-12 2019-04-25 ソニー株式会社 Management server, communication device, method and recording medium
US11006372B2 (en) 2016-07-12 2021-05-11 Sony Corporation Management server, communication device, method and recording medium
JP7020409B2 (en) 2016-07-12 2022-02-16 ソニーグループ株式会社 Management server, method and recording medium
US11570723B2 (en) 2016-07-12 2023-01-31 Sony Group Corporation Management server, communication device, method and recording medium

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