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WO2012032780A1 - Dispositif sans fil et procédé de communication - Google Patents

Dispositif sans fil et procédé de communication Download PDF

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Publication number
WO2012032780A1
WO2012032780A1 PCT/JP2011/005050 JP2011005050W WO2012032780A1 WO 2012032780 A1 WO2012032780 A1 WO 2012032780A1 JP 2011005050 W JP2011005050 W JP 2011005050W WO 2012032780 A1 WO2012032780 A1 WO 2012032780A1
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WIPO (PCT)
Prior art keywords
frequency
wireless
wireless system
information
wireless device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2011/005050
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English (en)
Japanese (ja)
Inventor
チェン スン
洲 藍
チンシャン サム
俊義 王
ハグエン チャン
ヨハネス アレムスグド デメシ
博司 原田
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National Institute of Information and Communications Technology
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National Institute of Information and Communications Technology
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Publication date
Application filed by National Institute of Information and Communications Technology filed Critical National Institute of Information and Communications Technology
Publication of WO2012032780A1 publication Critical patent/WO2012032780A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • the present invention relates to a radio apparatus and a communication method for preventing interference in a radio system sharing a frequency band in advance.
  • Wireless LAN is the system that works best in the Industrial Science and Medical Band (ISM Band: Industry-Science-Medical). Products related to 802.11 are widely spread and form a large market. However, due to the increase in ISM band usage, WLAN resources lack frequency resources that can achieve high throughput.
  • ISM Band Industrial Science and Medical Band
  • a wireless device such as a WLAN that does not require a license in a frequency band licensed for a specific use, such as a radar band (3650-3700 MHz).
  • a frequency band licensed for a specific use such as a radar band (3650-3700 MHz).
  • TVWS TV white space
  • the wireless device that does not require a license has been licensed because the priority for using the frequency band is low. Do not give radio equipment interference. However, since a licensed wireless device and a wireless device that does not require a license have different communication procedures and specifications, interference occurs when the frequency bands to be used overlap.
  • the conventional radio apparatus and communication method have a problem in that interference may occur between radio systems sharing a frequency band (particularly, radio systems having higher priority than self).
  • An embodiment of the present invention has been made to solve such a problem, and an object of the present invention is to provide a radio apparatus and a communication method capable of suppressing interference in radio apparatuses sharing a frequency band.
  • a wireless device is a wireless device belonging to a second wireless system different from the first wireless system in which a frequency band to be used overlaps with the first wireless system.
  • a transmitter / receiver that communicates with another wireless device belonging to the second wireless system, and a request information including information indicating a frequency to be used belonging to a frequency band used by the first wireless system and position information of itself.
  • a request transmission unit that transmits request information to a master device that manages information indicating the frequency and position of a wireless device that belongs to the first wireless system, and a request that belongs to a frequency band used by the first wireless system
  • a response receiving unit that receives frequency permission information indicating a frequency that the master device is permitted to use based on the information, and a frequency that is permitted to be used based on the frequency permission information.
  • a detecting unit for detecting presence / absence of radio waves of a wireless device belonging to the wireless system, and transmission of the transmitting / receiving unit at a frequency permitted to be used when the detecting unit does not detect radio waves of the wireless device belonging to the first wireless system. And a transmission control unit to be started.
  • Embodiment of this invention aims at providing the radio
  • FIG. 3A It is a figure which shows the specific example of the element of the information used with the radio
  • the wireless system of this embodiment includes a master device 1 that performs an empty channel determination, an access point (AP) device 2 that performs communication on a channel permitted by the master device 1, and a STA that communicates with an AP device 2.
  • AP access point
  • STA STA
  • the primary system PS is a wireless device that is licensed in a specific channel of a predetermined frequency band and has a higher priority than other wireless stations in using the channel.
  • the primary system PS corresponds to, for example, a radio device of a television broadcasting station licensed to use a specific channel in a television band.
  • the master device 1 is a wireless device that selects a channel (frequency) that can be used by a subordinate AP device 2 without causing any interference to the primary system PS among frequency bands used by the primary system PS.
  • the AP device 2 is a wireless device that can communicate using a frequency in a frequency band used by the primary system PS.
  • the AP device 2 can communicate with the STA device 3.
  • the AP device 2 of this embodiment functions as an access point that wirelessly communicates with the STA device 3, and is configured to be able to use frequencies in the frequency band overlapping with the primary system PS.
  • the primary system PS has a higher priority for using the frequency band than the AP device 2 and the STA device 3 (and also the master device 1), and the master device 1, the AP device 2, and the STA device 3 have a higher priority than the primary system PS. Therefore, it should not cause interference.
  • the primary system PS is a wireless device licensed for a specific channel of a television broadcast band
  • the master device 1, the AP device 2, and the STA device 3 are wireless LANs with limited coverage.
  • the wireless device can function as a system (WLAN).
  • a frequency band defined by the center frequency and the frequency bandwidth and assigned to the primary system PS and used by the WLAN device for communication is referred to as a “network channel”.
  • the master device 1 includes a receiving unit 12, a transmitting unit 13, and an interface unit (I / F) 14.
  • the receiving unit 12 receives a radio wave transmitted from a communication partner via the antenna 11 and demodulates it by a predetermined method.
  • the transmission unit 13 modulates information for the communication partner to generate a radio signal, and transmits the wireless signal to the communication partner via the antenna 11.
  • the I / F 14 connects the receiving unit 12 and the transmitting unit 13 to a network (NW) 15 such as the Internet.
  • NW network
  • the receiving unit 12 receives the radio wave from the communication partner via the antenna 11, demodulates it by a predetermined method, and sends it to the NW 15 via the I / F 14.
  • information from the NW 15 is sent to the transmission unit 13 via the I / F 14, and the transmission unit 13 converts the information into a radio signal and transmits it to the communication partner via the antenna 11. That is, the reception unit 12, the transmission unit 13, and the I / F 14 function as a WLAN access point that accommodates a communication partner as a client.
  • the reception unit 12 and the transmission unit 13 can be realized by using a system compliant with the IEEE 802.11 standard, for example. Note that the frequency band used by the receiving unit 12 and the transmitting unit 13 is at least partially overlapped with the frequency band used by the primary system PS.
  • the master device 1 includes a request analysis unit 16, an interference determination unit 17, and a response generation unit 18.
  • the request analysis unit 16 analyzes the content of the frequency allocation request sent from the AP device 2. Based on the request content of the AP device 2 analyzed by the request analysis unit 16, the interference determination unit 17 accesses the database DB connected to the NW 15 via the I / F 14 and determines whether the request content can be permitted. That is, the interference determination unit 17 determines whether the request content from the AP device 2 can give interference to the primary system PS.
  • the response generation unit 18 generates response information to the AP device 2 based on the determination result of the interference determination unit 17 and transmits the response information to the AP device 2 via the transmission unit 13.
  • the AP device 2 of this embodiment includes a receiving unit 22, a transmitting unit 23, and an I / F 24.
  • the reception unit 22, the transmission unit 23, and the I / F 24 in the AP device 2 have functions common to the reception unit 12, the transmission unit 13, and the I / F 14 in the master device 1.
  • the I / F 24 is connected to a network (NW) 25 such as the Internet.
  • NW 25 may be a network common to the NW 15 or a different network.
  • the AP apparatus 2 includes a transmission control unit 26, a request generation unit 27, a response analysis unit 28, and a service detection unit 29.
  • the transmission control unit 26 controls transmission of the transmission unit 23 and controls transmission frequency, transmission power, and the like.
  • the request generation unit 27 selects a channel and transmission power used by the AP device 2 and the STA device 3 under the AP device 2 and generates request information, and transmits the request information to the master device 1 via the transmission unit 23.
  • the response analysis unit 28 analyzes the content of the response information obtained as a result of transmitting the request information to the master device 1.
  • the transmission control unit 26 determines the usage channel and transmission power of the AP device 2 based on the contents of the analyzed response information, and controls the transmission unit 23.
  • the service detection unit 29 monitors the radio wave of the primary system PS via the reception unit 22 and detects whether the service of the primary system PS has been started (or has been started). The transmission control unit 26 performs transmission stop control based on the detection result.
  • the STA device 3 is a wireless device that constitutes a WLAN with the AP device 2.
  • the STA device 3 has a common configuration with the AP device 2.
  • the database DB stores position information, frequency information, transmission power information and other PS basic information of the primary system PS.
  • the database DB has a function of acquiring basic information of the corresponding primary system PS from the PS basic information group in response to a query from the master device 1 and returning the basic information to the master device 1.
  • the database DB and the master device 1 are connected via the network 15, but the present invention is not limited to this.
  • the database DB may be constructed in a storage device provided in the master device 1 or the like. The registered contents of the database DB are updated as needed by the authorized system owner of the primary system PS.
  • the AP device 2 Prior to using a network channel belonging to the frequency band of the primary system PS, the AP device 2 sends request information to the master device 1, and the use of the network channel at the location of the AP device 2 and its surroundings interferes with the primary system PS. Inquire whether or not to give. As shown in FIG.
  • the AP device 2 of this embodiment includes a requester address (RequesterRequestSTA address), a responder address (Responder STA address), a data length (Length), a reason / result code (ReasonaResult code), Network Channel Permission ID (Network Channel Enablement Identifier), Number of Network Channel Control Groups (Number of Network Channel Control Control triplets), Operation Class (Operating Class), Channel Number (Channel Number), and Maximum Transmission Power (Maximum Transmit Power) To the master device 1 as request information. Similarly, the master device 1 issues response information according to the request information from the AP device 2. The response information has the same elements as the request information. The requester address, the responder address, the data length, the reason / result code, the network channel permission ID, the number of network channel control groups, the operation class, the channel number, and the maximum The transmission power is included as an element.
  • the requester address is the address of the AP device 2 that is the requester who starts this procedure. For example, it is a logical address such as the MAC address of the AP device 2 or physical location information.
  • the responder address is the address of the master device 1 that gives the channel permission. Similar to the requester address, the responder address is a logical address such as the MAC address of the master device 1 or physical location information.
  • the data length is the total frame length constituting the request information.
  • the reason / result code defines whether or not the requested network channel can be used as a result of the master device 1 searching the database DB based on the request information, and if not, the reason.
  • the network channel permission ID is an ID assigned from the master device 1 to the AP device 2.
  • the number of network channel control pairs is the number of arrangements of the operation class / channel number and the maximum transmission power (the number of repetitions repeatedly arranged for each network channel of the operating STA).
  • the operation class is a set of network channels that the AP apparatus 2 seeks to use, and the channel number is the number of the corresponding channel.
  • the operation class and channel number specify a channel frequency and a frequency bandwidth for determining whether or not the network channel is available.
  • Examples of operational classes include those shown in Appendix J of IEEE 802.11af, which is a draft standard.
  • the channel number is included in the request information, it is the channel number of the network channel that requests use, and when it is included in the response information, it means the channel number of the network channel that is permitted to be used.
  • the maximum transmission power is the maximum transmission power for requesting use when included in the request information, and the transmission power permitted to be used when included in the response information. However, there is no need to have information on the maximum transmission power.
  • FIG. 3A and FIG. 3B show an example of a frame configuration when request information and response information are transmitted using a public action frame (Public Action Frame) defined by IEEE 802.11.
  • Public Action Frame defined by IEEE 802.11.
  • request information and response information for example, category, action value, requester address, responder address, data length, reason / result code, network channel permission ID
  • the number of network channel control sets, the operation class, the channel number, and the maximum transmission power can be included as elements.
  • the category is defined by 1 octet as a value corresponding to the public action specified in Table 7-24 in IEEE 802.11-2007.
  • the action value a value corresponding to each function defined in the table shown in FIG. 3B is defined by 1 octet.
  • “9” corresponding to “enable network channel” is set as the action value.
  • the reason / request code the reason why the response information is generated is defined by 1 octet. This code is specified in Table 7-57f1 in IEEE802.11y-2008.
  • Requester address and responder address are each defined in 6 octets.
  • the network channel permission ID is assigned a 16-bit number.
  • the maximum transmission power is defined in units of [dBm] for transmission power for TV band operation.
  • FIG. 4A and FIG. 4B show registered location query protocol elements (RLQP) when request information and response information are transmitted using the GAS protocol (Generic Advertisement Service protocol).
  • GAS protocol Generic Advertisement Service protocol
  • FIG. 4A when request information and response information are transmitted by RLQP of GAS protocol, information ID, requester address, responder address, data length, reason / result code, network channel permission ID, network channel control set Number, operational class, channel number, and maximum transmit power can be included as elements.
  • the information ID is defined by 1 octet of the information ID corresponding to the information name defined in the table shown in FIG. 4B.
  • “3” corresponding to “network channel enablement” is set as the information ID.
  • the request information and the response information include information useful for determining the presence or absence of interference.
  • the request generation unit 27 includes one or more sets of necessary operation class, channel number, and maximum transmission power.
  • Request information is set and a request frame is generated (step 101; hereinafter referred to as “S101”).
  • the category has a predetermined value
  • the action value is “9”
  • the requester address is the MAC address of the AP device 2
  • the responder address is the MAC address of the master device 1
  • the data length is a predetermined value.
  • the reason / result code and the network channel permission ID are blank, the number of network channel control groups is “1”, the operation class is a predetermined class, the channel number is 1 to 3, and the maximum transmission power is 100 [mW].
  • a request frame in which a parameter such as dBm] is defined is generated.
  • the request information can be generated based on a request on the application, a request on the hardware of the AP device 2, a channel measurement result by the service detection unit, and the like.
  • the transmission unit 23 modulates the request frame and transmits it to the master device 1 via the antenna 21 (S102).
  • the request analysis unit 16 analyzes the request frame and extracts request information (S104).
  • the interference determination unit 17 uses the AP in the area where the AP device 2 is located based on at least one of the address of the AP device 2 and the geographical position information of the master device 1 itself included in the request information.
  • a query requesting the database DB to search for a possible network channel is generated (S105). It is assumed that the geographical position information of the AP device 2 can be obtained by searching or the like from the MAC address of the AP device 2, the installer information of the AP device 2, or the like.
  • the interference determination unit 17 issues the query to the database DB via the I / F 14 (S106).
  • the database DB analyzes the contents of the query (S108), and a list of primary systems PS that may cause interference based on the geographical position information of at least one of the master device 1 and the AP device 2. And a channel list of network channels that can be used by the AP apparatus 2 is generated based on the list.
  • the database DB returns the generated channel list to the master device 1 (S110).
  • the channel list sent from the database DB to the master device 1 includes at least one of a list of primary systems PS that can give interference and a list of network channels that can be used by the AP device 2.
  • the interference determination unit 17 Upon receiving the channel list, the interference determination unit 17 compares the channel list with the request information, and generates an allowed channel list in which channels available to the AP device 2 are extracted from the channels requested by the AP device 2 ( S111). That is, since the channel list includes at least one of a list of primary systems PS that can cause interference and a list of network channels that can be used by the AP device 2, this list and the network channel requested by the AP device 2 are included. By comparing with the above information, it is possible to obtain a network channel that does not cause interference problems.
  • the interference determining unit 17 When the permitted channel list is generated, the interference determining unit 17 generates response information as shown in FIG. 3A based on the permitted operation class, channel number, and maximum transmission power, and the response generating unit 18 is based on the response information.
  • a response frame is generated (S112).
  • the transmission unit 13 transmits the generated response frame to the AP device 2.
  • the response analyzing unit 28 analyzes the response frame and extracts response information (S114). The retrieved response information is sent to the transmission control unit 26.
  • the transmission control unit 26 Upon obtaining the response information, the transmission control unit 26 sets the network channel (transmission frequency) and transmission power of the transmission unit 23 based on the permitted operation class, channel number, and maximum transmission power described in the response information (S115). ). As a result, the transmission unit 23 is ready for transmission.
  • the service detection unit 29 controls the reception unit 22 to check whether the radio wave of the primary system PS can be received (S116).
  • the receiving unit 22 receives the radio wave of the primary system PS (Yes in S117)
  • the set network channel cannot be used. Therefore, the transmission control unit 26 does not include the permitted network channel described in the response information.
  • the transmission control unit 26 does not include the permitted network channel described in the response information.
  • the transmission control unit 26 issues a transmission permission to the transmission unit 23.
  • the transmission unit 23 starts communication with the STA device 3 using the set operation class, channel number, and transmission power (S118). During communication, the transmission unit 23 transfers the response frame (or permitted channel list) received from the master device 1 to the STA device 3, and performs network channel setting and radio wave detection based on the transferred information. Also good.
  • the STA device 3 may directly receive the response frame (or permitted channel list) from the master device 1 and perform channel setting and radio wave detection by itself.
  • the service detection unit 29 controls the reception unit 22 at a predetermined timing to monitor whether the radio wave of the primary system PS can be received (S119). While the radio wave of the primary system PS cannot be received (No in S119), the transmission unit 23 continues communication under the same conditions.
  • the transmission control unit 26 selects another channel number and transmission power from the permitted channels described in the response information and transmits the selected channel.
  • the transmission frequency and transmission power of the unit 23 are reset (S115). Thereafter, this operation is repeated.
  • FIG. 6 shows an example in which the master device 1 is configured by a fixed wireless device, and the AP device 2 is configured by an access point device configuring a WLAN.
  • the AP device 2 sends a request frame to the master device 1 (S102)
  • the master device 1 sends a query to the database DB (S106)
  • the database DB returns a channel list to the master device 1 (S110).
  • the master device 1 sends a response frame to the AP device 2 (S112).
  • the response frame is transferred to the STA device 3 as appropriate.
  • the STA device 3 may receive a response frame directly from the master device 1.
  • FIG. 6 shows an example in which the master device 1 is configured by a fixed wireless device, and the AP device 2 is configured by an access point device configuring a WLAN.
  • the master apparatus 1 is configured by an STA apparatus having a function as a master apparatus
  • the AP apparatus 2 is configured by an access point apparatus configuring a WLAN, as in the example illustrated in FIG. ing.
  • the communication between the master device 1 and the database DB may be realized via a wired network or via a wireless network. Also good.
  • the master device 1 is configured by a fixed wireless device, and in the example illustrated in FIG. 9, the master device 1 is configured by an STA device having a function as a master device.
  • FIG. 10 shows an example in which the AP device 2 AP functioning as an access point and the STA device 2 CL belonging to the AP device 2 AP both obtain the permitted channel list directly from the master device 1.
  • a master device that issues a permitted channel list based on PS basic information and request information of the primary system PS, and a STA device that sets a network channel to be used based on the permitted channel list, Therefore, it is possible to exclude network channels, transmission power, and the like that can interfere with the primary system PS from setting candidates.
  • the PS basic information is information updated by the authorized system owner of the primary system PS, it becomes possible to prevent interference in advance.
  • the primary system PS is not a system that uniformly uses the entire frequency band assigned like radar, but is used in a certain band (channel) unit among frequency bands assigned like television broadcasting. It is effective in the system and can realize fine interference prevention.
  • the AP device 2 (and the STA device 3) of this embodiment includes a service detection unit, monitors whether the primary system PS receives radio waves, and determines whether or not transmission is possible along with the permitted channel list of response information. As a result, interference can be prevented more reliably.
  • the master device 1 sends geographical location information to the database DB, and the database DB generates a usable channel list from the frequency band of the primary system PS based on the location information.
  • the master apparatus 1 may be configured to send the transmission power information included in the request information in addition to the geographical position information, and the database DB may generate the channel list based on the geographical position information and the transmission power information.
  • the master device 1 may be configured to generate the permitted channel list based on the channel list sent from the database DB and the transmission power information included in the request information. Further, the permitted channel list may be determined based on the possibility of interference with the primary system PS that is the licensed user, the channel management capacity of the master device 1, and the like.
  • the master device 1 does not perform the service detection operation, but may include a service detection unit similar to the AP device 2. That is, the master device 1 may be configured to be able to emit radio waves after confirming that the response information and the radio waves of the primary system PS are not emitted before emitting radio waves.
  • the AP device uses the channel after confirming with the master device an available channel from the frequency band of the primary system PS. The possibility of giving can be lowered.
  • the wireless system of this embodiment is configured such that the master device 1 in the first embodiment has the function of a WLAN access point AP, and the AP device 2 also has the function of a WLAN client.
  • the master device 1 in the first embodiment has the function of a WLAN access point AP
  • the AP device 2 also has the function of a WLAN client.
  • the wireless system of this embodiment includes a master device 1a that functions as an access point, and a STA device 2a that functions as a client that constitutes a WLAN under the control of the master device 1a. .
  • the master device 1a as an access point without waiting for a request frame from the STA device 2a as a client, the master device 1a as an access point itself generates request information and issues a query.
  • the master device 1a of this embodiment includes a receiving unit 12, a transmitting unit 13, an I / F 14, and an interference determining unit 17, and these elements are common to the first embodiment.
  • the master device 1a includes a request generation unit 16a and a permission generation unit 18a.
  • the request generation unit 16a corresponds to the request generation unit 27 in the first embodiment, and the request generation unit 27 selects request information by selecting a network channel and transmission power used by the master device 1a and the subordinate STA device 2a.
  • the permission generation unit 18 a corresponds to the response generation unit 18 in the first embodiment, generates permission information for the STA device 2 a based on the determination result of the interference determination unit 17, and sends the client device 2 a via the transmission unit 13. Send to.
  • the permission information corresponds to the response information in the first embodiment.
  • the STA device 2a of this embodiment includes a reception unit 22, a transmission unit 23, an I / F 24, a transmission control unit 26, a request generation unit 27, and a service detection unit 29. These components are common to the AP apparatus 2 in the first embodiment. Furthermore, the STA device 2a has a permission analysis unit 28a.
  • the permission analysis unit 28a corresponds to the response analysis unit 28 in the first embodiment, and analyzes the content of the permission frame sent from the master device 1a.
  • the request generation unit 16a obtains a necessary operation class, channel number, and maximum transmission power. Request information including one or more sets is set (S201). At this time, the request information can be set along the frame format shown in FIG. 3A.
  • the interference determination unit 17 searches the database for available network channels in the area where the master device 1a and the subordinate STA device 2a are located based on the geographical position information of the master device 1a itself. A query requested to the DB is generated (S105).
  • the interference determination unit 17 issues the query to the database DB via the I / F 14 (S106). Thereafter, the database DB performs a search process based on the query, and is common to steps 107 to 110 in the first embodiment until the channel list is returned (S107 to S110).
  • the interference determination unit 17 Upon receipt of the channel list, the interference determination unit 17 compares the channel list with the request information, and permits the channel that can be used by the master device 1a and the subordinate STA device 2a from the request information channels generated by itself. A channel list is generated (S111).
  • the interference determination unit 17 When the permitted channel list is generated, the interference determination unit 17 generates permission information as illustrated in FIG. 3A based on the permitted operation class, channel number, and maximum transmission power, and the permission generation unit 18a performs based on the permission information. To generate a permission frame (S212). The transmission unit 13 transmits the generated permission frame to the STA device 2a.
  • the permission analysis unit 28a analyzes the permission frame and extracts permission information (S214). The extracted permission information is sent to the transmission control unit 26.
  • the transmission control unit 26 Upon obtaining the permission information, the transmission control unit 26 sets the network channel (transmission frequency) and transmission power of the transmission unit 23 based on the permitted operation class, channel number, and maximum transmission power described in the permission information ( S115). As a result, the transmission unit 23 is ready for transmission. Thereafter, steps such as radio wave detection and communication start control of the primary system PS are common to steps 116 to S119 in the first embodiment.
  • the master device 1a does not perform the service detection operation.
  • the master device 1a includes a service detection unit as in the STA device 2a. May be. That is, the master device 1a may be configured to be able to emit radio waves after confirming that the permission information and the radio waves of the primary system PS are not emitted before emitting radio waves. Thereby, the possibility of giving interference to the primary system PS can be reduced.
  • the master device that issues permission for the network channel to be used from the frequency band assigned to the primary system PS also functions as a WLAN access point. Therefore, the master device 1a as an access point can obtain the permission of the network channel used by the whole WLAN as a representative. This contributes to simplifying the communication sequence and suppressing communication traffic.
  • the wireless system of this embodiment is configured by separating the master device 1a in the second embodiment into an access point AP having an access point function and a calculation unit PC that obtains a channel list from a database DB and generates permission information.
  • the basic operation is the same as that of the second embodiment.
  • the configuration of the master device 1a can be made flexible.
  • the access point AP and the computing unit PC can be installed at geographically separated locations.
  • the present invention is not limited to the above embodiment and its operation example.
  • the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage.
  • various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.
  • constituent elements over different embodiments may be appropriately combined.

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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un dispositif sans fil et un procédé de communication aptes à supprimer une diaphonie dans des dispositifs sans fil partageant une bande de fréquence. Un dispositif sans fil selon le mode de réalisation est un dispositif sans fil appartenant à un second système sans fil différent d'un premier système sans fil de manière qu'une bande de fréquence qui est utilisée chevauche celle du premier système sans fil, le dispositif sans fil comprenant : une unité d'émission et de réception pour communiquer avec un autre dispositif sans fil appartenant au second système sans fil ; une unité d'envoi de requête qui génère des informations de requête contenant des informations indiquant une fréquence, appartenant à une bande de fréquence utilisée par le premier système sans fil, dont l'utilisation est recherchée et des informations de position du dispositif sans fil, et qui envoie les informations de requête à un dispositif maître qui gère des informations indiquant la fréquence et la position du dispositif sans fil appartenant au premier système sans fil de manière que les informations puissent être recherchées ; une unité de réception de réponse qui reçoit des informations d'autorisation de fréquence indiquant une fréquence, appartenant à la bande de fréquence utilisée par le premier système sans fil, dont le dispositif maître a autorisé l'utilisation sur la base des informations de requête ; une unité de détection pour détecter la présence ou l'absence d'ondes radio du dispositif sans fil appartenant au premier système sans fil dans la fréquence dont l'utilisation a été autorisée, sur la base des informations d'autorisation de fréquence ; et une unité de commande d'émission qui démarre une émission pour l'unité d'émission et de réception dans la fréquence dont l'utilisation a été autorisée si l'unité de détection ne détecte pas d'ondes radio du dispositif sans fil appartenant au premier système sans fil.
PCT/JP2011/005050 2010-09-09 2011-09-08 Dispositif sans fil et procédé de communication Ceased WO2012032780A1 (fr)

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JP2010-202126 2010-09-09
JP2010202126A JP5729629B2 (ja) 2010-09-09 2010-09-09 無線装置、通信方法

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US9769774B2 (en) 2010-12-30 2017-09-19 Lg Electronics Inc. Method and apparatus for transceiving channel transmit power information in a wireless communication system
US20150029983A1 (en) * 2012-04-11 2015-01-29 Hitachi Kokusai Electric Inc. Radio system, radio base station, and management apparatus
JP5958747B2 (ja) * 2012-06-14 2016-08-02 国立研究開発法人情報通信研究機構 通信装置、通信制御方法

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JP2007300419A (ja) * 2006-04-28 2007-11-15 Toshiba Corp コグニティブ無線システム
WO2010084801A1 (fr) * 2009-01-26 2010-07-29 ソニー株式会社 Procédé de commande de communication, appareil de communication et programme

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US9775047B2 (en) 2012-06-25 2017-09-26 National Institute Of Information And Communications Technology Communication device and communication control method
CN103596186A (zh) * 2013-11-29 2014-02-19 苏州大学 数据库驱动的认知无线电网络的带内引导方法
CN103596186B (zh) * 2013-11-29 2017-01-04 苏州大学 数据库驱动的认知无线电网络的带内引导方法

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JP5729629B2 (ja) 2015-06-03

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