WO2022091943A1 - 通信装置、制御方法、およびプログラム - Google Patents
通信装置、制御方法、およびプログラム Download PDFInfo
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- WO2022091943A1 WO2022091943A1 PCT/JP2021/038962 JP2021038962W WO2022091943A1 WO 2022091943 A1 WO2022091943 A1 WO 2022091943A1 JP 2021038962 W JP2021038962 W JP 2021038962W WO 2022091943 A1 WO2022091943 A1 WO 2022091943A1
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- 238000004891 communication Methods 0.000 title claims abstract description 382
- 238000000034 method Methods 0.000 title claims description 16
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- 230000005540 biological transmission Effects 0.000 claims description 66
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- 230000008859 change Effects 0.000 description 9
- 230000015654 memory Effects 0.000 description 7
- MKMCJLMBVKHUMS-UHFFFAOYSA-N Coixol Chemical compound COC1=CC=C2NC(=O)OC2=C1 MKMCJLMBVKHUMS-UHFFFAOYSA-N 0.000 description 4
- 238000004590 computer program Methods 0.000 description 4
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- 230000007423 decrease Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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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
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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
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/15—Setup of multiple wireless link connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/22—Manipulation of transport tunnels
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/005—Discovery of network devices, e.g. terminals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Definitions
- the present invention relates to a communication device that performs wireless communication.
- the IEEE802.11 standard series is known as a communication standard for wireless LAN (Local Area Network). IEEE is an abbreviation for Institute of Electrical and Electricals Engineers, and the IEEE802.11 standard series includes standards such as IEEE802.11a / b / g / n / ac / ax.
- IEEE802.11ax described in Patent Document 1 in addition to a high peak throughput, a technique for improving the communication speed under a congested situation is standardized. Further, in IEEE802.11ax, in order to notify the STA of the information necessary for the AP to perform wireless communication, the FILS Discovery frame can be transmitted at shorter intervals than the Beacon frame in addition to the Beacon frame.
- AP is an abbreviation for Access Point
- STA is an abbreviation for Station
- FILS is an abbreviation for Fast Initial Link Setup.
- Task Group which formulates the standard of IEEE802.11be (hereinafter referred to as 11be), was established as a successor standard of IEEE802.11ax.
- the 802.11 AP has established a connection with the STA via a single frequency channel and communicated with it.
- Multi-Link multi-link
- Multi-Link communication which is being considered for introduction in 11be
- the amount of information in both frames may increase and the communication overhead may increase. ..
- the communication device of the present invention is A communication device capable of establishing a connection with another communication device via the first frequency channel and the second frequency channel.
- a first transmission means for transmitting a Beacon frame at a predetermined transmission interval A second transmission means for transmitting a FILS Discovery frame or an Integrated Probe Response frame at a predetermined transmission interval shorter than the Beacon frame, and a second transmission means.
- the Beamon frame transmitted on the first frequency channel by the first transmission means Contains information for communicating on the second frequency channel, and the FILS Discovery frame or the Unified Probe Response frame transmitted on the first frequency channel by the second transmitting means includes the above. It is characterized by not containing information.
- communication overhead can be suppressed by appropriately storing information on a frequency channel for communication in frames transmitted at predetermined intervals.
- FIG. 1 shows a network configuration in which an AP (Access Point, access point) 102 according to the present embodiment participates.
- the communication device 102 is a communication device having a role of constructing a network 101.
- the network 101 is a wireless network.
- the STA (Station) 103 is a communication device having a role of participating in the network 101.
- Each communication device is compatible with the IEEE802.11be (EHT) standard, and can perform wireless communication conforming to the IEEE802.11be standard via the network 101.
- IEEE is an abbreviation for Institute of Electrical and Electronics Engineers.
- EHT is an abbreviation for Extremely High Fluorhput.
- EHT may be interpreted as an abbreviation for Extreme High Throughput.
- Each communication device can communicate in a frequency band of 2.4 GHz band, 5 GHz band, and 6 GHz band. The frequency band used by each communication device is not limited to this, and different frequency bands may be used, for example, a 60 GHz band. Also, each communication device can communicate using bandwidths of 20 MHz, 40 MHz, 80 MHz, 160 MHz, and 320 MHz.
- the communication device 102 and the communication device 103 can realize multi-user (MU, Multi User) communication in which signals of a plurality of users are multiplexed by executing OFDMA communication conforming to the IEEE802.11be standard.
- OFDMA communication is an abbreviation for Orthogonal Frequency Division Multiple Access (Orthogonal Frequency Division Multiple Access).
- RU Resource Unit
- the AP can communicate with a plurality of STAs in parallel.
- the communication device 102 and the communication device 103 establish a link via a plurality of frequency channels and execute multi-link (Multi-Link) communication for communication.
- the AP that executes multi-link communication is also called AP MLD (Multi-Link Device).
- the frequency channel refers to a frequency channel defined in the IEEE 802.11 standard series and capable of executing wireless communication conforming to the 802.11 standard series.
- a plurality of frequency channels are defined in each frequency band of 2.4 GHz band, 5 GHz band, and 6 GHz band.
- the bandwidth of each frequency channel is defined as 20 MHz. By bonding to adjacent frequency channels, a bandwidth of 40 MHz or more may be used in one frequency channel.
- the communication device 102 establishes a communication device 103, a first link 104 via a first frequency channel in the 2.4 GHz band, and a second link 105 via a second frequency channel in the 5 GHz band. And you can communicate over both links.
- the communication device 102 maintains the second link 105 via the second frequency channel in parallel with the first link 104 via the first frequency channel.
- the communication device 102 can improve the throughput in communication with the communication device 103 by establishing a link with the communication device 103 via a plurality of frequency channels.
- the communication device 102 and the communication device 103 may establish a plurality of links having different frequency bands in the multi-link communication.
- the communication device 102 and the communication device 103 may establish a third link in the 6 GHz band in addition to the first link 104 in the 2.4 GHz band and the second link 105 in the 5 GHz band. good.
- the link may be established via a plurality of different channels contained in the same frequency band. For example, a first link 104 via 1ch in the 2.4 GHz band and a second link 105 via 5ch in the 2.4 GHz band may be established. Links with the same frequency band and links with different frequency bands may coexist.
- the communication device 102 and the communication device 103 have 36 channels in the 5 GHz band in addition to the first link 104 via 1ch in the 2.4 GHz band and the second link 105 via 5 channels in the 2.4 GHz band.
- a third link may be established via.
- a plurality of links established by the communication device 102 and the communication device 103 may have at least different frequency channels.
- the channel spacing of the frequency channels of the plurality of links established by the communication device 102 and the communication device 103 may be at least 20 MHz or larger.
- the communication device 102 and the communication device 103 establish the first link 104 and the second link 105, but three or more links may be established.
- the communication device 102 When executing multi-link communication, the communication device 102 constructs a plurality of wireless networks so as to correspond to each link.
- the communication device 102 internally has a plurality of APs and operates so as to construct a wireless network for each of them.
- the AP internally contained in the communication device 102 may be one or more physical APs, or may be a plurality of virtual APs configured on one physical AP.
- a common wireless network may be used for the plurality of links.
- the communication device 102 and the communication device 103 divide one data and transmit it to the other device via a plurality of links.
- the communication device 102 and the communication device 103 may transmit the same data via each of the plurality of links, so that the communication via one link can be used as backup communication for the communication via the other link. ..
- the communication device 102 transmits the same data to the communication device 103 via the first link via the first frequency channel and the second link via the second frequency channel. In this case, for example, even if an error occurs in communication via the first link, the same data is transmitted via the second link, so that the communication device 103 transmits the data transmitted from the communication device 102. Can be received.
- the communication device 102 and the communication device 103 may use different links depending on the type of frame to be communicated and the type of data.
- the management frame may be transmitted via the first link, and the data frame containing data may be transmitted via the second link.
- the management frame specifically refers to a Beacon frame, a Probe Request frame / Response frame, and an Association Request frame / Response frame.
- a Disassociation frame, an Authentication frame, a De-Authentication frame, and an Action frame are also called management frames.
- the Beacon frame is a frame for notifying network information.
- the Probe Request frame is a frame for requesting network information
- the Probe Response frame is a response thereof and is a frame for providing network information.
- the Associate Request frame is a frame that requests a connection
- the Associate Response frame is a response thereof, and is a frame that indicates permission or an error for connection.
- the Disassociation frame is a frame for disconnecting the connection.
- the Authentication frame is a frame for authenticating the remote device
- the De-Autuation frame is a frame for interrupting the authentication of the remote device and disconnecting the connection.
- the Action frame is a frame for performing additional functions other than the above.
- the communication device 102 and the communication device 103 transmit and receive management frames conforming to the IEEE802.11 standard series.
- the communication device 102 transmits data related to a captured image, for example, meta information such as a date, parameters at the time of imaging (aperture value and shutter speed), and position information is transmitted via the first link, and pixel information. May be sent via a second link.
- meta information such as a date, parameters at the time of imaging (aperture value and shutter speed), and position information is transmitted via the first link, and pixel information. May be sent via a second link.
- the communication device 102 and the communication device 103 may be able to execute MIMO (Multiple-Import And Multiple-Output) communication.
- MIMO Multiple-Import And Multiple-Output
- the communication device 102 and the communication device 103 have a plurality of antennas, one of which sends a different signal from each antenna using the same frequency channel.
- the receiving side simultaneously receives all the signals arriving from the plurality of streams using the plurality of antennas, separates the signals of each stream, and decodes them.
- MIMO communication Multiple-Import And Multiple-Output
- the communication device 102 and the communication device 103 can communicate more data in the same time as compared with the case where MIMO communication is not executed.
- the communication device 102 and the communication device 103 may execute MIMO communication on some links when performing multi-link communication.
- the communication device 102 may transmit a FILS Discovery frame and / or an Integrated Probe Response frame in addition to the Beamon frame in order to notify the network information.
- FILS is an abbreviation for Fast Initial Link Setup.
- the Beamon frame includes information for communicating on the frequency channel for transmitting the Beacon frame, such as the transmission interval of the Beacon frame and information on the frequency channel that can be operated, and information for the STA that establishes a connection with the AP to synchronize the time. Is included.
- the FILS Discovery frame is an Action frame, and includes information such as the transmission interval of the Beacon frame and the SSID (Service Set Identifier) of the AP that transmits the FILS Discovery frame.
- the Beacon frame is transmitted at a predetermined transmission interval, and the FILS Discovery frame and / or the Unified Probe Response frame is transmitted at a shorter interval than the transmission interval of the Beacon frame.
- the communication device 102 can include information of a plurality of APs in the RNR (Reduced Nightbor Report) election of the FILS Discovery frame and the Beacon frame.
- the information of the plurality of APs is the information for communicating with the link 1 and the information for communicating with the link 2 when the communication device communicates with the link 1 via the link 2.
- the RNR element includes information such as the operating class and channel information of each AP, and the transmission timing of the Beacon frame.
- the communication device 102 can include the information about the AP of each link that executes the multi-link communication in the RNR element of the FILS Discovery frame or the Beamon frame in addition to the above-mentioned information.
- the information about the AP of each link includes information for communicating with a link different from the link, in addition to the information for communicating with the link transmitting the FILS Discovery frame and the Beacon frame.
- the FILS Discovery frame contains less information than the Beacon frame.
- the communication device 102 can include the same information as the normal Probe Response frame in the Unified Probe Response frame. Unlike the normal Probe Response frame, the Unified Probe Response frame is a frame that the communication device 102 autonomously transmits at a predetermined transmission interval.
- the communication device 102 that supports multi-link communication can include an RNR element including information about the AP of each link constituting the multi-link of its own device in the Unified Probe Response frame.
- the information about the AP of each link includes information for communicating with a link different from the link, in addition to the information for communicating with the link transmitting the Unified Probe Response frame.
- the IEEE802.11ax standard stipulates that if the AP operates in the 6 GHz band, the AP may transmit FILS Discovery frames and / or Unified Probe Response frames at 20 TU intervals.
- TU is an abbreviation for Time Unit, and 1 TU corresponds to 1 ms.
- the AP will transmit the FILS Discovery frame and / or the Unified Probe Response frame at intervals shorter than the Beacon frame transmission interval of 100 TU.
- the communication device 102 When the communication device 102 establishes a plurality of links including the 6 GHz band, it is necessary to transmit a FILS Discovery frame in addition to the Beacon frame. Therefore, when the frequency band for executing multi-link communication includes the 6 GHz band, if information about the multi-link communication is stored and transmitted in both of the above frames, the size of both frames becomes large and the communication throughput decreases. There is a risk. Therefore, the communication device 102 of the present embodiment suppresses a decrease in the communication throughput by appropriately setting the information to be stored in the frame based on whether or not the multi-link communication is performed.
- the communication device 102 and the communication device 103 are said to correspond to the IEEE802.11be standard, but in addition to or instead of this, they correspond to at least one of the legacy standards which are the standards prior to the IEEE802.11be standard. May be.
- the legacy standard is the IEEE802.11a / b / g / n / ac / ax standard.
- other communication standards such as Bluetooth®, NFC, UWB, Zigbee, and MBOA may be supported.
- UWB is an abbreviation for Ultra Wide Band
- MBOA is an abbreviation for Multi Band OFDM Alliance.
- OFDM is an abbreviation for Orthogonal Frequency Division Multiplexing.
- NFC is an abbreviation for Near Field Communication.
- UWB includes wireless USB, wireless 1394, Winet and the like. Further, it may be compatible with a communication standard for wired communication such as a wired LAN.
- Specific examples of the communication device 102 include, but are not limited to, a wireless LAN router and a PC.
- the communication device 102 may be any communication device capable of performing multi-link communication with another communication device.
- Specific examples of the communication device 103 include, but are not limited to, cameras, tablets, smartphones, PCs, mobile phones, video cameras, and the like.
- the communication device 103 may be any communication device capable of performing multi-link communication with another communication device.
- the network of FIG. 1 is a network composed of one AP and one STA, but the number of APs and STAs is not limited to this.
- the communication device 102 is an AP and the communication device 103 is an STA, but the present invention is not limited to this, and the communication device 102 and the communication device 103 may be stations.
- the communication device 102 is an STA, it operates as a device having a role of constructing a wireless network for establishing a link with the communication device 103.
- FIG. 2 shows an example of hardware configurations of communication devices 102 and 103.
- the communication device 102 includes a storage unit 201, a control unit 202, a function unit 203, an input unit 204, an output unit 205, a communication unit 206, and an antenna 207.
- the storage unit 201 is composed of one or more memories such as ROM and RAM, and stores various information such as a computer program for performing various operations described later and communication parameters for wireless communication.
- ROM is an abbreviation for Read Only Memory
- RAM is an abbreviation for Random Access Memory.
- storage media such as flexible disks, hard disks, optical disks, magneto-optical disks, CD-ROMs, CD-Rs, magnetic tapes, non-volatile memory cards, and DVDs. May be used. Further, the storage unit 201 may include a plurality of memories and the like.
- the control unit 202 is composed of, for example, one or more processors such as a CPU and an MPU, and controls the entire communication device 102 by executing a computer program stored in the storage unit 201.
- the control unit 202 may control the entire communication device 102 in cooperation with the computer program stored in the storage unit 201 and the OS (Operating System). Further, the control unit 202 generates data or signals (wireless frames) to be transmitted in communication with other communication devices.
- the CPU is an abbreviation for Central Processing Unit
- MPU is an abbreviation for Micro Processing Unit.
- the control unit 202 may include a plurality of processors such as a multi-core processor, and the plurality of processors may control the entire communication device 102.
- control unit 202 controls the function unit 203 to execute predetermined processing such as wireless communication, imaging, printing, and projection.
- the functional unit 203 is hardware for the communication device 102 to execute a predetermined process.
- the input unit 204 accepts various operations from the user.
- the output unit 205 outputs various outputs to the user via the monitor screen and the speaker.
- the output by the output unit 205 may be a display on a monitor screen, an audio output by a speaker, a vibration output, or the like.
- both the input unit 204 and the output unit 205 may be realized by one module as in the touch panel.
- the input unit 204 and the output unit 205 may be integrated with the communication device 102 or may be separate from each other.
- the communication unit 206 controls wireless communication in accordance with the IEEE802.11be standard. Further, in addition to the IEEE802.11be standard, the communication unit 206 may control wireless communication conforming to another IEEE802.11 standard series or control wired communication such as a wired LAN. The communication unit 206 controls the antenna 207 to transmit and receive signals for wireless communication generated by the control unit 202.
- the communication device 102 may have a plurality of communication units 206. The communication device 102 having a plurality of communication units 206 establishes at least one link per communication unit 206 when establishing a plurality of links in multi-link communication. Alternatively, the communication device 102 may establish a plurality of links using one communication unit 206.
- the communication unit 206 executes communication via a plurality of links by switching the frequency channels that operate in time division. If the communication device 102 is compatible with the NFC standard, the Bluetooth standard, or the like in addition to the IEEE802.11be standard, wireless communication may be controlled in accordance with these communication standards. Further, when the communication device 102 can execute wireless communication conforming to a plurality of communication standards, it may be configured to have a communication unit and an antenna corresponding to each communication standard individually. The communication device 102 communicates data such as image data, document data, and video data with the communication device 103 via the communication unit 206. The antenna 207 may be configured as a separate body from the communication unit 206, or may be configured as one module together with the communication unit 206.
- Antenna 207 is an antenna capable of communication in the 2.4 GHz band, 5 GHz band, and 6 GHz band.
- the communication device 102 has one antenna, but may have different antennas for each frequency band. Further, when the communication device 102 has a plurality of antennas, the communication device 102 may have a communication unit 206 corresponding to each antenna.
- FIG. 3 shows an example of the functional configuration of the communication device 102.
- the communication device 102 includes a multi-link control unit 301, a FILS Discovery frame generation unit 302, and a Unified Probe Response frame generation unit 303.
- the communication device 102 further includes a frame transmission interval control unit 304, a Beacon frame generation unit 305, and a frame transmission / reception unit 306.
- the multi-link control unit 301 controls whether the communication device 102 performs multi-link communication or single-link communication.
- Single link communication is communication performed by the communication device 102 by establishing a connection on a single link. Whether or not the communication device 102 performs multi-link communication may be set by the user, or may be determined by the communication device 102 according to the usage status of the channel.
- the FILS Discovery frame generation unit 302 generates FILS Discovery frames according to the multi-link communication in the communication device 102 and the frequency band used by the communication device 102.
- the Unified Probe Response frame generation unit 303 generates an Integrated Probe Response frame according to the multi-link communication in the communication device 102 and the frequency band used by the communication device 102.
- the frame transmission interval control unit 304 controls the transmission interval of the Beacon frame, the FILS Discovery frame, and the Unified Probe Response frame in the communication device 102.
- the transmission interval of Beacon frames is 100 TU, and FILS Discovery frames and Unified Probe Response frames are transmitted at intervals shorter than 100 TU.
- the Beacon frame generation unit 305 generates Beacon frames.
- the Beacon frame includes an Integrated Probe Response Active subfield, which is information indicating whether or not to transmit an Integrated Probe Response frame.
- Unified Probe Responses Active subfield is included in Nightbor Report element and RNR (Reduced Neighbor Report) element.
- the Beacon frame may include an RNR element including AP information of each link constituting the multi-link communication of the communication device 102.
- the frame transmission / reception unit 306 controls transmission / reception of management frames, control frames, data frames such as Beacon frames, FILS Discovery frames, and United Probe Response frames.
- FIG. 4 shows a sequence diagram of processing executed when the communication device 102 communicates with the communication device 103 via a plurality of links.
- the processing of this sequence is started in response to the power of the communication device 102 being turned on. Alternatively, it may be started in response to the user instructing the communication device 102 to perform multi-link communication.
- the communication device 102 operates AP1 and AP2 to execute multi-link communication with the communication device 103. It should be noted that AP1 and AP2 operate in the 6 GHz band and use different frequency channels.
- the communication device 102 transmits a Beacon frame using AP2 (S401).
- the Beacon frame transmitted by S401 includes an RNR element in which information for communicating with AP1 is stored in addition to information for communicating with AP2.
- the communication device 102 uses the AP2 to transmit a FILS Discovery frame that includes information for communicating with the AP2 but does not include information for communicating with the AP1 (S402). That is, the FILS Discovery frame transmitted here does not include the RNR element.
- the communication device 102 transmits FILS Discovery frames at 20 TU intervals, but the transmission interval does not have to be 20 TU.
- the communication device 102 In the FILS Discovery frame, a bit indicating that the communication device 102 is executing multi-link communication is added so that the Beamon frame can be notified that the information of AP1 which is the information of other links is stored. You can do it.
- the communication device 102 stores the information of AP1 which is the information for communicating with another link in AP2 in the RNR element, and transmits the Beacon frame again (S403). ).
- the communication device 102 uses the AP2 has been described in this sequence, the same processing may be performed using the AP1.
- the example of storing the information for communicating with another link in the RNR element is shown in the present embodiment, it may be stored anywhere in the FILS Discovery frame and the Beamon frame.
- the communication device 102 executes multi-link communication, in addition to the information for communicating with the own link stored in the Beacon frame, communication is further performed with another link to the RNR element of the Beacon frame.
- the communication overhead becomes large.
- the communication device 102 transmits the FILS Discovery frame, but instead of at least one FILS Discovery frame, an Integrated Probe Response frame may be transmitted.
- FIG. 5 shows a flow of processing performed by the control unit 202 executing a program stored in the storage unit 201 of the communication device 102 when the communication device 102 executes multi-link communication or single-link communication. It is a flowchart.
- This flowchart starts in response to the power of the communication device 102 being turned on. Alternatively, it may be started in response to an instruction from the user to start communication to the communication device 102.
- the communication device 102 determines the operation mode of its own device to multi-link communication or single-link communication (S501). Whether the communication device 102 performs multi-link communication or single-link communication is determined by the user. Alternatively, the communication device 102 may autonomously determine whether to perform multi-link communication or single-link communication based on the state of the frequency channel and frequency band, the size of the data to be communicated, and the like. Alternatively, the AP may decide whether to perform multi-link communication or single-link communication according to the request from the STA or the communication status of the STA.
- the communication device 102 determines whether or not the AP stop instruction has been received (S502). Specifically, the communication device 102 determines whether the user has instructed to stop the operation as the AP. When the stop is instructed in S502, the communication device 102 stops the operation as an AP and ends the process of this flowchart. If the stop is not instructed in S502, the communication device 102 determines whether the own device is operating the multi-link communication (S503). Whether or not multi-link communication is in operation is determined by determination. If it is determined in S503 that the communication device 102 is executing the multi-link communication, the communication device 102 determines Yes in this step, and performs a frame transmission process in the case of executing the multi-link communication in S504.
- the communication device 102 determines whether or not a change related to the multi-link communication is instructed (S506). Specifically, the communication device 102 determines whether or not a change instruction regarding whether or not to execute multi-link communication has been received from the user. Alternatively, or in lieu of, the communication device 102 determines whether the user has received an instruction to change the frequency channel, frequency band, mode, number of links, or the like related to the multi-link communication. It should be noted that the communication device 102 may autonomously change from the state of the communication being executed, the state of the frequency channel, or the like, instead of receiving these change instructions from the user.
- the processing of S501 is performed again.
- the communication device 102 performs the processing of S502. Further, the process of S502 is not limited to this timing, and may be executed at any timing in this flowchart.
- FIG. 6 shows a flow chart of processing performed by the control unit 202 executing a program stored in the storage unit 201 of the communication device 102 when the communication device 102 executing the single link communication transmits a frame. It is a flowchart which shows.
- the communication device 102 determines whether or not the transmission interval of the FILS Discovery frame has elapsed since the previous transmission of the Beacon frame or the FILS Discovery frame (S601). When it is determined in S601 that the transmission interval has not elapsed, the communication device 102 determines whether or not the transmission interval of the Beacon frame has elapsed since the previous Beacon frame was transmitted (S602).
- the transmission interval of the Beacon frame of the communication device 102 is preset to the communication device 102 as 100 TU. Alternatively, an arbitrary transmission interval may be set by the user.
- the communication device 102 transmits a Beacon frame (S605). In S602, which proceeds to the process of S506 in FIG. 5, when it is determined that the Beacon transmission interval has not elapsed, the communication device 102 performs the process of S601 again.
- the communication device 102 determines whether the transmission interval of the Beacon frame has elapsed (S603). If it is determined in S603 that the Beacon transmission interval has not elapsed, the communication device 102 transmits a FILS Discovery frame (S604). When the communication device 102 performs the processing of S604, the communication device 102 determines S601 again. When it is determined in S603 that the Beacon transmission interval has elapsed, the communication device 102 transmits a Beacon frame in S605 and ends the processing of this flowchart.
- the FILS Discovery frame is transmitted, but the present invention is not limited to this, and the Unified Probe Response frame may be transmitted.
- the RNR element in which information for performing communication on another link is stored is not included in the FILS Discovery frame or the Beamon frame.
- FIG. 7 shows a flow chart of processing performed by the control unit 202 executing a program stored in the storage unit 201 of the communication device 102 when the communication device 102 executing the multi-link communication transmits a frame. It is a flowchart which shows.
- the communication device 102 stores the Multi link element indicating the operation information of the multi-link communication and the RNR element containing the AP information of the link other than the link for transmitting the Beacon frame in the Beacon frame (S701).
- Information for communicating with the link that transmits the Beacon frame is stored in the Event such as EHT Capacity of the Beacon frame, but it may be stored anywhere in the Beacon frame.
- the communication device 102 has a high load of communication between the communication device 102 and the communication device 103 when the RNR element including information for communicating with another link is stored in the FILS Discovery frame. Is determined (S702).
- the load of communication between the communication device 102 and the communication device 103 when the RNR element is stored in the FILS Discovery frame determines whether the FILS Discovery frame size is larger than a predetermined threshold value.
- the communication device 102 determines whether the number of links for which the communication device 102 and the communication device 103 have established a connection is larger than a predetermined threshold value.
- the communication device 102 determines in S702 whether the transmission interval of the FILS Discovery frame is smaller than a predetermined threshold value.
- the communication device 102 determines in S704 whether the transmission interval of the FILS Discovery frame has elapsed.
- the communication device 102 When it is determined by S702 that the load of communication between the communication device 102 and the communication device 103 is low, the communication device 102 stores the RNR element in the FILS Discovery frame (S703). In S702, whether to determine the FILS Discovery frame size or the number of links or the transmission interval of the FILS Discovery frame may be selected by the user or may be preset in the communication device 102. Alternatively, the communication device 102 may make three determinations, and if at least one determination result is Yes, it may be determined as Yes in this step.
- the predetermined threshold value of the FILS Discovery frame, the predetermined threshold value of the number of links, and the threshold value of the transmission interval of the FILS Discovery frame may be stored in the non-volatile memory in the communication device 102 or may be set by the user. good.
- a bit indicating that the communication device 102 is executing the multi-link communication is added so that the Beamon frame can be notified that the information for communicating with another link is included. May be.
- S704 to S708 is the same as the processing of S601 to S605 of FIG. After transmitting the Beacon frame in S708, the process proceeds to S506 in FIG.
- the FILS Discovery frame is transmitted, but the present invention is not limited to this, and the Unified Probe Response frame may be transmitted.
- the determination of S702 and the processing of S703 may be skipped.
- the information for communicating with the frame by another link is RNR. Do not store the element.
- each flowchart shown in FIGS. 5 to 7 is executed when the communication device 102 operates only in the 6 GHz band, and is not executed when the communication device 102 operates in the 2.4 GHz band and / or the 5 GHz band. May be good.
- the communication device 102 may execute the processes of FIGS. 5 to 7 based on the fact that at least one AP operates in the 6 GHz band.
- the communication device 102 may perform processing such as transmission / reception of a data frame and transmission / reception of another management frame or control frame in parallel with or between each step of FIGS. 5 to 7.
- the communication device 102 appropriately stores information for performing communication on another frequency channel in a frame transmitted at a predetermined transmission interval, and controls the transmission of the frame for communication. It becomes possible to suppress the overhead.
- FIGS. 5 to 7 may be realized by hardware.
- a dedicated circuit may be generated on the FPGA from a computer program for realizing each step, and this may be used.
- FPGA is an abbreviation for Field Programmable Gate Array.
- a Gate Array circuit may be formed in the same manner as the FPGA and realized as hardware. Further, it may be realized by ASIC (Application Specific Integrated Circuit).
- a recording medium in which the program code of the software that realizes the above functions is recorded is supplied to the system or the device, and the computer (CPU, MPU) of the system or the device reads and executes the program code stored in the recording medium. You may.
- the program code itself read from the storage medium realizes the function of the above-described embodiment, and the storage medium storing the program code constitutes the above-mentioned device.
- a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a non-volatile memory card, a ROM, a DVD, or the like can be used.
- a flexible disk for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a non-volatile memory card, a ROM, a DVD, or the like can be used.
- OS is an abbreviation for Operating System.
- the program code read from the storage medium is written to the memory provided in the function expansion board inserted in the computer or the function expansion unit connected to the computer. Then, based on the instruction of the program code, the CPU provided in the function expansion board or the function expansion unit may perform a part or all of the actual processing to realize the above-mentioned function.
- the present invention supplies a program that realizes one or more functions of the above-described embodiment to a system or device via a network or storage medium, and one or more processors in the computer of the system or device reads and executes the program. It can also be realized by the processing to be performed. It can also be realized by a circuit (for example, ASIC) that realizes one or more functions.
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Abstract
Description
第1の周波数チャネルおよび第2の周波数チャネルを介して他の通信装置と接続を確立することが可能な通信装置であって、
所定の送信間隔でBeaconフレームを送信する第1の送信手段と、
前記Beaconフレームより短い所定の送信間隔でFILS DiscoveryフレームまたはUnsolicited Probe Responseフレームを送信する第2の送信手段と、
前記第1の周波数チャネルおよび前記第2の周波数チャネルを介して前記他の通信装置と接続を確立している場合、前記第1の送信手段によって前記第1の周波数チャネルで送信される前記Beaconフレームには、前記第2の周波数チャネルで通信するための情報が含まれ、前記第2の送信手段によって前記第1の周波数チャネルで送信される前記FILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームには、前記情報が含まれないことを特徴とする。
Claims (11)
- 第1の周波数チャネルおよび第2の周波数チャネルを介して他の通信装置と接続を確立することが可能な通信装置であって、
所定の送信間隔でBeaconフレームを送信する第1の送信手段と、
前記Beaconフレームより短い所定の送信間隔でFILS DiscoveryフレームまたはUnsolicited Probe Responseフレームを送信する第2の送信手段と、
前記第1の周波数チャネルおよび前記第2の周波数チャネルを介して前記他の通信装置と接続を確立している場合、前記第1の送信手段によって前記第1の周波数チャネルで送信される前記Beaconフレームには、前記第2の周波数チャネルで通信するための情報が含まれ、前記第2の送信手段によって前記第1の周波数チャネルで送信される前記FILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームには、前記情報が含まれないことを特徴とする通信装置。 - 前記第1の周波数チャネルおよび前記第2の周波数チャネルを介して前記他の通信装置と接続を確立している場合、前記通信装置と前記他の通信装置の間の通信の負荷を判定する判定手段をさらに有し、
前記判定手段によって前記通信の負荷が高いと判定された場合、前記第1の送信手段によって前記第1の周波数チャネルで送信される前記Beaconフレームには、前記第2の周波数チャネルで通信するための情報が含まれ、前記第2の送信手段によって前記第1の周波数チャネルで送信される前記FILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームには、前記情報が含まれないことを特徴とする請求項1に記載の通信装置。 - 前記判定手段は、前記FILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームに前記情報が格納された場合の前記FILS Discoveryフレームのサイズに基づいて前記通信の負荷を判定し、
前記判定手段によって前記FILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームのサイズが所定の値より大きいと判定された場合、前記第1の送信手段によって前記第1の周波数チャネルで送信される前記Beaconフレームには、前記第2の周波数チャネルで通信するための情報が含まれ、前記第2の送信手段によって前記第1の周波数チャネルで送信される前記FILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームには、前記情報が含まれないことを特徴とする請求項2に記載の通信装置。 - 前記判定手段は、前記通信装置と前記他の通信装置が接続を確立している周波数チャネルの数に基づいて前記通信の負荷を判定し、
前記判定手段によって前記周波数チャネルの数が所定の値より多いと判定された場合、前記第1の送信手段によって前記第1の周波数チャネルで送信される前記Beaconフレームには、前記第2の周波数チャネルで通信するための情報が含まれ、前記第2の送信手段によって前記第1の周波数チャネルで送信される前記FILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームには、前記情報が含まれないことを特徴とする請求項2または3に記載の通信装置。 - 前記判定手段は、前記第2の送信手段によって送信される前記FILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームの送信間隔に基づいて通信の負荷を判定し、
前記判定手段によって前記FILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームの送信間隔が所定の値より小さいと判定された場合、前記第1の送信手段によって前記第1の周波数チャネルで送信される前記Beaconフレームには、前記第2の周波数チャネルで通信するための情報が含まれ、前記第2の送信手段によって前記第1の周波数チャネルで送信される前記FILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームには、前記情報が含まれないことを特徴とする請求項2から4の何れか1項に記載の通信装置。 - 前記情報は前記BeaconフレームのRNR(Reduced Neighbor Report) elementに含まれることを特徴とする請求項1から5の何れか1項に記載の通信装置。
- 前記FILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームや前記Beaconフレームには、当該フレームを送信する通信装置が構築するネットワークの情報が含まれることを特徴とする請求項1から6の何れか1項に記載の通信装置。
- 前記第1の周波数チャネルおよび前記第2の周波数チャネルは、2.4GHz帯、5GHz帯、および6GHz帯の何れかの周波数帯のチャネルであることを特徴とする請求項1から7の何れか1項に記載の通信装置。
- 前記通信装置は、IEEE802.11規格シリーズに準拠したAP(Access Point)として動作することを特徴とする請求項1から8の何れか1項に記載の通信装置。
- 第1の周波数チャネルおよび第2の周波数チャネルを介して他の通信装置と接続を確立することが可能な通信装置の通信方法であって、
所定の送信間隔でBeaconフレームを送信する第1の送信工程と、
前記Beaconフレームより短い所定の送信間隔でFILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームを送信する第2の送信工程と、
前記第1の周波数チャネルおよび前記第2の周波数チャネルを介して前記他の通信装置と接続を確立している場合、前記第1の送信工程によって前記第1の周波数チャネルで送信される前記Beaconフレームには、前記第2の周波数チャネルで通信するための情報が含まれ、前記第2の送信工程によって前記第1の周波数チャネルで送信される前記FILS Discoveryフレームまたは前記Unsolicited Probe Responseフレームには、前記情報が含まれないことを特徴とする通信装置の通信方法。 - コンピュータを請求項1から9の何れか1項に記載の通信装置の各手段として機能させるためのプログラム。
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