Communication device, control method, and program

Abstract

To enable a communication device capable of communicating using a bandwidth of 640 MHz to communicate information about Spatial Reuse by means of an appropriate frame structure.SOLUTION: The communication device transmits a U-SIG and an HR TB PPDU. The U-SIG includes a Spatial Reuse1 subfield that indicates information about a Spatial Reuse in a first 320 MHz sub-band and a Spatial Reuse2 subfield that indicates information about a Spatial Reuse in a second 320 MHz sub-band when a bandwidth of 640 MHz is used as the bandwidth. The HR TB PPDU includes an HR-STF after an HR-SIG and an HR-LTF after the HR-STF.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a communication device that communicates data by wireless communication. [Background technology]

[0002] The IEEE802.11 series of standards is known as a WLAN communication standard established by the IEEE (Institute of Electrical and Electronics Engineers). WLAN is an abbreviation for Wireless Local Area Network. The IEEE802.11 series of standards includes the IEEE802.11a / b / g / n / ac / ax / be standards.

[0003] Patent Document 1 discloses that the IEEE802.11ax standard performs wireless communication using orthogonal frequency-division multiple access (OFDMA). The IEEE802.11ax standard achieves high peak throughput by performing wireless communication using OFDMA. In addition, the IEEE802.11ax standard introduces a function called spatial reuse, which grasps the propagation conditions of other wireless communications and allows simultaneous communication if it does not affect the communication. Furthermore, in the IEEE802.11be standard, which is the successor standard to the IEEE802.11ax standard, the radio bandwidth is extended to 320 MHz in order to improve throughput, and the spatial reuse function is also extended to 320 MHz.

[0004] To further improve throughput, the IEEE is considering expanding radio bandwidth beyond 320 MHz. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-50133 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, until the IEEE802.11be standard, the radio bandwidth was limited to a maximum of 320 MHz, so there was no appropriate frame structure capable of communicating information regarding spatial reuse when communicating using a bandwidth exceeding 320 MHz, such as 640 MHz.

[0007] An object of the present invention is to enable a communication device capable of communicating using a wider bandwidth to appropriately communicate information relating to spatial reuse. [Means for solving the problem]

[0008] A communication device, comprising: L-STF (Legacy-Short Training Field) and L-LTF (Legacy-Long Training Field) after the L-STF; L-SIG (Legacy-Signal) after the L-LTF; A field following the L-SIG, the field including a Spatial Reuse 1 subfield and a Spatial Reuse 2 subfield; When the communication device uses a bandwidth of 640 MHz as a bandwidth, the Spatial Reuse 1 subfield indicates information about Spatial Reuse in the first 320 MHz subband, and the Spatial Reuse 2 subfield indicates information about Spatial Reuse in the second 320 MHz subband. U-SIG (Universal Signal); HR-STF (High Reliability-Short Training Field) after the HR-SIG; A communication device comprising a transmitting means for transmitting an HR TB (Trigger-Based) PPDU (Physical Layer Protocol Data Unit) including an HR-LTF (High Reliability-Long Training Field) following the HR-STF. Effect of the Invention

[0009] According to the present invention, a communication device capable of communicating using a wider bandwidth can appropriately communicate information relating to spatial reuse. [Brief description of the drawings]

[0010] [Figure 1] 1 is a diagram illustrating an example of the configuration of a wireless communication system according to an embodiment of the present invention. [Diagram 2] FIG. 1 is a diagram illustrating a hardware configuration of a communication device 103. [Diagram 3] 13 is a diagram showing an example of a PHY frame configuration of an HR TB PPDU transmitted by a communication device 103. FIG. [Figure 4] A figure showing an example of the meanings corresponding to the values ​​of each subfield of Spatial Reuse 1 and 2 of U-SIG. [Diagram 5] A diagram showing an example of the relationship between Spatial Reuse 1 and 2 subfields of U-SIG-1 and subbands for each usage bandwidth. [Figure 6] FIG. 2 is a diagram illustrating an example of the configuration of a Trigger Frame. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Note that the configurations shown in the following embodiments are merely examples, and the present invention is not limited to the illustrated configurations.

[0012] 1 shows an example of the configuration of a wireless communication system according to this embodiment. BSS 101 is a network managed by communication device 102, which is an access point (AP). Communication device 103 is a station (STA) participating in BSS 101. BSS 106 is a network managed by communication device 104, which is an AP, and communication device 105 participates in BSS 106. Note that BSS is an abbreviation for Basic Service Set.

[0013] Moreover, each communication device is configured to be able to execute wireless communication conforming to the successor standard to the IEEE802.11be standard, which targets a maximum transmission speed of 46.08 Gbps, and which targets a maximum transmission speed of 90 Gbps to 100 Gbps or more. This successor standard to 802.11be sets support for high reliability communication and low latency communication as new goals to be achieved. In light of the above, in this embodiment, the successor standard to IEEE802.11be, which targets a maximum transmission speed of 90 Gbps to 100 Gbps or more, is provisionally named IEEE802.11HR (High Reliability).

[0014] The name IEEE802.11HR is a convenient name given to the goals and features of the successor standard, and may be a different name once the standard is finalized. However, it should be noted that this specification and the appended claims are essentially applicable to all successor standards that are successors to the 802.11be standard and can support wireless communication. IEEE stands for Institute of Electrical and Electronics Engineers. Each communication device can communicate in the 2.4 GHz, 5 GHz, and 6 GHz frequency bands. Each communication device can communicate using the bandwidths of 20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz, 480 MHz, 560 MHz, and 640 MHz.

[0015] The communication devices 102 to 105 can realize multi-user (MU) communication in which signals of multiple users are multiplexed by performing OFDMA communication conforming to the IEEE802.11HR standard. OFDMA is an abbreviation for Orthogonal Frequency Division Multiple Access. In OFDMA communication, a part of the divided frequency band (RU, Resource Unit) is assigned to each STA so as not to overlap with each other, and the carrier waves of each STA are orthogonal. Therefore, the AP can communicate with multiple STAs in parallel.

[0016] Furthermore, the communication devices 102 to 105 can realize MU communication by MU MIMO (Multi User Multiple-Input and Multiple-Output) communication. In this case, the communication device 102 has multiple antennas, and can realize simultaneous communication with multiple STAs by allocating one or more antennas to each of the other communication devices. The communication device 102 can transmit radio waves to multiple STAs simultaneously by adjusting the radio waves transmitted to each of the communication devices 103 to 105 so as not to interfere with each other.

[0017] The communication devices 102 to 105 also have a function called spatial reuse, which grasps the propagation conditions of other wireless communication, and allows simultaneous communication if it does not affect communication. There are two types of spatial reuse: OBSS PD (Packet Detect)-based and PSR (Parameterized Spatial Reuse)-based. OBSS is an abbreviation for overlapping basic service set. In OBSS PD-based, the communication device controls the carrier sense threshold to be changed based on whether the received packet is a packet from the BSS to which the device belongs, or a packet from another BSS (OBSS) to which the device does not belong. Specifically, the communication device controls the carrier sense threshold to be increased in the case of a packet from another BSS to which the device does not belong. This allows the communication of the device to be performed even when a packet of another BSS to which the device does not belong is being communicated, which would have previously been suppressed. In addition, in PSR-based, the communication device transmits from the device with a transmission power that does not affect the reception operation of another BSS to which the device does not belong. Note that PSR-based can be executed only if another BSS to which the device does not belong permits its execution. This allows the device to transmit data even while an AP of another BSS is receiving data.

[0018] Although the communication devices 102 to 105 are described as being compatible with the IEEE802.11HR standard, they may also be compatible with a legacy standard that is a standard that precedes the IEEE802.11HR standard. Specifically, the communication devices 102 to 105 may be compatible with at least one of the IEEE802.11a / b / g / n / ac / ax / be standards. In addition to the IEEE802.11 series standards, they may also be compatible with other communication standards such as Bluetooth (registered trademark), NFC, UWB, ZigBee, and MBOA. UWB stands for Ultra Wide Band, and MBOA stands for Multi Band OFDM Alliance. NFC stands for Near Field Communication. UWB includes wireless USB, wireless 1394, WiNET, and the like. They may also be compatible with a communication standard for wired communication such as wired LAN.

[0019] Specific examples of the communication devices 102 and 104 include, but are not limited to, a wireless LAN router and a PC. The communication devices 102 and 104 may be information processing devices such as a wireless chip capable of performing wireless communication conforming to the IEEE802.11HR standard. Specific examples of the communication devices 103 and 105 include, but are not limited to, a camera, a tablet, a smartphone, a PC, a mobile phone, a video camera, a projector, etc. The communication devices 103 and 105 may be information processing devices such as a wireless chip capable of performing wireless communication conforming to the IEEE802.11HR standard. Each BSS in 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 information processing device such as a wireless chip has an antenna for transmitting the generated signal.

[0020] 2 shows a hardware configuration of the communication device 103 according to the present invention. The communication device 103 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.

[0021] The storage unit 201 is composed of memories such as ROM and RAM, and stores various information such as computer programs for performing various operations described below and communication parameters for wireless communication. ROM stands for Read Only Memory, and RAM stands for Random Access Memory. Note that, in addition to memories such as ROM and RAM, 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 as the storage unit 201. Furthermore, the storage unit 201 may include multiple memories.

[0022] The control unit 202 is configured with one or more processors such as a CPU or an MPU, and controls the entire communication device 103 by executing a computer program stored in the storage unit 201. The control unit 202 may control the entire communication device 103 in cooperation with the computer program stored in the storage unit 201 and an OS (Operating System). The control unit 202 also generates data and signals to be transmitted in communication with other communication devices. The CPU stands for Central Processing Unit, and the MPU stands for Micro Processing Unit. The control unit 202 may also include multiple processors such as a multi-core processor, and the entire communication device 103 may be controlled by the multiple processors.

[0023] Furthermore, the control unit 202 controls the functional unit 203 to execute predetermined processes such as wireless communication, imaging, printing, projection, etc. The functional unit 203 is hardware that enables the communication device 103 to execute predetermined processes.

[0024] The input unit 204 receives various operations from the user. The output unit 205 outputs various types of information to the user via a monitor screen or a speaker. Here, the output by the output unit 205 may be a display on a monitor screen, a voice output by a speaker, a vibration output, or the like. Note that both the input unit 204 and the output unit 205 may be realized by one module, such as a touch panel. Also, the input unit 204 and the output unit 205 may be integrated with the communication device 103, or may be separate from it.

[0025] The communication unit 206 controls wireless communication conforming to the IEEE802.11HR standard. The communication unit 206 may control wireless communication conforming to other IEEE802.11 series standards in addition to the IEEE802.11HR standard, or control wired communication such as wired LAN. The communication unit 206 controls the antenna 207 to transmit and receive wireless signals for wireless communication generated by the control unit 202. If the communication device 103 supports the NFC standard, Bluetooth standard, or the like in addition to the IEEE802.11HR standard, the communication unit 206 may control wireless communication conforming to these communication standards. If the communication device 103 can perform wireless communication conforming to a plurality of communication standards, the communication unit 206 and the antenna 207 may be individually provided to support each of the communication standards. The communication device 103 communicates data such as image data, document data, and video data with the communication device 102 via the communication unit 206. The antenna 207 may be configured as a separate unit from the communication unit 206, or may be configured together with the communication unit 206 as a single module.

[0026] The communication devices 102, 104, and 105 may also have the same hardware configuration as the communication device 103.

[0027] Next, PSR-based SR will be explained with reference to FIG.

[0028] The communication device 102 communicates a Trigger Frame (TF), which is a control signal that prompts transmission of an uplink signal (e.g., an OFDMA signal), to the communication device 103 participating in the BSS 101. Note that, in a TF transmitted by the communication device 102, if the UL Spatial Reuse Field of the Common Info Field contains a value of 1 to 14, the PPDU containing the TF is called a PSRR PPDU. Also, PSRR PPDU is an abbreviation for Parameterized Spatial Reuse Reception (PSRR) Physical Layer (PHY) Protocol Data Unit (PPDU). Also, the communication device 102 generates a PSRR PPDU that includes information about spatial reuse in the TF to be transmitted, and can notify surrounding devices of information about spatial reuse by transmitting the PSRR PPDU.

[0029] The communication device 103 transmits an HR TB PPDU as a response to the received TF. The communication device 103 can notify surrounding devices of information about spatial reuse by including information about spatial reuse in the HR TB PPDU to be transmitted. Details of the HR TB PPDU will be described later.

[0030] In PSR-based SR, a communication device acquires an upper limit of the transmission power of its own signal based on information about Spatial Reuse received from a device of another BSS different from the own device. Then, when transmission is possible, this is a technology for reusing wireless resources by transmitting a signal during a period when a device participating in another network is transmitting an uplink signal. For example, when the communication device 104 recognizes that uplink communication is being performed in another BSS, it cannot normally transmit its own signal. However, the communication device 104 of this embodiment is equipped with Spatial Reuse technology. Therefore, it becomes possible to select to transmit its own signal during a period when another BSS is performing uplink communication. This allows wireless resources to be reused, improving communication efficiency.

[0031] FIG. 6 shows an example of the configuration of a TF with which the communication device 102 communicates in this embodiment.

[0032] TF is a control signal that prompts other devices belonging to the network formed by the device transmitting the TF to transmit a signal to the device transmitting the TF. The Common Info field of this TF has a UL Spatial Reuse subfield. The UL Spatial Reuse subfield has Spatial Reuse1, Spatial Reuse2, Spatial Reuse3, and Spatial Reuse4 subfields that can include information about spatial reuse. Each of the Spatial Reuse1, 2, 3, and 4 subfields is 4 bits.

[0033] In this way, the communication device 102 can use each of the subfields of Spatial Reuse 1, 2, 3, and 4 to notify other communication devices of information related to Spatial Reuse.

[0034] FIG. 4 shows information corresponding to the values ​​of each of the subfields of Spatial Reuse 1, 2, 3, and 4.

[0035] A subfield value of 0 means PSR_DISALLOW, which means that PSR-based spatial reuse is prohibited. A subfield value of 15 means PSR_AND_NON_SRG_OBSS_PD_PROHIBITED, which means that PSR-based and OBSS PD-based spatial reuse are prohibited. When the subfield value is 1 to 14, the device that executes PSR-based spatial reuse determines the upper limit of transmission power based on the PSR value indicated by the subfield.

[0036] This TF also has a Special User Info field as shown in Figure 6. The Special User Info field is a User Info field in which the AID12 subfield contains a value of 2007. The Special User Info field has an HR Spatial Reuse1 subfield and an HR Spatial Reuse2 subfield. The HR Spatial Reuse1 and 2 subfields each consist of 4 bits and can contain information related to spatial reuse. Figure 4 also shows information corresponding to each value of the HR Spatial Reuse1 and 2 subfields.

[0037] The HR Spatial Reuse 1 and 2 subfields correspond to subbands of a bandwidth used in communication between the communication device 102 and the communication device 103. For example, when a bandwidth of 80 MHz is used in communication between the communication device 102 and the communication device 103, the HR Spatial Reuse 1 and 2 subfields correspond to 40 MHz subbands, respectively.

[0038] The relationship between the HR Spatial Reuse 1 and 2 subfields and the subbands is the same as the relationship between the Spatial Reuse 1 and 2 subfields and the subbands shown in FIG.

[0039] For example, when the bandwidth used is 20 MHz, the HR Spatial Reuse 1 subfield indicates information about spatial reuse in the first 20 MHz subband, and the HR Spatial Reuse 2 subfield contains the same value as the Spatial Reuse 1 subfield.

[0040] When the bandwidth used is 40 MHz, the HR Spatial Reuse1 subfield indicates information about spatial reuse in the first 20 MHz subband. The HR Spatial Reuse2 subfield indicates information about spatial reuse in the second 20 MHz subband. However, when the frequency band used is 2.4 GHz, the same value as the HR Spatial Reuse1 subfield is entered.

[0041] When the used bandwidth is 80 MHz, the HR Spatial Reuse 1 subfield indicates information about spatial reuse in the first 40 MHz subband, and the HR Spatial Reuse 2 subfield indicates information about spatial reuse in the second 40 MHz subband.

[0042] When the used bandwidth is 160 MHz, the HR Spatial Reuse 1 subfield indicates information about spatial reuse in the first 80 MHz subband, and the HR Spatial Reuse 2 subfield indicates information about spatial reuse in the second 80 MHz subband.

[0043] When the used bandwidth is 320 MHz, the HR Spatial Reuse 1 subfield indicates information about spatial reuse in the first 160 MHz subband, and the HR Spatial Reuse 2 subfield indicates information about spatial reuse in the second 160 MHz subband.

[0044] When the used bandwidth is 480 MHz, the HR Spatial Reuse 1 subfield indicates information about spatial reuse in the first 240 MHz subband, and the HR Spatial Reuse 2 subfield indicates information about spatial reuse in the second 240 MHz subband.

[0045] When the used bandwidth is 560 MHz, the HR Spatial Reuse 1 subfield indicates information about spatial reuse in the first 280 MHz subband, and the HR Spatial Reuse 2 subfield indicates information about spatial reuse in the second 280 MHz subband.

[0046] When the used bandwidth is 640 MHz, the HR Spatial Reuse 1 subfield indicates information about spatial reuse in the first 320 MHz subband, and the HR Spatial Reuse 2 subfield indicates information about spatial reuse in the second 320 MHz subband.

[0047] In this way, the communication device 102 can notify other communication devices of information related to spatial reuse by using each of the subfields of HR Spatial Reuse 1 and 2.

[0048] As described above, when transmitting a PSRR PPDU, the communication device 102, which is an AP, can enter values ​​of 1 to 14 in the Spatial Reuse 1-4 fields and HR Spatial Reuse 1 and 2 subfields of the TF. The values ​​of 1 to 14 indicate the PSR value, as shown in Fig. 4. The communication device 102 also acquires the PSR value based on the transmission power of the PSRR PPDU that transmits the TF, the expected reception power of the TB PPDU that is received, and the expected packet error rate of the TB PPDU. Then, based on the acquired PSR value and Fig. 4, the communication device 102 selects values ​​of 1 to 14 to be included in the Spatial Reuse 1-4 fields and HR Spatial Reuse 1 and 2 subfields of the TF to be transmitted.

[0049] Next, the communication device 103 that receives the TF from the communication device 102 communicates an HR TB PPDU. The HR TB PPDU is a signal transmitted by the communication device 103 that joins the network constituted by the communication device 102 that received the trigger frame transmitted from the communication device 102 that is the AP. The HR TB PPDU is used when transmitting as a response to the trigger frame.

[0050] 3 shows an example of a PHY frame configuration of an HR TB PPDU communicated by the communication device 103 in this embodiment. Note that TB is an abbreviation for Trigger-Based, and PPDU is an abbreviation for Physical Layer (PHY) Protocol Data Unit.

[0051] This frame is composed of L-STF 301, L-LTF 302, L-SIG 303, RL-SIG 304, U-SIG 305, HR-STF 306, and HR-LTF 307 from the beginning. In addition, HR-LTF 307 is followed by Data Field 308 and Packet Extension 309. The order of the fields of the HR TB PPDU is not limited to this. STF stands for Short Training Field, LTF stands for Long Training Field, and SIG stands for Signal. In addition, L- stands for Legacy, and for example, L-STF stands for Legacy Short Training Field. Similarly, HR stands for High Reliability, and for example, HR-STF stands for High Reliability Short Training Field. In addition, RL-SIG stands for Repeated Legacy Signal, and U-SIG stands for Universal Signal.

[0052] L-STF301, L-LTF302, and L-SIG303 are backward compatible with the IEEE802.11a / b / g / n / ac / ax / be standards, which are legacy standards established before the IEEE802.11HR standard. That is, L-STF301, L-LTF302, and L-SIG303 are legacy fields that can be decoded by communication devices compatible with IEEE802.11 series standards prior to the IEEE802.11be standard.

[0053] L-STF301 is used for detecting wireless packet signals, automatic gain control (AGC), timing detection, etc. L-LTF302 is used for high-precision frequency and time synchronization and acquiring propagation channel information (CSI, Channel State Information). L-SIG303 is used to transmit control information including data transmission rate and packet length information. RL-SIG is used to identify that the standard is a later version of the IEEE802.11ac standard. RL-SIG304 may be omitted.

[0054] HR-STF 306 and HR-LTF 307 are fields that can be decoded by a communication device that complies with the IEEE802.11HR standard.

[0055] L-STF301, L-LTF302, L-SIG303, RL-SIG304, U-SIG305, HR-STF306, and HR-LTF307 are collectively referred to as the PHY preamble.

[0056] U-SIG305 is divided into two fields: the U-SIG-1 field and the U-SIG-2 field.

[0057] The U-SIG-1 field consists of the subfields shown in Table 1.

[0058] [Table 1]

[0059] The U-SIG-2 field consists of the subfields shown in Table 2.

[0060] [Table 2]

[0061] The communication device 103 indicates information about spatial reuse using each of the subfields of Spatial Reuse 1 and 2.

[0062] FIG. 4 shows the meanings of the values ​​of each subfield of Spatial Reuse 1 and 2.

[0063] A subfield value of 0 means PSR_DISALLOW, which means that PSR-based spatial reuse is prohibited. A subfield value of 15 means PSR_AND_NON_SRG_OBSS_PD_PROHIBITED, which means that PSR-based and OBSS PD-based spatial reuse are prohibited. When the subfield value is 1 to 14, the device that executes PSR-based spatial reuse determines the upper limit of transmission power based on the PSR value indicated by the subfield.

[0064] The Spatial Reuse 1 and 2 subfields correspond to subbands of a bandwidth used in communication between the communication device 102 and the communication device 103. For example, when a bandwidth of 80 MHz is used in communication between the communication device 102 and the communication device 103, the Spatial Reuse 1 and 2 subfields correspond to 40 MHz subbands, respectively.

[0065] FIG. 5 shows the relationship between the Spatial Reuse 1 and 2 subfields and the subbands for each bandwidth used.

[0066] When the bandwidth used is 20 MHz, the Spatial Reuse 1 subfield indicates information about spatial reuse in the first 20 MHz subband, and the Spatial Reuse 2 subfield contains the same value as the Spatial Reuse 1 subfield.

[0067] When the bandwidth used is 40 MHz, the Spatial Reuse 1 subfield indicates information about spatial reuse in the first 20 MHz subband. The Spatial Reuse 2 subfield indicates information about spatial reuse in the second 20 MHz subband. However, when the frequency band used is 2.4 GHz, the same value as the Spatial Reuse 1 subfield is entered.

[0068] When the used bandwidth is 80 MHz, the Spatial Reuse 1 subfield indicates information about spatial reuse in the first 40 MHz subband, and the Spatial Reuse 2 subfield indicates information about spatial reuse in the second 40 MHz subband.

[0069] When the used bandwidth is 160 MHz, the Spatial Reuse 1 subfield indicates information about spatial reuse in the first 80 MHz subband, and the Spatial Reuse 2 subfield indicates information about spatial reuse in the second 80 MHz subband.

[0070] When the used bandwidth is 320 MHz, the Spatial Reuse 1 subfield indicates information about spatial reuse in the first 160 MHz subband, and the Spatial Reuse 2 subfield indicates information about spatial reuse in the second 160 MHz subband.

[0071] When the used bandwidth is 480 MHz, the Spatial Reuse 1 subfield indicates information about spatial reuse in the first 240 MHz subband, and the Spatial Reuse 2 subfield indicates information about spatial reuse in the second 240 MHz subband.

[0072] When the used bandwidth is 560 MHz, the Spatial Reuse 1 subfield indicates information about spatial reuse in the first 280 MHz subband, and the Spatial Reuse 2 subfield indicates information about spatial reuse in the second 280 MHz subband.

[0073] When the used bandwidth is 640 MHz, the Spatial Reuse 1 subfield indicates information about spatial reuse in the first 320 MHz subband, and the Spatial Reuse 2 subfield indicates information about spatial reuse in the second 320 MHz subband.

[0074] In this way, the communication device 103, which is an STA, can notify other communication devices of information related to spatial reuse by generating and transmitting an HR TB PPDU including information related to spatial reuse.

[0075] Furthermore, the communication device 104, which is an AP, can obtain information regarding the use of spatial reuse by the communication device 103 by receiving an HR TB PPDU including Spatial Reuse 1 and 2 subfields from the communication device 103.

[0076] Note that the Spatial Reuse 1 and 2 subfields are fields included in the HR TB PPDU, and are not included in other PPDUs. Specifically, the Spatial Reuse 1 and 2 subfields are not included in the HR MU PPDU communicated when performing MU communication.

[0077] In this embodiment, the PHY frame of the HR TB PPDU includes a legacy field that can be decoded by a communication device that supports IEEE802.11 series standards before the IEEE802.11be standard, but this is not limited to the above. Specifically, the PHY frame of the HR TB PPDU may be configured not to include L-STF, L-LTF, L-SIG, and RL-SIG. In this case, the PHY frame of the HR TB PPDU may be configured from the beginning by HR-STF, HR-LTF, U-SIG, HR-LTF, a data field, and a packet extension. Note that the HR-LTF following the U-SIG field may be omitted. For example, when the communication device 103 communicates in the 6 GHz band, a communication device that supports only standards before the IEEE802.11ax standard does not receive a signal, so it may communicate using an HR TB PPDU that does not include a legacy field.

[0078] Furthermore, the names of each field, bit positions, and bit numbers used in this embodiment are not limited to those described in this embodiment, and similar information may be stored in the PHY frame with different field names, different positions, and different bit numbers.

[0079] In addition, the description of the character string portion corresponding to the standard name constituting the field name including the same character string as the standard name represented by the name of the standard such as IEEE802.11HR, HR-SIG, HR-STF, HR-LTF, HR-SIG MCS, HR Spatial Reuse, etc. is not limited to this. For example, it may be HRL (High Reliability). It may also be HRW (High Reliability Wireless). It may also be VHT (Very High Reliability). It may also be EHR (Extremely High Reliability). It may also be UHR (Ultra High Reliability). It may also be LL (Low Latency). It may also be VLL (Very Low Latency). It may also be ELL (Extremely Low Latency). It may also be ULL (Ultra Low Latency). It may also be HRLL (High Reliable and Low Latency). It may also be URLL (Ultra-Reliable and Low Latency). Alternatively, it may be URLLC (Ultra-Reliable and Low Latency Communications). Alternatively, it may be another name. For example, if it is UHR, the field name will be a field name composed of a character string corresponding to the standard name, such as UHR-SIG, UHR-STF, UHR-LTF, UHR-SIG MCS, etc., which imitates the standard.

[0080] Although the embodiments have been described above in detail, the present invention can be embodied as, for example, a system, an apparatus, a method, a program, or a recording medium (storage medium), etc. Specifically, the present invention may be applied to a system composed of multiple devices (for example, a host computer, an interface device, an imaging device, a web application, etc.), or may be applied to an apparatus composed of a single device.

[0081] The present invention can also be realized by a process in which a program for implementing one or more of the functions of the above-described embodiments is supplied to a system or device via a network or a storage medium, and one or more processors in a computer of the system or device read and execute the program. The present invention can also be realized by a circuit (e.g., ASIC) that implements one or more of the functions.

[0082] The disclosure of each of the above-mentioned embodiments includes the following configurations.

[0083] (Configuration 1) A communication device, comprising: L-STF (Legacy-Short Training Field) and L-LTF (Legacy-Long Training Field) after the L-STF; L-SIG (Legacy-Signal) after the L-LTF; A field following the L-SIG, the field including a Spatial Reuse 1 subfield and a Spatial Reuse 2 subfield; When the communication device uses a bandwidth of 640 MHz as a bandwidth, the Spatial Reuse 1 subfield indicates information about Spatial Reuse in the first 320 MHz subband, and the Spatial Reuse 2 subfield indicates information about Spatial Reuse in the second 320 MHz subband. U-SIG (Universal Signal); HR-STF (High Reliability-Short Training Field) after the HR-SIG; A communication device comprising a transmitting means for transmitting an HR TB (Trigger-Based) PPDU (Physical Layer Protocol Data Unit) including an HR-LTF (High Reliability-Long Training Field) following the HR-STF.

[0084] (Configuration 2) 2. The communication device according to configuration 1, wherein the transmitting means includes an antenna used for transmitting the HR TB PPDU.

[0085] (Configuration 3) A receiving means for receiving a trigger frame from another communication device; 3. The communication device according to claim 1, wherein the transmitting means transmits the HR TB PPDU to the other communication device when the receiving means receives the trigger frame.

[0086] (Configuration 4) 4. The communication device according to any one of configurations 1 to 3, wherein the transmitting means transmits a PPDU that does not include the Spatial Reuse 1 and the Spatial Reuse 2 when transmitting a PPDU different from the HR TB PPDU.

[0087] (Configuration 5) 5. The communication device according to any one of configurations 1 to 4, wherein the transmitting means transmits the EHT TB PPDU in compliance with the IEEE 802.11 EHT standard. [Explanation of symbols]

[0088] 201 Storage section 202 Control section 203 Functional Department 204 Input section 205 Output section 206 Communications Department 207 Antenna

Claims

1. A communication device, comprising communication means for communicating a Physical Layer (PHY) Protocol Data Unit (PPDU) having a preamble and a data field, wherein the preamble includes a U-SIG (Universal Signal) field including a Spatial Reuse1 subfield and a Spatial Reuse2 subfield, wherein when the communication device uses a bandwidth of 640 MHz as the bandwidth, the Spatial Reuse1 subfield can indicate information regarding Spatial Reuse in the first 320 MHz subband in the bandwidth, and wherein when the communication device uses a bandwidth of 640 MHz as the bandwidth, the Spatial Reuse2 subfield can indicate information regarding Spatial Reuse in the second 320 MHz subband in the bandwidth. A communication device characterized by the above.

2. The preamble includes a first STF (Short Training Field), a first LTF (Long Training Field) after the first STF, a first SIG (Signal) after the first LTF, a second STF after the first SIG, and a second LTF after the second STF, wherein the U-SIG is included after the first SIG in the preamble. The communication device according to claim 1, characterized by the above.

3. The PPDU is a TB (Trigger-Based) PPDU. The communication device according to claim 1, characterized by the above.

4. The communication device further includes an antenna used by the communication means for communicating the TB PPDU. The communication device according to claim 3, characterized by the above.

5. The communication device further includes receiving means for receiving a trigger frame from another communication device, and the communication means transmits the TB PPDU to the other communication device as a response to the trigger frame received by the receiving means. The communication device according to claim 3, characterized by the above.

6. When the communication means transmits a PPDU different from the TB PPDU, the Spatial Reuse1 subfield and the Spatial Reuse2 subfield are not included. The communication device according to claim 3, characterized in that...

7. The TB PPDU is an EHT TB PPDU compliant with the IEEE 802.11 EHT standard The communication device according to claim 3, characterized in that...

8. A control method for a communication device, comprising: a communication step of communicating a Physical Layer (PHY) Protocol Data Unit (PPDU) having a preamble and a data field; the preamble includes a U-SIG (Universal Signal) field including a Spatial Reuse1 subfield and a Spatial Reuse2 subfield; when the communication device uses a bandwidth of 640 MHz as the bandwidth, the Spatial Reuse1 subfield can indicate information related to Spatial Reuse in the first 320 MHz subband in the bandwidth; when the communication device uses a bandwidth of 640 MHz as the bandwidth, the Spatial Reuse2 subfield can indicate information related to Spatial Reuse in the second 320 MHz subband in the bandwidth A control method for a communication device, characterized in that...

9. A program for causing a computer to operate as each means of the communication device according to any one of claims 1 to 7.

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