COMMUNICATION DEVICE, COMMUNICATION METHOD, AND PROGRAM

Abstract

To allow usage of Preamble Puncturing in wireless LAN communication even in a frequency band width larger than 160 MHz.SOLUTION: A communication device capable of implementing wireless communication compatible to IEEE802.11 standard includes transmission means for transmitting a wireless frame having a preamble and data field of a physical layer (PHY). The preamble includes an L-STF, L-LTF, L-SIG, EHT-SIG-A, EHT-STF, and EHT-LTF. The EHT-SIG-A includes information on Preamble Puncturing when the frequency band width used by the communication device is 320 MHz.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a communication device, a communication method, and a program for performing wireless communication. [Background technology]

[0002] In recent years, wireless local area network (WLAN) technology has achieved improved throughput for data communications, and various technological developments are currently being actively carried out.

[0003] The IEEE802.11 series of standards is known as one of the WLAN communication standards, and includes standards such as IEEE802.11a / b / g / n / ac / ax. The latest standard, IEEE802.11ax, uses OFDMA (Orthogonal Frequency-Division Multiple Access) technology. This not only achieves a high peak throughput of up to 9.6 gigabits per second (Gbps), but also improves communication speeds under congested conditions (see Patent Document 1). In addition, the IEEE802.11be standard is being considered as a successor standard aiming for even higher throughput.

[0004] As one of the measures aimed at improving throughput as part of IEEE802.11be, consideration is being given to expanding the maximum radio frequency bandwidth from the current 160 MHz to 320 MHz.

[0005] Furthermore, in order to use frequency bands more efficiently, the use of a technology called Preamble Puncturing is being considered. This is a technology that, when some of the frequency bandwidths being used cannot be used, allows communication to be carried out using the remaining frequency bandwidth other than the unavailable frequency bandwidth. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] US Patent Application Publication No. 2018 / 50133 Summary of the Invention [Problem to be solved by the invention]

[0007] As described above, in IEEE802.11be, the expansion of the available frequency bandwidth to 320 MHz is being considered. However, in the conventional wireless LAN standard IEEE802.11ax, preamble puncturing can only be used up to a bandwidth of 160 MHz. Therefore, the present invention aims to make it possible to use preamble puncturing in wireless LAN communication even in frequency bandwidths larger than 160 MHz. [Means for solving the problem]

[0008] In view of the above problems, a communication device according to one aspect of the present invention is a communication device based on the IEEE 802.11 standard. A communication device capable of wireless communication, comprising: a physical layer (PHY) preamble and data frame; The preamble includes a transmission means for transmitting a radio frame having a L-STF (Legacy Short Training Field) and a L-LTF ( Legacy Long Training Field) and L-SIG (Legac y Signal Field), The preamble has a Repeated Legacy Signal Field (RL-SIG), an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF), and in the preamble, the EHT-STF is located after the L-SIG, and a signal field having a first field group and a second field group is further included between the L-SIG and the EHT-STF, and the first field group includes a field consisting of three consecutive bits indicating information on a frequency bandwidth used for communication and a field consisting of six consecutive bits indicating information on a BSS color, and the second field group includes a field consisting of a predetermined number of consecutive bits indicating information on preamble puncturing and a field consisting of four consecutive bits used for CRC, and when the predetermined number of consecutive bits in the field indicating the information on preamble puncturing are all set to a predetermined value, it indicates that puncturing will not be performed in communication of the radio frame. Effect of the Invention

[0009] According to the present invention, preamble puncturing can be used in wireless LAN communications even in frequency bandwidths larger than 160 MHz. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a diagram showing an example of a network configuration according to an embodiment of the present invention; [Diagram 2] FIG. 1 is a diagram showing an example of a hardware configuration of a communication device according to an embodiment of the present invention. [Diagram 3] FIG. 2 is a diagram showing an example of a frequency band configuration used for wireless communication in the present embodiment; [Figure 4] FIG. 1 is a diagram showing an example of a PHY frame structure of an EHT SU PPDU in this embodiment. [Diagram 5] FIG. 1 is a diagram showing an example of a PHY frame structure of an EHT MU PPDU in this embodiment. [Figure 6] FIG. 1 is a diagram showing an example of a PHY frame structure of an EHT ER PPDU in this embodiment. 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.

[0012] Fig. 1 shows an example of the configuration of a network according to this embodiment. The wireless network 101 in Fig. 1 is composed of an access point (hereinafter, AP) 102 and multiple stations (hereinafter, STAs) 103, 104, and 105. Here, the AP 102 is, for example, an access point that complies with the IEEE802.11 standard, and also includes a Group Owner (hereinafter, GO) that complies with the Wi-Fi Direct standard. When the AP 102 is a GO, the multiple STAs 103 to 105 are also called Clients.

[0013] AP102 establishes a wireless network 101 conforming to the IEEE802.11 standard and transmits a beacon including identification information of the wireless network. Here, the dotted line shown as the wireless network 101 in Fig. 1 indicates the range of the signal transmitted by AP102, and AP102 can communicate with STAs within the range of the dotted line. AP102 may also have a relay function.

[0014] When the AP 102 receives a Probe Request message transmitted from the STA, the AP 102 transmits a Probe Response message in response. The Probe Response message includes identification information of the wireless network 101. The identification information of the wireless network is, for example, a Service Set Identifier (hereinafter, SSID).

[0015] The AP 102 also communicates with the STAs 103 to 105 in accordance with a wireless communication method based on the IEEE802.11be standard. The AP 102 establishes a wireless connection with each of the STAs 103 to 105 via a predetermined association process or the like.

[0016] Note that FIG. 1 is just an example, and the following discussion can be applied to a network including many communication devices in a wider area, and to the positional relationships of various communication devices.

[0017] 2 shows the hardware configuration of the AP 102 and the STAs 103 to 105 as communication devices according to this embodiment. The AP 102 according to this embodiment may be not only a dedicated AP device such as a so-called wireless LAN router, but also a device such as a smartphone, camera, printer, projector, etc. The STAs 103 to 105 may also be devices such as a smartphone, camera, printer, projector, etc. One communication device may have both the function of an AP and the function of a STA.

[0018] The AP and the STA each include, as an example of a hardware configuration thereof, 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.

[0019] The storage unit 201 includes one or more ROMs and / or RAMs, and stores various information such as programs for performing various operations described below and communication parameters for wireless communication. Note that, in addition to memories such as ROM and RAM, the storage unit 201 may also be a storage medium such as 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, or a DVD.

[0020] The control unit 202 is configured with, for example, one or more processors such as a CPU or an MPU, an ASIC (Application Specific Integrated Circuit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), etc. Here, CPU is an acronym for Central Processing Unit, and MPU is an acronym for Micro Processing Unit. The control unit 202 controls the entire device by executing a program stored in the storage unit 201. Note that the control unit 202 may control the entire device in cooperation with the program stored in the storage unit 201 and an OS (Operating System).

[0021] Furthermore, the control unit 202 controls the functional unit 203 to execute predetermined processing such as imaging, printing, and projection. The functional unit 203 is hardware for the AP or STA to execute predetermined processing. For example, if the AP or STA is a camera, the functional unit 203 is an imaging unit and executes imaging processing. For example, if the AP or STA is a printer, the functional unit 203 is a printing unit and executes printing processing. For example, if the AP or STA is a projector, the functional unit 203 is a projection unit and executes projection processing. Data processed by the functional unit 203 may be data stored in the storage unit 201, or may be data communicated with another AP or STA via the communication unit 206 described later.

[0022] The input unit 204 receives various operations from the user. The output unit 205 outputs various types of information to the user. Here, the output by the output unit 205 includes at least one of display on a screen, audio output by a speaker, vibration output, and 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.

[0023] The communication unit 206 is a so-called wireless LAN chip that controls wireless communication conforming to the IEEE802.11 standard series and IP (Internet Protocol) communication. In this embodiment, the communication unit 206 can execute processing for communication conforming to at least the IEEE802.11be standard. The communication unit 206 is a processing device that generates a PPDU (Physical layer (PHY) Protocol Data Unit) conforming to the IEEE802.11 standard series. Or, it is a processing device that receives and processes a PPDU generated by another device. The communication unit 206 in this embodiment generates or processes various PPDUs to be described later. In addition, the communication unit 206 controls the antenna 207 to transmit and receive wireless signals for wireless communication. The AP or STA communicates content such as image data, document data, and video data with other communication devices via the communication unit 206. The wireless antenna 207 is an antenna that can receive any of the sub-GHz band, the 2.4 GHz band, the 5 GHz band, and the 6 GHz band. The wireless antenna 207 may be physically configured with two or more antennas in order to perform MIMO communication.

[0024] Fig. 3 shows the frequency band configuration used in wireless communication in this embodiment. In the 2.4 GHz band used for wireless LAN, the available frequency bandwidth is 20 MHz or 40 MHz. In the 5 GHz band also used for wireless LAN, the available frequency bandwidth is either 20 MHz, 40 MHz, 80 MHz, or 160 MHz.

[0025] In this embodiment, a frequency band from 5.925 GHz to 7.125 GHz, known as the 6 GHz band, can be used. In the 6 GHz band, not only 20 MHz, 40 MHz, 80 MHz, and 160 MHz can be used as available frequency bandwidths, but also a bandwidth of 320 MHz. Note that FIG. 3 is an example, and frequency bands other than these frequency bands may be used, and a bandwidth of 320 MHz may also be used in the 5 GHz band.

[0026] 4 to 6 are examples of frame formats of EHT SU PPDU, EHT MU PPDU, and EHT ER PPDU, which are wireless frames in the IEEE802.11be standard used in this embodiment. EHT is an abbreviation for Extremely High Throughput. These PPDUs include a preamble portion of the physical layer (PHY), a data field, and a packet extension portion. The preamble of the PPDU includes each field shown in 401 to 407 (or 501 to 508, 601 to 607). Various data of the MAC layer and above are stored in the data fields 408, 509, and 608. Note that FIGS. 4 to 6 are merely examples, and each PPDU may include fields other than those described below, or some fields may be omitted. Also, the order of the fields is not limited to the order shown in FIGS. 4 to 6.

[0027] First, the information contained in the PPDU is a Short Training Field (STF), a Long Term Field (LTF), and a Signal Field (SIG).

[0028] The head of the PPDU contains L-STF (Legacy-STF) 401, L-LTF (Legacy-LTF) 402, and L-SIG (Legacy-Signal) 403, which are backward compatible with the IEEE802.11a / b / g / n / ac / ax standards.

[0029] The L-STF401 is used for detecting PHY frame signals, automatic gain control (AGC), timing detection, etc. The L-LTF602 is used for high-precision frequency and time synchronization, and for acquiring channel state information (CSI), etc. The L-SIG403 is used to transmit control information including communication rate and length information.

[0030] Legacy devices that comply with the IEEE 802.11a / b / g / n / ac / ax standards are able to decode the data in the various legacy fields listed above.

[0031] The EHT SU PPDU in Fig. 4 is a PPDU used in communication between a single user (between an AP and a single STA). The EHT SU PPDU has L-STF401, L-LTF02, L-SIG403, RL-SIG404, EHT-SIG-A405, EHT-STF406, and EHT-LTF407 as preambles. It also has a data field 408 and a packet extension 609.

[0032] The EHT ER SU PPDU in Fig. 6 is a PPDU used in Extended Range (when it is desired to extend the communication distance) and is used for communication between an AP and a single STA. The EHT ER SU PPDU has L-STF 601, L-LTF 602, L-SIG 603, RL-SIG 604, EHT-SIG-A 605, EHT-STF 606, and EHT-LTF 607 as preambles. It also has a data field 608 and a packet extension 609. The EHT ER SU PPDU differs from the EHT SU PPDU in that restrictions are placed on the MCS (modulation scheme and coding rate) that can be used in order to extend the communication distance.

[0033] As shown in Tables 1 and 2, EHT-SIG-A405 and 605 included in the EHT SU PPDU and EHT ER SU PPDU contain information on EHT-SIG-A1 and EHT-SIG-A2 required for receiving PPDU.

[0034] In this embodiment, the frequency bandwidth and preamble puncturing information to be used are indicated in the Bandwidth field of EHT-SIG-A1. For example, when the value of the Bandwidth field is 0, it indicates that a bandwidth of 20 MHz is used, when it is 1, it indicates that a bandwidth of 40 MHz is used, when it is 2, it indicates that a bandwidth of 80 MHz is used, when it is 3, it indicates that a bandwidth of 160 MHz is used, and when it is 4, it indicates that a bandwidth of 320 MHz is used. And, when it is one of these values, it indicates that the preamble puncturing mode is not used. When the value of the Bandwidth field is 5, it indicates that only the secondary 20 MHz is punctured with 80 MHz preamble puncturing. Note that the frequency band to be punctured means that the frequency band is not used. When the value of the Bandwidth field is 6, it indicates that only one of the two 20 MHz of the secondary 40 MHz is punctured with 80 MHz preamble puncturing. When the value of the Bandwidth field is 7, it indicates that only the secondary 20 MHz is punctured with 160 (or 80+80) MHz preamble puncturing. A value of 8 in the Bandwidth field indicates that at least one 20 MHz other than the primary 40 MHz is punctured with 160 (or 80+80) MHz preamble puncturing. A value of 9 in the Bandwidth field indicates that only the secondary 20 MHz is punctured with 320 MHz preamble puncturing. A value of 10 in the Bandwidth field indicates that only one of the two 20 MHz secondary 40 MHz is punctured with 320 MHz preamble puncturing. A value of 11 in the Bandwidth field indicates that at least one 20 MHz other than the primary 80 MHz is punctured with 320 MHz preamble puncturing. At least 4 bits are allocated to the Bandwidth field of EHT-SIG-A1 to indicate this information.The correspondence between the Bandwidth field value and the allocation of the punctured frequency band described here is an example, and other allocations may be used as long as they are shown for a bandwidth of 320 MHz. Also, the field names and bit positions and sizes are not limited to those shown in Tables 1 and 2, and similar information may be stored with different field names, in different orders, or in different sizes.

[0035] [Table 1]

[0036] [Table 2]

[0037] [Table 3]

[0038] [Table 4]

[0039] The EHT MU PPDU in Fig. 5 is a PPDU used in multi-user (between an AP and multiple STAs) communications. The EHT MU PPDU has L-STF 501, L-LTF 502, L-SIG 503, RL-SIG 504, EHT-SIG-A 505, EHT-SIG-B 506, EHT-STF 507, and EHT-LTF 507 as preambles. It also has a data field 508 and a packet extension 509.

[0040] As shown in Tables 3 and 4, EHT-SIG-A505 contains the information of EHT-SIG-A1 and EHT-SIG-A2 required for receiving PPDU.

[0041] In this embodiment, the frequency bandwidth and preamble puncturing information to be used are indicated in the Bandwidth field of EHT-SIG-A1. For example, when the value of the Bandwidth field is 0, it indicates that a bandwidth of 20 MHz is used, when it is 1, it indicates that a bandwidth of 40 MHz is used, when it is 2, it indicates that a bandwidth of 80 MHz is used, when it is 3, it indicates that a bandwidth of 160 MHz is used, and when it is 4, it indicates that a bandwidth of 320 MHz is used. And, when it is one of these values, it indicates that the preamble puncturing mode is not used. When the value of the Bandwidth field is 5, it indicates that only the secondary 20 MHz is punctured with 80 MHz preamble puncturing. Note that the frequency band to be punctured means that the frequency band is not used. When the value of the Bandwidth field is 6, it indicates that only one of the two 20 MHz of the secondary 40 MHz is punctured with 80 MHz preamble puncturing. When the value of the Bandwidth field is 7, it indicates that only the secondary 20 MHz is punctured with 160 (or 80+80) MHz preamble puncturing. A value of 8 in the Bandwidth field indicates that at least one 20 MHz other than the primary 40 MHz is punctured with 160 (or 80+80) MHz preamble puncturing. A value of 9 in the Bandwidth field indicates that only the secondary 20 MHz is punctured with 320 MHz preamble puncturing. A value of 10 in the Bandwidth field indicates that only one of the two 20 MHz secondary 40 MHz is punctured with 320 MHz preamble puncturing. A value of 11 in the Bandwidth field indicates that at least one 20 MHz other than the primary 80 MHz is punctured with 320 MHz preamble puncturing. At least 4 bits are allocated to the Bandwidth field of EHT-SIG-A1 to indicate this information.The correspondence between the Bandwidth field value and the allocation of the punctured frequency band described here is an example, and other allocations may be used as long as they are shown for a bandwidth of 320 MHz. Also, the field names and bit positions and sizes are not limited to those shown in Tables 1 and 2, and similar information may be stored with different field names, in different orders, or in different sizes.

[0042] As described above, in the EHT SU PPDU, EHT ER SU PPDU, and EHT MU PPDU used in the IEEE802.11be standard, preamble puncturing can be performed by specifying a frequency band exceeding 160 MHz. In the above description, the EHT SU PPDU, EHT ER SU PPDU, and EHT MU PPDU each have the same information in the Bandwidth field. However, the correspondence between the value of the Bandwidth field and the allocation of the frequency band to be punctured may be different between the SU PPDU and the MU PPDU. When preamble puncturing is performed in the MU PPDU, i.e., in multi-user communication, it is possible to allocate a communication band to a different user (STA) for each frequency width of, for example, 20 MHz. For example, in the case of the MU PPDU, i.e., in the case of the multi-user communication, the number of frequency bands to be punctured may be increased compared to the case of the SU PPDU, i.e., in the case of the single-user communication, and the value of the Bandwidth field may be defined accordingly. This allows the degree of freedom in using frequency bands to be increased in the case of the multi-user communication compared to the case of the single-user communication.

[0043] [Table 5]

[0044] [Table 6]

[0045] [Table 7]

[0046] (Modification) In the above example, preamble processing information is shown in the Bandwidth field of EHT-SIG-A1. 4 bits are assigned to the Bandwidth field of EHT-SIG-A1 so that information can be displayed when the frequency bandwidth used is 320 MHz. In the following example, the Bandwidth field of EHT-SIG-A1 is set to 3 bits, and a separate field for EHT-SIG-A3 is added, and these fields are used to display preamble processing information.

[0047] First, when the value of the Bandwidth field of EHT-SIG-A1 is 0, it indicates that the frequency bandwidth to be used is 20 MHz. When the value of the Bandwidth field of EHT-SIG-A1 is 1, it indicates that the frequency bandwidth to be used is 40 MHz. When the value of the Bandwidth field of EHT-SIG-A1 is 2, it indicates that the frequency bandwidth to be used is 80 MHz. When the value of the Bandwidth field of EHT-SIG-A1 is 3, it indicates that the frequency bandwidth to be used is 160 MHz. When the value of the Bandwidth field of EHT-SIG-A1 is 4, it indicates that the frequency bandwidth to be used is 320 MHz. Also, when the value of the Bandwidth field of EHT-SIG-A1 is 0 to 4, it indicates that preamble proccuturing is not performed. And when the value of the Bandwidth field of EHT-SIG-A1 is 5, it indicates that the frequency bandwidth to be used is 80 MHz and preamble proccuturing is performed. When the value of the Bandwidth field of EHT-SIG-A1 is 6, it indicates that the frequency bandwidth to be used is 160 MHz and that preamble processing is performed. When the value of the Bandwidth field of EHT-SIG-A1 is 7, it indicates that the frequency bandwidth to be used is 320 MHz and that preamble processing is performed. Furthermore, when the value of the Bandwidth field of EHT-SIG-A1 is 5 to 7, EHT-SIG-A3 shown in Table 5 is included in the EHT-PPDU. Note that the field names, bit positions, sizes, etc. shown in Table 5 are examples, and different names, positions, sizes, etc. may be used as long as they indicate similar information.

[0048] The EHT-SIG-A3 shown in Table 5 includes a Preamble Puncturing field that indicates the frequency bandwidth for which preamble puncturing is performed. The Preamble Puncturing field in Table 5 has a bit length of 16 bits, and is associated with the 20 MHz bandwidth in order starting from bit position B0. When the 20 MHz band is used, the bit is set to 0, and when it is not used, i.e., when puncturing is performed, the bit is set to 1. Note that the definitions of bits 0 and 1 can be reversed. In other words, in Table 5, the frequency band to be used is indicated in the form of a bitmap.

[0049] For example, if the frequency bandwidth used is 80 MHz and only the secondary 20 MHz is punctured, the value of the Bandwidth field of EHT-SIG-A1 is set to 5. Then, in the Preamble Puncturing field of EHT-SIG-A3, only the B1 bit is set to 1, and the other bits are set to 0. The bitmap may be variable in length according to the frequency bandwidth defined in the Bandwidth field of EHT-SIG-A1. That is, when the frequency bandwidth used is 80 MHz, it may be 4 bits, when it is 160 MHz, it may be 8 bits, and when it is 320 MHz, it may be 16 bits. In that case, the excessive upper bits for the frequency bandwidth defined in the Bandwidth field of EHT-SIG-A1 may be reserved without being used.

[0050] [Table 8]

[0051] As yet another modified example, instead of the example of Table 5, the frequency band to be preamble punctured may be indicated as follows. That is, when the value of the Preamble Puncturing field of EHT-SIG-A3 is 0, the entire frequency bandwidth is used, that is, preamble puncturing is not performed. When the value of the Preamble Puncturing field of EHT-SIG-A3 is 1, it indicates that the lowest frequency bandwidth of 20 MHz is punctured. When the value of the Preamble Puncturing field of EHT-SIG-A3 is 2, it indicates that 20 MHz from 20 to 40 MHz from the lowest frequency bandwidth is punctured. When the value of the Preamble Puncturing field of EHT-SIG-A3 is 3, it indicates that 20 MHz from 40 to 60 MHz from the lowest frequency bandwidth is punctured. In this manner, the value of the Preamble Puncturing field of EHT-SIG-A3 may be defined. However, the example described here is merely an example, and other methods may be used.

[0052] As described above, according to the present embodiment and each modification, even if the frequency bandwidth used for wireless LAN communication becomes 320 MHz, it becomes possible to perform appropriate preamble puncturing. In addition, the AP or STA can generate an EHT-SIG-A field in a PPDU frame of the wireless LAN in order to perform appropriate preamble puncturing. Then, by communicating these PPDU frames between the AP and the STA, it is possible to perform appropriate preamble puncturing in the wireless LAN communication between the AP and the STA.

[0053] (Other embodiments) 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.

[0054] The invention is not limited to the above-described embodiments, and various modifications and variations are possible without departing from the spirit and scope of the invention. Accordingly, the following claims are appended to apprise the public of the scope of the invention. [Explanation of symbols]

[0055] 102 AP 103~105 STA 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 capable of wireless communication based on the IEEE 802.11 standard, A transmitting means for transmitting a radio frame having a physical layer (PHY) preamble and a data field, The preamble has an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an RL-SIG (Repeated Legacy Signal Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), In the preamble, the EHT-STF is located after the L-SIG, and a signal field having a first group of fields and a second group of fields located after the first group of fields is further included between the L-SIG and the EHT-STF, the first group of fields includes a field consisting of three consecutive bits indicating information on a frequency bandwidth used for communication and a field consisting of six consecutive bits indicating information on a BSS color, and the second group of fields includes a field consisting of a predetermined number of consecutive bits indicating information on Preamble Puncturing and a field consisting of four consecutive bits used for CRC, At least one bit of the predetermined number of consecutive bits in a field indicating information regarding the preamble puncturing is information indicating whether or not the one bit in the frequency bandwidth used for communication punctures a corresponding 20 MHz frequency width.

2. A communication device capable of wireless communication based on the IEEE 802.11 standard, A transmitting means for transmitting a radio frame having a physical layer (PHY) preamble and a data field, The preamble has an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an RL-SIG (Repeated Legacy Signal Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), In the preamble, the EHT-STF is located after the L-SIG, and a signal field having a first field group and a second field group is further included between the L-SIG and the EHT-STF, the first field group includes a field consisting of three consecutive bits indicating information on a frequency bandwidth used for communication and a field consisting of six consecutive bits indicating information on a BSS color, and the second field group includes a field consisting of a predetermined number of consecutive bits indicating information on Preamble Puncturing and a field consisting of four consecutive bits used for CRC, a field indicating information regarding preamble puncturing, the field indicating the information regarding preamble puncturing being set to a predetermined value when the predetermined number of consecutive bits is all set to a predetermined value ...

3. 3. The communication device according to claim 1, wherein the radio frame includes an EHT Multi User (MU) PPDU.

4. 3. The communication device according to claim 1, further comprising a plurality of antennas, and the transmitting means transmits the radio frames via the plurality of antennas.

5. 3. The communication device according to claim 1, wherein the second field group is made up of 26 bits.

6. 3. The communication device according to claim 2, wherein the predetermined value is zero.

7. The communication device described in claim 2, characterized in that the specified value is 1.

8. A communication device capable of wireless communication based on the IEEE 802.11 standard, a receiving means for receiving a radio frame having a physical layer (PHY) preamble and a data field; The preamble has an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an RL-SIG (Repeated Legacy Signal Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), In the preamble, the EHT-STF is located after the L-SIG, and a signal field having a first group of fields and a second group of fields located after the first group of fields is further included between the L-SIG and the EHT-STF, the first group of fields includes a field consisting of three consecutive bits indicating information on a frequency bandwidth used for communication and a field consisting of six consecutive bits indicating information on a BSS color, and the second group of fields includes a field consisting of a predetermined number of consecutive bits indicating information on Preamble Puncturing and a field consisting of four consecutive bits used for CRC, At least one bit of the predetermined number of consecutive bits in a field indicating information regarding the preamble puncturing is information indicating whether or not the one bit in the frequency bandwidth used for communication punctures a corresponding 20 MHz frequency width.

9. A communication device capable of wireless communication based on the IEEE 802.11 standard, a receiving means for receiving a radio frame having a physical layer (PHY) preamble and a data field; The preamble has an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an RL-SIG (Repeated Legacy Signal Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), In the preamble, the EHT-STF is located after the L-SIG, and a signal field having a first field group and a second field group is further included between the L-SIG and the EHT-STF, the first field group includes a field consisting of three consecutive bits indicating information on a frequency bandwidth used for communication and a field consisting of six consecutive bits indicating information on a BSS color, and the second field group includes a field consisting of a predetermined number of consecutive bits indicating information on Preamble Puncturing and a field consisting of four consecutive bits used for CRC, a field indicating information regarding preamble puncturing, the field indicating the information regarding preamble puncturing being set to a predetermined value when the predetermined number of consecutive bits is all set to a predetermined value ...

10. 10. The communication device according to claim 8, wherein the radio frame includes an EHT Multi User (MU) PPDU.

11. 10. The communication device according to claim 8, further comprising a plurality of antennas, and the receiving means receives the radio frames via the plurality of antennas.

12. 10. The communication device according to claim 8, wherein the second field group is composed of 26 bits.

13. The communication device according to claim 9 , wherein the predetermined value is zero.

14. The communication device of claim 9, wherein the predetermined value is 1.

15. A communication method for performing wireless communication based on the IEEE 802.11 standard, comprising: A transmitting step of transmitting a radio frame having a physical layer (PHY) preamble and a data field, The preamble has an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an RL-SIG (Repeated Legacy Signal Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), In the preamble, the EHT-STF is located after the L-SIG, and a signal field having a first field group and a second field group is further included between the L-SIG and the EHT-STF, the first field group includes a field consisting of three consecutive bits indicating information on a frequency bandwidth used for communication and a field consisting of six consecutive bits indicating information on a BSS color, and the second field group includes a field consisting of a predetermined number of consecutive bits indicating information on Preamble Puncturing and a field consisting of four consecutive bits used for CRC, a field indicating information regarding preamble puncturing, the field indicating the information regarding preamble puncturing being set to a predetermined value when the predetermined number of consecutive bits is all set to a predetermined value ...

16. A communication method for performing wireless communication based on the IEEE 802.11 standard, comprising: A receiving step of receiving a radio frame having a physical layer (PHY) preamble and a data field, The preamble has an L-STF (Legacy Short Training Field), an L-LTF (Legacy Long Training Field), an L-SIG (Legacy Signal Field), an RL-SIG (Repeated Legacy Signal Field), an EHT-STF (EHT Short Training Field), and an EHT-LTF (EHT Long Training Field), In the preamble, the EHT-STF is located after the L-SIG, and a signal field having a first field group and a second field group is further included between the L-SIG and the EHT-STF, the first field group includes a field consisting of three consecutive bits indicating information on a frequency bandwidth used for communication and a field consisting of six consecutive bits indicating information on a BSS color, and the second field group includes a field consisting of a predetermined number of consecutive bits indicating information on Preamble Puncturing and a field consisting of four consecutive bits used for CRC, a field indicating information regarding preamble puncturing, the field indicating the information regarding preamble puncturing being set to a predetermined value when the predetermined number of consecutive bits is all set to a predetermined value ...

17. A program for causing a computer to operate as the communication device according to any one of claims 1 to 14.

Images