Communication device, communication method, and program

Abstract

To provide a device and a method for notifying a user of communication in a frequency bandwidth larger than 160 MHz in a wireless LAN.SOLUTION: In a wireless communication system, a preamble transmitted by a communication device includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), a Legacy Signal Field (L-SIG), an EHT (Extremely High Throughput) Signal Field (EHT-SIG-A), an EHT Short Training Field (EHT-STF), and an EHT Long Training Field (EHT-LTF). The EHT-SIG-A includes one or more subfields indicating that the communication device communicates in a frequency band exceeding 160 MHz.SELECTED DRAWING: Figure 7

Description

Technical Field

[0001] The present invention relates to communication control technology in a wireless LAN.

Background Art

[0002] In recent years, with the development of information and communication technologies, the amount of Internet usage has been increasing year by year, and various communication technologies have been developed to meet the increasing demand. Among them, wireless local area network (wireless LAN) technology has realized an improvement in throughput in Internet communications such as packet data, voice, and video by wireless LAN terminals, and various technology developments are still being actively carried out.

[0003] In the development of wireless LAN technology, a number of standardization efforts by IEEE (Institute of Electrical and Electronics Engineers) 802, which is a standardization body for wireless LAN technology, have played an important role. As one of the wireless LAN communication standards, the IEEE802.11 standard is known, and there are standards such as IEEE802.11n / a / b / g / ac or IEEE802.11ax. For example, in IEEE802.11ax, in addition to a high peak throughput of up to 9.6 gigabits per second (Gbps) by OFDMA (Orthogonal frequency-division multiple access), an improvement in communication speed under congested conditions has been realized (Patent Document 1).

[0004] In recent years, in order to further improve throughput, a Study Group called IEEE802.11 EHT (Extremely High Throughput) has been established as a successor standard to IEEE802.11ax. As one of the measures for improving throughput that IEEE802.11 EHT aims for, increasing the maximum value of the frequency bandwidth to 320 MHz is being considered. Note that the frequency widths conventionally used in wireless LANs are four types: 20 MHz, 40 MHz, 80 MHz, and 160 MHz.

Prior Art Documents

Patent Document

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] As described above, in IEEE802.11 EHT, the use of a 320 - MHz frequency bandwidth is being considered. However, in the standards for wireless LANs up to now, no mechanism has been defined to notify communication using a frequency bandwidth exceeding 160 MHz.

[0007] The present invention has been made in view of the above problems, and an object thereof is to enable notification in a preamble of communication using a frequency bandwidth exceeding 160 MHz.

Means for Solving the Problems

[0008] A communication device according to an aspect of the present invention has the following features. That is, It has a preamble and a data field TB PPDU (Trigger Based Physical layer Protocol Data Unit) A communication device having transmission means for transmitting, The preamble 、S IG ( Signal Fiel d) includes, the Record S I G is , a field composed of 3 bits or more indicating the bandwidth used for communication, which is the bandwidth used for communication where 32 0MHz is is to shown the first that can including the field, and is characterized by this.

Effects of the Invention

[0009] According to the present invention, it becomes possible to notify communication using a frequency bandwidth exceeding 160 MHz in the preamble.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. Note that the following embodiments do not limit the invention according to the claims. Although a plurality of features are described in the embodiments, not all of these plurality of features are essential to the invention, and the plurality of features may be arbitrarily combined. Further, in the accompanying drawings, the same or similar configurations are given the same reference numerals, and duplicate descriptions are omitted.

[0012] (Network Configuration) Figure 1 shows a configuration example of a wireless communication network in this embodiment. This wireless communication network includes one access point (AP102) and three STAs (STA103, STA104, STA105) as devices compliant with the IEEE802.11 EHT (Extremely High Throughput) standard (EHT devices). Note that EHT may be understood as an abbreviation of Extreme High Throughput. Since AP102 has the same functions as STA103 to 105 except for having a relay function, it can be said to be a form of STA. STAs inside the circle 101 indicating the range where the signal transmitted by AP102 reaches can communicate with AP102. AP102 communicates with each of STA103 to 105 according to the wireless communication method of the IEEE802.11 EHT standard. AP102 can establish a wireless link with each of STA103 to 105 through connection processes such as an association process compliant with the IEEE80211 series of standards.

[0013] Note that the configuration of the wireless communication network shown in Figure 1 is merely an example for explanation. For example, a network including a larger number of EHT devices and legacy devices (communication devices compliant with the IEEE802.11a / b / g / n / ax standards) in a wider area may be configured. Also, the discussion below is applicable not only to the arrangement of each communication device shown in Figure 1, but also to various positional relationships of communication devices.

[0014] (Configuration of AP) Figure 2 is a block diagram showing the functional configuration of AP102. As an example of its functional configuration, AP102 has a wireless LAN control unit 201, a frame generation unit 202, a signal analysis unit 203, and a UI (user interface) control unit 204.

[0015] The wireless LAN control unit 201 may be configured to include one or more antennas 205 and circuits for transmitting and receiving wireless signals (wireless frames) to and from other wireless LAN devices, as well as a program for controlling them. The wireless LAN control unit 201 executes communication control of the wireless LAN based on the frame generated by the frame generation unit 202 in accordance with the IEEE802.11 series of standards.

[0016] The frame generation unit 202 generates a frame to be transmitted by the wireless LAN control unit 201 based on the result of the analysis performed by the signal analysis unit 203 on the signal received by the wireless LAN control unit 201. The frame generation unit 202 may create a frame without relying on the analysis result by the signal analysis unit 203. The signal analysis unit 203 performs an analysis on the signal received by the wireless LAN control unit 201. The UI control unit 204 receives an operation on the input unit 304 (Fig. 3) by a user (not shown) of the AP102, and performs control for transmitting a control signal corresponding to the operation to each component, and output control (including display, etc.) for the output unit 305 (Fig. 3).

[0017] Fig. 3 shows the hardware configuration of the AP102 in this embodiment. As an example of its hardware configuration, the AP102 has a storage unit 301, a control unit 302, a functional unit 303, an input unit 304, an output unit 305, a communication unit 306, and one or more antennas 205.

[0018] The storage unit 301 is composed of both a ROM and a RAM, or either one of them, and stores programs for performing various operations described later, as well as various information such as communication parameters for wireless communication. Note that, as the storage unit 301, 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.

[0019] The control unit 302 is composed of, for example, a processor 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 the acronym for Central Processing Unit, and MPU is the acronym for Micro Processing Unit. The control unit 302 controls the entire AP102 by executing the program stored in the storage unit 301. Note that the control unit 302 may control the entire AP102 in cooperation with the program stored in the storage unit 301 and the OS (Operating System).

[0020] Also, the control unit 302 controls the functional unit 303 to execute predetermined processes such as imaging, printing, and projection. The functional unit 303 is the hardware for the AP102 to execute predetermined processes. For example, when the AP102 is a camera, the functional unit 303 is an imaging unit that performs imaging processing. Also, for example, when the AP102 is a printer, the functional unit 303 is a printing unit that performs printing processing. Also, for example, when the AP102 is a projector, the functional unit 303 is a projection unit that performs projection processing. The data processed by the functional unit 303 may be the data stored in the storage unit 301, or may be the data communicated with the STA or another AP via the communication unit 306 described later.

[0021] The input unit 304 receives various operations from the user. The output unit 305 performs various outputs to the user. Here, the output by the output unit 305 includes at least one of display on the screen, audio output by the speaker, vibration output, etc. Note that both the input unit 304 and the output unit 305 may be realized by one module such as a touch panel.

[0022] The communication unit 206 controls wireless communication compliant with the IEEE 802.11 EHT standard, wireless communication compliant with Wi-Fi, and IP (Internet Protocol) communication. Also, the communication unit 306 controls one or more antennas 205 to transmit and receive wireless signals for wireless communication. In that case, MIMO (Multi Input Multi Output) communication using spatial streams becomes possible. The AP 102 communicates contents such as image data, document data, and video data with other communication devices via the communication unit 306.

[0023] (Configuration of STA) The functional configuration and hardware configuration of STAs 103 to 105 shall be the same as the functional configuration (Figure 2) and hardware configuration (Figure 3) of the above-described AP 102, respectively. That is, each of STAs 103 to 105 may be configured to have, as a functional configuration, a wireless LAN control unit 201, a frame generation unit 202, a signal analysis unit 203, and a UI control unit 204, and, as a hardware configuration, a storage unit 301, a control unit 302, a functional unit 303, an input unit 304, an output unit 305, a communication unit 306, and one or more antennas 205.

[0024] (Flow of processing) Subsequently, with reference to FIGS. 4 and 5, the flow of processing executed by the AP 102 configured as described above and the sequence of processing executed by the wireless communication system shown in FIG. 1 will be described. FIG. 4 shows a flowchart indicating the processing executed by the AP 102. The flowchart shown in FIG. 4 can be realized by the control unit 302 of the AP 102 executing a control program stored in the storage unit 301 and performing arithmetic operations and processing of information and control of each hardware. Also, FIG. 5 shows a sequence chart of the processing executed in the wireless communication system.

[0025] Before the description of FIGS. 4 and 5, the configuration of the frequency band used for wireless communication in this embodiment will be described with reference to FIG. 6. FIG. 6 shows an example of the frequency band configuration used for wireless communication. In the 2.4 GHz band that has been conventionally used for wireless LAN, the available frequency band width is 20 MHz or 40 MHz. Also, in the 5 GHz band that has also been conventionally used for wireless LAN, the available frequency band width is any one of 20 MHz, 40 MHz, 80 MHz, and 160 MHz. On the other hand, in the frequency band of 5.925 GHz to 7.125 GHz, which is called the 6 GHz band and is a frequency that has been newly considered for opening to wireless LAN in recent years, 80 MHz, 160 MHz, and 320 MHz are candidates for the available frequency band width. Note that the frequency band in the 6 GHz band is not limited to the IEEE802.11 EHT standard and can also be used in IEEE802.11x.

[0026] In FIGS. 4 and 5, the AP 102 performs connection processing according to the standards of the IEEE802.11 series for each of the STAs 103 to 105 (S401, F501). That is, a wireless link is established by transmitting and receiving frames such as Probe Request / Response, Association Request / Reponse, and Auth between the AP 102 and each of the STAs 103 to 105. Subsequently, the AP 102 determines the frequency band width to be used for wireless communication (S402, F502). The frequency band width can be determined as a bandwidth preset in the wireless communication system. Also, the frequency band width may be determined by an operation on an input unit 304 (not shown) of the AP 102 by a user.

[0027] Next, the AP 102 determines communication parameters including the frequency band width determined in S402 and F502 to be included in the wireless frame to be transmitted (S403, F503). Subsequently, the AP 102 transmits the data to the STAs 103 to 105 in the form of a wireless frame including the determined transmission data communication parameters and the data (404, F504).

[0028] (Frame Structure) Next, examples of the PHY (Physical) frame structures of PPDUs defined by the IEEE802.11EHT standard transmitted at S404 and F504 are shown in FIGS. 7 to 10. Note that PPDU is an abbreviation for Physical Layer (PHY) Protocol Data Unit. FIG. 7 shows an example of the PHY frame structure of an EHT SU PPDU, which is a PPDU for single-user (SU) communication (between an AP and a single STA). FIG. 8 shows an example of the PHY frame structure of an EHT ER PPDU, which is a PPDU for communication in an extended range (communication distance). The EHT ER PPDU is used for communication between an AP and a single STA. FIG. 9 shows an example of the PHY frame structure of an EHT MU PPDU, which is a PPDU for multi-user (MU) communication (between an AP and multiple STAs). FIG. 10 shows an example of the PHY frame structure of an EHT TB (Trigger Based) PPDU having a structure without EHT-SIG-B for the EHT MU PPDU. When using EHT TB, since the allocation of communication resources for multiple STAs is performed using a trigger frame, EHT-SIG-B is not included. The EHT TB PPDU is used for communication between an AP and multiple STAs.

[0029] As information included in the PPDU common to FIGS. 7 to 10, there are STF (Short Training Field), LTF (Long Term Field), and SIG (Signal Field). Taking FIG. 7 as an example, the PPDU header has L (Legacy)-STF701, L-LTF702, and L-SIG703 that are backward compatible with the IEEE802.11a / b / g / n / ax standards. L-STF701 is used for detection of PHY frame signals, automatic gain control (AGC), timing detection, etc. L-LTF702 arranged immediately after L-STF701 is used for high-precision frequency and time synchronization, acquisition of propagation channel information (CSI), etc. L-SIG703 arranged immediately after L-LTF702 is used to transmit control information including data transmission rate and PHY frame length information. Legacy devices compliant with the IEEE802.11a / b / g / n / ax standards can decode the data of the above various legacy fields (L-STF701, L-LTF702, L-SIG703). The above various legacy fields are similarly included in the PPDUs shown in FIGS. 8 to 10.

[0030] The EHT SU PPDU shown in FIG. 7 has, following the above-mentioned L-STF701, L-LTF702, and L-SIG703, RL-SIG704, EHT-SIG-A705, EHT-STF706, EHT-LTF707, data field 708, and Packet extention709. RL-SIG704 may be absent. EHT-SIG-A705 is arranged after L-SIG703, EHT-STF706 is arranged immediately after EHT-SIG-A705, and EHT-LTF707 is arranged immediately after EHT-STF706. Note that the fields up to L-STF701, L-LTF702, L-SIG703, RL-SIG704, EHT-SIG-A705, EHT-STF706, and EHT-LTF707 are called the preamble. EHT-SIG-A705 contains information such as EHT-SIG-A1 and EHT-SIG-A2 necessary for receiving the PPDU. Table 1 and Table 2 respectively show the sub-fields constituting EHT-SIG-A1 and EHT-SIG-A2 included in EHT-SIG-A705 and their descriptions.

[0031]

Table 1

[0032]

Table 2

[0033] The frequency bandwidth determined by S402 and F502 is indicated by the Bandwidth subfield (B19 - B20) in EHT - SIG - A1 (Table 1). As shown in Table 1, when the value of the Bandwidth subfield is 0, the frequency bandwidth is 20 MHz, when it is 1, it is 40 MHz, when it is 2, it is 80 MHz, and when it is 3, it is 160 MHz (80 + 80 MHz). In this embodiment, as described with reference to FIG. 6, a frequency bandwidth exceeding 160 MHz is assumed to use 320 MHz. On the other hand, only 2 bits are prepared in the Bandwidth subfield, and only four types of frequency bandwidths can be specified. Therefore, in this embodiment, 1 bit of the Reserved subfield (B14) in EHT - SIG - A1 (Table 1) and / or the Reserved subfield (B14) in EHT - SIG - A2 (Table 2) is used. Thus, in combination with the Bandwidth subfield in EHT - SIG - A1, a total of 3 bits or 4 bits are used to specify the frequency bandwidth.

[0034] Following EHT - SIG - A705, EHT - STF706 is the abbreviation of EHT Short Training Field, and its main purpose is to improve the automatic gain control in MIMO transmission. EHT - LTF707 is the abbreviation of EHT Long Training Field, which provides a means for the receiver to estimate the MIMO channel. The data field 708 may contain data of MIMO communication transmitted at the number of SS (spatial streams) indicated by the NSTS And Midamble Periodicity subfield of EHT - SIG - A1.

[0035] The EHT ER PPDU shown in FIG. 8 is a PPDU used when it is desired to extend the communication distance, and is used for communication between an AP and a single STA. The EHT ER PPDU has L-STF801, L-LTF802, L-SIG803, RL-SIG804, EHT-SIG-A805, EHT-STF806, EHT-LTF807, data field 808, and Packet extention809. RL-SIG804 may be omitted. L-LTF802 is arranged immediately after L-STF801, L-SIG803 is arranged immediately after L-LTF802, EHT-SIG-A805 is arranged after L-SIG803, EHT-STF806 is arranged immediately after EHT-SIG-A805, and EHT-LTF807 is arranged immediately after EHT-STF806. Note that the fields up to L-STF801, L-LTF802, L-SIG803, RL-SIG804, EHT-SIG-A805, EHT-STF806, and EHT-LTF807 are called the preamble. The information contained in each field is the same as that of the EHT SU PPDU shown in FIG. 7, so the description is omitted. Note that in EHT-SIG-A805, similar to the ETH SU PPDU in FIG. 7, the B14 bits of EHT-SIG-A1 and the B14 bits of EHT-SIG-A2 are the Reserved subfields, and this subfield can also be used to set the frequency bandwidth used in wireless communication.

[0036] The EHT MU PPDU in Fig. 9 is the PPDU used for MU communication as described above. The EHT MU PPDU has L-STF901, L-LTF902, L-SIG903, RL-SIG904, EHT-SIG-A905, EHT-SIG-B906, EHT-STF907, EHT-LTF908, data field 909, and Packet extention910. RL-SIG904 may be absent. L-LTF902 is arranged immediately after L-STF901, L-SIG903 is arranged immediately after L-LTF902, EHT-SIG-A905 is arranged after L-SIG903, EHT-SIG-B906 is arranged immediately after EHT-SIG-A905, EHT-STF907 is arranged immediately after EHT-SIG-B906, and EHT-LTF908 is arranged immediately after EHT-STF907. Note that the fields up to L-STF901, L-LTF902, L-SIG903, RL-SIG904, EHT-SIG-A905, EHT-SIG-B906, EHT-STF907, and EHT-LTF908 are called the preamble.

[0037] EHT-SIG-A905 contains information such as EHT-SIG-A1 and EHT-SIG-A2 that are necessary for receiving the PPDU. Table 3 and Table 4 show the sub-fields that make up EHT-SIG-A1 and EHT-SIG-A2 included in EHT-SIG-A705 and their descriptions, respectively.

[0038]

Table 3

[0039]

Table 4

[0040] EHT-SIG-B906 contains information such as the Common field and User Block field necessary for receiving PPDU. Table 5 and Table 6 respectively show the sub-fields that make up the Common field and User Block field included in EHT-SIG-B906 and their descriptions.

[0041]

Table 5

[0042]

Table 6

[0043] The User field has different formats depending on whether it is transmitted by OFDMA or MU-MIMO for multiple users. Table 7 shows the description of the User field when transmitted by OFDMA, and Table 8 shows the description of the User field when transmitted by MU-MIMO.

[0044]

Table 7

[0045]

Table 8

[0046] In the EHT MU PPDU, in addition to the 3-bit Reserved sub-field (B15 - B17) in EHT-SIG-A1 (Table 3), the Reserved sub-field (B7) in EHT-SIG-A2 (Table 4) can also be used to set the frequency bandwidth used in wireless communication.

[0047] As described above, the EHT TB PPDU in FIG. 10 is a PPDU with no EHT-SIG-B structure for the EHT MU PPDU. When using the EHT TB PPDU, the allocation of communication resources for multiple STAs is performed using a trigger frame. The EHT TB PPDU has L-STF1001, L-LTF1002, L-SIG1003, RL-SIG1004, EHT-SIG-A1005, EHT-STF1006, EHT-LTF1007, data field 1008, and Packet extention1009. RL-SIG1004 may be absent. L-LTF1002 is arranged immediately after L-STF1001, L-SIG903 is arranged immediately after L-LTF1002, EHT-SIG-A1005 is arranged after L-SIG1003, EHT-STF1006 is arranged immediately after EHT-SIG-A1005, and EHT-LTF1007 is arranged immediately after EHT-STF1006. Note that the fields up to L-STF1001, L-LTF1002, L-SIG1003, RL-SIG1004, EHT-SIG-A1005, EHT-STF1006, and EHT-LTF1007 are called the preamble.

[0048] Although the detailed description of the sub-fields constituting EHT-SIG-A1 and EHT-SIG-A2 of EHT-SIG-A1005 in the EHT TB PPDU is omitted, the B23 bits of EHT-SIG-A1 and the B7 - B15 bits of EHT-SIG-A2 are Reserved sub-fields. Therefore, these sub-fields can also be used to set the frequency bandwidth used in wireless communication.

[0049] As described above, for any PPDU used in the IEEE802.11 EHT standard, an area of 3 bits or more is secured in EHT-SIG-A to specify the frequency bandwidth, and a frequency band exceeding 160 MHz can be specified.

[0050] Note that FIGS. 7 to 10 show a frame structure that is backward compatible with the IEEE802.11a / b / g / n / ax standards. However, when it is not necessary to ensure backward compatibility, the fields of L-STF and L-LTG may be omitted. Instead, EHT-STF and EHT-LTF may be inserted.

[0051] The present invention can also be realized by supplying a program that realizes one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and causing one or more processors in a computer of the system or device to read and execute the program. Further, it can also be realized by a circuit (for example, ASIC) that realizes one or more functions.

[0052] The invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the spirit and scope of the invention. Therefore, the claims are attached to disclose the scope of the invention.

Explanation of Reference Numerals

[0053] 102 to 104 AP (Access Point), 105 to 107 STA (Wireless LAN Terminal), 201 Wireless LAN Control Unit, 202 Frame Generation Unit, 203 Signal Analysis Unit, 204 UI Control Unit, 205 Antenna

Claims

1. A communication device having transmission means for transmitting a TB PPDU (Trigger Based Physical layer Protocol Data Unit) having a preamble and a data field, The preamble includes a SIG (Signal Field), The SIG is a field composed of 3 bits or more indicating the bandwidth used for communication, and includes a first field capable of indicating that the bandwidth used for communication is 320 MHz, A communication device characterized by the above.

2. The access point allocates communication resources to a plurality of stations using a trigger frame, and the transmission means transmits the TB PPDU to the access point. The communication device according to claim 1.

3. The transmission means transmits the TB PPDU including the first field indicating that the bandwidth is 320 MHz in the 6 GHz band. The communication device according to claim 1 or 2.

4. The communication device further has determination means for determining the frequency bandwidth used for communication based on an operation received from a user, In the SIG of a predetermined physical (PHY) frame in which the communication device communicates with an external device, information corresponding to the frequency bandwidth used for communication determined by the determination means is specified. The communication device according to any one of claims 1 to 3.

5. The communication device is a camera having an imaging function or a printer having a printing function. The communication device according to any one of claims 1 to 4.

6. The SIG further includes a second field indicating a BSS color for identifying a Basic Service Set (BSS), a third field indicating information regarding a Transmission Opportunity (TXOP), and a fourth field indicating information regarding spatial reuse The communication device according to any one of claims 1 to 5, characterized in that...

7. The communication device according to claim 6, characterized in that the second field is composed of 6 bits and the third field is composed of 7 bits.

8. The communication device according to claim 6 or 7, characterized in that the third field is located after the first field, and a value smaller than 127 is set in the third field to set the NAV.

9. The communication device according to any one of claims 1 to 8, characterized in that the SIG further includes a fifth field indicating CRC and a sixth field indicating the end to a trellis convolutional decoder by setting 0.

10. A communication device having receiving means for receiving a TB PPDU (Trigger Based Physical layer Protocol Data Unit) having a preamble and a data field, wherein the preamble includes a SIG (Signal Field), wherein the SIG is a field composed of 3 bits or more indicating the bandwidth used for communication, and includes a first field capable of indicating that the bandwidth used for communication is 320 MHz The communication device is characterized in that...

11. The communication device according to claim 10, characterized in that the communication device allocates communication resources to a plurality of stations using a trigger frame, and the receiving means receives the TB PPDU transmitted from the station.

12. The communication device according to claim 10 or 11, characterized in that the receiving means receives the TB PPDU including the first field indicating that the bandwidth is 320 MHz in the 6 GHz band.

13. The communication device further has determining means for determining the frequency bandwidth used for communication based on an operation received from a user. In the SIG of the predetermined physical (PHY) frame in which the communication device communicates with an external device, information corresponding to the frequency bandwidth used for the communication determined by the determining means is specified. The communication device according to any one of claims 10 to 12.

14. The communication device is a camera having an imaging function or a printer having a printing function. The communication device according to any one of claims 10 to 13.

15. The SIG further includes a second field indicating a BSS color for identifying a Basic Service Set (BSS), a third field indicating information regarding a Transmission Opportunity (TXOP), and a fourth field indicating information regarding spatial reuse. The communication device according to any one of claims 10 to 14, characterized in that.

16. The second field is composed of 6 bits, and the third field is composed of 7 bits. The communication device according to claim 15.

17. The third field is located after the first field, and a value smaller than 127 is set in the third field for setting a NAV. The communication device according to claim 15 or 16.

18. The SIG further includes a fifth field indicating a CRC and a sixth field indicating an end to a trellis convolutional decoder by setting 0. The communication device according to any one of claims 10 to 17, characterized in that.

19. The preamble further includes a Legacy Short Training Field (L-STF), a Legacy Long Training Field (L-LTF), and a Legacy Signal Field (L-SIG) before the SIG. The preamble further includes a STF different from the L-STF and an LTF different from the L-LTF and used for channel estimation, after the SIG. The communication device according to any one of claims 1 or 2, characterized in that.

20. A communication method executed by a communication device, The communication method includes a transmission step of transmitting a TB PPDU (Trigger Based Physical layer Protocol Data Unit) having a preamble and a data field, The preamble includes a SIG (Signal Field), The SIG is a field composed of 3 bits or more indicating the bandwidth used for communication, and includes a first field capable of indicating that the bandwidth used for communication is 320 MHz. The communication method is characterized by that.

21. The access point allocates communication resources to a plurality of stations using a trigger frame, and in the transmission step, the TB PPDU is transmitted to the access point. The communication method according to claim 20, characterized in that.

22. In the transmission step, in the 6 GHz band, the TB PPDU including the first field indicating that the bandwidth is 320 MHz is transmitted. The communication method according to claim 20 or 21, characterized in that.

23. A program for causing a computer included in a communication device to transmit a TB PPDU (Trigger Based Physical layer Protocol Data Unit) having a preamble and a data field, The preamble includes a SIG (Signal Field), The SIG is a field composed of 3 bits or more indicating the bandwidth used for communication, and includes a first field capable of indicating that the bandwidth used for communication is 320 MHz. A program characterized by the above.

24. The access point allocates communication resources to a plurality of stations using a trigger frame, and the program causes the computer to transmit the TB PPDU to the access point. The program according to claim 23.

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