KR20240047290A - Apparatus and method for supporting communication using a plurality of bandwidths in wireless local area network system - Google Patents

Abstract

A wireless communication method of a first device according to an aspect of the technical idea of the present disclosure includes receiving a PPDU (physical layer protocol data unit) from a second device, from a signal field included in the PPDU to a channel bandwidth of the PPDU. It includes extracting at least one of a first field and a second field and identifying a channel bandwidth of the PPDU based on at least one of the value of the first field and the value of the second field.

Description

Apparatus and method for supporting communication using multiple bandwidths in a WLAN system {APPARATUS AND METHOD FOR SUPPORTING COMMUNICATION USING A PLURALITY OF BANDWIDTHS IN WIRELESS LOCAL AREA NETWORK SYSTEM}

The technical idea of the present disclosure relates to wireless communication, and specifically to an apparatus and method for supporting communication using multiple bandwidths in a WLAN system.

As an example of wireless communication, WLAN (wireless local area network) is a technology that connects two or more devices using a wireless signal transmission method. WLAN technology may be based on the IEEE (institute of electrical and electronics engineers) 802.11 standard. The 802.11 standard has evolved into 802.11b, 802.11a, 802.11g, 802.11n, 802.11ac, and 802.11ax, with transmission rates up to 1 Gbyte/s based on orthogonal frequency-division multiplexing (OFDM) technology. Support is available.

In 802.11ac, data can be transmitted simultaneously to multiple users through the multi-user multi-input multi-output (MU-MIMO) technique. In 802.11ax, referred to as HE (high efficiency), not only MU-MIMO but also orthogonal frequency-division multiple access (OFDMA) technology is applied to provide multiple access by dividing available subcarriers to users. It is being implemented. Through this, a WLAN system with 802.11ax can effectively support communication in dense areas and outdoors.

802.11be, referred to as EHT (extremely high throughput), seeks to support 6GHz unlicensed frequency band, support various bandwidths per channel, introduce HARQ (Hybrid Automatic Repeat and reQuest), and support up to 16X16 MIMO. Through this, the next-generation WLAN system is expected to effectively support low latency and high-speed transmission like NR (New Radio), a 5G technology.

Meanwhile, in the next generation of EHT, ultra high reliability (UHR), a new technology was proposed to support a bandwidth of up to 640 MHz per channel in 802.11be to increase spectral efficiency and transmission rate.

The problem to be solved by the technical idea of the present disclosure is to provide an apparatus and method for accurately and effectively indicating a bandwidth determined to be used for communication among a plurality of bandwidths in a WLAN system.

In order to achieve the above object, a wireless communication method of a first device according to an exemplary embodiment of the present disclosure includes receiving a PPDU (physical layer protocol data unit) from a second device, a signal included in the PPDU and identifying the channel bandwidth of the PPDU based on values of a first field and a second field related to the channel bandwidth of the PPDU extracted from the field.

A wireless communication method of a first device according to an exemplary embodiment of the present disclosure includes receiving a physical layer protocol data unit (PPDU) from a second device, receiving information about a channel bandwidth of the PPDU from a signal field included in the PPDU. Extracting a field and identifying whether the channel bandwidth of the PPDU is one of 20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz, and 640 MHz based on the value of the field.

A wireless communication method of a first device according to an exemplary embodiment of the present disclosure includes determining a channel bandwidth for transmitting a physical layer protocol data unit (PPDU) to a second device, a first field indicating the determined channel bandwidth; and generating a second field, generating a PPDU including the first field and the second field and meeting the determined channel bandwidth, and transmitting the PPDU to the second device.

A wireless communication method of a first device according to an exemplary embodiment of the present disclosure includes determining a channel bandwidth for transmitting a physical layer protocol data unit (PPDU) to a second device, an extended field indicating the determined channel bandwidth; Generating a PPDU including the extended field and matching the determined channel bandwidth, and transmitting the PPDU to the second device, wherein the determined channel bandwidth is 20 MHz and 40 MHz. It is characterized in that it is any one of MHz, 80 MHz, 160 MHz, 320 MHz and 640 MHz.

In a wireless local area network (WLAN) system according to an exemplary embodiment of the present disclosure, a first device configured to communicate with a second device includes a transceiver configured to receive a physical protocol data unit (PPDU) from the second device. and extracting at least one of a first field and a second field related to a channel bandwidth of the PPDU from the signal field included in the PPDU, and extracting the data based on at least one of the value of the first field and the value of the second field. A signal processor configured to identify the channel bandwidth of the PPDU.

In a wireless local area network (WLAN) system according to an exemplary embodiment of the present disclosure, a second device configured to communicate with a first device includes a transceiver configured to transmit a physical protocol data unit (PPDU) to the first device. and determining a channel bandwidth for transmitting the PPDU, generating a first field and a second field indicating the determined channel bandwidth, and generating a PPDU including the first field and the second field and conforming to the determined channel bandwidth. and a signal processor configured to generate.

The access point of the wireless communication system according to an exemplary embodiment of the present disclosure can effectively inform the station of the channel bandwidth determined for communication among a plurality of channel bandwidths including 640 MHz based on the signal field of the PPDU. Additionally, a station in a wireless communication system can accurately identify the channel bandwidth determined from the signal field of the PPDU and efficiently decode the PPDU based on the identification result. Through this, the wireless communication system can effectively perform communication using various channel bandwidths.

The effects that can be obtained from the exemplary embodiments of the present disclosure are not limited to the effects mentioned above, and other effects not mentioned are common knowledge in the technical field to which the exemplary embodiments of the present disclosure belong from the following description. It can be clearly derived and understood by those who have it. That is, unintended effects resulting from implementing the exemplary embodiments of the present disclosure may also be derived by those skilled in the art from the exemplary embodiments of the present disclosure.

1 is a diagram illustrating a wireless communication system 10 according to an exemplary embodiment of the present disclosure.
Figure 2 is a block diagram showing a device 100 according to an exemplary embodiment of the present disclosure.
Figure 3 is a flowchart for explaining a method of operating a wireless communication system according to an exemplary embodiment of the present disclosure.
Figure 4 is a diagram showing a PPDU according to an exemplary embodiment of the present disclosure.
Figure 5 is a diagram showing a U-SIG field according to an exemplary embodiment of the present disclosure.
6A and 6B are diagrams for explaining examples of channel bandwidth arrangement according to an exemplary embodiment of the present disclosure.
7A to 7C are diagrams for explaining a method of identifying a channel bandwidth using U-SIG-1 according to an exemplary embodiment of the present disclosure.
Figure 8 is a diagram showing a U-SIG field according to an exemplary embodiment of the present disclosure.
FIG. 9 is a diagram illustrating a method for identifying a channel bandwidth using U-SIG-1 according to an exemplary embodiment of the present disclosure.
10A to 10C are diagrams showing examples of the U-SIG field according to example embodiments of the present disclosure.
Figure 11 is a flowchart for explaining a method of operating a first device according to an exemplary embodiment of the present disclosure.
Figure 12 is a diagram showing examples of devices for wireless communication according to an exemplary embodiment of the present disclosure.

1 is a diagram illustrating a wireless communication system 10 according to an exemplary embodiment of the present disclosure. Specifically, Figure 1 shows a wireless local area network (WLAN) system as an example of the wireless communication system 10.

In describing the embodiments of the present disclosure in detail, the main target will be the OFDM or OFDMA-based wireless communication system, especially the IEEE 802.11 standard, but the main gist of the present disclosure is other communications with similar technical background and channel type. Systems (e.g., cellular communication systems such as long term evolution (LTE), LTE-advanced (LTE-A), new radio (NR), wireless broadband (WiBro), and global system for mobile communication (GSM) or short-distance communication systems such as Bluetooth and NFC (near field communication)) can be applied with slight modifications without significantly departing from the scope of the present disclosure, which requires skilled technical knowledge in the technical field of the present disclosure. It will be possible at the discretion of those who have it.

In addition, various functions described below may be implemented or supported by artificial intelligence technology or one or more computer programs, each of which is composed of computer-readable program code and implemented on a computer-readable medium. do. The terms "application" and "program" refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, associated data, or portions thereof suitable for implementation in suitable computer-readable program code. The term “computer-readable program code” includes all types of computer code, including source code, object code, and executable code. The term "computer-readable media" refers to a computer-readable medium, such as read only memory (ROM), random access memory (RAM), hard disk drive, compact disk (CD), digital video disk (DVD), or any other type of memory. Includes all types of media that can be accessed by. “Non-transitory” computer-readable media excludes wired, wireless, optical, or other communication links that transmit transient electrical or other signals. Non-transitory computer-readable media includes media on which data can be permanently stored, and media on which data can be stored and later overwritten, such as rewritable optical disks or erasable memory devices.

In various embodiments of the present disclosure described below, a hardware approach method is explained as an example. However, since various embodiments of the present disclosure include technology using both hardware and software, the various embodiments of the present disclosure do not exclude software-based approaches.

In addition, terms referring to control information, terms referring to entries, terms referring to network entities, terms referring to messages, terms referring to device components, etc. used in the description to be described later. This is an example for convenience of explanation. Accordingly, the present disclosure is not limited to the terms described below, and other terms having equivalent technical meaning may be used.

Referring to FIG. 1, the wireless communication system 10 includes first and second access points (AP1, AP2), a first station (STA1), a second station (STA2), a third station (STA3), and a fourth station. (STA4) may be included. The first and second access points (AP1, AP2) may be connected to a network 13 including the Internet, an Internet Protocol (IP) network, or any other network. The first access point (AP1) provides access to the network 13 within the first coverage area 11 to the first station (STA1), the second station (STA2), the third station (STA3), and the fourth station ( STA4), and the second access point (AP2) can also provide access to the network 13 within the second coverage area 12 to the third and fourth stations STA3 and STA4. In some embodiments, the first and second access points (AP1, AP2) connect the first station (STA1), the second station (STA2), and the third station based on wireless fidelity (WiFi) or any other WLAN access technology. It is possible to communicate with at least one of the station STA3 and the fourth station STA4.

An access point may be referred to as a router, a gateway, etc., and a station may be a mobile station, a subscriber station, a terminal, a mobile terminal, a wireless terminal, a user equipment, or a user. It may be referred to as, etc. The station may be a mobile device, such as a mobile phone, laptop computer, wearable device, etc., or a stationary device, such as a desktop computer, smart TV, etc. In this specification, a station (STA) may be referred to as a first device, and an access point (AP) may be referred to as a second device.

The access point may determine the channel bandwidth used to communicate with the station as one of a plurality of channel bandwidths. In this specification, channel bandwidth may also be referred to as bandwidth. In an example embodiment, the plurality of channel bandwidths may include 20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz, and 640 MHz. The access point may set the value of at least one field of the PPDU to inform the station of the determined channel bandwidth. In this specification, the operation of setting the value of a field may be defined as the operation of creating a field.

In an exemplary embodiment, the access point may indicate the determined channel bandwidth using the first and second fields of the signal field included in the PPDU. In this specification, indicating a determined channel bandwidth may include indicating a deployment type of the determined channel bandwidth. Details regarding the arrangement type of channel bandwidth are described later in FIGS. 6A and 6B. Additionally, in this specification, the second field is used to identify the channel bandwidth of the PPDU above the reference bandwidth. Specifically, the second field is defined as a field set to indicate that a channel bandwidth of 640 MHz has been determined to be used for communication. It can be.

In an exemplary embodiment, the station extracts at least one of the first field and the second field from the signal field included in the PPDU, and determines the channel bandwidth of the PPDU based on at least one of the value of the first field and the value of the second field. can be identified.

In an exemplary embodiment, the access point may indicate the channel bandwidth determined using the extended first field of the signal field included in the PPDU. In this specification, the extended first field may be defined as at least one bit added to the existing first field to indicate that a channel bandwidth of 640 MHz has been determined.

In an exemplary embodiment, the station may extract the extended first field from the signal field included in the PPDU and identify the channel bandwidth of the PPDU based on the value of the extended first field.

The access point of the wireless communication system 10 according to an exemplary embodiment of the present disclosure provides a channel determined for communication among a plurality of channel bandwidths including 640 MHz to the station based on the signal field of the PPDU generated in the above manner. Bandwidth can be effectively announced to the station. Additionally, the station of the wireless communication system 10 can accurately identify the channel bandwidth determined from the signal field of the PPDU and efficiently decode the PPDU based on the identification result. Through this, the wireless communication system 10 can effectively perform communication using various channel bandwidths.

Meanwhile, the wireless communication system 10 can further support a wider and more diverse channel bandwidth than 640 MHz, and it will be fully understood that the technical idea of the present disclosure can be applied to indicate a channel bandwidth determined for communication among these channel bandwidths. will be.

Figure 2 is a block diagram showing a device 100 according to an exemplary embodiment of the present disclosure. The device 100 of FIG. 2 is a second device (e.g., an access point (AP)) that is a transmitting device including a transceiver capable of data communication, or a first device (e.g., a station) that is a receiving device. It may be STA)). That is, the device 100 of FIG. 2 may be any one of the access points (AP1, AP2) and stations (STA1, STA2, STA3, and STA4) shown in FIG. 1, for example, a computer, a smart It can be applied to smart phones, portable electronic devices, tablets, wearable devices, and sensors used in IoT (Internet of Things). Hereinafter, the case where the device 100 is a second device that is a transmitting device will be described as an example.

The second device 100 may include a main processor 130, a memory 120, a transceiver 140, and antenna arrays 101 to 104. The main processor 130, memory 120, transceiver 140, and antenna arrays 101 to 104 may be directly or indirectly connected to each other.

Specifically, the main processor 130 can control the memory 120 and the transceiver 140. The PPDU format 121 and bandwidth field information 122 may be stored in the memory 120. The transceiver 140 may generate a PPDU using the PPDU format 121 and bandwidth field information 122 stored in the memory 120. The transceiver 140 may transmit the generated PPDU to a first device, which is an external receiving device, through the antenna arrays 101 to 104.

Here, the memory 120 may store a PPDU format 121 including a signal field-related format and bandwidth field information 122 regarding values indicating channel bandwidths according to an exemplary embodiment of the present disclosure. Additionally, the memory 120 may store processor-executable instructions for executing the PPDU generation module 123. Processor-executable instructions stored in the memory 120 may be executed by the main processor 130 or a signal processor 150 included in the transceiver 14.

In an exemplary embodiment, the signal processor 150 may generate a PPDU indicating a channel bandwidth determined for communication among a plurality of channel bandwidths based on the PPDU format 121 and bandwidth field information 122. Specific embodiments of this are described later in FIG. 7A, etc.

Meanwhile, the signal processor 150 includes various modules (i.e., various modules of the transmit path) configured to generate each section of a PPDU or various types of communication transmission units. You can have it. 2 shows an embodiment in which the signal processor 150 is included in the transceiver 140, but this is only an exemplary embodiment and is not limited to this, and the signal processor 150 is separate from the transceiver 140. It can be implemented with a configuration of.

Specifically, the signal processor 150 includes a TX FIFO (151; transmit First-In-First-Out), an encoder (152), a scrambler (153), an interleaver (154), and a constellation mapper ( 155; with constellation mapper, for example, QAM symbol can be generated), IDFT (157; Inversed Discrete Fourier Transformer), guard interval and windowing insertion module (156; with guard interval and windowing insertion module, for example) , a guard interval can be added on the frequency to reduce spectrum interference, and the signal can be modified through windowing).

For reference, the transceiver 140 may include components well known to those skilled in the art, as shown in the drawing. And the corresponding parts can be implemented in a manner well known to those skilled in the art, and can be implemented using hardware, firmware, software logic, or a combination thereof.

Of course, if device 100 is a first device that is a receiving device, transceiver 140 shown in FIG. 2 may also include the components in a receiving path.

That is, when the device 100 is the first device, the transceiver 140 can receive the PPDU and identify the channel bandwidth determined for communication from the PPDU. Specifically, the signal processor 150 may extract at least one field of the preamble included in the PPDU, decode it, and identify the determined channel bandwidth. The signal processor 150 may determine whether the identified channel bandwidth matches the preset channel bandwidth and perform decoding on the PPDU based on the determination result.

The subject of the 'decoding task' may be a component other than the signal processor 150 (e.g., the main processor 130), but in an exemplary embodiment of the present disclosure, the PPDU received by the signal processor 150 This will be explained using decoding as an example.

Meanwhile, FIG. 2 only shows an example of the device 100 and the embodiment of the present disclosure is not limited thereto. That is, various changes can be made in FIG. 2.

Figure 3 is a flowchart for explaining a method of operating a wireless communication system according to an exemplary embodiment of the present disclosure. A wireless communication system may include an access point 200 and a station 210.

Referring to FIG. 3, in step S100, the access point 200 may determine a channel bandwidth for communication with the station 210 from a plurality of channel bandwidths. In an example embodiment, the plurality of channel bandwidths may include 20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz, and 640 MHz. Although not shown in FIG. 3, the access point 200 may inform the station 210 of the determined channel bandwidth in advance, and the station 210 may store the corresponding channel bandwidth in memory as a preset channel bandwidth. .

In step S110, the access point 200 may generate a U-SIG field based on the channel bandwidth determined in step S100. In an exemplary embodiment, the U-SIG field may include a first field and a second field to indicate one of a plurality of channel bandwidths. In some embodiments, the U-SIG field may include an extended first field to indicate one of a plurality of channel bandwidths.

In step S120, the access point 200 may transmit a PPDU including the U-SIG field generated in step S110 to the station 210.

In step S130, the station 210 may extract at least one field from the received PPDU.

In step S140, the station 210 may identify the channel bandwidth based on the value of at least one extracted field.

In step S150, the station 210 may decode the PPDU based on the identified channel bandwidth. Specifically, the station 210 may decode the PPDU or skip decoding based on whether the identified channel bandwidth matches the preset channel bandwidth.

Figure 4 is a diagram showing a PPDU according to an exemplary embodiment of the present disclosure. Specifically, Figure 4 shows the structure of an EHT PPDU. Meanwhile, in the following, embodiments are described focusing on standards related to EHT, but the technical idea of the present disclosure can be applied to next-generation standards related to UHR, and in this case, the EHT PPDU may be referred to as UHR PPDU.

Referring to FIG. 4, the EHT PPDU may include a preamble including training fields and signal fields and a payload including a data field. In the preamble, the EHT PPDU includes L-STF (legacy-short training field), L-LTF (legacy-long training field), L-SIG (legacy-signal) field, RL-SIG (repeated legacy-signal) field, U -May include a universal signal (SIG) field, an extremely high throughput-signal (EHT-SIG) field, an extremely high throughput-short training field (EHT-STF), and an extremely high throughput-long training field (EHT-LTF). . Additionally, the EHT PPDU may include a data field and a PE (packet extension) field in the payload. In this specification, the U-SIG field and the EHT-SIG field may be simply referred to as U-SIG and EHT-SIG, respectively. Additionally, as described above, in the next-generation standard related to UHR, the EHT-SIG field may be referred to as the UHR-SIG field.

The L-STF can include short training OFDM symbols and can be used for frame detection, automatic gain control (AGC), diversity detection, and coarse frequency/time synchronization. You can. L-LTF may include long training OFDM symbols and may be used for fine frequency/time synchronization and channel estimation. The L-SIG field may be used to transmit control information and may include information on data rate and data length. In some embodiments, the L-SIG field may be repeated in the RL-SIG field.

The U-SIG field (or U-SIG) may include control information common to at least one station receiving the EHT PPDU. For example, as shown in FIG. 4, the U-SIG field may include version-independent fields and version-dependent fields. In some embodiments, the U-SIG field may further include fields corresponding to a cyclic redundancy check (CRC) and a tail, respectively, and reserved bits. Version-independent fields may have static positions and bit definitions in different generations and/or physical versions. In some embodiments, the U-SIG field, unlike the EHT-SIG field described below, may be modulated based on a single modulation scheme, such as binary phase-shift keying (BPSK). An example of the U-SIG field will be described later with reference to FIG. 5.

The EHT-SIG field may have a variable modulation and coding scheme (MCS) and length. For example, when an EHT PPDU is transmitted to multiple users, the EHT-SIG field includes a common field containing common control information and a user-specific field containing user-dependent control information, as shown in Figure 4. can do. As shown in Figure 4, the U-SIG field may have a fixed length (eg, 52 bits long), while the EHT-SIG field may have a variable length. Common fields may include U-SIG overflow, total number of non-OFDMA users, and resource unit allocation subfield (RUA). User-specific fields for non-MU MIMO may include an STA-ID subfield, MCS subfield, N _STS subfield, Beamformed subfield, and coding subfield, and user-specific fields for MU-MIMO may include It may include an STA-ID subfield, MCS subfield, coding subfield, and spatial configuration subfield. In some embodiments, the EHT-SIG field may be modulated based on one of two or more modulation schemes, such as BPSK, quadrature binary phase shift keying (QBPSK), etc.

Figure 5 is a diagram showing a U-SIG field according to an exemplary embodiment of the present disclosure. As described above with reference to FIG. 4, the U-SIG field may be included in the EHT PPDU, and the EHT-SIG field may follow the U-SIG field.

Referring to FIG. 5, the U-SIG field may include U-SIG-1 and U-SIG-2. As shown in Figure 5, U-SIG-1 may be composed of '26' bits from B0 to B25, and U-SIG-2 may be composed of '26' bits from B0 to B25. In other words, U-SIG-1 may have a length of '26' bits, and U-SIG-2 may have a length of '26' bits. U-SIG-1 may include a first field (BW) and a second field (BW_EX) to indicate the channel bandwidth determined for communication, and the first field (BW) includes three bits B3 to B5. And the second field (BW_EX) may be composed of 'α' bits from B20 to Bx.

In Figure 5, an embodiment is shown in which the second field (BW_EX) is placed in the Disregard field corresponding to the reserved field, but this is only an exemplary embodiment and is not limited to this, and other reserved fields of U-SIG-1 (for example, For example, the second field (BW_EX) can be placed using the Validate (Val.) field. In addition, in FIG. 5, an embodiment is shown in which the second field (BW_EX) is located in B20 to Bx, but this is only an exemplary embodiment and is not limited to this, and may be located in various positions of at least one reserved field. .

U-SIG-1 is a version-independent field that includes a physical version identifier field (3 bits), a first field, a bandwidth field (3 bits), a UL/DL field (1 bit), and a BSS color field (6 bits). It may include a TXOP field (7 bits) and a second field, a bandwidth addition field (α bit). Detailed information regarding the first field and the second field will be described later with reference to FIGS. 7A to 7C. In addition, U-SIG-2 includes version-dependent fields such as PPDU type and compression mode field (2 bits), punctured channel information field (5 bits), EHT-SIG MCS field (2 bits), and It may include an EHT-SIG symbol number field (5 bits).

In FIG. 5, the first field (BW) and the second field (BW_EX) may be spaced apart by a predetermined number of bits and placed on the U-SIG field. That is, the U-SIG field may include at least one field disposed between the first field (BW) and the second field (BW_EX). In some embodiments, the first field (BW) and the second field (BW_EX) may be arranged consecutively.

As an example embodiment, the first field (BW) may indicate that the channel bandwidth is 640 MHz, and the second field (BW_EX) may indicate the deployment type of the channel bandwidth of 640 MHz.

Additionally, as an exemplary embodiment, the combination of the first field (BW) and the second field (BW_EX) may indicate that the channel bandwidth is 640 MHz and its deployment type.

In some embodiments, the first field (BW) may indicate that the channel bandwidth is 320 MHz, and the second field (BW_Ex) may indicate the deployment type of the channel bandwidth of 320 MHz.

Additionally, in some embodiments, the combination of the first field (BW) and the second field (BW_EX) may indicate that the channel bandwidth is 320 MHz and its deployment type.

6A and 6B are diagrams for explaining examples of channel bandwidth arrangement according to an exemplary embodiment of the present disclosure.

Referring to FIG. 6A, a plurality of channels in the 6GHz unlicensed band may include unlicensed national information infrastructure (UNII)5, UNII6, UNII6/7, UNII7, UNII7/8, and UNII8, each having a frequency domain/range. Multiple channels can be set up within the 6GHz unlicensed frequency band, and the bandwidth (or channel bandwidth) of each channel is determined as one of 20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz, and 640 MHz for communication. You can. In FIGS. 6A and 6B, for convenience of description, examples of channel bandwidths of 80 MHz, 160 MHz, 320 MHz, and 640 MHz are shown, and the description focuses on examples of the configuration types of channel bandwidths of 320 MHz and 640 MHz. .

320 MHz-1 refers to a channel bandwidth of 320 MHz with the first deployment type, where the channel bandwidth of 320 MHz-1 is deployed in part of UNII5, or across the remainder of UNII5, UNII6 and UNII6/7, or UNII7 and UNII7/8.

320 MHz-2 refers to a channel bandwidth of 320 MHz with a second deployment type, where the channel bandwidth of 320 MHz-2 is deployed in different parts of UNII5, or over parts of UNII6, UNII6/7 and UNII7, or It can be deployed across the remainder of UNII7, UNII7/8 and UNII8.

640 MHz-1 refers to a channel bandwidth of 640 MHz with the third deployment type, and the channel bandwidth of 640 MHz-1 can be deployed across UNII5, UNII6 and UNII6/7.

640 MHz-2 refers to a channel bandwidth of 640 MHz with the fourth deployment type, and the channel bandwidth of 640 MHz-2 can be deployed across parts of UNII5, UNII6, UNII6/7, UNII7 and UNII7/8.640 MHz-3 refers to a channel bandwidth of 640 MHz with the fifth deployment type, and the channel bandwidth of 640 MHz-3 can be deployed over different parts of UNII5, UNII6, UNII6/7 and parts of UNII7.

640 MHz-4 refers to a channel bandwidth of 640 MHz with the sixth deployment type, and the channel bandwidth of 640 MHz-4 can be deployed across UNII6, UNII6/7, UNII7, UNII7/8 and UNII8.

In an exemplary embodiment, the access point may form a channel bandwidth of 640 MHz using 320 MHz adjacent to each other on the frequency axis. As an example, 640 MHz-1 can be formed using 320 MHz-1 deployed over part of UNII5 and 320 MHz-1 deployed across the remainder of UNII5, UNII6, and UNII6/7. As an example, 640 MHz-2 can be formed using the remainder of UNII5, 320 MHz-1 deployed across UNII6 and UNII6/7, and 320 MHz-1 deployed across UNII7 and UNII7/8. As an example, 640 MHz-3 could be formed using 320 MHz-2 deployed across other parts of UNII5 and 320 MHz-2 deployed across parts of UNII6, UNII6/7, and UNII7. As an example, 640 MHz-4 could be formed using 320 MHz-2 spread over UNII6, UNII6/7 and part of UNII7, and 320 MHz-2 spread over the remainder of UNII7, UNII7/8 and UNII8.

In FIG. 6B, a configuration example different from the configuration example of a channel bandwidth of 640 MHz in FIG. 6A may be applied.

Referring further to FIG. 6B, 640 MHz-1 refers to a channel bandwidth of 640 MHz with the third deployment type, and the channel bandwidth of 640 MHz-1 can be deployed across UNII5, UNII6, and UNII6/7.

640 MHz-2 refers to a channel bandwidth of 640 MHz with the fourth deployment type, and the channel bandwidth of 640 MHz-2 can be deployed over part of UNII5, UNII6, UNII6/7 and part of UNII7.

640 MHz-3 refers to a channel bandwidth of 640 MHz with the fifth deployment type, and the channel bandwidth of 640 MHz-3 can be deployed across other parts of UNII5, UNII6, UNII6/7, UNII7 and UNII7/8.

640 MHz-4 refers to a channel bandwidth of 640 MHz with the sixth deployment type, and the channel bandwidth of 640 MHz-4 can be deployed across UNII6, UNII6/7, UNII7, UNII7/8 and UNII8.

In an exemplary embodiment, the access point may form a channel bandwidth of 640 MHz using 320 MHz adjacent to each other on the frequency axis. As an example, 640 MHz-1 can be formed using 320 MHz-1 deployed over part of UNII5 and 320 MHz-1 deployed across the remainder of UNII5, UNII6, and UNII6/7. As an example, 640 MHz-2 could be formed using 320 MHz-2 deployed across other parts of UNII5 and 320 MHz-2 deployed across parts of UNII6, UNII6/7, and UNII7. As an example, 640 MHz-3 can be formed using the remainder of UNII5, 320 MHz-1 deployed across UNII6 and UNII6/7, and 320 MHz-1 deployed across UNII7 and UNII7/8. As an example, 640 MHz-4 could be formed using 320 MHz-2 spread over UNII6, UNII6/7 and part of UNII7, and 320 MHz-2 spread over the remainder of UNII7, UNII7/8 and UNII8. However, the arrangement example of the channel bandwidth of 640 MHz in FIGS. 6A and 6B is only an exemplary embodiment, and is not limited to this, and the technical idea of the present disclosure can be applied to various arrangement examples.

7A to 7C are diagrams for explaining a method of identifying a channel bandwidth using U-SIG-1 according to an exemplary embodiment of the present disclosure.

Referring to FIG. 7A, the value of the first field (BW) consisting of three bits B3 to B5 in U-SIG-1 is any of '0, 1, 2, 3, 4, 5, and 6'. can be set. Specifically, in the first field (BW), '0' indicates a channel bandwidth of 20 MHz, '1' indicates a channel bandwidth of 40 MHz, '2' indicates a channel bandwidth of 80 MHz, and '3' indicates a channel bandwidth of 80 MHz. Indicates a channel bandwidth of 160 MHz, '4' indicates a channel bandwidth of 320 MHz-1, '5' indicates a channel bandwidth of 320 MHz-2, and '6' may indicate a channel bandwidth of 640 MHz.

The value of the second field (BW_EX) consisting of two bits B20 and B21 can be set to any of '0, 1, 2, or 3'. Specifically, when the value of the first field (BW) is '6', '0' in the second field (BW_EX) indicates a channel bandwidth of 640 MHz-1, and '1' indicates a channel bandwidth of 640 MHz-2. , '2' may indicate a channel bandwidth of 640 MHz-3, and '3' may indicate a channel bandwidth of 640 MHz-4.

Meanwhile, when the value of the first field (BW) is not set to '6', the second field (BW_EX) may be in a 'reserved' state. In an exemplary embodiment, the station may determine whether to extract the second field (BW_EX) based on the value of the first field (BW) and selectively extract the second field (BW_EX) based on the determination result. there is. Specifically, when the value of the first field (BW) is '0', '1', '2', '3', '4', or '5', the station uses a second field to identify the channel frequency. Extraction of (BW_EX) may be omitted, and when the value of the first field (BW) is '6', the second field (BW_EX) for identifying the channel frequency may be extracted.

For example, when the channel bandwidth used for communication at the access point is determined to be 640 MHz-1, the station extracts the first field (BW) from U-SIG-1 and the value of the first field (BW) is '6'. ', extract the second field (BW_EX) from U-SIG-1, and confirm that the value of the second field (BW_EX) is '0', thereby identifying it as 640 MHz-1.

Referring further to FIG. 7b, the value of the first field (BW) consisting of three bits B3 to B5 in U-SIG-1 is any of '0, 1, 2, 3, 4, 5, and 6'. It can be set to one. Specifically, in the first field (BW), '0' indicates a channel bandwidth of 20 MHz, '1' indicates a channel bandwidth of 40 MHz, '2' indicates a channel bandwidth of 80 MHz, and '3' indicates a channel bandwidth of 80 MHz. indicates a channel bandwidth of 160 MHz, '4' indicates a channel bandwidth of 320 MHz-1, '5' indicates a channel bandwidth of 320 MHz-2, and '6' indicates a channel bandwidth of 640 MHz-1 or 640 MHz-2. Indicates the channel bandwidth, and '7' may indicate a channel bandwidth of 640 MHz-3 or 640 MHz-4.

The value of the second field (BW_EX) consisting of one bit of B20 can be set to either '0 or 1'. Specifically, when the value of the first field (BW) is '6', '0' in the second field (BW_EX) indicates a channel bandwidth of 640 MHz-1, and '1' indicates a channel bandwidth of 640 MHz-2. can point to Additionally, when the value of the first field (BW) is '7', '0' in the second field (BW_EX) indicates a channel bandwidth of 640 MHz-3, and '1' indicates a channel bandwidth of 640 MHz-4. can point

Meanwhile, when the value of the first field (BW) is set to '0', '1', '2', '3', '4', or '5', the second field (BW_EX) is in the 'reserved' state. It can be. In an exemplary embodiment, the station uses a system to identify the channel frequency when the value of the first field (BW) is 0', '1', '2', '3', '4', or '5'. Extraction of the 2 field (BW_EX) can be omitted.

For example, when the channel bandwidth used for communication at the access point is determined to be 640 MHz-1, the station extracts the first field (BW) from U-SIG-1 and the value of the first field (BW) is '6'. ', extract the second field (BW_EX) from U-SIG-1, and confirm that the value of the second field (BW_EX) is '0', thereby identifying it as 640 MHz-1.

As another example, when the channel bandwidth used for communication at the access point is determined to be 640 MHz-3, the station extracts the first field (BW) from U-SIG-1 and the value of the first field (BW) is '7'. ', extract the second field (BW_EX) from U-SIG-1, and confirm that the value of the second field (BW_EX) is '0', thereby identifying it as 640 MHz-3.

Referring further to FIG. 7C, the value of the first field (BW) consisting of three bits B3 to B5 in U-SIG-1 is set to any one of '0, 1, 2, 3, 4, and 5'. It can be. Specifically, in the first field (BW), '0' indicates a channel bandwidth of 20 MHz, '1' indicates a channel bandwidth of 40 MHz, '2' indicates a channel bandwidth of 80 MHz, and '3' indicates a channel bandwidth of 80 MHz. Indicates a channel bandwidth of 160 MHz, '4' may indicate a channel bandwidth of 320 MHz-1 or 320 MHz-2, and '5' may indicate a channel bandwidth of 640 MHz.

The value of the second field (BW_EX) consisting of two bits B20 and B21 can be set to any of '0, 1, 2, or 3'. Specifically, when the value of the first field (BW) is '4', '0' in the second field (BW_EX) indicates a channel bandwidth of 320 MHz-1, and '1' indicates a channel bandwidth of 320 MHz-2. can point to In addition, when the value of the first field (BW) is '5', '0' in the second field (BW_EX) indicates a channel bandwidth of 640 MHz-1, and '1' indicates a channel bandwidth of 640 MHz-2. '2' may indicate a channel bandwidth of 640 MHz-3, and '3' may indicate a channel bandwidth of 640 MHz-4.

Meanwhile, when the value of the first field (BW) is not set to '4' or '5', the second field (BW_EX) may be in a 'reserved' state. In an exemplary embodiment, the station extracts the second field (BW_EX) to identify the channel frequency when the value of the first field (BW) is '0', '1', '2', or '3'. can be omitted.

For example, when the channel bandwidth used for communication at the access point is determined to be 320 MHz-1, the station extracts the first field (BW) from U-SIG-1 and the value of the first field (BW) is '4'. ', extract the second field (BW_EX) from U-SIG-1, and confirm that the value of the second field (BW_EX) is '0', thereby identifying it as 320 MHz-1.

As another example, when the channel bandwidth used for communication at the access point is determined to be 640 MHz-1, the station extracts the first field (BW) from U-SIG-1 and the value of the first field (BW) is '5'. ', extract the second field (BW_EX) from U-SIG-1, and confirm that the value of the second field (BW_EX) is '0', thereby identifying it as 640 MHz-1.

Figure 8 is a diagram showing a U-SIG field according to an exemplary embodiment of the present disclosure. Hereinafter, overlapping content with FIG. 5 will be omitted.

Referring to FIG. 8, the U-SIG field may include U-SIG-1 and U-SIG-2. As shown in FIG. 8, U-SIG-1 may be composed of '26' bits from B0 to B25, and U-SIG-2 may be composed of '26' bits from B0 to B25. In other words, U-SIG-1 may have a length of '26' bits, and U-SIG-2 may have a length of '26' bits. U-SIG-1 may include an extended first field (BW') to indicate the channel bandwidth determined for communication, and the extended first field (BW') consists of 4 bits B3 to B6. It can be configured. Details regarding the expanded first field (BW') are described later in FIG. 9.

In FIG. 8, an extended embodiment is shown in which the extended first field (BW') utilizes one bit of the Disregard field, which is a reserved field. However, this is only an exemplary embodiment and is not limited to this, and U-SIG- It can be extended by utilizing other reserved fields of 1 (e.g., Validate (Val.) field).

FIG. 9 is a diagram illustrating a method of identifying a channel bandwidth using U-SIG-1 according to an exemplary embodiment of the present disclosure.

Referring to FIG. 9, in U-SIG-1, the value of the extended first field (BW') consisting of 4 bits B3 to B6 is '0, 1, 2, 3, 4, 5, 6, 7. , 8, or 9' can be set. Specifically, in the extended first field (BW'), '0' indicates a channel bandwidth of 20 MHz, '1' indicates a channel bandwidth of 40 MHz, '2' indicates a channel bandwidth of 80 MHz, and ' '3' indicates a channel bandwidth of 160 MHz, '4' indicates a channel bandwidth of 320 MHz-1, '5' indicates a channel bandwidth of 320 MHz-2, and '6' indicates a channel bandwidth of 640 MHz-1. , '7' may indicate a channel bandwidth of 640 MHz-2, '8' may indicate a channel bandwidth of 640 MHz-3, and '9' may indicate a channel bandwidth of 640 MHz-4.

10A to 10C are diagrams showing examples of the U-SIG field according to example embodiments of the present disclosure.

Referring to FIG. 10A, in some embodiments, U-SIG-1 included in the U-SIG field may include a first field (BW) and a second field (BW_EX). As an example, the first field (BW) may indicate that the channel bandwidth determined for communication is 640 MHz, and the second field (BW_EX) may indicate the deployment type of the channel bandwidth of 640 MHz. As another example, a combination of the values of the first field (BW) and the second field (BW_EX) may indicate a channel bandwidth of 640 MHz and its deployment type.

In an exemplary embodiment, the first field (BW) and the second field (BW_EX) may be arranged to be spaced apart from each other in U-SIG-1. In some embodiments, the first field (BW) and the second field (BW_EX) may be arranged consecutively in U-SIG-1.

In an exemplary embodiment, the first field (BW) may have a longer bit length than the second field (BW_EX). In some embodiments, the first field (BW) may have the same bit length as the second field (BW_EX) or may have a shorter bit length.

Referring further to FIG. 10B, in some embodiments, U-SIG-1 included in the U-SIG field includes a first field (BW), and U-SIG-2 included in the U-SIG field includes a second field (BW). May include a field (BW_EX). As an example, the first field (BW) of U-SIG-1 indicates that the channel bandwidth determined for communication is 640 MHz, and the second field (BW_EX) of U-SIG-2 indicates the deployment type of the channel bandwidth of 640 MHz. can point As another example, a combination of the values of the first field (BW) of U-SIG-1 and the second field (BW_EX) of U-SIG-2 may indicate a channel bandwidth of 640 MHz and its deployment type.

Referring further to FIG. 10C, in some embodiments, U-SIG-1 included in the U-SIG field may include an extended first field (BW'). As an example, the extended first field (BW') may indicate that the channel bandwidth determined for communication is 640 MHz and may indicate the deployment type of the channel bandwidth of 640 MHz.

Figure 11 is a flowchart for explaining a method of operating a first device according to an exemplary embodiment of the present disclosure. As mentioned above, the first device may be a station.

Referring to FIG. 11, in step S200, a first device may receive a PPDU from a second device that is an access point.

In step S210, the first device may identify the channel bandwidth based on the U-SIG field of the preamble of the PPDU. In an exemplary embodiment, the first device may decode the preamble of the PPDU and identify the channel bandwidth through which the PPDU is transmitted based on the decoding result. Specifically, the first device extracts at least one of the first field and the second field of the U-SIG field, and determines the channel bandwidth through which the PPDU is transmitted based on at least one of the value of the first field and the value of the second field. can be identified.

In step S220, the first device may determine whether the channel bandwidth identified in step S210 matches the preset channel bandwidth. When the first device and the second device establish a connection, the second device may inform the first device of the preset channel bandwidth for communication in advance. The first device can confirm whether the PPDU was transmitted to it by determining whether the identified channel bandwidth matches the preset channel bandwidth.

When step S220 is 'YES', following step S230, the first device may decode the remaining PPDU excluding the part (eg, preamble) decoded in step S210. That is, when the identified channel bandwidth matches the preset channel bandwidth, the first device can confirm that the corresponding PPDU is a PPDU transmitted to it, and obtain data by decoding the payload of the PPDU.

When step S240 is 'NO', following step S240, the first device can skip decoding of the remaining PPDU. That is, when the identified channel bandwidth and the preset channel bandwidth do not match, the first device can confirm that the corresponding PPDU is not a PPDU transmitted to the first device and skip decoding of the remaining PPDU. Additionally, the first device may delete the corresponding PPDU.

Figure 12 is a diagram showing examples of devices for wireless communication according to an exemplary embodiment of the present disclosure. Specifically, FIG. 12 shows an IoT (Internet of Things) network system including home appliances 241, home appliances 242, entertainment devices 243, and access points 245.

In some embodiments, in the device for wireless communication of FIG. 12, a first field that may indicate a channel bandwidth of 640 MHz and a deployment type thereof to support a channel bandwidth of up to 640 MHz, as described above with reference to the figures. and a PPDU including the second field may be transmitted, and through this, information on the channel frequency through which the PPDU is transmitted may be accurately transmitted. Accordingly, in a WLAN system, communication through various channel bandwidths including 640 MHz can be effectively supported.

As above, exemplary embodiments are disclosed in the drawings and specifications. In this specification, embodiments have been described using specific terms, but this is only used for the purpose of explaining the technical idea of the present disclosure and is not used to limit the meaning or scope of the present disclosure as set forth in the patent claims. . Therefore, those skilled in the art will understand that various modifications and other equivalent embodiments are possible. Therefore, the true technical protection scope of the present disclosure should be determined by the technical spirit of the attached patent claims.

Claims (20)

In a wireless communication method of a first device,
Receiving a physical layer protocol data unit (PPDU) from a second device; and
A wireless communication method comprising identifying a channel bandwidth of the PPDU based on values of a first field and a second field related to the channel bandwidth of the PPDU extracted from a signal field included in the PPDU. According to paragraph 1,
The channel bandwidth of the PPDU is,
A wireless communication method characterized in that any one of 20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz and 640 MHz. According to paragraph 1,
When the channel bandwidth of the PPDU is 640 MHz,
The step of identifying the channel bandwidth of the PPDU includes:
Identifying that the channel bandwidth of the PPDU is 640 MHz based on the value of the first field; and
A wireless communication method comprising identifying a configuration type of a channel bandwidth of the PPDU identified as 640 MHz based on the value of the second field. According to paragraph 3,
The number of first bits included in the first field is 3,
The first to fourth values of the first bits respectively indicate that the channel bandwidth of the PPDU is one of 20 MHz, 40 MHz, 80 MHz, and 160 MHz, and
The fifth and sixth values of the first bits respectively indicate that the channel bandwidth of the PPDU is one of 320 MHz of the first deployment type and 320 MHz of the second deployment type,
The seventh value of the first bits indicates that the channel bandwidth of the PPDU is 640 MHz,
The number of second bits included in the second field is 2,
The first to fourth values of the second bits each indicate that the channel bandwidth of the PPDU has one of the third to sixth configuration types. According to paragraph 1,
When the channel bandwidth of the PPDU is 640 MHz,
The step of identifying the channel bandwidth of the PPDU includes:
Identifying that the channel bandwidth of the PPDU is 640 MHz based on the value of the first field; and
Identifying a deployment type of the channel bandwidth of the PPDU identified as 640 MHz based on a combination of the value of the first field and the value of the second field. According to clause 5,
The number of first bits included in the first field is 3,
The first to fourth values of the first bits respectively indicate that the channel bandwidth of the PPDU is one of 20 MHz, 40 MHz, 80 MHz, and 160 MHz, and
The fourth and fifth values of the first bits respectively indicate that the channel bandwidth of the PPDU is one of 320 MHz of the first deployment type and 320 MHz of the second deployment type,
The sixth value of the first bits indicates that the channel bandwidth of the PPDU is 640 MHz for the third batch type or 640 MHz for the fourth batch type,
The seventh value of the first bits indicates that the channel bandwidth of the PPDU is 640 MHz for the fifth batch type or 640 MHz for the sixth batch type,
The second field includes one second bit,
When the values of the first bits are the sixth value, the first value and the second value of the second bit indicate that the channel bandwidth of the PPDU is one of the third deployment type and the fourth deployment type, respectively,
When the values of the first bits are the seventh value, the first value and the second value of the second bit indicate that the channel bandwidth of the PPDU is one of the fifth configuration type and the sixth configuration type, respectively. A wireless communication method characterized by indicating a type. According to paragraph 1,
When the channel bandwidth of the PPDU is either 320 MHz or 640 MHz,
The step of identifying the channel bandwidth of the PPDU includes:
Identifying that the channel bandwidth of the PPDU is one of 320 MHz and 640 MHz based on the value of the first field; and
A wireless communication method comprising the step of identifying a deployment type of a channel bandwidth of the PPDU identified as one of 320 MHz and 640 MHz based on a combination of the value of the first field and the value of the second field. . In clause 7,
The number of first bits included in the first field is 3,
The first to fourth values of the first bits respectively indicate that the channel bandwidth of the PPDU is one of 20 MHz, 40 MHz, 80 MHz, and 160 MHz, and
The fifth value of the first bits indicates that the channel bandwidth of the PPDU is 320 MHz,
The sixth value of the first bits indicates that the channel bandwidth of the PPDU is 640 MHz,
The number of second bits included in the second field is 2,
When the value of the first bits is the fifth value, the first value and the second value of the second bits are respectively a channel bandwidth of 320 MHz of the PPDU having one of the first deployment type and the second deployment type. pointing to,
When the values of the first bits are the sixth value, the first to fourth values of the second bits each have a channel bandwidth of 640 MHz of the PPDU having any one of the third to sixth configuration types. A wireless communication method characterized by pointing to. According to paragraph 1,
The length of the bits of the first field is,
A wireless communication method, characterized in that longer than the bit length of the second field. According to paragraph 1,
The signal field is,
A wireless communication method further comprising at least one field disposed between the first field and the second field. According to paragraph 1,
determining whether the channel bandwidth of the identified PPDU matches a preset channel bandwidth; and
A wireless communication method further comprising performing decoding on the PPDU based on a determination result. According to clause 11,
In the step of performing decoding on the PPDU,
A wireless communication method, wherein decoding of the payload of the PPDU is skipped when the determination result indicates inconsistency. According to paragraph 1,
The step of identifying the channel bandwidth of the PPDU includes:
extracting the first field from the signal field;
determining whether to extract the second field based on the value of the first field; and
A wireless communication method comprising selectively extracting the second field from the signal field based on a determination result. In a wireless communication method of a first device,
Receiving a physical layer protocol data unit (PPDU) from a second device;
extracting an extended field regarding a channel bandwidth of the PPDU from a signal field included in the PPDU; and
A wireless communication method comprising identifying whether the channel bandwidth of the PPDU is one of 20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz, and 640 MHz based on the value of the extended field. According to clause 14,
The number of bits included in the extended field is 4,
The first to fourth values of the bits respectively indicate that the channel bandwidth of the PPDU is one of 20 MHz, 40 MHz, 80 MHz, and 160 MHz, and
The fifth and sixth values of the bits respectively indicate that the channel bandwidth of the PPDU is either 320 MHz of the first deployment type or 320 MHz of the second deployment type,
The seventh to tenth values of the bits indicate that the channel bandwidth of the PPDU is 640 MHz for the third batch type, 640 MHz for the fourth batch type, 640 MHz for the fifth batch type, and 640 MHz for the sixth batch type, respectively. A wireless communication method characterized in that it indicates any one of the following. In a wireless communication method of a second device communicating with a first device,
determining a channel bandwidth for transmitting a physical layer protocol data unit (PPDU) to the first device;
generating a first field and a second field indicating the determined channel bandwidth;
generating a PPDU that includes the first field and the second field and conforms to the determined channel bandwidth; and
A wireless communication method comprising transmitting the PPDU to the first device. According to clause 16,
In determining the channel bandwidth,
A wireless communication method characterized in that one of 20 MHz, 40 MHz, 80 MHz, 160 MHz, 320 MHz and 640 MHz is determined as the channel bandwidth. According to clause 17,
When 640 MHz is determined as the channel bandwidth,
A wireless communication method further comprising forming a channel bandwidth of 640 MHz using channel bandwidths of 320 MHz arranged adjacent to each other on the frequency axis. According to clause 16,
In the step of determining the channel bandwidth, 640 MHz is determined as the channel bandwidth,
The step of generating the first field and the second field is,
Setting the value of the first field to indicate that the determined channel bandwidth is 640 MHz; and
A wireless communication method comprising setting a value of the second field to indicate the determined deployment type of the channel bandwidth. According to clause 16,
In the step of determining the channel bandwidth, 640 MHz is determined as the channel bandwidth,
The step of generating the first field and the second field is,
A wireless communication method comprising setting the value of the first field and the value of the second field to have a combination value indicating that the determined channel bandwidth is 640 MHz and indicating a deployment type of the determined channel bandwidth. .

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