Access Point, Station, and Wireless Communication Method

Abstract

An access point (AP), a station (STA) and a wireless communication method are provided. The wireless communication method includes: an STA determines operation mode information, the operation mode information including a maximum number of spatial streams (NSS) supported by the STA when transmitting or receiving an ultra-high throughput (EHT) physical layer protocol data unit (PPDU); and the STA determines the maximum NSS based on an operation channel width of the STA and a bandwidth (BW) of an EHT PPDU. This can solve the problems in the prior art, efficiently change an operation mode (OM), and provide good communication performance and / or high reliability.

Description

Technical Field

[0001] The present application relates to the field of communication systems, and particularly to an access point (AP), a station (STA), and a wireless communication method that can provide good communication performance and / or high reliability.

Background Art

[0002] To provide various types of communication content such as voice, video, packet data, messaging, broadcast, etc., communication systems such as wireless communication systems are widely popular. Such a communication system can be a multi - access system that can support communication with multiple users by sharing available system resources (time, frequency, power, etc.). A wireless network can include one or more stations (STA) or mobile devices and an access point (AP) that can communicate with them. The wireless network can be a wireless local area network (WLAN) such as a Wi - Fi (Institute of Electrical and Electronics Engineers (IEEE) 802.11) network. Using a WLAN, users can wirelessly access the Internet based on wireless frequency technology within a home, office, or a specific service area. Mobile terminals include personal digital assistants (PDA), desktop computers, portable multimedia players (PMP), smartphones, etc. The AP can be connected to a network such as the Internet, enabling mobile devices to communicate via the network (or communicate with other devices connected to the AP). Wireless devices can communicate bi - directionally with network devices. For example, in a WLAN, an STA can communicate with an associated AP via a downlink and an uplink. The downlink refers to the communication link from the AP to the STA, and the uplink refers to the communication link from the STA to the AP.

[0003] IEEE 802.11 TGbe is developing a new IEEE 802.11 amendment. This amendment defines an Extremely High Throughput (EHT) Physical layer (PHY) and a Medium Access Control (MAC) layer, and supports a maximum throughput of 30 Gigabits per second (Gbps). Therefore, it is proposed to increase the maximum channel bandwidth to 320 MHz and support up to 16 spatial streams. However, efficiently changing the operating mode (OM) of the IEEE 802.11be EHT WLAN remains an unsolved problem.

[0004] Therefore, there is a need for an access point (AP), a station (STA), and a wireless communication method that can solve the problems in the prior art, efficiently change the OM, and provide good communication performance and / or high reliability. SUMMARY OF THE INVENTION

[0005] An object of the present invention is to propose an access point (AP), a station (STA), and a wireless communication method that can solve the problems in the prior art, efficiently change the OM, and provide good communication performance and / or high reliability.

[0006] According to a first aspect of the present invention, a wireless communication method includes: a station (STA) determining operation mode information, where the operation mode information includes the maximum number of spatial streams (NSS) supported by the STA when transmitting or receiving an Extremely High Throughput (EHT) Physical layer Protocol Data Unit (PPDU); and the STA determining the maximum NSS based on the operation channel bandwidth of the STA and the bandwidth (BW) of the EHT PPDU.

[0007] According to a second aspect of the present invention, a wireless communication method includes an access point (AP) determining operation mode information, where the operation mode information includes the maximum number of spatial streams (NSS) supported by the AP when transmitting or receiving an extremely high throughput (EHT) physical layer protocol data unit (PPDU), and the AP determining the maximum NSS based on the operation channel width of the AP and the bandwidth (BW) of the EHT PPDU.

[0008] According to a third aspect of the present invention, a station (STA) includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to determine operation mode information, where the operation mode information includes the maximum number of spatial streams (NSS) supported by the STA when transmitting or receiving an extremely high throughput (EHT) physical layer protocol data unit (PPDU), and determine the maximum NSS based on the operation channel width of the STA and the bandwidth (BW) of the EHT PPDU.

[0009] According to a fourth aspect of the present invention, an access point (AP) includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to determine operation mode information, where the operation mode information includes the maximum number of spatial streams (NSS) supported by the AP when transmitting or receiving an extremely high throughput (EHT) physical layer protocol data unit (PPDU), and determine the maximum NSS based on the operation channel width of the AP and the bandwidth (BW) of the EHT PPDU.

[0010] According to a fifth aspect of the present invention, a non-transitory machine-readable storage medium stores instructions that, when executed by a computer, cause the computer to execute the method described above.

[0011] According to a sixth aspect of the present invention, the chip includes a processor, and the processor calls and executes a computer program stored in a memory to cause a device on which the chip is mounted to execute the method described above.

[0012] According to a seventh aspect of the present invention, a computer-readable storage medium stores a computer program, and the computer program causes a computer to execute the method described above.

[0013] According to an eighth aspect of the present invention, a computer program product includes a computer program, and the computer program causes a computer to execute the method described above.

[0014] According to a ninth aspect of the present invention, a computer program causes a computer to execute the method described above.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

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Figure 5A

Figure 5B

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Figure 6C

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Figure 8C

Figure 9

[0016] To more clearly explain the embodiments in the present invention or related technologies, the above drawings will be described in the brief description of the embodiments. Obviously, these drawings are only some embodiments of the present invention, and those skilled in the art can obtain other related drawings based on these drawings without creative effort.

[0017] With reference to the above drawings, the technical content, structural features, implementation objectives, and technical effects of the embodiments of the present invention will be described in detail. Specifically, the terms in the embodiments of the present invention are used only for the purpose of explaining specific embodiments and do not limit the present invention.

[0018] The following table shows some abbreviations that can be used in some embodiments of the present invention. TIFF0007717850000001.tif253170TIFF0007717850000002.tif31170

[0019] For the purpose of explaining the innovative aspects of the present invention, specific embodiments will be described below. However, those skilled in the art can easily recognize that the teachings of this specification can be applied in various ways. The described embodiments can be implemented in any device, system, or network capable of transmitting and receiving radio frequency (RF) signals according to any of the following technologies. That is, the IEEE 802.11 standard, Bluetooth (R)Specifications, Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Global System for Mobile communication (GSM), GSM / General Packet Radio Service (GPRS), Enhanced Data GSM Environment (EDGE), Terrestrial Trunked Radio (TETRA), Wideband-CDMA (W-CDMA), Evolution Data Optimized (EV-DO), 1×EV-DO, EV-DO Rev A, EV-DO Rev B, High Speed Packet Access (HSPA), High Speed Downlink Packet Access (HSDPA), High Speed Uplink Packet Access (HSUPA), Evolved High Speed Packet Access (HSPA+), Long Term Evolution (LTE), AMPS, or other known signals used for communication in a wireless network, cellular network or Internet of Things (IOT), such as systems utilizing 3G, 4G or 5G, or further implementations and technologies thereof.

[0020] FIG. 1 shows an example of a wireless communication system according to an embodiment of the present invention. The wireless communication system is an example of a wireless local area network (WLAN) 100 (also referred to as a Wi-Fi network) configured according to various aspects of the present invention, and examples include a next-generation network, NBT (Next Big Thing), UHT (Ultra-High Throughput), or EHT Wi-Fi network. As described above, the terms next-generation, NBT, UHT, and EHT are synonymous and each can correspond to one Wi-Fi network that supports a large-capacity spatio-temporal stream. WLAN 100 may include an AP 10 and a plurality of associated STAs 20, and the STAs 20 can be represented as devices such as mobile stations, personal digital assistants (PDAs), other handheld devices, netbooks, laptops, tablets, laptops, display devices (such as TVs and computer monitors), printers, etc. The AP 10 and the associated stations 20 can represent a basic service set (BSS) or an extended service set (ESS). Various STAs 20 within the network can communicate with each other via the AP 10. FIG. 1 also shows a coverage area 110 of the AP 10, which can represent the basic service area (BSA) of the WLAN 100. An extended network station (not shown) associated with the WLAN 100 can be connected to a wired distribution system or a wireless distribution system, and the connection to the wired distribution system or the wireless distribution system enables connection to a plurality of APs 10 within the ESS.

[0021] In some embodiments, STA20 may be located at the intersection of multiple coverage areas 110 and associated with multiple APs 10. A single AP 10 and an associated set of STAs 20 can be called a BSS. An ESS is a connected set of BSSs. A distribution system (not shown) can be used to connect to the APs 10 within the ESS. In some cases, the coverage area 110 of an AP 10 may be divided into sectors (not shown). The WLAN 100 may include different types of APs 10 (metropolitan area, home network, etc.) and have different and overlapping coverage areas 110. Two STAs 20 can also communicate directly via a direct wireless link 125, regardless of whether both STAs 20 are located within the same coverage area 110. Examples of direct wireless links 120 can include Wi-Fi direct connections, Wi-Fi channel direct link setup (TDLS) links, and other group connections. The STAs 20 and APs 10 can communicate according to the WLAN wireless protocol and baseband protocol of the physical layer and media access control (MAC) layer of IEEE 802.11. The versions of IEEE 802.11 include, but are not limited to, 802.11b, 802.11g, 802.11a, 802.11n, 802.11ac, 802.11ad, 802.11ah, 802.11ax, 802.11ay, etc. In some other embodiments, a point-to-point connection or an ad hoc network can be implemented in the WLAN 100.

[0022] FIG. 2 is a block diagram of communication between one or more stations (STAs) 20 and one access point (AP) 10 in a wireless communication system 700 according to an embodiment of the present invention. As shown in FIG. 2, the wireless communication system 700 includes an access point (AP) 10 and one or more stations (STAs) 20. The AP 10 includes a memory 12, a transceiver 13, and a processor 11 coupled to the memory 12 and the transceiver 13. The one or more STAs 20 include a memory 22, a transceiver 23, and a processor 21 coupled to the memory 22 and the transceiver 23. The processor 11 or the processor 21 may be configured to implement the proposed functions, procedures, and / or methods described herein. The wireless interface protocol layer may be implemented in the processor 11 or the processor 21. The memory 12 or the memory 22 is operably coupled to the processor 11 or the processor 21, and the memory 12 or the memory 22 stores various information for operating the processor 11 or the processor 21. The transceiver 13 or the transceiver 23 is operably coupled to the processor 11 or the processor 21, and the transceiver 13 or the transceiver 23 transmits and / or receives wireless signals.

[0023] Processor 11 or processor 21 may include an application-specific integrated circuit (ASIC), other chip sets, logic circuits, and / or data processing devices. Memory 12 or memory 22 may include a read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium, and / or other storage devices. Transceiver 13 or transceiver 23 may include a baseband circuit for processing radio frequency signals. When implementing the examples in software, the techniques described herein can be realized by modules (processes, functions, etc.) that execute the functions described herein. The modules can be stored in memory 12 or memory 22 and executed by processor 11 or processor 21. Memory 12 or memory 22 may be implemented inside processor 11 or processor 21, or outside processor 11 or processor 21. When implemented outside processor 11 or processor 21, memory 12 or memory 22 can be communicatively coupled to processor 11 or processor 21 via various devices well known in the art.

[0024] In some embodiments, the processor 11 is configured to determine operation mode information, where the operation mode information includes the maximum number of spatial streams (NSS) supported for transmission or reception by the AP in an Extremely High Throughput (EHT) Physical Layer Protocol Data Unit (PPDU). The processor 11 is further configured to determine the maximum NSS based on the operation channel width of the AP and the bandwidth (BW) of the EHT PPDU. In some embodiments, the AP refers to an independent AP or an AP attached to an AP MLD, and the non-AP STA refers to an independent non-AP STA or a non-AP STA attached to a non-AP MLD. Thereby, the problems in the prior art can be solved, the OM can be efficiently changed, and good communication performance and / or high reliability can be provided.

[0025] In some embodiments, the processor 21 is configured to determine operation mode information, where the operation mode information includes the maximum number of spatial streams (NSS) supported for transmission or reception by the STA in an Extremely High Throughput (EHT) Physical Layer Protocol Data Unit (PPDU). The processor 21 is further configured to determine the maximum NSS based on the operation channel width of the STA and the bandwidth (BW) of the EHT PPDU. Thereby, the problems in the prior art can be solved, the OM can be efficiently changed, and good communication performance and / or high reliability can be provided.

[0026] FIG. 3 shows a wireless communication method 800 executed by an AP according to an embodiment of the present invention. In some embodiments, method 800 includes, in operation 802, an access point (AP) determining operation mode information, where the operation mode information includes the maximum number of spatial streams (NSS) supported for transmission or reception by the AP in an extremely high throughput (EHT) physical layer protocol data unit (PPDU), and in operation 804, the AP determining the maximum NSS based on the operation channel width of the AP and the bandwidth (BW) of the EHT PPDU. In some embodiments, the AP refers to a single AP or an AP attached to an AP MLD, and the non-AP STA refers to a single non-AP STA or a non-AP STA attached to a non-AP MLD. Thereby, problems in the prior art can be solved, the OM can be efficiently changed, and good communication performance and / or high reliability can be provided.

[0027] FIG. 4 shows a wireless communication method 900 executed by a STA according to an embodiment of the present invention. In some embodiments, method 900 includes, in operation 902, a station (STA) determining operation mode information, where the operation mode information includes the maximum number of spatial streams (NSS) supported for transmission or reception by the STA in an extremely high throughput (EHT) physical layer protocol data unit (PPDU), and in operation 904, the STA determining the maximum NSS based on the operation channel width of the STA and the bandwidth (BW) of the EHT PPDU. Thereby, problems in the prior art can be solved, the OM can be efficiently changed, and good communication performance and / or high reliability can be provided.

[0028] According to the present invention, when a STA establishes an association with an AP, both the STA and the AP can determine and exchange their respective initial operation mode information (e.g., operation channel width, maximum number of spatial streams supported for transmission or reception). Thereafter, the STA (or AP) can change its operation mode for some purpose (such as power saving) and notify the AP (or STA) of the change in the operation mode via a MAC frame.

[0029] According to the present invention, a STA can transmit an EHT capability element in a probe request frame, an association request frame, or a re-association request frame. An AP can transmit an EHT capability element in a beacon frame, a probe response frame, an association response frame, or a re-association response frame. The EHT capability element includes a Supported EHT-MCS And NSS Set field, which indicates combinations of EHT-MCS 0 to EHT-MCS 13 and the number of spatial streams (NSS) supported for reception by the STA, and combinations supported for transmission by the STA. FIG. 5A shows an exemplary format of the Supported EHT-MCS And NSS Set field.

[0030] When the operating channel width of the STA is greater than or equal to 80 MHz, the EHT-MCS mapping (excluding only STAs with BW ≤ 80 MHz and 20 MHz) subfield indicates, for each EHT-MCS value, the maximum number of spatial streams supported for reception by the STA and the maximum number of spatial streams that the STA can transmit in an EHT PPDU where the BW is 20 MHz, 40 MHz, or 80 MHz. When the operating channel width of the STA is greater than or equal to 160 MHz, the EHT-MCS mapping (BW = 160 MHz) subfield indicates, for each EHT-MCS value, the maximum number of spatial streams supported for reception by the STA and the maximum number of spatial streams that the STA can transmit in an EHT PPDU where the BW is 160 MHz. When the operating channel width of the STA is equal to 320 MHz, the EHT-MCS mapping (BW = 320 MHz) subfield indicates, for each EHT-MCS value, the maximum number of spatial streams supported for reception by the STA and the maximum number of spatial streams that the STA can transmit in an EHT PPDU where the BW is 320 MHz. The EHT-MCS mapping (excluding only STAs with BW ≤ 80 MHz and 20 MHz), the EHT-MCS mapping (BW = 160 MHz), and the EHT-MCS mapping (BW = 320 MHz) subfields have an exemplary format as shown in FIG. 5B.

[0031] First Embodiment According to the first embodiment, the operation mode information can be carried in an operation mode notification frame or an operation mode notification element, and the operation mode notification element may be included in one MAC frame (for example, an association request frame or a re-association request frame).

[0032] According to the first embodiment, FIG. 6A shows an exemplary format of the operation mode notification element.

[0033] The operation mode notification frame is a VHT action frame. According to the first embodiment, the action field of the operation mode notification frame contains information as shown in Table 1.

Table 1

[0034] As shown in FIG. 6A and Table 1, the operation mode field and the EHT operation mode field are present within the operation mode notification frame and the operation mode notification element. FIG. 6B and FIG. 6C show the operation mode field and the EHT operation mode field, respectively.

[0035] According to the first embodiment, when the Rx NSS type subfield is 0, the channel width subfield of the operation mode field, together with the 160 / 80+80BW subfield of the operation mode field and the 320BW subfield of the EHT operation mode field, indicates the operation channel width supported by the STA for reception and transmission. Table 2 shows the coding examples of the channel width subfield, the 160 / 80+80BW subfield, and the 320BW subfield.

Table 2

[0036] According to the first embodiment, when the Rx NSS type subfield is 0 and the operation channel width supported by the STA is less than or equal to 80 MHz, the Rx NSS extension (BW≦80MHz) subfield of the EHT operation mode field, together with the Rx NSS (BW≦80MHz) subfield of the operation mode field, is the maximum number of spatial streams N supported by the STA when receiving an EHT PPDU with a BW less than or equal to the operation channel width supported by the STA. SS is indicated, and N SS is set to -1. Here, the Rx NSS extension (BW≦80MHz) subfield provides the most significant bit (MSB) of N SS , and the Rx NSS (BW≦80MHz) subfield is N SSProvides the three least significant bits (LSBs). In this case, the Rx NSS (BW = 160 MHz) subfield and the Rx NSS (BW = 320 MHz) subfield of the EHT operation mode field are reserved.

[0037] According to the first embodiment, when the Rx NSS type subfield is 0 and the operation channel bandwidth supported by the STA is greater than 80 MHz, the Rx NSS extension (BW ≤ 80 MHz) subfield of the EHT operation mode field, together with the Rx NSS (BW ≤ 80 MHz) subfield of the operation mode field, when receiving an EHT PPDU with BW of 20 MHz, 40 MHz, and 80 MHz, the maximum number of spatial streams N SS supported by the STA SS is set to N SS - 1. Here, the Rx NSS extension (BW ≤ 80 MHz) subfield provides the MSB of N SS and the Rx NSS (BW ≤ 80 MHz) subfield provides the three LSBs of N SS The Rx NSS (BW = 160 MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N SS supported by the STA when receiving an EHT PPDU with BW of 160 MHz, and is set to N SS - 1. When the Rx NSS type subfield is 0 and the operation channel bandwidth supported by the STA is 160 MHz, the Rx NSS (BW = 320 MHz) subfield of the EHT operation mode field is reserved. When the Rx NSS type subfield is 0 and the operation channel bandwidth supported by the STA is 320 MHz, the Rx NSS (BW = 320 MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N SS supported by the STA when receiving an EHT PPDU with BW of 320 MHz, and is set to N SS - 1.

[0038] According to the first embodiment, when the operation channel width supported by the STA is less than or equal to 80 MHz, the Tx NSS (BW≦80MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N supported by the STA when transmitting an EHT PPDU with a BW less than or equal to the operation channel width supported by the STA. SS and is set to N SS -1. In this case, the Tx NSS (BW = 160MHz) subfield and the Tx NSS (BW = 320MHz) subfield of the EHT operation mode field are reserved.

[0039] According to the first embodiment, when the operation channel width supported by the STA is greater than 80 MHz, the Tx NSS (BW≦80MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N supported by the STA when transmitting an EHT PPDU with a BW of 20 MHz, 40 MHz, or 80 MHz. SS and is set to N SS -1. The Tx NSS (BW = 160MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N supported by the STA when transmitting an EHT PPDU with a BW of 160 MHz. SS and is set to N SS -1. When the operation channel width supported by the STA is 160 MHz, the Tx NSS (BW = 320MHz) subfield of the EHT operation mode field is reserved. When the operation channel width supported by the STA is 320 MHz, the Tx NSS (BW = 320MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N supported by the STA when transmitting an EHT PPDU with a BW of 320 MHz. SS and is set to N SS -1.

[0040] According to the first embodiment, the permitted UL MU operations and the permitted frame types transmitted as responses to trigger frames are determined by the UL MU disabling subfield and the UL MU data disabling subfield. For example, when both the UL MU disabling subfield and the UL MU data disabling subfield are set to 0, the STA enables all trigger-based UL MU transmissions. When the UL MU disabling subfield is set to 1 and the UL MU data disabling subfield is set to 0, the STA suspends all trigger-based UL MU transmissions, and the STA stops responding to received trigger frames. When the UL MU disabling subfield is set to 0 and the UL MU data disabling subfield is set to 1, the transmission of trigger-based UL MU data frames in response to basic trigger frames can be suspended by the STA, but other trigger-based UL MU transmissions can remain enabled by the STA.

[0041] According to the first embodiment, the STA sets the DL MU-MIMO Resound Recommendation subfield to 1 to instruct the AP to re-measure the channel with the STA or to recommend increasing the channel sounding frequency. By setting the subfield to 0, the STA is instructed that there is no recommendation regarding the AP channel sounding frequency.

[0042] According to the first embodiment, when the AP transmits an operation mode notification frame or an operation mode notification element, the Tx NSS (BW≦80MHz) subfield, the Tx NSS (BW=160MHz) subfield, the Tx NSS (BW=320MHz) subfield, the DL MU-MIMO recommendation subfield, the UL MU disabling subfield, and the UL MU data disabling subfield are reserved.

[0043] Second Embodiment According to the second embodiment, the operation mode information can be carried in the EHT operation mode notification frame or the EHT operation mode notification element, and the EHT operation mode notification frame or the EHT operation mode notification element is included in a MAC frame (such as an association request frame or a re-association request frame). FIG. 7A shows an exemplary format of the EHT operation mode notification element according to the second embodiment.

[0044] The EHT operation mode notification frame is an EHT action frame. According to the second embodiment, the action field of the EHT operation mode notification frame includes information as shown in Table 3.

Table 3

[0045] As shown in FIGS. 7A and 3, the EHT operation mode field exists within the EHT operation mode notification frame and the EHT operation mode notification element. FIG. 7B shows an exemplary format of the EHT operation mode field according to the second embodiment.

[0046] According to the second embodiment, the channel width subfield of the EHT operation mode field indicates the receive and transmit operation channel widths supported by the STA. Table 4 shows an encoding example of the channel width subfield according to the second embodiment.

Table 4

[0047] According to the second embodiment, when the operation channel width supported by the STA is less than or equal to 80 MHz, the Rx NSS (BW≦80 MHz) subfield of the EHT operation mode field is the maximum number of spatial streams N SS supported by the STA when receiving an EHT PPDU with a BW less than or equal to the operation channel width supported by the STA, and N SSIt is set to -1. In this case, the Rx NSS (BW = 160 MHz) subfield and the Rx NSS (BW = 320 MHz) subfield of the EHT operation mode field are reserved.

[0048] According to the second embodiment, when the operation channel bandwidth supported by the STA is greater than 80 MHz, the Rx NSS (BW ≤ 80 MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N SS supported by the STA when receiving an EHT PPDU with a BW of 20 MHz, 40 MHz, or 80 MHz, and is set to N SS -1. The Rx NSS (BW = 160 MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N SS supported by the STA when receiving an EHT PPDU with a BW of 160 MHz, and is set to N SS -1. When the operation channel bandwidth supported by the STA is 160 MHz, the Rx NSS (BW = 320 MHz) subfield of the EHT operation mode field is reserved. When the operation channel bandwidth supported by the STA is 320 MHz, the Rx NSS (BW = 320 MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N SS supported by the STA when receiving an EHT PPDU with a BW of 320 MHz, and is set to N SS -1.

[0049] According to the second embodiment, when the operation channel bandwidth supported by the STA is less than or equal to 80 MHz, the Tx NSS (BW ≤ 80 MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N SS supported by the STA when transmitting an EHT PPDU with a BW less than or equal to the operation channel bandwidth supported by the STA, and is set to N SSIt is set to -1. In this case, the Tx NSS (BW = 160 MHz) subfield and the Tx NSS (BW = 320 MHz) subfield of the EHT operation mode field are reserved.

[0050] According to the second embodiment, when the operation channel bandwidth supported by the STA is greater than 80 MHz, the Tx NSS (BW ≤ 80 MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N SS supported by the STA when transmitting an EHT PPDU with a BW of 20 MHz, 40 MHz, or 80 MHz, and is set to N SS -1. The Tx NSS (BW = 160 MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N SS supported by the STA when transmitting an EHT PPDU with a BW of 160 MHz, and is set to N SS -1. When the operation channel bandwidth supported by the STA is 160 MHz, the Tx NSS (BW = 320 MHz) subfield of the EHT operation mode field is reserved. When the operation channel bandwidth supported by the STA is 320 MHz, the Tx NSS (BW = 320 MHz) subfield of the EHT operation mode field indicates the maximum number of spatial streams N SS supported by the STA when transmitting an EHT PPDU with a BW of 320 MHz, and is set to N SS -1.

[0051] According to the second embodiment, the UL MU inactivation subfield and the UL MU data inactivation subfield determine the permitted UL MU operations and the permitted frame types transmitted as responses to trigger frames. For example, when both the UL MU inactivation subfield and the UL MU data inactivation subfield are set to 0, the STA enables all trigger-based UL MU transmissions. When the UL MU inactivation subfield is set to 1 and the UL MU data inactivation subfield is set to 0, the STA suspends all trigger-based UL MU transmissions, and the STA stops responding to received trigger frames. When the UL MU inactivation subfield is set to 0 and the UL MU data inactivation subfield is set to 1, the transmission of trigger-based UL MU data frames in response to basic trigger frames can be suspended by the STA, but other trigger-based UL MU transmissions can remain enabled by the STA.

[0052] According to the second embodiment, the STA sets the DL MU-MIMO remeasurement recommendation subfield to 1 to instruct the STA to recommend that the AP remeasure the channel with the STA or increase the channel sounding frequency. By setting the subfield to 0, the STA is instructed that there is no recommendation regarding the AP channel sounding frequency.

[0053] According to the second embodiment, when the AP transmits an EHT operation mode notification frame or an EHT operation mode notification element, the Tx NSS (BW≦80MHz) subfield, the Tx NSS (BW=160MHz) subfield, the Tx NSS (BW=320MHz) subfield, the DL MU-MIMO remeasurement recommendation subfield, the UL MU inactivation subfield, and the UL MU data inactivation subfield are reserved.

[0054] The third embodiment According to the third embodiment, operation mode information can be carried in the HE variant HT control field of a data frame or a management frame. The HE variant HT control field includes an A-Control subfield. The A-Control subfield may include an OM control subfield and an EHT OM control subfield. FIG. 8A shows an exemplary format of the HE variant HT control field. Here, both bit B0 and bit B1 are set to 1 to indicate the HE variant HT control field. The OM control subfield includes a 4-bit control ID field (set to 1) and a 12-bit control information field, and the EHT OM control subfield includes a 4-bit control ID field (set to 7) and a 6-bit control information field. FIGS. 8B and 8C show exemplary formats of the control information field in the OM control subfield and the control information field in the EHT OM control subfield, respectively.

[0055] The channel width extension subfield in the EHT OM control subfield, together with the channel width subfield in the OM control subfield, indicates the receive and transmit operation channel widths supported by the STA. Table 5 shows an encoding example of the channel width subfield and the channel width extension subfield.

Table 5

[0056] According to the third embodiment, when the operation channel width of the STA is less than or equal to 80 MHz, the Rx NSS extension subfield in the EHT OM control subfield, together with the Rx NSS subfield in the OM control subfield, indicates the maximum number of spatial streams N SS supported by the STA when receiving an EHT PPDU whose BW is less than or equal to the operation channel width of the STA, and is set to N SS -1. Here, the Rx NSS extension subfield provides the MSB of N SS and the Rx NSS subfield is NSS provides the three LSBs of

[0057] According to the third embodiment, when the operating channel width of the STA is 160 MHz, the Rx NSS extension subfield in the EHT OM control subfield, together with the Rx NSS subfield in the OM control subfield, when receiving an EHT PPDU with a BW less than or equal to 80 MHz, the maximum number of spatial streams N supported by the STA SS is indicated, and N SS is set to -1. Here, the Rx NSS extension subfield provides the MSB of N SS and the Rx NSS subfield provides the three LSBs of N SS

[0058] According to the third embodiment, when the operating channel width of the STA is 160 MHz, according to Equation 1, when receiving an EHT PPDU with a BW of 160 MHz, the maximum number of spatial streams supported by the STA is determined.

Equation

[0059] TIFF0007717850000009.tif52170

[0060] According to the third embodiment, when the operating channel width of the STA is less than or equal to 80 MHz, the Tx NSTS extension subfield in the EHT OM control subfield, together with the Tx NSTS subfield in the OM control subfield, when transmitting an EHT PPDU with a BW less than or equal to the operating channel width of the STA, the maximum number of time - spatial streams N supported by the STA STS is indicated, and N STS is set to -1. Here, the Tx NSTS extension subfield provides the MSB of N STS and the Tx NSTS subfield provides the three LSBs of N STS ​provides the three LSBs. It should be noted that since the EHT PPDU does not support STBC, the maximum number of spatial streams N during transmission supported by the STA STS is equal to the maximum number of spatial streams N during transmission supported by the STA SS .

[0061] According to the third embodiment, when the operating channel width of the STA is 160 MHz, the Tx NSTS extension subfield in the EHT OM control subfield, together with the Tx NSTS subfield in the OM control subfield, indicates the maximum number of spatial streams N supported by the STA when transmitting an EHT PPDU with a BW less than or equal to 80 MHz STS and is set to N STS - 1. Here, the Tx NSTS extension subfield provides the MSB of N STS , and the Tx NSTS subfield provides the three LSBs of N STS . As described above, since the EHT PPDU does not support STBC, the maximum number of spatial streams N during transmission supported by the STA STS is equal to the maximum number of spatial streams N during transmission supported by the STA SS .

[0062] According to the third embodiment, when the operating channel width of the STA is 160 MHz, the maximum number of spatial streams supported by the STA when transmitting an EHT PPDU with a BW of 160 MHz is determined by Equation 2

Equation

[0063] TIFF0007717850000011.tif45170

[0064] According to the third embodiment, when the operating channel width of the STA is 320 MHz, the following options are used to determine the maximum number of spatial streams supported by the STA during reception or transmission.

[0065] First option According to the first option, when the operating channel width of the STA is 320 MHz, the Rx NSS extension subfield in the EHT OM control subfield, together with the Rx NSS subfield in the OM control subfield, determines the maximum number of spatial streams N supported by the STA when receiving an EHT PPDU with a BW less than or equal to 80 MHz. SS is indicated, and N SS is set to -1. Here, the Rx NSS extension subfield provides the MSB of N SS and the Rx NSS subfield provides the three LSBs of N SS .

[0066] According to the first option, when the operating channel width of the STA is 320 MHz, the maximum number of spatial streams supported by the STA when receiving an EHT PPDU with a BW of 160 MHz is determined by Equation 1, and the maximum number of spatial streams supported by the STA when receiving an EHT PPDU with a BW of 320 MHz is determined by Equation 3.

Number

[0067] TIFF0007717850000013.tif26170

[0068] According to the first option, when the operating channel width of the STA is 320 MHz, the Tx NSTS extension subfield in the EHT OM control subfield, together with the Tx NSTS subfield in the OM control subfield, determines the maximum number of spatial streams N supported by the STA when transmitting an EHT PPDU with a BW less than or equal to 80 MHz. STS is indicated, and NSTS It is set to -1. Here, the Tx NSTS extension subfield provides the MSB of N, and the Tx NSTS subfield provides the three LSBs of N. SS As described above, since the EHT PPDU does not support STBC, the maximum number of spatial streams N at transmission supported by the STA STS is equal to the maximum number of spatial streams N at transmission supported by the STA. STS is equal to the maximum number of spatial streams N at transmission supported by the STA. SS is equal to.

[0069] According to the first option, when the operating channel width of the STA is 320 MHz, the maximum number of spatial streams supported by the STA is determined by Equation 2 when transmitting an EHT PPDU with a BW of 160 MHz, and the maximum number of spatial streams supported by the STA is determined by Equation 4 when transmitting an EHT PPDU with a BW of 320 MHz.

Number

[0070] TIFF0007717850000015.tif27170

[0071] Second Option According to the second option, when the operating channel width of the STA is 320 MHz, the Rx NSS extension subfield in the EHT OM control subfield, together with the Rx NSS subfield in the OM control subfield, indicates the maximum number of spatial streams N supported by the STA when receiving an EHT PPDU with a BW less than or equal to 80 MHz, and it is set to N - 1. Here, the Rx NSS extension subfield provides the MSB of N, and the Rx NSS subfield provides the three LSBs of N. SS and it is set to N - 1. Here, the Rx NSS extension subfield provides the MSB of N, and the Rx NSS subfield provides the three LSBs of N. SS is set to -1. Here, the Rx NSS extension subfield provides the MSB of N, and the Rx NSS subfield provides the three LSBs of N. SS As described above, since the EHT PPDU does not support STBC, the maximum number of spatial streams N at transmission supported by the STA SS is equal to the maximum number of spatial streams N at transmission supported by the STA.

[0072] According to the second option, when the operating channel width of the STA is 320 MHz, the maximum number of spatial streams supported by the STA is determined by Equation 1 when receiving an EHT PPDU with a BW of 160 MHz, and the maximum number of spatial streams supported by the STA is determined by Equation 5 when receiving an EHT PPDU with a BW of 320 MHz.

Number

[0073] TIFF0007717850000017.tif26170

[0074] According to the second option, when the operating channel width of the STA is 320 MHz, the Tx NSTS extension subfield in the EHT OM control subfield, together with the Tx NSTS subfield in the OM control subfield, indicates the maximum number of time-spatial streams N supported by the STA when transmitting an EHT PPDU with a BW less than or equal to 80 MHz. STS is set to N STS -1. Here, the Tx NSTS extension subfield provides the MSB of N STS and the Tx NSTS subfield provides the three LSBs of N STS . As described above, since the EHT PPDU does not support STBC, the maximum number of time-spatial streams N supported by the STA during transmission STS is equal to the maximum number of spatial streams N supported by the STA during transmission. SS

[0075] According to the second option, when the operating channel width of the STA is 320 MHz, the maximum number of spatial streams supported by the STA is determined by Equation 2 when transmitting an EHT PPDU with a BW of 160 MHz, and the maximum number of spatial streams supported by the STA is determined by Equation 6 when transmitting an EHT PPDU with a BW of 320 MHz. ​

Number

[0076] TIFF0007717850000019.tif26170

[0077] Option 3 According to Option 3, when the operating channel width of the STA is 320 MHz, the Rx NSS extension subfield within the EHT OM control subfield, together with the Rx NSS subfield within the OM control subfield, indicates the maximum number of spatial streams N supported by the STA when receiving an EHT PPDU with a BW of 160 MHz. SS and N is set to SS N - 1. Here, the Rx NSS extension subfield provides the MSB of N, and the Rx NSS subfield provides the three LSBs of N. SS SS

[0078] According to Option 3, when the operating channel width of the STA is 320 MHz, the maximum number of spatial streams supported by the STA when receiving an EHT PPDU with a BW of 320 MHz is determined by Equation 7.

Number

[0079] The maximum number of spatial streams supported by the STA when receiving an EHT PPDU with a BW less than or equal to 80 MHz is determined by Equation 8.

Number

[0080] According to the third option, when the operating channel width of the STA is 320 MHz, the Tx NSTS extension subfield within the EHT OM control subfield, together with the Tx NSTS subfield within the OM control subfield, indicates the maximum number of spatial streams N supported by the STA when transmitting an EHT PPDU with a BW of 160 MHz. STS where the Tx NSTS extension subfield provides the MSB of N, STS and the Tx NSTS subfield provides the three LSBs of N, STS and N is set to STS N - 1. As described above, since the EHT PPDU does not support STBC, the maximum number of spatial streams N supported by the STA for transmission STS is equal to the maximum number of spatial streams N SS supported by the STA during transmission.

[0081] According to the third option, when the operating channel width of the STA is 320 MHz, Equation 9 is used to determine the maximum number of spatial streams supported by the STA when transmitting an EHT PPDU with a BW of 320 MHz.

Equation

[0082] Equation 10 is used to determine the maximum number of spatial streams supported by the STA when transmitting an EHT PPDU with a BW less than or equal to 80 MHz.

Equation

[0083] According to the third embodiment, when the operating channel width of the STA is 320 MHz, in order to determine the maximum number of spatial streams supported by the STA for reception or transmission, it is determined which one of the above three options to use according to the setting of the calculation method subfield. For example, when the calculation method subfield is set to 0, it means using the first option; when the calculation method subfield is set to 1, it means using the second option; when the calculation method subfield is set to 2, it means using the third option.

[0084] According to the third embodiment, the UL MU inactivation subfield and the UL MU data inactivation subfield determine the permitted UL MU operations and the permitted frame types transmitted as responses to trigger frames. For example, when both the UL MU inactivation subfield and the UL MU data inactivation subfield are set to 0, the STA enables all trigger-based UL MU transmissions. When the UL MU inactivation subfield is set to 1 and the UL MU data inactivation subfield is set to 0, the STA suspends all trigger-based UL MU transmissions, and the STA stops responding to received trigger frames. When the UL MU inactivation subfield is set to 0 and the UL MU data inactivation subfield is set to 1, the transmission of trigger-based UL MU data frames in response to basic trigger frames can be suspended (interrupted) by the STA, but other trigger-based UL MU transmissions can remain enabled by the STA.

[0085] According to the third embodiment, the STA sets the DL MU-MIMO remeasurement recommendation subfield to 1 to recommend to the STA that the AP remeasures the channel with the STA or increase the channel sounding frequency. Setting the subfield to 0 indicates to the STA that there is no recommendation regarding the AP channel sounding frequency.

[0086] According to the third embodiment, when the AP transmits the EHT OM control subfield and the OM control subfield, the Tx NSTS subfield, the Tx NSTS extension subfield, the DL MU-MIMO remeasurement recommendation subfield, the UL MU inactivation subfield, and the UL MU data inactivation subfield are reserved.

[0087] According to the present invention, based on the EHT capability element transmitted by the STA, the maximum received NSS corresponding to all Rx EHT-MCS values in the first predetermined BW, the maximum received NSS corresponding to all Rx EHT-MCS values in the second predetermined BW, and the maximum received NSS corresponding to all Rx EHT-MCS values in the third predetermined BW are determined.

[0088] According to the present invention, based on the EHT capability element transmitted by the STA, the maximum transmitted NSS corresponding to all Rx EHT-MCS values in the first predetermined BW, the maximum transmitted NSS corresponding to all Rx EHT-MCS values in the second predetermined BW, and the maximum transmitted NSS corresponding to all Rx EHT-MCS values in the third predetermined BW are determined.

[0089] According to the present invention, when the operating channel width of the STA is greater than or equal to 80 MHz, in an EHT PPDU with a BW of 20 MHz, 40 MHz, or 80 MHz, the maximum received N SS for a given EHT-MCS value is equal to the smaller of the following.

[0090] - Among the EHT-MCS mapping (excluding STAs with BW ≤ 80 MHz and 20 MHz only) subfields of the EHT capability element corresponding to a given EHT-MCS value, the maximum received N SS (Rx Max Nss) value, the maximum received N SS value supporting the EHT-MCS 10 - 11 fields or the maximum received N SS value supporting the EHT-MCS 12 - 13 fields, any one of them; - When the value of the Rx NSS type is 0, the maximum N supported as indicated by the values of the Rx NSS (BW ≤ 80 MHz) field and the Rx NSS extension (BW ≤ 80 MHz) field in the operation mode notification frame or operation mode notification element SS ; or, the maximum N supported as indicated by the value of the Rx NSS (BW ≤ 80 MHz) field in the EHT operation mode notification frame or EHT operation mode notification element SS ; or, the maximum N supported as indicated by the values of both the Rx NSS extension field and the Rx NSS field in the OM control subfield of the EHT SS 。

[0091] According to the present invention, when the operation channel width of the STA is greater than or equal to 160 MHz, in an EHT PPDU with BW of 160 MHz, the maximum received N for a given EHT - MCS value SS is equal to the smaller of the following

[0092] - Among the EHT - MCS mapping (BW = 160 MHz) subfields of the EHT capability element corresponding to a given EHT - MCS value, the maximum received N that supports the EHT - MCS 0 - 9 fields SS value, the maximum transmitted N that supports the EHT - MCS 10 - 11 fields SS value, or the maximum received N that supports the EHT - MCS 12 - 13 fields SS value, any one of them; - When the value of the Rx NSS type is 0, the maximum N supported as indicated by the value of the Rx NSS (BW = 160 MHz) field in the operation mode notification frame or operation mode notification element SS ; or, the maximum N supported as indicated by the value of the Rx NSS (BW = 160 MHz) field in the EHT operation mode notification frame or EHT operation mode notification element SS ; or, the maximum N supported as indicated by the values of both the Rx NSS extension field and the Rx NSS field in the OM control subfield of the EHT SS 。

[0093] According to the present invention, when the operating channel width of the STA is equal to 320 MHz, in an EHT PPDU with a BW of 320 MHz, the maximum received N of a given EHT-MCS value SS is equal to the smaller of the following.

[0094] - Among the EHT-MCS mapping (BW = 320 MHz) subfields of the EHT capability element corresponding to a given EHT-MCS value, the maximum received N that supports the EHT-MCS 0 to 9 fields SS value, the maximum transmitted N that supports the EHT-MCS 10 to 11 fields SS value, or the maximum received N that supports the EHT-MCS 12 to 13 fields SS value, any one of them; - When the value of the Rx NSS type is 0, the maximum N supported as indicated by the value of the Rx NSS (BW = 320 MHz) field of the operation mode notification frame or the operation mode notification element SS ; or, the maximum N supported as indicated by the value of the Rx NSS (BW = 320 MHz) field of the EHT operation mode notification frame or the EHT operation mode notification element SS ; or, the maximum N supported as indicated by both the value of the Rx NSS extension field of the EHT OM control subfield and the value of the Rx NSS field of the OM control subfield SS .

[0095] According to the present invention, when the operating channel width of the STA is greater than or equal to 80 MHz, in an EHT PPDU with a BW of 20 MHz, 40 MHz, or 80 MHz, the maximum transmitted N of a given EHT-MCS value SS is equal to the smaller of the following.

[0096] - Among the EHT-MCS mapping (BW ≤ 80 MHz, excluding only STAs with 20 MHz) subfields of the EHT capability element corresponding to a given EHT-MCS value, the maximum transmitted N that supports the EHT-MCS 0 to 9 fields SSThe value of (Tx Max Nss), the maximum transmission N that supports the EHT-MCS 10-11 fields SS The value of, or the maximum transmission N that supports the EHT-MCS 12-13 fields SS Any one of the values; - The maximum N supported, as indicated by the value of the Tx NSS (BW ≤ 80MHz) field of the operation mode notification frame or operation mode notification element SS ; or, the maximum N supported, as indicated by the value of the Tx NSS (BW ≤ 80MHz) field of the EHT operation mode notification frame or EHT operation mode notification element SS ; or, the maximum N supported, as indicated by both the value of the Tx NSTS extension field of the EHT OM control subfield and the value of the Tx NSTS field of the EHT OM control subfield SS .

[0097] According to the present invention, when the operation channel width of the STA is greater than or equal to 160MHz, in an EHT PPDU with a BW of 160MHz, the maximum transmission N for a given EHT-MCS value SS is equal to the smaller of the following.

[0098] - Among the EHT-MCS mapping (BW = 160MHz) subfields of the EHT capability element corresponding to a given EHT-MCS value, the maximum transmission N that supports the EHT-MCS 0-9 fields SS The value of, the maximum transmission N that supports the EHT-MCS 10-11 fields SS The value of, or the maximum transmission N that supports the EHT-MCS 12-13 fields SS Any one of the values; - The maximum N supported, as indicated by the value of the Tx NSS (BW = 160MHz) field of the operation mode notification frame or operation mode notification element SS ; or, the maximum N supported, as indicated by the value of the Tx NSS (BW = 160MHz) field of the EHT operation mode notification frame or EHT operation mode notification element SS; or the maximum supported N indicated by both the value of the Tx NSTS extension field of the EHT OM control subfield and the value of the Tx NSTS field of the OM control subfield SS .

[0099] According to the present invention, when the operating channel width of the STA is equal to 320 MHz, in an EHT PPDU with a BW of 320 MHz, the maximum transmission N of a given EHT-MCS value SS is equal to the smaller of the following.

[0100] - Among the EHT-MCS mapping (BW = 320 MHz) subfields of the EHT capability element corresponding to a given EHT-MCS value, the maximum transmission N that supports the EHT-MCS 0-9 fields SS value, the maximum transmission N that supports the EHT-MCS 10-11 fields SS value, or the maximum transmission N that supports the EHT-MCS 12-13 fields SS value of any one of them; - The maximum supported N indicated by the value of the Tx NSS (BW = 320 MHz) field of the operation mode notification frame or the operation mode notification element SS ; or the maximum supported N indicated by the value of the Tx NSS (BW = 320 MHz) field of the EHT operation mode notification frame or the EHT operation mode notification element SS ; or the maximum supported N indicated by both the value of the Tx NSTS extension field of the EHT OM control subfield and the value of the Tx NSTS field of the OM control subfield SS .

[0101] In an embodiment corresponding to the first embodiment of the present invention, when the frame is an operation mode notification frame or the frame includes an operation mode notification element, the frame includes a channel width subfield, a 160 / 80 + 80BW subfield, and a 320BW subfield, and indicates the operating channel width supported by the STA for reception and transmission.

[0102] - Set the channel width subfield to 2, set the 160 / 80 + 80BW subfield to 0, and set the 320BW subfield to 1 to indicate that the operating channel width supported by the STA for reception and transmission is 320 MHz.

[0103] In an embodiment corresponding to the first embodiment of the present invention, when the frame is an operation mode notification frame or the frame includes an operation mode notification element, the frame includes an Rx NSS (BW≤80 MHz) subfield and an Rx NSS extension (BW≤80 MHz) subfield.

[0104] - When the operating channel width supported by the STA is less than or equal to 80 MHz, the Rx NSS extension (BW≤80 MHz) subfield, together with the Rx NSS (BW≤80 MHz) subfield, indicates the maximum number of spatial streams supported by the STA when receiving an EHT PPDU with a BW less than or equal to the operating channel width supported by the STA.

[0105] - When the operating channel width supported by the STA is greater than 80 MHz, the Rx NSS extension (BW≤80 MHz) subfield, together with the Rx NSS (BW≤80 MHz) subfield, indicates the maximum number of spatial streams supported by the STA when receiving an EHT PPDU with a BW of 20 MHz, 40 MHz, or 80 MHz.

[0106] In an embodiment corresponding to the second embodiment of the present invention, when the frame is an EHT operation mode notification frame or the frame includes an EHT operation mode notification element, the frame includes an Rx NSS (BW≤80 MHz) subfield.

[0107] - When the operating channel width supported by the STA is less than or equal to 80 MHz, the Rx NSS (BW≦80 MHz) subfield indicates the maximum number of spatial streams supported by the STA when receiving an EHT PPDU with a BW less than or equal to the operating channel width supported by the STA.

[0108] - When the operating channel width supported by the STA is greater than 80 MHz, the Rx NSS (BW≦80 MHz) subfield indicates the maximum number of spatial streams supported by the STA when receiving an EHT PPDU with a BW of 20 MHz, 40 MHz, or 80 MHz.

[0109] In embodiments corresponding to the first and second embodiments of the present invention, when the frame is an operation mode notification frame or an EHT operation mode notification frame, or when the frame includes an operation mode notification element or an EHT operation mode notification element, the frame includes an Rx NSS (BW = 160 MHz) subfield and an Rx NSS (BW = 320 BW) subfield.

[0110] - When the operating channel width supported by the STA is greater than 80 MHz, the Rx NSS (BW = 160 MHz) subfield indicates the maximum number of spatial streams supported by the STA when receiving an EHT PPDU with a BW of 160 MHz.

[0111] - When the operating channel width supported by the STA is 320 MHz, the Rx NSS (BW = 320 MHz) subfield indicates the maximum number of spatial streams supported by the STA when receiving an EHT PPDU with a BW of 320 MHz.

[0112] In the embodiments corresponding to the first and second embodiments of the present invention, when the frame is an operation mode notification frame or an EHT operation mode notification frame, or when the frame includes an operation mode notification element or an EHT operation mode notification element, the frame includes a Tx NSS (BW≦80MHz) subfield, a Tx NSS (BW=160MHz) subfield, and a Tx NSS (BW=320BW) subfield.

[0113] - When the operation channel bandwidth supported by the STA is less than or equal to 80MHz, the Tx NSS (BW≦80MHz) subfield indicates the maximum number of spatial streams supported by the STA when transmitting an EHT PPDU with a BW less than or equal to the operation channel bandwidth supported by the STA.

[0114] - When the operation channel bandwidth supported by the STA is greater than 80MHz, the Tx NSS (BW≦80MHz) subfield indicates the maximum number of spatial streams supported by the STA when transmitting an EHT PPDU with a BW of 20MHz, 40MHz, or 80MHz. The Tx NSS (BW=160MHz) subfield indicates the maximum number of spatial streams supported by the STA when transmitting an EHT PPDU with a BW of 160MHz.

[0115] - When the operation channel bandwidth supported by the STA is 320MHz, the Tx NSS (BW=320MHz) subfield indicates the maximum number of spatial streams supported by the STA when transmitting an EHT PPDU with a BW of 320MHz.

[0116] In the embodiments corresponding to the first and second embodiments of the present invention, when the frame is an operation mode notification frame or an EHT operation mode notification frame, or when the frame includes an operation mode notification element or an EHT operation mode notification element, the frame includes a UL MU inactivation subfield and a UL MU data inactivation subfield, and can determine a permitted frame type transmitted as a response to permitted UL MU operations and trigger frames.

[0117] - When both the UL MU inactivation subfield and the UL MU data inactivation subfield are set to 0, the STA enables all trigger-based UL MU transmissions.

[0118] - When the UL MU inactivation subfield is set to 1 and the UL MU data inactivation subfield is set to 0, the STA suspends all trigger-based UL MU transmissions, and the STA stops responding to received trigger frames.

[0119] - When the UL MU inactivation subfield is set to 0 and the UL MU data inactivation subfield is set to 1, the transmission of trigger-based UL MU data frames in response to basic trigger frames can be suspended by the STA, but other trigger-based UL MU transmissions can remain enabled by the STA.

[0120] In the embodiments corresponding to the first and second embodiments of the present invention, when the frame is an operation mode notification frame or an EHT operation mode notification frame, or when the frame includes an operation mode notification element or an EHT operation mode notification element, the frame includes a DL MU-MIMO remeasurement recommendation subfield. Setting the DL MU-MIMO remeasurement recommendation subfield to 1 instructs the STA that the AP recommends remeasuring the channel with the STA or increasing the channel sounding frequency, and setting the DL MU-MIMO remeasurement recommendation subfield to 0 instructs the STA that there is no recommendation regarding the AP channel sounding frequency.

[0121] In the embodiment corresponding to the second option of the third embodiment of the present invention, when the frame includes an EHT OM control subfield and an OM control subfield, if the operating channel width of the STA is 320 MHz, the maximum number of spatial streams supported by the STA is determined by the following formula when receiving an EHT PPDU with a BW of 320 MHz.

Number

[0122] TIFF0007717850000025.tif26170

Number

[0123] TIFF0007717850000027.tif63170

[0124] In the embodiment corresponding to the third option of the third embodiment of the present invention, when the frame includes an EHT OM control subfield and an OM control subfield, if the operating channel width of the STA is 320 MHz, the maximum number of spatial streams supported by the STA is determined by the following formula when receiving an EHT PPDU with a BW of 320 MHz.

Number

[0125] TIFF0007717850000029.tif54170

[0126] In the embodiment corresponding to the third option of the third embodiment of the present invention, when the frame includes an EHT OM control subfield and an OM control subfield, if the operating channel width of the STA is 320 MHz, the maximum number of spatial streams supported by the STA is determined by the following formula when receiving an EHT PPDU with a BW less than or equal to 80 MHz.

Number

[0127] TIFF0007717850000031.tif55170

[0128] In the embodiment corresponding to the first option of the third embodiment of the present invention, when the frame includes an EHT OM control subfield and an OM control subfield, if the operating channel width of the STA is 320 MHz, the maximum number of spatial streams supported by the STA when transmitting an EHT PPDU with a BW of 320 MHz is determined by the following formula.

Number

[0129] TIFF0007717850000033.tif54170

[0130] In the embodiment corresponding to the second option of the third embodiment of the present invention, when the frame includes an EHT OM control subfield and an OM control subfield, if the operating channel width of the STA is 320 MHz, the maximum number of spatial streams supported by the STA when transmitting an EHT PPDU with a BW of 320 MHz is determined by the following formula.

Number

[0131] TIFF0007717850000035.tif24170

Number

[0132] TIFF0007717850000037.tif63170

[0133] In an embodiment corresponding to the third option of the third embodiment of the present invention, when the frame includes an EHT OM control subfield and an OM control subfield, and the operating channel width of the STA is 320 MHz, the following formula is used to determine the maximum number of spatial streams supported by the STA when transmitting an EHT PPDU with a BW of 320 MHz.

Number

[0134] TIFF0007717850000039.tif55170

[0135] In an embodiment corresponding to the third option of the third embodiment of the present invention, when the frame includes an EHT OM control subfield and an OM control subfield, and the operating channel width of the STA is 320 MHz, the following formula is used to determine the maximum number of spatial streams supported by the STA when transmitting an EHT PPDU with a BW less than or equal to 80 MHz.

Number

[0136] TIFF0007717850000041.tif56170

[0137] The commercial benefits of some embodiments are as follows. 1. Solve the problems in the prior art. 2. Efficiently change OM. 3. Provide good communication performance. 4. Provide high reliability. 5. Some embodiments of the present invention are used by chipset suppliers, communication system development suppliers, automobile manufacturers such as passenger cars, trains, trucks, buses, bicycles, motorcycles, helmets, drones (unmanned aerial vehicles), smartphone manufacturers, public security communication devices, and AR / VR device manufacturers (for games, conferences / seminars, educational purposes, etc.).

[0138] FIG. 9 is a block diagram of an exemplary system 700 for wireless communication according to an embodiment of the present invention. The embodiments described herein can be implemented in a system using any suitably configured hardware and / or software. FIG. 9 shows a system 700, which includes a radio frequency (RF) circuit 710, a baseband circuit 720, an application circuit 730, a memory / storage device 740, a display 750, a camera 760, a sensor 770, and an input / output (I / O) interface 780 (coupled to each other at least as shown). The application circuit 730 can include circuits such as one or more single-core or multi-core processors, but is not limited thereto. The processor can include any combination of general-purpose processors and dedicated processors such as a graphics processor and an application processor. The processor can be coupled to the memory / storage and configured to execute instructions stored in the memory / storage so that various applications and / or operating systems can be executed on the system.

[0139] The baseband circuit 720 may include, but is not limited to, circuits such as one or more single-core or multi-core processors. The processor may include a baseband processor. The baseband circuit can process various radio control functions that enable communication with one or more wireless networks via the RF circuit. The radio control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc. In some embodiments, the baseband circuit can provide communication compatible with one or more wireless technologies. For example, in some embodiments, the baseband circuit can support communication with an Evolved Universal Terrestrial Radio Access Network (EUTRAN), and / or other Wireless Metropolitan Area Networks (WMANs), Wireless Local Area Networks (WLANs), Wireless Personal Area Networks (WPANs). In an embodiment, a baseband circuit configured to support wireless communication of one or more types of wireless protocols can be referred to as a multi-mode baseband circuit.

[0140] In various embodiments, baseband circuit 720 may include circuits that operate using signals that are not considered to be at baseband frequencies in a strict sense. For example, in some embodiments, the baseband circuit may include circuits that operate on signals having an intermediate frequency between the baseband frequency and the radio frequency. RF circuit 710 can communicate with a wireless network via a non-solid medium using modulated electromagnetic radiation. In various embodiments, the RF circuit may include switches, filters, amplifiers, etc. to facilitate communication with the wireless network. In various embodiments, RF circuit 710 may include circuits that operate on signals that are not considered to be strictly at radio frequencies. For example, in some embodiments, the RF circuit may include circuits that operate on signals having an intermediate frequency between the baseband frequency and the radio frequency.

[0141] In various embodiments, the transmitter circuit, control circuit, or receiver circuit described above with respect to the AP or STA can be fully or partially embodied in one or more of the RF circuit, baseband circuit, and application circuit. As used herein, "circuit" can refer to an application specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or group), and / or memory (shared, dedicated, or group) for executing one or more software or firmware programs, a combination of logic circuits, and / or other suitable hardware components that provide the described functionality. In some embodiments, the electronic device circuit can be implemented by one or more software or firmware modules, or the functionality related to the circuit can be implemented by one or more software or firmware modules. In some embodiments, some or all of the components of the baseband circuit, application circuit, and / or memory / storage may be implemented together on a system on a chip (SOC). The memory / storage 740 can be used, for example, to load and store data and / or instructions for the system. The memory / storage device in an embodiment can include any combination of suitable volatile memory, such as dynamic random access memory (DRAM), and / or non-volatile memory, such as flash memory, etc.

[0142] In various embodiments, the I / O interface 780 may include one or more user interfaces designed so that a user can interact with the system and / or a peripheral component interface designed so that peripheral components designed so that a user can interact with the system can interact with the system. The user interface may include, but is not limited to, a physical keyboard or keypad, a touchpad, speakers, a microphone, etc. The peripheral component interface may include, but is not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power interface. In various embodiments, the sensor 770 may include one or more sensing devices to determine environmental conditions and / or location information regarding the system. In some embodiments, the sensor may include, but is not limited to, a gyro sensor, an accelerometer, a proximity sensor, an ambient light sensor, and a positioning unit. The positioning unit may be part of a baseband circuit and / or an RF circuit, or may interact with a baseband circuit and / or an RF circuit to communicate with components of a positioning network (e.g., Global Positioning System (GPS) satellites).

[0143] In various embodiments, the display 750 may include a display such as a liquid crystal display and a touch screen display. In various embodiments, the system 700 may be a mobile computing device such as a notebook computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, an AR / VR glasses, etc., but is not limited thereto. In various embodiments, the system may have more or fewer components and / or a different architecture. Where appropriate, the methods described in the present invention may be implemented as a computer program. The computer program may be stored in a storage medium such as a non-transitory storage medium.

[0144] Those skilled in the art should understand that each unit, algorithm, and step described and disclosed in the embodiments of the present invention can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application conditions and design requirements of the technical solution. Those skilled in the art can use different methods to implement the functions of each specific application, and such implementation should not exceed the scope of the present invention. Those skilled in the art should understand that the working processes of the above-mentioned system, device, and unit are substantially the same, and they can refer to the working processes of the system, device, and unit in the above embodiments. For the sake of convenience and brevity of description, the present invention will not describe these working processes in detail again.

[0145] It should be understood that the systems, devices, and units disclosed in the embodiments of the present invention can be implemented using other methods. The above embodiments are only illustrative. The division of units is only based on logical functions, and there are other divisions during implementation. A plurality of units or components can be combined or integrated into another system. Specific functions can also be omitted or skipped. On the other hand, the indicated or described mutual coupling, direct coupling, or communication coupling operates indirectly or communicatively through some ports, devices, or units of electrical, mechanical, or other forms. The units described as individual parts may or may not be physically separated. The units used for display may or may not be physical units, that is, they may be arranged in one position or distributed among multiple network units. According to the purpose of the embodiment, part or all of the units can be used. Also, each functional element in each embodiment may be integrated into one physically independent processing unit or one processing unit having two or more units.

[0146] When a software capability element is implemented and sold as a product, the software capability element can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution proposed in the present invention can be essentially or partially implemented in the form of a software product. Alternatively, some of the technical solutions beneficial to the prior art can be implemented in the form of a software product. The software product in the computer is stored in a storage medium and includes a plurality of commands for causing a computing device (such as a personal computer, a server, or a network device) to execute all or part of the steps disclosed in the embodiments of the present invention. The storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a floppy disk, or other media that can store program code.

[0147] The present invention has been described in connection with what is considered to be the most practical and preferred embodiments, it is to be understood that the present invention is not limited to the disclosed embodiments, but is intended to cover various arrangements made without departing from the broadest scope of the appended claims.

Claims

Claim 1 A wireless communication method, wherein a station (STA) determines operation mode information, the operation mode information including a maximum number of spatial streams (NSS) supported by the STA when transmitting or receiving an extremely high throughput (EHT) physical layer protocol data unit (PPDU), the STA determining the maximum NSS based on an operation channel width of the STA and a bandwidth (BW) of the EHT PPDU, the operation mode information further including the operation channel width, the operation mode information being carried in a high efficiency (HE) variant high throughput (HT) control field of a data frame or a management frame, the HE variant HT control field including an operation mode (OM) control subfield and an EHT OM control subfield, the OM control subfield including an uplink (UL) multi-user (MU) inactivation subfield and a UL MU data inactivation subfield, the UL MU inactivation subfield and the UL MU data inactivation subfield being used to determine a permitted frame type transmitted in response to a permitted UL MU operation and a trigger frame, when both the UL MU inactivation subfield and the UL MU data inactivation subfield are set to a first value, all trigger-based UL MU transmissions are enabled, when the UL MU inactivation subfield is set to a second value and the UL MU data inactivation subfield is set to the first value, all trigger-based UL MU transmissions are suspended and no response is made to a received trigger frame, and when the UL MU inactivation subfield is set to the first value and the UL MU data inactivation subfield is set to the second value, trigger-based UL MU data frame transmission of a basic trigger frame is suspended but other trigger-based UL MU transmissions remain enabled, When the operating channel width of the STA is 320 MHz, according to Equation 1, when receiving an EHT PPDU with a BW of 320 MHz, the maximum number of spatial streams supported by the STA is determined, and according to Equation 2, when receiving an EHT PPDU with a BW smaller than or equal to 80 MHz, the maximum number of spatial streams supported by the STA is determined. 【Number 1】 【Number 2】 【Number 3】 【Number 4】

2. The OM control subfield includes a channel width subfield, the EHT OM control subfield includes a channel width extension subfield, and the channel width extension subfield, together with the channel width subfield, indicates the operating channel width. The wireless communication method according to claim 1.

3. The OM control subfield includes an Rx NSS subfield, the EHT OM control subfield includes an Rx NSS extension subfield, and the Rx NSS extension subfield and the Rx NSS subfield are used to indicate the maximum NSS supported during reception. The wireless communication method according to claim 1.

4. When the operating channel width is equal to a second predetermined BW, the Rx NSS extension subfield, together with the Rx NSS subfield, indicates the maximum NSS supported during reception of an EHT PPDU having a BW smaller than or equal to a first predetermined BW, where the first predetermined BW is smaller than the second predetermined BW. The first predetermined BW is 80 MHz, and the second predetermined BW is 160 MHz. The wireless communication method according to claim 3.

5. When the operating channel width is equal to a second predetermined BW, the maximum NSS supported during reception of an EHT PPDU having the second predetermined BW is determined by the floor function of the product of the Rx NSS value and a ratio. The Rx NSS value is derived from the EHT OM control subfield and the OM control subfield, and the ratio is the ratio of the maximum received NSS among all Rx EHT-MCS values at the second predetermined BW to the maximum received NSS among all Rx EHT-MCS values at a first predetermined BW, where the first predetermined BW is smaller than the second predetermined BW. Based on the EHT capability element, determine the maximum received NSS among all Rx EHT-MCS values in the first predetermined BW and the maximum received NSS among all Rx EHT-MCS values in the second predetermined BW. The first predetermined BW is 80 MHz, and the second predetermined BW is 160 MHz. The wireless communication method according to claim 3.

6. The OM control subfield includes the Tx NSTS subfield, the EHT OM control subfield includes the Tx NSTS extension subfield, and the Tx NSTS extension subfield and the Tx NSTS subfield are used to indicate the maximum number of spatial streams (NSTS) supported during transmission. The wireless communication method according to claim 1.

7. When the operating channel bandwidth is equal to 320 MHz, in an EHT PPDU with a BW of 320 MHz, the maximum received NSS for a given EHT-MCS value is The value of the maximum received NSS for the given EHT-MCS value in the EHT-MCS mapping subfield of the EHT capability element corresponding to the 320 MHz BW, Equal to the smaller of the maximum received NSS indicated by the value of the Rx NSS field of the operation mode notification frame, the maximum received NSS supported by the operation mode notification element, the maximum received NSS supported by the EHT operation mode notification frame or the EHT operation mode notification element, or the maximum received NSS jointly indicated by the value of the Rx NSS extension field of the EHT OM control subfield and the value of the Rx NSS field of the OM control subfield. The wireless communication method according to claim 1.

8. When the operating channel bandwidth is equal to 320 MHz, in an EHT PPDU with a BW of 320 MHz, the maximum transmitted NSS for a given EHT-MCS value is The value of the maximum transmitted NSS for the given EHT-MCS value in the EHT-MCS mapping subfield of the EHT capability element corresponding to the 320 MHz BW. Equal to the smaller of the maximum transmit NSS indicated by the value of the Tx NSS field of the operation mode notification frame, or the maximum transmit NSS indicated by the operation mode notification element, or the maximum transmit NSS indicated by the EHT operation mode notification frame or the EHT operation mode notification element, or the maximum transmit NSS indicated by the values of the Tx NSTS extension field of the EHT OM control subfield and the Tx NSTS field of the OM control subfield. The wireless communication method according to claim 1.

9. When the operation channel width of the STA is 160 MHz, according to Equation 5, when receiving an EHT PPDU with BW of 160 MHz, determine the maximum number of spatial streams supported by the STA. [Number 5] 【Number 6】

10. A wireless communication method, comprising: An access point (AP) determines operation mode information, where the operation mode information includes the maximum number of spatial streams (NSS) supported by the AP when transmitting or receiving an extremely high throughput (EHT) physical layer protocol data unit (PPDU). The AP determines the maximum NSS based on the operation channel width of the AP and the bandwidth (BW) of the EHT PPDU. The operation mode information further includes the operation channel width, and the operation mode information is carried in the high efficiency (HE) variant high throughput (HT) control field of a data frame or a management frame. The HE variant HT control field includes an operation mode (OM) control subfield and an EHT OM control subfield. The OM control subfield includes an uplink (UL) multi-user (MU) inactivation subfield and a UL MU data inactivation subfield. The UL MU inactivation subfield and the UL MU data inactivation subfield are used to determine a permitted frame type transmitted as a response to a permitted UL MU operation and a trigger frame. When both the UL MU inactivation subfield and the UL MU data inactivation subfield are set to a first value, all trigger-based UL MU transmissions are enabled. When the UL MU inactivation subfield is set to a second value and the UL MU data inactivation subfield is set to the first value, all trigger-based UL MU transmissions are suspended and the station does not respond to the received trigger frame. When the UL MU inactivation subfield is set to the first value and the UL MU data inactivation subfield is set to the second value, the trigger-based UL MU data frame transmission of the basic trigger frame is suspended, but other trigger-based UL MU transmissions remain enabled. When the operating channel bandwidth of the AP is 320 MHz, according to Equation 7, when receiving an EHT PPDU with BW = 320 MHz, determine the maximum number of spatial streams supported by the AP. According to Equation 8, when receiving an EHT PPDU with BW less than or equal to 80 MHz, determine the maximum number of spatial streams supported by the AP. 【Number 7】 【Number 8】 【Number 9】 【Number 10】 Claim 11 A station (STA) comprising: a memory; a transceiver; a processor coupled to the memory and the transceiver, wherein the processor executes the method according to any one of claims 1 to 9. Claim 12 An access point (AP) comprising: a memory; a transceiver; a processor coupled to the memory and the transceiver, wherein the processor executes the method according to claim 10.

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