CN117882466A - Method and apparatus for puncturing an A-PPDU application sequence and a preamble in a wireless LAN system - Google Patents

Abstract

The present specification (this disclosure) proposes a method and apparatus for puncturing an a-PPDU application sequence and a preamble in a wireless LAN system. Specifically, the receiving STA receives an a-PPDU from the transmitting STA. The receiving STA decodes the a-PPDU. The a-PPDU includes a first PPDU for a primary 160MHz channel and a second PPDU for a secondary 160MHz channel. The receiving STA is allocated to the secondary 160MHz channel through SST. The first PPDU is transmitted based on a first sequence for 160MHz and a first preamble puncturing pattern for 160 MHz. The second PPDU is transmitted based on a second sequence for 160MHz and a second preamble puncturing pattern for 160 MHz.

Description

Method and apparatus for puncturing an A-PPDU application sequence and a preamble in a wireless LAN system

Technical Field

The present disclosure relates to a method for configuring an a-PPDU in a WLAN system, and more particularly, to a method and apparatus for puncturing an a-PPDU application sequence and a preamble.

Background

Wireless Local Area Networks (WLANs) have been improved in various ways. For example, the IEEE 802.11ax standard proposes an improved communication environment using Orthogonal Frequency Division Multiple Access (OFDMA) and downlink multi-user multiple input multiple output (DL MU MIMO) techniques.

The present specification proposes technical features that can be utilized in a new communication standard. For example, the new communication standard may be the very high throughput (EHT) standard currently in question. The EHT standard may use newly proposed increased bandwidth, enhanced PHY layer protocol data unit (PPDU) structure, enhanced sequences, hybrid automatic repeat request (HARQ) scheme, etc. The EHT standard may be referred to as the IEEE 802.11be standard.

In the new wireless LAN standard, an increased number of spatial streams may be used. In this case, in order to properly use the increased number of spatial streams, it may be necessary to improve signaling techniques in the WLAN system.

Disclosure of Invention

Technical problem

The present specification proposes a method and apparatus for puncturing an a-PPDU application sequence and a preamble in a WLAN system.

Technical proposal

Examples of the present specification propose a method for puncturing an a-PPDU application sequence and a preamble.

The present embodiment may be performed in a network environment supporting a next generation WLAN system (IEEE 802.11be or EHT WLAN system). The next generation wireless LAN system is a WLAN system enhanced from the 802.11ax system, and thus can satisfy backward compatibility with the 802.11ax system.

This embodiment is performed by a receiving Station (STA), and the receiving STA may correspond to a non-access point (non-AP) STA. The transmitting STA may correspond to an AP STA.

This embodiment proposes a method for applying sequence and preamble puncturing such that a receiving STA assigned to a secondary 160MHz channel through SST performs a unified operation in case that a transmitting STA transmits an a-PPDU. The a-PPDU may consist of a combination of the HE PPDU and the EHT PPDU, or may consist of only the EHT PPDU. This has the effect of allowing the receiving STA to perform a unified operation regardless of how the a-PPDUs are combined and transmitted.

A receiving Station (STA) receives an aggregated physical protocol data unit (a-PPDU) from a transmitting STA.

The receiving STA decodes the a-PPDU.

The a-PPDUs include a High Efficiency (HE) PPDU for a primary 160MHz channel and an Extremely High Throughput (EHT) PPDU for a secondary 160MHz channel. The first PPDU may be a High Efficiency (HE) PPDU or a first very high throughput (EHT) PPDU. The second PPDU may be a second EHT PPDU.

The receiving STAs are assigned to the secondary 160MHz channel through a sub-channel selective transmission (SST). That is, this embodiment assumes that SST is applied.

The first PPDU is transmitted based on a first sequence for 160MHz and a first preamble puncturing pattern for 160 MHz. The second PPDU is transmitted based on a second sequence for 160MHz and a second preamble puncturing pattern for 160 MHz.

Advantageous effects

According to the embodiments presented in the present specification, efficient support of the HE STA and the EHT STA is possible by indicating bandwidths of the HE PPDU and the EHT PPDU constituting the a-PPDU. Since the AP allocates the R1 EHT STA only within the primary 160MHz channel, it is not necessary to assign the R1 EHT STA to another channel through SST operation or the like, which may also have an advantage in terms of implementation complexity.

Drawings

Fig. 1 shows an example of a transmitting device and/or a receiving device of the present specification.

Fig. 2 is a conceptual diagram illustrating a structure of a Wireless Local Area Network (WLAN).

Fig. 3 illustrates a general link setup procedure.

Fig. 4 illustrates an example of a PPDU used in the IEEE standard.

Fig. 5 illustrates a layout of Resource Units (RUs) used in a band of 20 MHz.

Fig. 6 illustrates a layout of Resource Units (RUs) used in a frequency band of 40 MHz.

Fig. 7 illustrates a layout of Resource Units (RUs) used in a frequency band of 80 MHz.

Fig. 8 illustrates a structure of the HE-SIG-B field.

Fig. 9 illustrates an example of assigning a plurality of user STAs to the same RU through a MU-MIMO scheme.

Fig. 10 illustrates an example of a PPDU used in the present specification.

Fig. 11 illustrates an example of a transmitting apparatus and/or a receiving apparatus of the modification of the present specification.

Fig. 12 is a diagram of a representative a-PPDU.

Fig. 13 shows a structure of U-SIG.

Fig. 14 is a process flow chart illustrating the operation of the transmitting apparatus according to this embodiment.

Fig. 15 is a process flow chart illustrating the operation of the receiving apparatus according to the present embodiment.

Fig. 16 is a flowchart illustrating a procedure in which a transmitting STA transmits an a-PPDU according to this embodiment.

Fig. 17 is a flowchart illustrating a procedure in which a receiving STA receives an a-PPDU according to this embodiment.

Detailed Description

In this specification, "a or B" may mean "a only", "B only" or "both a and B". In other words, in the present specification, "a or B" may be interpreted as "a and/or B". For example, in this specification, "A, B or C" may mean any combination of "a only", "B only", "C only" or "A, B, C".

Slash (/) or comma as used in this specification may mean "and/or". For example, "A/B" may mean "A and/or B". Thus, "a/B" may mean "a only", "B only" or "both a and B". For example, "A, B, C" may mean "A, B or C".

In the present specification, "at least one of a and B" may mean "a only", "B only", or "both a and B". In addition, in the present specification, the expression "at least one of a or B" or "at least one of a and/or B" may be interpreted as "at least one of a and B".

In addition, in the present specification, "at least one of A, B and C" may mean "a only", "B only", "C only", or "A, B and C in any combination. In addition, "at least one of A, B or C" or "at least one of A, B and/or C" may mean "at least one of A, B and C".

In addition, brackets used in this specification may mean "for example". Specifically, when indicated as "control information (EHT-signal)", it may represent that "EHT-signal" is proposed as an example of "control information". In other words, the "control information" of the present specification is not limited to the "EHT-signal", and the "EHT-signal" may be proposed as an example of the "control information". In addition, when indicated as "control information (i.e., EHT-signal)", it may also mean that "EHT-signal" is proposed as an example of "control information".

The technical features described separately in one drawing of the present specification may be implemented separately or may be implemented simultaneously.

The following examples of the present specification may be applied to various wireless communication systems. For example, the following examples of the present specification may be applied to a Wireless Local Area Network (WLAN) system. For example, the present description may be applied to the IEEE 802.11a/g/n/ac standard or the IEEE 802.11ax standard. In addition, the present specification can also be applied to the newly proposed EHT standard or IEEE 802.11be standard. Furthermore, the examples of the present specification can also be applied to a new WLAN standard enhanced from the EHT standard or the IEEE 802.11be standard. In addition, examples of the present specification may be applied to a mobile communication system. For example, it may be applied to a mobile communication system based on Long Term Evolution (LTE) depending on 3 rd generation partnership project (3 GPP) standards and LTE-based evolution. In addition, examples of the present specification may be applied to a communication system of a 5G NR standard based on a 3GPP standard.

Hereinafter, in order to describe technical features of the present specification, technical features applicable to the present specification will be described.

Fig. 1 shows an example of a transmitting device and/or a receiving device of the present specification.

In the example of fig. 1, various technical features described below may be performed. Fig. 1 relates to at least one Station (STA). For example, STAs 110 and 120 of the present description may also be referred to as various terms such as mobile terminals, wireless devices, wireless transmit/receive units (WTRUs), user Equipment (UE), mobile Stations (MSs), mobile subscriber units, or simply users. STAs 110 and 120 of the present description may also be referred to as various terms such as networks, base stations, node bs, access Points (APs), repeaters, routers, repeaters, and the like. STAs 110 and 120 of the present specification may also be referred to as various names such as a receiving device, a transmitting device, a receiving STA, a transmitting STA, a receiving device, a transmitting device, etc.

For example, STAs 110 and 120 may function as APs or non-APs. That is, STAs 110 and 120 of the present description may function as an AP and/or a non-AP.

In addition to the IEEE 802.11 standard, STAs 110 and 120 of the present specification may together support various communication standards. For example, communication standards based on 3GPP standards (e.g., LTE-A, 5G NR standards) and the like may be supported. In addition, the STA of the present description may be implemented as various devices such as a mobile phone, a vehicle, a personal computer, and the like. In addition, the STA of the present specification may support communication for various communication services such as voice call, video call, data communication, and self-driving (autonomous driving).

STAs 110 and 120 of the present description may include a Medium Access Control (MAC) compliant with the IEEE 802.11 standard and a physical layer interface for a radio medium.

STAs 110 and 120 will be described below with reference to sub-picture (a) of fig. 1.

The first STA110 may include a processor 111, a memory 112, and a transceiver 113. The illustrated processor, memory, and transceiver may be implemented separately as separate chips, or at least two blocks/functions may be implemented by a single chip.

The transceiver 113 of the first STA performs a signal transmission/reception operation. Specifically, IEEE 802.11 packets (e.g., IEEE 802.11a/b/g/n/ac/ax/be, etc.) may be transmitted/received.

For example, the first STA110 may perform operations expected by the AP. For example, the processor 111 of the AP may receive signals through the transceiver 113, process Received (RX) signals, generate Transmit (TX) signals, and provide control over signal transmission. The memory 112 of the AP may store signals (e.g., RX signals) received through the transceiver 113 and may store signals (e.g., TX signals) to be transmitted through the transceiver.

For example, the second STA 120 may perform operations expected by a non-AP STA. For example, the non-AP transceiver 123 performs a signal transmission/reception operation. Specifically, IEEE 802.11 packets (e.g., IEEE 802.11a/b/g/n/ac/ax/be packets, etc.) may be transmitted/received.

For example, the processor 121 of the non-AP STA may receive signals through the transceiver 123, process RX signals, generate TX signals, and provide control over signal transmission. The memory 122 of the non-AP STA may store signals (e.g., RX signals) received through the transceiver 123 and may store signals (e.g., TX signals) to be transmitted through the transceiver.

For example, the operations of the apparatus indicated as an AP in the description described below may be performed in the first STA110 or the second STA 120. For example, if the first STA110 is an AP, the operation of the device indicated as an AP may be controlled by the processor 111 of the first STA110, and the related signals may be transmitted or received through the transceiver 113 controlled by the processor 111 of the first STA 110. In addition, control information related to the operation of the AP or TX/RX signals of the AP may be stored in the memory 112 of the first STA 110. In addition, if the second STA 120 is an AP, the operation of the device indicated as the AP may be controlled by the processor 121 of the second STA 120, and the related signal may be transmitted or received through the transceiver 123 controlled by the processor 121 of the second STA 120. In addition, control information related to the operation of the AP or TX/RX signals of the AP may be stored in the memory 122 of the second STA 120.

For example, in the description described below, the operation of a device indicated as a non-AP (or user STA) may be performed in the first STA110 or the second STA 120. For example, if the second STA120 is non-AP, the operation of the device indicated as non-AP may be controlled by the processor 121 of the second STA120, and the related signal may be transmitted or received through the transceiver 123 controlled by the processor 121 of the second STA 120. In addition, control information related to the operation of the non-AP or the TX/RX signal of the non-AP may be stored in the memory 122 of the second STA 120. For example, if the first STA110 is non-AP, the operation of the device indicated as non-AP may be controlled by the processor 111 of the first STA110, and the related signals may be transmitted or received through the transceiver 113 controlled by the processor 111 of the first STA 110. In addition, control information related to operation of the non-AP or TX/RX signals of the non-AP may be stored in the memory 112 of the first STA 110.

In the description described below, devices called (transmitting/receiving) STA, first STA, second STA, STA1, STA2, AP, first AP, second AP, AP1, AP2, (transmitting/receiving) terminal, (transmitting/receiving) device, (transmitting/receiving) apparatus, network, and the like may refer to STAs 110 and 120 of fig. 1 in an implied manner. For example, devices indicated (but not specifically numbered) (transmitting/receiving) STA, first STA, second STA, STA1, STA2, AP, first AP, second AP, AP1, AP2, (transmitting/receiving) terminal, (transmitting/receiving) device, (transmitting/receiving) apparatus, network, etc. may implicitly refer to STA110 and 120 of fig. 1. For example, in the following examples, operations of various STAs transmitting/receiving signals (e.g., PPDUs) may be performed in the transceivers 113 and 123 of fig. 1. In addition, in the following examples, operations of various STAs generating TX/RX signals or performing data processing and calculation in advance for the TX/RX signals may be performed in the processors 111 and 121 of fig. 1. Examples of operations for generating TX/RX signals or performing data processing and computation in advance may include, for example: 1) Operations of determining/obtaining/configuring/calculating/decoding/encoding bit information of subfields (SIG, STF, LTF, data) included in the PPDU; 2) An operation of determining/configuring/obtaining time resources or frequency resources (e.g., subcarrier resources) for subfields (SIG, STF, LTF, data) included in the PPDU, etc.; 3) An operation of determining/configuring/obtaining a specific sequence (e.g., pilot sequence, STF/LTF sequence, additional sequence applied to SIG) for a subfield (SIG, STF, LTF, data) field included in the PPDU, etc.; 4) Power control operation and/or power save operation applied to the STA; and 5) operations related to determination/acquisition/configuration/decoding/encoding of an ACK signal, and the like. In addition, in the following examples, various information (e.g., information related to fields/subfields/control fields/parameters/power, etc.) used by various STAs to determine/obtain/configure/calculate/decode TX/RX signals may be stored in the memories 112 and 122 of fig. 1.

The foregoing apparatus/STA of sub-graph (a) of fig. 1 may be modified as shown in sub-graph (b) of fig. 1. Hereinafter, STA 110 and STA120 of the present specification will be described based on sub-diagram (b) of fig. 1.

For example, transceivers 113 and 123 shown in sub-graph (b) of fig. 1 may perform the same functions as the aforementioned transceivers shown in sub-graph (a) of fig. 1. For example, the processing chips 114 and 124 shown in sub-graph (b) of fig. 1 may include processors 111 and 121 and memories 112 and 122. The processors 111 and 121 and memories 112 and 122 shown in sub-graph (b) of fig. 1 may perform the same functions as the aforementioned processors 111 and 121 and memories 112 and 122 shown in sub-graph (a) of fig. 1.

A mobile terminal, a wireless device, a wireless transmit/receive unit (WTRU), a User Equipment (UE), a Mobile Station (MS), a mobile subscriber unit, a user STA, a network, a base station, a node B, an Access Point (AP), a repeater, a router, a repeater, a receive unit, a transmit unit, a receive STA, a transmit STA, a receive device, a transmit device, a receive device, and/or a transmit device described below may mean STAs 110 and 120 shown in sub-graph (a)/(B) of fig. 1, or may mean processing chips 114 and 124 shown in sub-graph (B) of fig. 1. That is, technical features of the present specification may be performed in STAs 110 and 120 shown in sub-graph (a)/(b) of fig. 1, or transceivers 113 and 123 shown in sub-graph (a)/(b) of fig. 1 may be performed only in processing chips 114 and 124 shown in sub-graph (b) of fig. 1. For example, the technical feature of the transmitting STA transmitting the control signal may be understood as the technical feature of transmitting the control signal generated in the processors 111 and 121 illustrated in the sub-diagram (a)/(b) of fig. 1 through the transceiver 113 illustrated in the sub-diagram (a)/(b) of fig. 1. Alternatively, the technical feature of the transmitting STA transmitting the control signal may be understood as the technical feature of generating the control signal to be transmitted to the transceivers 113 and 123 in the processing chips 114 and 124 shown in the sub-graph (b) of fig. 1.

For example, the technical feature of the receiving STA receiving the control signal may be understood as the technical feature of receiving the control signal through the transceivers 113 and 123 shown in the sub-graph (a) of fig. 1. Alternatively, the technical features of the receiving STA to receive the control signal may be understood as the technical features of obtaining the control signal received in the transceivers 113 and 123 shown in the sub-graph (a) of fig. 1 through the processors 111 and 121 shown in the sub-graph (a) of fig. 1. Alternatively, the technical features of the receiving STA to receive the control signal may be understood as the technical features of the receiving STA to obtain the control signals received in the transceivers 113 and 123 shown in the sub-graph (b) of fig. 1 through the processing chips 114 and 124 shown in the sub-graph (b) of fig. 1.

Referring to sub-graph (b) of fig. 1, software codes 115 and 125 may be included in memories 112 and 122. The software codes 115 and 125 may include instructions for controlling the operation of the processors 111 and 121. Software codes 115 and 125 may be included as various programming languages.

The processors 111 and 121 or the processing chips 114 and 124 of FIG. 1 may include application specific integrated circuits @ASIC), other chipsets, logic circuits, and/or data processing devices. The processor may be an Application Processor (AP). For example, processors 111 and 121 or processing chips 114 and 124 of FIG. 1 may include at least one of the following: a Digital Signal Processor (DSP), a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), and a modulator and demodulator (modem). For example, processors 111 and 121 or processing chips 114 and 124 of FIG. 1 may be implemented by Manufactured SNAPDRAGONTM series processor, consisting ofEXYNOSTM series processor manufactured by ∈>Manufactured A series processor, consists of +.>HELIOTM series processor manufactured by ∈A>The ATOMTM family of processors manufactured or processors enhanced from these processors.

In the present specification, the uplink may mean a link for communication from a non-AP STA to an SP STA, and an uplink PPDU/packet/signal or the like may be transmitted through the uplink. In addition, in the present specification, the downlink may mean a link for communication from an AP STA to a non-AP STA, and a downlink PPDU/packet/signal or the like may be transmitted through the downlink.

Fig. 2 is a conceptual diagram illustrating a structure of a Wireless Local Area Network (WLAN).

The upper part of fig. 2 illustrates the structure of an infrastructure Basic Service Set (BSS) of Institute of Electrical and Electronics Engineers (IEEE) 802.11.

Referring to the upper part of fig. 2, the wireless LAN system may include one or more infrastructure BSSs 200 and 205 (hereinafter, referred to as BSSs). BSSs 200 and 205, which are sets of an AP and an STA (e.g., an Access Point (AP) 225 and a station (STA 1) 200-1) that are successfully synchronized to communicate with each other, are not concepts indicating a specific area. BSS205 may include one or more STAs 205-1 and 205-2 that may join an AP 230.

The BSS may include at least one STA, an AP providing a distributed service, and a Distributed System (DS) 210 connecting the plurality of APs.

The distributed system 210 may implement an Extended Service Set (ESS) 240 extended by connecting the plurality of BSSs 200 and 205. ESS240 may be used as a term indicating a network configured by connecting one or more APs 225 or 230 via distributed system 210. The APs included in one ESS240 may have the same Service Set Identification (SSID).

Portal 220 may serve as a bridge connecting a wireless LAN network (IEEE 802.11) and another network (e.g., 802. X).

In the BSS shown in the upper part of fig. 2, a network between the APs 225 and 230 and the STAs 200-1, 205-1, and 205-2 may be implemented. However, the network is configured to perform communication between STAs even without the APs 225 and 230. A network that performs communication by configuring a network between STAs even without the APs 225 and 230 is defined as an ad hoc network or an Independent Basic Service Set (IBSS).

The lower part of fig. 2 illustrates a conceptual diagram illustrating an IBSS.

Referring to the lower part of fig. 2, the IBSS is a BSS operating in an ad hoc mode. Since the IBSS does not include an Access Point (AP), a centralized management entity performing management functions at the center does not exist. That is, in an IBSS, the STAs 250-1, 250-2, 250-3, 255-4, and 255-5 are managed in a distributed manner. In an IBSS, all STAs 250-1, 250-2, 250-3, 255-4, and 255-5 may be comprised of removable STAs and are not allowed to access the DS to form a self-contained network.

Fig. 3 illustrates a general link establishment procedure.

In S310, the STA may perform a network discovery operation. The network discovery operation may include a scanning operation of the STA. That is, in order to access the network, the STA needs to discover the participating network. The STA needs to identify a compatible network before joining a wireless network, and the process of identifying a network existing in a specific area is called scanning. The scanning method comprises active scanning and passive scanning.

Fig. 3 illustrates a network discovery operation including an active scanning process. In the active scanning, the STA performing the scanning transmits a probe request frame and waits for a response to the probe request frame in order to identify which AP exists around while moving to a channel. The responder transmits a probe response frame to the STA that has transmitted the probe request frame as a response to the probe request frame. Here, the responder may be an STA transmitting the last beacon frame in the BSS of the channel being scanned. In the BSS, the AP is a responder since the AP transmits a beacon frame. In IBSS, the responders are not stationary because STAs in the IBSS send beacon frames in turn. For example, when the STA transmits a probe request frame via channel 1 and receives a probe response frame via channel 1, the STA may store BSS-related information included in the received probe response frame, may move to the next channel (e.g., channel 2), and may perform scanning by the same method (e.g., transmit a probe request and receive a probe response via channel 2).

Although not shown in fig. 3, scanning may be performed by a passive scanning method. In passive scanning, a STA performing scanning may wait for a beacon frame while moving to a channel. The beacon frame is one of management frames in IEEE 802.11, and is periodically transmitted to indicate the presence of a wireless network and enable STAs performing scanning to find and join the wireless network. In a BSS, an AP is configured to periodically transmit a beacon frame. In an IBSS, STAs in the IBSS transmit beacon frames in turn. Upon receiving the beacon frame, the STA performing scanning stores information about BSSs included in the beacon frame and records beacon frame information in respective channels while moving to another channel. The STA that receives the beacon frame may store BSS-related information included in the received beacon frame, may move to the next channel, and may perform scanning in the next channel by the same method.

After discovering the network, the STA may perform authentication processing in S320. This authentication process may be referred to as a first authentication process to be clearly distinguished from the security establishment operation in S340 that follows. The authentication process in S320 may include a process in which the STA transmits an authentication request frame to the AP and the AP transmits an authentication response frame to the STA in response. The authentication frame for authentication request/response is a management frame.

The authentication frame may include information about an authentication algorithm number, an authentication transaction sequence number, a status code, challenge text, a Robust Secure Network (RSN), and a limited loop group.

The STA may transmit an authentication request frame to the AP. The AP may determine whether to allow authentication of the STA based on information included in the received authentication request frame. The AP may provide the authentication processing result to the STA via an authentication response frame.

When the STA is successfully authenticated, the STA may perform association processing in S330. The association processing includes processing in which the STA transmits an association request frame to the AP and the AP transmits an association response frame to the STA in response. For example, the association request frame may include information about various capabilities, beacon listening intervals, service Set Identifiers (SSID), supported rates, supported channels, RSNs, mobile domains, supported operation categories, traffic Indication Map (TIM) broadcast requests, and interworking service capabilities. For example, the association response frame may include information about various capabilities, status codes, association IDs (AID), supported rates, enhanced Distributed Channel Access (EDCA) parameter sets, received Channel Power Indicator (RCPI), received signal-to-noise indicator (RSNI), mobility domain, time out interval (association recovery time), overlapping BSS scan parameters, TIM broadcast response, and QoS map.

In S340, the STA may perform security establishment processing. The security establishment process in S340 may include a process of establishing a private key through a four-way handshake (e.g., through an Extensible Authentication Protocol (EAPOL) frame via a LAN).

Fig. 4 illustrates an example of a PPDU used in the IEEE standard.

As shown, various types of PHY Protocol Data Units (PPDUs) are used in the IEEE a/g/n/ac standard. Ext> specificallyext>,ext> theext> LTFext> andext> theext> STFext> includeext> trainingext> signalsext>,ext> SIGext> -ext> aext> andext> SIGext> -ext> bext> includeext> controlext> informationext> forext> aext> receivingext> staext>,ext> andext> aext> dataext> fieldext> includesext> userext> dataext> correspondingext> toext> aext> psduext> (ext> macext> pduext> /ext> aggregateext> macext> pduext>)ext>.ext>

Fig. 4 also includes an example of a HE PPDU according to IEEE 802.11 ax. The HE PPDU according to fig. 4 is an exemplary PPDU for a plurality of users. HE-SIG-B may be included only in PPDUs for multiple users, and HE-SIG-B may be omitted in PPDUs for a single user.

As illustrated in fig. 4, the HE-PPDU for a plurality of users (MUs) may include a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal (L-SIG), a high efficiency signal a (HE-SIG a), a high efficiency signal B (HE-SIG B), a high efficiency short training field (HE-STF), a high efficiency long training field (HE-LTF), a data field (alternatively, a MAC payload), and a Packet Extension (PE) field. The various fields may be transmitted within the time period shown (i.e., 4 or 8 mus).

Hereinafter, a Resource Unit (RU) for PPDU is described. An RU may include a plurality of subcarriers (or tones). The RU may be used to transmit signals to a plurality of STAs according to OFDMA. In addition, an RU may also be defined to transmit a signal to one STA. RU may be used for STF, LTF, data fields, etc.

Fig. 5 illustrates a layout of Resource Units (RUs) used in a band of 20 MHz.

As illustrated in fig. 5, resource Units (RUs) corresponding to different numbers of tones (i.e., subcarriers) may be used to form some fields of the HE-PPDU. For example, resources may be allocated for HE-STF, HE-LTF, and data fields in the illustrated RUs.

As illustrated in the uppermost part of fig. 5, 26 units (i.e., units corresponding to 26 tones) may be arranged. Six tones may be used for guard bands in the leftmost band of the 20MHz band, and five tones may be used for guard bands in the rightmost band of the 20MHz band. Further, seven DC tones may be inserted in the center frequency band (i.e., DC frequency band), and 26 units corresponding to 13 tones on each of the left and right sides of the DC frequency band may be arranged. Other frequency bands may be allocated 26, 52, and 106 units. The receiving STA (i.e., user) may be assigned various units.

The layout of the RU in fig. 5 may be used not only for Multiple Users (MUs) but also for a Single User (SU), in which case one 242 unit may be used and three DC tones may be inserted, as shown in the lowermost part of fig. 5.

Although fig. 5 proposes RUs having various sizes, i.e., 26-RU, 52-RU, 106-RU, and 242-RU, RU of a specific size may be expanded or added. Therefore, the present embodiment is not limited to each RU of a specific size (i.e., the number of corresponding tones).

Fig. 6 illustrates a layout of Resource Units (RUs) used in a frequency band of 40 MHz.

Similar to fig. 5 using RUs of various sizes, 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, etc. may be used in the example of fig. 6. Further, five DC tones may be inserted in the center frequency, 12 tones may be used for guard bands in the leftmost band of the 40MHz band, and 11 tones may be used for guard bands in the rightmost band of the 40MHz band.

As shown in fig. 6, 484-RU may be used when the layout of RU is for a single user. The specific number of RUs may vary similarly to fig. 5.

Fig. 7 illustrates a layout of Resource Units (RUs) used in a frequency band of 80 MHz.

Similar to fig. 5 and 6 using RUs of various sizes, 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, 996-RU, etc. may be used in the example of fig. 7. Further, seven DC tones may be inserted in the center frequency, 12 tones may be used for guard bands in the leftmost band of the 80MHz band, and 11 tones may be used for guard bands in the rightmost band of the 80MHz band. In addition, 26-RUs corresponding to 13 tones on each of the left and right sides of the DC band may be used.

As shown in fig. 7, a 996-RU may be used when the layout of the RU is for a single user, in which case five DC tones may be inserted.

RU described in this specification may be used in Uplink (UL) communication and Downlink (DL) communication. For example, when performing UL-MU communication requested by a trigger frame, a transmitting STA (e.g., AP) may allocate a first RU (e.g., 26/52/106/242-RU, etc.) to a first STA through the trigger frame and may allocate a second RU (e.g., 26/52/106/242-RU, etc.) to a second STA. Thereafter, the first STA may transmit a first trigger-based PPDU based on the first RU, and the second STA may transmit a second trigger-based PPDU based on the second RU. The first/second trigger-based PPDUs are transmitted to the AP at the same (or overlapping) time periods.

For example, when configuring a DL MU PPDU, a transmitting STA (e.g., AP) may allocate a first RU (e.g., 26/52/106/242-RU, etc.) to a first STA and may allocate a second RU (e.g., 26/52/106/242-RU, etc.) to a second STA. That is, a transmitting STA (e.g., AP) may transmit HE-STF, HE-LTF, and data fields for a first STA through a first RU in one MU PPDU, and may transmit HE-STF, HE-LTF, and data fields for a second STA through a second RU.

Information about the layout of the RU may be signaled through the HE-SIG-B.

Fig. 8 illustrates a structure of the HE-SIG-B field.

As shown, the HE-SIG-B field 810 includes a public field 820 and a user-specific field 830. The common field 820 may include information commonly applied to all users (i.e., user STAs) receiving SIG-B. The user-specific field 830 may be referred to as a user-specific control field. When SIG-B is transmitted to multiple users, the user-specific field 830 may be applied to only any one of the multiple users.

As shown in fig. 8, the common field 820 and the user-specific field 830 may be encoded separately.

The common field 820 may include RU allocation information of N x 8 bits. For example, RU allocation information may include information regarding the location of an RU. For example, when a 20MHz channel is used as shown in fig. 5, RU allocation information may include information about a specific frequency band in which a specific RU (26-RU/52-RU/106-RU) is arranged.

An example of the case where RU allocation information consists of 8 bits is as follows.

TABLE 1

As shown in the example of fig. 5, up to nine 26-RUs may be allocated to a 20MHz channel. When RU allocation information of the common field 820 is set to "00000000" as shown in table 1, nine 26-RUs may be allocated to a corresponding channel (i.e., 20 MHz). In addition, when RU allocation information of the common field 820 is set to "00000001" as shown in table 1, seven 26-RUs and one 52-RU are arranged in the corresponding channel. That is, in the example of FIG. 5, 52-RUs may be allocated to the far right side and seven 26-RUs may be allocated to the left side thereof.

The example of table 1 shows only some RU locations where RU allocation information can be displayed.

For example, RU allocation information may include the following examples of table 2.

TABLE 2

"01000y2y1y0" refers to an example in which 106-RUs are allocated to the leftmost side of a 20MHz channel, and five 26-RUs are allocated to the right side thereof. In this case, a plurality of STAs (e.g., user STAs) may be allocated to the 106-RU based on the MU-MIMO scheme. Specifically, up to 8 STAs (e.g., user STAs) may be allocated to the 106-RU, and the number of STAs (e.g., user STAs) allocated to the 106-RU is determined based on the 3-bit information (y 2y1y 0). For example, when 3-bit information (y 2y1y 0) is set to N, the number of STAs (e.g., user STAs) allocated to 106-RU based on the MU-MIMO scheme may be n+1.

In general, a plurality of STAs (e.g., user STAs) different from each other may be allocated to a plurality of RUs. However, a plurality of STAs (e.g., user STAs) may be allocated to one or more RUs having at least a specific size (e.g., 106 subcarriers) based on the MU-MIMO scheme.

As shown in fig. 8, the user-specific field 830 may include a plurality of user fields. As described above, the number of STAs (e.g., user STAs) allocated to a specific channel may be determined based on RU allocation information of the common field 820. For example, when RU allocation information of the common field 820 is "00000000", one user STA may be allocated to each of nine 26-RUs (e.g., nine user STAs may be allocated). That is, up to 9 user STAs may be allocated to a specific channel through the OFDMA scheme. In other words, up to 9 user STAs may be allocated to a specific channel through a non-MU-MIMO scheme.

For example, when RU allocation is set to "01000y2y1y0", a plurality of STAs may be allocated to 106-RU disposed at the leftmost side through the MU-MIMO scheme, and five user STAs may be allocated to five 26-RU disposed at the right side thereof through the non-MU MIMO scheme. This is illustrated by the example of fig. 9.

Fig. 9 illustrates an example of assigning a plurality of user STAs to the same RU through a MU-MIMO scheme.

For example, when RU allocation is set to "01000010" as shown in fig. 9, 106-RUs may be allocated to the leftmost side of a specific channel, and five 26-RUs may be allocated to the right side thereof. In addition, three user STAs may be allocated to the 106-RU through the MU-MIMO scheme. As a result, since eight user STAs are allocated, the user-specific field 830 of the HE-SIG-B may include eight user fields.

The eight user fields may be represented in the order shown in fig. 9. In addition, as shown in fig. 8, two user fields may be implemented using one user block field.

The user fields shown in fig. 8 and 9 may be configured based on two formats. That is, user fields related to MU-MIMO schemes may be configured in a first format and user fields related to non-MIMO schemes may be configured in a second format. Referring to the example of fig. 9, user fields 1 through 3 may be based on a first format, and user fields 4 through 8 may be based on a second format. The first format or the second format may include bit information of the same length (e.g., 21 bits).

Each user field may have the same size (e.g., 21 bits). For example, the user field of the first format (first MU-MIMO scheme) may be configured as follows.

For example, the first bit (i.e., B0-B10) in the user field (i.e., 21 bits) may include identification information (e.g., STA-ID, partial AID, etc.) of the user STA allocated the corresponding user field. In addition, the second bit (i.e., B11-B14) in the user field (i.e., 21 bits) may include information related to spatial configuration.

In addition, the third bit (i.e., B15-18) in the user field (i.e., 21 bits) may include Modulation and Coding Scheme (MCS) information. The MCS information may be applied to a data field in a PPDU including the corresponding SIG-B.

MCS, MCS information, MCS index, MCS field, etc. used in the present specification may be indicated by an index value. For example, MCS information may be indicated by index 0 to index 11. The MCS information may include information about constellation modulation types (e.g., BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM, 1024-QAM, etc.) and information about coding rates (e.g., 1/2, 2/3, 3/4, 5/6e, etc.). Information about a channel coding type (e.g., LCC or LDPC) may not be included in the MCS information.

In addition, the fourth bit (i.e., B19) in the user field (i.e., 21 bits) may be a reserved field.

In addition, the fifth bit (i.e., B20) in the user field (i.e., 21 bits) may include information about the coding type (e.g., BCC or LDPC). That is, the fifth bit (i.e., B20) may include information about a channel coding type (e.g., BCC or LDPC) applied to a data field in a PPDU including the corresponding SIG-B.

The above examples relate to the user field of the first format (format of MU-MIMO scheme). Examples of the user field of the second format (a format other than MU-MIMO scheme) are as follows.

The first bit (e.g., B0-B10) in the user field of the second format may include identification information of the user STA. In addition, a second bit (e.g., B11-B13) in the user field of the second format may include information about the number of spatial streams applied to the corresponding RU. In addition, a third bit (e.g., B14) in the user field of the second format may include information regarding whether to apply beamforming steering matrices. The fourth bit (e.g., B15-B18) in the user field of the second format may include Modulation and Coding Scheme (MCS) information. In addition, a fifth bit (e.g., B19) in the user field of the second format may include information about whether Dual Carrier Modulation (DCM) is applied. In addition, the sixth bit (i.e., B20) in the user field of the second format may include information about the coding type (e.g., BCC or LDPC).

Hereinafter, PPDUs transmitted/received in STAs of the present specification will be described.

Fig. 10 illustrates an example of a PPDU used in the present specification.

The PPDU of fig. 10 may be referred to by various terms such as an EHT PPDU, a TX PPDU, an RX PPDU, a first type or an nth type PPDU, etc. For example, in the present specification, a PPDU or an EHT PPDU may be referred to by various terms such as TX PPDU, RX PPDU, first type or nth type PPDU, and the like. In addition, the EHT PPDU may be used in an EHT system and/or a new WLAN system enhanced from the EHT system.

The PPDU of fig. 10 may indicate all or part of a PPDU type used in the EHT system. For example, the example of fig. 10 may be used for both Single User (SU) and multi-user (MU) modes. In other words, the PPDU of fig. 10 may be a PPDU for one receiving STA or a plurality of receiving STAs. When the PPDU of fig. 10 is used in a Trigger (TB) -based mode, the EHT-SIG of fig. 10 may be omitted. In other words, an STA that has received a trigger frame for an uplink MU (UL-MU) may transmit a PPDU omitting the EHT-SIG in the example of fig. 10.

In fig. 10, L-STF to EHT-LTF may be referred to as a preamble or a physical preamble, and may be generated/transmitted/received/obtained/decoded in a physical layer.

The subcarrier spacing of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields of FIG. 10 may be determined to be 312.5kHz, and the subcarrier spacing of the EHT-STF, EHT-LTF, and data fields may be determined to be 78.125kHz. That is, the tone index (or subcarrier index) of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, EHT-SIG fields can be expressed in units of 312.5kHz, and the tone index (or subcarrier index) of the EHT-STF, EHT-LTF, and data fields can be expressed in units of 78.125kHz.

In the PPDU of fig. 10, the L-LTF and the L-STF may be the same as those in the conventional field.

The L-SIG field of fig. 10 may include bit information of, for example, 24 bits. For example, the 24-bit information may include a rate field of 4 bits, a reserved bit of 1 bit, a length field of 12 bits, a parity bit of 1 bit, and a tail bit of 6 bits. For example, a length field of 12 bits may include information related to the length or duration of the PPDU. For example, a length field of 12 bits may be determined based on the type of PPDU. For example, when the PPDU is a non-HT, VHT PPDU or EHT PPDU, the value of the length field may be determined as a multiple of 3. For example, when the PPDU is a HE PPDU, the length field may be determined as "multiple of 3" +1 or "multiple of 3" +2. In other words, for a non-HT, VHT PPDU or EHT PPDU, the value of the length field may be determined as a multiple of 3, and for an HE PPDU, the value of the length field may be determined as "multiple of 3" +1 or "multiple of 3" +2.

For example, the transmitting STA may apply BCC encoding based on a 1/2 encoding rate to 24 bits of information of the L-SIG field. Thereafter, the transmitting STA may obtain 48 bits of BCC encoded bits. BPSK modulation may be applied to the 48-bit coded bits, thereby generating 48 BPSK symbols. The transmitting STA may map 48 BPSK symbols to positions other than pilot subcarriers { subcarrier index-21, -7, +7, +21} and DC subcarrier { subcarrier index 0 }. As a result, 48 BPSK symbols can be mapped to subcarrier indexes-26 to-22, -20 to-8, -6 to-1, +1 to +6, +8 to +20, and +22 to +26. The transmitting STA may additionally map signals of { -1, -1,1} to subcarrier indexes { -28, -27, +27, +28}. The aforementioned signals may be used for channel estimation in the frequency domain corresponding to { -28, -27, +27, +28}.

The transmitting STA may generate a RL-SIG generated in the same manner as the L-SIG. BPSK modulation may be applied to the RL-SIG. Based on the presence of the RL-SIG, the receiving STA may know that the RX PPDU is a HE PPDU or an EHT PPDU.

A common SIG (U-SIG) may be inserted after the RL-SIG of fig. 10. The U-SIG can be referred to in various terms such as a first SIG field, a first SIG, a first-type SIG, a control signal field, a first (type) control signal, and so forth.

The U-SIG may include N bits of information and may include information for identifying the type of the EHT PPDU. For example, the U-SIG may be configured based on two symbols (e.g., two consecutive OFDM symbols). Each symbol (e.g., OFDM symbol) for the U-SIG may have a duration of 4 μs. Each symbol of the U-SIG may be used to transmit 26 bits of information. For example, each symbol of the U-SIG may be transmitted/received based on 52 data tones and 4 pilot tones.

With the U-SIG (or U-SIG field), for example, a-bit information (e.g., 52 uncoded bits) may be transmitted. The first symbol of the U-SIG may transmit the first X bits of information (e.g., 26 uncoded bits) of the a-bit information, and the second symbol of the U-SIG may transmit the remaining Y bits of information (e.g., 26 uncoded bits) of the a-bit information. For example, the transmitting STA may obtain 26 uncoded bits included in each U-SIG symbol. The transmitting STA may perform convolutional encoding (i.e., BCC encoding) based on a rate of r=1/2 to generate 52 encoded bits, and may perform interleaving on the 52 encoded bits. The transmitting STA may perform BPSK modulation on the interleaved 52 coded bits to generate 52 BPSK symbols to be allocated to each U-SIG symbol. In addition to DC index 0, one U-SIG symbol may be transmitted based on 65 tones (subcarriers) from subcarrier index-28 to subcarrier index +28. The 52 BPSK symbols generated by the transmitting STA may be transmitted based on the remaining tones (subcarriers) other than the pilot tones, i.e., tones-21, -7, +7, +21.

For example, the a-bit information (e.g., 52 uncoded bits) generated by the U-SIG may include a CRC field (e.g., a field of length 4 bits) and a tail field (e.g., a field of length 6 bits). The CRC field and the tail field may be transmitted over a second symbol of a U-SIG. The CRC field may be generated based on 26 bits of the first symbol allocated to the U-SIG and the remaining 16 bits of the second symbol other than the CRC/tail field, and may be generated based on a conventional CRC calculation algorithm. In addition, the tail field may be used to terminate a trellis (trellis) of the convolutional decoder, and may be set to, for example, "000000".

The a-bit information (e.g., 52 uncoded bits) transmitted by the U-SIG (or U-SIG field) may be divided into version-independent bits and version-dependent bits. For example, the version independent bits may have a fixed or variable size. For example, version-independent bits may be allocated to only the first symbol of the U-SIG, or version-independent bits may be allocated to both the first symbol and the second symbol of the U-SIG. For example, version independent bits and version dependent bits can be referred to in various terms such as first control bits, second control bits, and the like.

For example, the version independent bits of the U-SIG may include a 3-bit PHY version identifier. For example, the 3-bit PHY version identifier may include information related to the PHY version of the TX/RX PPDU. For example, a first value of a 3-bit PHY version identifier may indicate that the TX/RX PPDU is an EHT PPDU. In other words, when the transmitting STA transmits the EHT PPDU, the PHY version identifier of 3 bits may be set to the first value. In other words, the receiving STA may determine that the RX PPDU is an EHT PPDU based on the PHY version identifier having the first value.

For example, the version independent bits of the U-SIG may include a 1-bit UL/DL flag field. A first value of the UL/DL flag field of 1 bit is associated with UL communication and a second value of the UL/DL flag field is associated with DL communication.

For example, the version independent bits of the U-SIG may include information related to the TXOP length and information related to the BSS color ID.

For example, when the EHT PPDU is divided into various types (e.g., various types such as an EHT PPDU related to SU mode, an EHT PPDU related to MU mode, an EHT PPDU related to TB mode, an EHT PPDU related to extended range transmission, etc.), information related to the type of the EHT PPDU may be included in version-related bits of the U-SIG.

For example, the U-SIG may comprise: 1) A bandwidth field including information related to a bandwidth; 2) A field including information related to an MCS scheme applied to the EHT-SIG; 3) An indication field including information regarding whether a dual subcarrier modulation (DCM) scheme is applied to the EHT-SIG; 4) A field including information related to a number of symbols for the EHT-SIG; 5) A field including information related to whether to generate an EHT-SIG across a full frequency band; 6) A field including information related to a type of EHT-LTF/STF; and 7) information related to fields indicating the EHT-LTF length and the CP length.

Preamble puncturing may be applied to the PPDU of fig. 10. Preamble puncturing means that puncturing is applied to a portion of the full band (e.g., the secondary 20MHz band). For example, when transmitting an 80MHz PPDU, the STA may apply puncturing to a secondary 20MHz band among 80MHz bands, and may transmit the PPDU only through the primary 20MHz band and the secondary 40MHz band.

For example, a preamble puncturing pattern may be preconfigured. For example, when the first puncturing pattern is applied, puncturing may be applied only to the secondary 20MHz band within the 80MHz band. For example, when the second puncturing pattern is applied, puncturing may be applied only to any one of two secondary 20MHz bands among the secondary 40MHz bands included in the 80MHz band. For example, when the third puncturing pattern is applied, puncturing may be applied only to the secondary 20MHz band included in the primary 80MHz band within the 160MHz band (or 80+80MHz band). For example, when the fourth puncturing pattern is applied, puncturing may be applied to at least one 20MHz channel not belonging to the main 40MHz band in the presence of the main 40MHz band included in the 80MHz band (or 80+80MHz band).

Information related to preamble puncturing applied to the PPDU may be included in the U-SIG and/or the EHT-SIG. For example, a first field of the U-SIG may include information related to a contiguous bandwidth, and a second field of the U-SIG may include information related to preamble puncturing applied to the PPDU.

For example, the U-SIG and the EHT-SIG may include information related to preamble puncturing based on the following method. When the bandwidth of the PPDU exceeds 80MHz, the U-SIG can be individually configured in units of 80 MHz. For example, when the bandwidth of the PPDU is 160MHz, the PPDU may include a first U-SIG for a first 80MHz band and a second U-SIG for a second 80MHz band. In this case, the first field of the first U-SIG may include information related to a 160MHz bandwidth, and the second field of the first U-SIG may include information related to preamble puncturing applied to the first 80MHz band (i.e., information related to a preamble puncturing pattern). In addition, the first field of the second U-SIG may include information related to a 160MHz bandwidth, and the second field of the second U-SIG may include information related to preamble puncturing applied to the second 80MHz band (i.e., information related to a preamble puncturing pattern). Meanwhile, the EHT-SIG consecutive to the first U-SIG may include information related to preamble puncturing applied to the second 80MHz band (i.e., information related to a preamble puncturing pattern), and the EHT-SIG consecutive to the second U-SIG may include information related to preamble puncturing applied to the first 80MHz band (i.e., information related to a preamble puncturing pattern).

Additionally or alternatively, the U-SIG and EHT-SIG may include information related to preamble puncturing based on the following method. The U-SIG may include information related to preamble puncturing for all frequency bands (i.e., information related to preamble puncturing patterns). That is, the EHT-SIG may not include information related to preamble puncturing, but only the U-SIG may include information related to preamble puncturing (i.e., information related to preamble puncturing patterns).

The U-SIG may be configured in units of 20 MHz. For example, when an 80MHz PPDU is configured, the U-SIG may be duplicated. That is, four identical U-SIGs may be included in an 80MHz PPDU. PPDUs exceeding the 80MHz bandwidth may include different U-SIG.

The EHT-SIG in fig. 10 may include control information for the receiving STA. The EHT-SIG may be transmitted by at least one symbol, and one symbol may have a length of 4 μs. Information related to the number of symbols for the EHT-SIG may be included in the U-SIG.

The EHT-SIG may include the technical features of the HE-SIG-B described with reference to FIGS. 8 and 9. For example, the EHT-SIG may include common fields and user-specific fields as in the example of FIG. 8. The common field of the EHT-SIG may be omitted and the number of user-specific fields may be determined based on the number of users.

As in the example of fig. 8, the common field of the EHT-SIG and the user-specific field of the EHT-SIG may be encoded separately. One user block field included in the user-specific field may include information for two users, but the last user block field included in the user-specific field may include information for one user. That is, one user block field of the EHT-SIG may include up to two user fields. As in the example of fig. 9, each user field may be associated with a MU-MIMO allocation or may be associated with a non-MU-MIMO allocation.

As in the example of fig. 8, the common field of the EHT-SIG may include CRC bits and tail bits. The length of the CRC bits may be determined to be 4 bits. The length of the tail bit may be determined to be 6 bits and may be set to "000000".

As in the example of fig. 8, the common field of the EHT-SIG may include RU allocation information. RU allocation information may mean information related to locations of RU to which a plurality of users (i.e., a plurality of receiving STAs) are allocated. RU allocation information may be configured in units of 8 bits (or N bits), as shown in table 1.

A mode may be supported in which the common field of the EHT-SIG is omitted. Omitting the mode in the common field of the EHT-SIG may be referred to as a compressed mode. When the compressed mode is used, a plurality of users (i.e., a plurality of receiving STAs) may decode a PPDU (e.g., a data field of the PPDU) based on non-OFDMA. That is, a plurality of users of the EHT PPDU may decode PPDUs (e.g., data fields of PPDUs) received through the same frequency band. Further, when the non-compressed mode is used, a plurality of users of the EHT PPDU may decode the PPDU (e.g., a data field of the PPDU) based on the OFDMA. That is, multiple users of the EHT PPDU may receive the PPDU (e.g., a data field of the PPDU) through different frequency bands.

The EHT-SIG may be configured based on various MCS schemes. As described above, information related to an MCS scheme applied to the EHT-SIG may be included in the U-SIG. The EHT-SIG may be configured based on a DCM scheme. For example, among N data tones (e.g., 52 data tones) allocated for an EHT-SIG, a first modulation scheme may be applied to consecutive half tones, and a second modulation scheme may be applied to consecutive remaining half tones. That is, the transmitting STA may modulate specific control information into a first symbol and allocate it to consecutive half tones using a first modulation scheme, and may modulate the same control information into a second symbol and allocate it to consecutive remaining half tones using a second modulation scheme. As described above, information (e.g., a 1-bit field) regarding whether to apply the DCM scheme to the EHT-SIG may be included in the U-SIG. The HE-STF of fig. 10 may be used to improve automatic gain control estimation in a multiple-input multiple-output (MIMO) environment or an OFDMA environment. The EHT-LTF of fig. 10 may be used to estimate channels in a medium MIMO environment or an OFDMA environment.

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The PPDU of fig. 10 (e.g., EHT-PPDU) may be configured based on the examples of fig. 5 and 6.

For example, an EHT PPDU transmitted on a 20MHz band, i.e., a 20MHz EHT PPDU, may be configured based on the RU of fig. 5. That is, the location of the EHT-STF, the RU of the EHT-LTF, and the data field included in the EHT PPDU may be determined as shown in FIG. 5.

The EHT PPDU transmitted on the 40MHz band, i.e., the 40MHz EHT PPDU, may be configured based on the RU of fig. 6. That is, the location of the EHT-STF, the RU of the EHT-LTF, and the data field included in the EHT PPDU may be determined as shown in FIG. 6.

Because the RU position of fig. 6 corresponds to 40MHz, when the pattern of fig. 6 is repeated twice, a tone plan of 80MHz can be determined. That is, the 80MHz EHT PPDU may be transmitted based on a new tone plan in which not the RU of fig. 7 but the RU of fig. 6 is repeated twice.

When the pattern of fig. 6 is repeated twice, 23 tones (i.e., 11 guard tones +12 guard tones) may be configured in the DC region. That is, the tone plan of the 80MHz EHT PPDU based on OFDMA allocation may have 23 DC tones. In contrast, an 80MHz EHT PPDU based on non-OFDMA allocation (i.e., a non-OFDMA full bandwidth 80MHz PPDU) may be configured based on 996-RUs and may include 5 DC tones, 12 left guard tones, and 11 right guard tones.

The tone plan of 160/240/320MHz may be configured such that the pattern of fig. 6 is repeated several times.

The PPDU of fig. 10 may be determined (or identified) as an EHT PPDU based on the following method.

The receiving STA may determine the type of the RX PPDU as an EHT PPDU based on the following. For example, 1) when the first symbol following the L-LTF signal of the RX PPDU is a BPSK symbol; 2) When detecting the RL-SIG repeated by the L-SIG of the RX PPDU; and 3) when a result of applying "modulo 3" to a value of a length field of an L-SIG of the RX PPDU is detected as "0", the RX PPDU may be determined as an EHT PPDU. When the RX PPDU is determined as an EHT PPDU, the receiving STA may detect the type of the EHT PPDU (e.g., SU/MU/trigger-based/extension range type) based on bit information included in a symbol after the RL-SIG of fig. 10. In other words, the receiving STA may be based on: 1) A first symbol after the L-LTF signal as a BPSK symbol; 2) The RL-SIG is adjacent to the L-SIG field and is the same as the L-SIG; 3) The L-SIG includes a length field set to "0" as a result of applying modulo 3; and 4) a 3-bit PHY version identifier (e.g., a PHY version identifier having a first value) of the above U-SIG, determining the RX PPDU as an EHT PPDU.

For example, the receiving STA may determine the type of the RX PPDU as an EHT PPDU based on the following aspects. For example, 1) when the first symbol following the L-LTF signal is a BPSK symbol; 2) When a L-SIG repeated RL-SIG is detected; and 3) when a result of applying modulo 3 to a value of a length field of the L-SIG is detected as "1" or "2", the RX PPDU may be determined as a HE PPDU.

For example, the receiving STA may determine the type of the RX PPDU as non-HT, and VHT PPDUs based on the following aspects. For example, 1) when the first symbol following the L-LTF signal is a BPSK symbol; and 2) when no L-SIG repeated RL-SIG is detected, the RX PPDU may be determined to be a non-HT, and VHT PPDU. In addition, even if the receiving STA detects that the RL-SIG is repeated, when the result of applying "modulo 3" to the length value of the L-SIG is detected as "0", the RX PPDU may be determined as non-HT, and VHT PPDUs.

In the following examples, signals represented as (TX/RX/UL/DL) signals, (TX/RX/UL/DL) frames, (TX/RX/UL/DL) packets, (TX/RX/UL/DL) data units, (TX/RX/UL/DL) data, etc. may be signals transmitted/received based on the PPDU of fig. 10. The PPDU of fig. 10 may be used to transmit/receive various types of frames. For example, the PPDU of fig. 10 may be used for the control frame. Examples of control frames may include Request To Send (RTS), clear To Send (CTS), power save poll (PS-poll), blockACKReq, blockAck, null Data Packet (NDP) advertisement, and trigger frames. For example, the PPDU of fig. 10 may be used for management frames. Examples of the management frame may include a beacon frame, (re) association request frame, (re) association response frame, probe request frame, and probe response frame. For example, the PPDU of fig. 10 may be used for the data frame. For example, the PPDU of fig. 10 may be used to simultaneously transmit at least two or more of a control frame, a management frame, and a data frame.

Fig. 11 illustrates an example of a transmitting apparatus and/or a receiving apparatus of the modification of the present specification.

Each device/STA of sub-graph (a)/(b) of fig. 1 may be modified as shown in fig. 11. Transceiver 630 of fig. 11 may be identical to transceivers 113 and 123 of fig. 1. The transceiver 630 of fig. 11 may include a receiver and a transmitter.

Processor 610 of fig. 11 may be identical to processors 111 and 121 of fig. 1. Alternatively, the processor 610 of FIG. 11 may be identical to the processing chips 114 and 124 of FIG. 1.

Memory 620 of fig. 11 may be identical to memories 112 and 122 of fig. 1. Alternatively, memory 620 of FIG. 11 may be a separate external memory from memories 112 and 122 of FIG. 1.

Referring to fig. 11, a power management module 611 manages power for the processor 610 and/or the transceiver 630. The battery 612 provides power to the power management module 611. The display 613 outputs the result processed by the processor 610. Keypad 614 receives input to be used by processor 610. Keypad 614 may be displayed on display 613. The SIM card 615 may be an integrated circuit for securely storing an International Mobile Subscriber Identity (IMSI) and its associated keys for identifying and authenticating users on mobile telephone devices, such as mobile telephones and computers.

Referring to fig. 11, a speaker 640 may output results related to sound processed by the processor 610. The microphone 641 may receive input related to sounds to be used by the processor 610.

1. Embodiments useful in the present disclosure

In WLAN 802.11be systems, it is considered to use a wider frequency band than the existing 802.11ax or use more antennas to transmit more streams to increase peak throughput. In addition, the present specification also contemplates methods for aggregating and using various frequency bands/links.

The present specification proposes the following method: when 320MHz PPDUs are transmitted and received in consideration of a wide bandwidth or the like, the same phase rotation/EHT-STF/EHT-LTF sequence is always used and the same preamble puncturing is applied for an EHT PPDU portion transmitted on the same channel for an a-PPDU or EHT PPDU to which SST is applied.

Fig. 12 is a diagram of a representative a-PPDU.

Referring to fig. 12, each child PPDU may be a HE PPDU/EHT PPDU or a PPDU of an EHT (or EHT issue 2) of a later version. However, it may be desirable for the HE PPDU to be transmitted within the primary 160 MHz. In addition, it may be desirable to transmit the same type of sub PPDUs within the primary 160MHz and the secondary 160 MHz. Through the SST mechanism, each STA may be assigned to a specific 80MHz or higher frequency band, and a sub PPDU for each STA may be transmitted in the frequency band, or each STA may transmit the sub PPDU. For example, through SST (sub-channel selective transmission), an STA allocated to the primary 160MHz transmits and receives the HE PPDU, and an STA allocated to the secondary 160MHz transmits and receives the EHT PPDU.

Fig. 10 shows a representative EHT MU PPDU format.

Referring to fig. 10, the u-SIG has a length of 4 μs per symbol and is composed of two symbols, so it has a total length of 8 μs. The EHT-SIG has a length of 4 μs per symbol. The EHT-STF has a length of 4 μs, and a symbol period of the EHT-LTF may vary according to a GI (guard interval) and an LTF size.

Fig. 13 shows a structure of U-SIG.

The universal signal (U-SIG) is divided into a version-independent field and a version-dependent field, as shown in fig. 13.

The bandwidth of the PPDU may be indicated using a Bandwidth (BW) field that may be included in a version independent field of the U-SIG. In addition, a preamble puncturing pattern based on 20MHz within each 80MHz may be indicated in addition to the bandwidth field. This may help a STA decoding a particular 80MHz decode the EHT-SIG. Thus, assuming that this information is carried in the U-SIG, the configuration of the U-SIG may change every 80 MHz.

In addition, the version-independent field may include a 3-bit version identifier indicating the 802.11be and Wi-Fi version after the 802.11be, a 1-bit DL/UL field, BSS color, TXOP duration, etc., and the version-dependent field may include information such as PPDU type. In addition, the U-SIG is jointly encoded with two symbols and consists of 52 data tones and 4 pilot tones every 20 MHz. Ext> inext> additionext>,ext> itext> isext> modulatedext> inext> theext> sameext> mannerext> asext> HEext> -ext> SIGext> -ext> Aext>.ext> I.e. it is modulated with a BPSK 1/2 code rate. In addition, the EHT-SIG may be divided into a common field and a user-specific field and may be encoded with a variable Modulation and Coding Scheme (MCS). May have a 1 2 1 2 … structure in units of 20MHz as in the existing 802.11 ax. It may have (consist of) other structures such as 1 23 4 … or 1 2 1 23 4 3 4 …, or may be configured in units of 80MHz, and in a bandwidth of 80MHz or higher, the EHT-SIG may be duplicated in units of 80MHz or composed of different information.

In this specification, it is assumed that when the aggregated PPDU is composed of the HE and EHT PPDUs, the HE PPDU is transmitted within the primary 160MHz and the EHT PPDU is transmitted within the secondary 160MHz. In this case, each HE/EHT PPDU may be transmitted at a maximum of 160MHz, and transmission below 80MHz is also possible, but transmission below 80MHz may be undesirable because it may result in less than 50% channel usage. Therefore, only 80/160MHz is considered for the BW of each HE/EHT PPDU. However, additional puncturing may be applied within each 80/160MHz PPDU.

The HE PPDU may be a UL/DL PPDU (determined according to UL/DL of the a-PPDU), and the BW indicator of the HE PPDU may use an existing 802.11ax method as it is. Ext> thatext> isext>,ext> BWext> fieldsext> inext> HEext> -ext> SIGext> -ext> Aext> definedext> inext> HEext> (ext> ERext>)ext> SUext> PPDUext>,ext> HEext> MUext> PPDUext>,ext> andext> HEext> TBext> PPDUext> mayext> beext> usedext> toext> indicateext> itext>.ext>

The EHT PPDU may also be a UL/DL PPDU (determined according to the UL/DL of the A-PPDU), and the BW indicator of the EHT PPDU may use a reserved field among BW fields of the U-SIG. The following is the BW field in the U-SIG field of the EHT MU PPDU.

TABLE 3

The following is the BW field in the U-SIG field of the EHT TB PPDU.

TABLE 4

When such an a-PPDU (a combination of HE PPDU and EHT PPDU) is transmitted and received, SST can basically be applied. The STA allocated to the secondary 160MHz may be basically an EHT STA, may be an STA whose dot11 ehtbaselinelinefoumentedonly parameter is set to false, and may transmit and receive an EHT PPDU. The STA allocated to the main 160MHz may be an HE STA and an EHT STA, and the EHT STA may be an STA in which the dot11 ehtbaselinefoumtedendenly parameter is set to true or false, and may transmit and receive an HE PPDU.

In addition, SST may be applied even when one EHT PPDU is transmitted and received instead of an a-PPDU. In this case, the EHT STA may always be assigned to the primary/secondary 160MHz. However, the EHT STA allocated to the secondary 160MHz may be the STA with the dot11 EHTBaseLineFeatureImmentedOnly parameter set to false. The STA allocated to the primary 160MHz may be the STA whose dot11 ehtbaselinebreak implementedonly parameter is set to true or false.

When BW is indicated at the time of transmitting and receiving an a-PPDU (a combination of an HE PPDU and an EHT PPDU), it is apparent that the bandwidth of the HE PPDU will be set to a maximum of 160MHz according to the transmitted size. However, the bandwidth of the EHT PPDU transmitted and received at the secondary 160MHz may be set to a maximum of 160MHz simply according to the transmitted size, or may be set to a maximum of 320MHz in consideration of the total size of the a-PPDU. In addition, various types of a-PPDU indicators may also be considered, and in this case, reserved/ignored/verified bits may be used among various signaling fields.

When SST is applied, it is also considered that only one 320MHz EHT PPDU, not an a-PPDU, is transmitted and received, and in this case BW may be indicated at 320MHz. Alternatively, it may be configured as an a-PPDU, which is a combination of an EHT PPDU and an HE PPDU, similar to the a-PPDU, which is a combination of an EHT PPDU and an HE PPDU. Each sub EHT PPDU may configure the primary/secondary 160MHz, and the bandwidth of each sub EHT PPDU may be set to a maximum of 160MHz or simply set to 320MHz in consideration of the entire a-PPDU size. In addition, various types of A-PPDU indicators may also be considered. In addition, each sub EHT PPDU may be configured in units of 80MHz. In this case, the bandwidth of each sub EHT PPDU may be set to a maximum of 80MHz. Alternatively, the bandwidth of each sub EHT PPDU may be set to a maximum of 160MHz, or may be set to a maximum of 320MHz in consideration of the bandwidth of the entire a-PPDU. In addition, various types of A-PPDU indicators may be considered.

As can be seen from the above, if an EHT STA is assigned to the secondary 160MHz through SST, the EHT STA always transmits and receives the EHT PPDU regardless of whether the a-PPDU (a combination of the HE PPDU and the EHT PPDU or the EHT-only PPDU) or only one EHT PPDU is transmitted. In view of this situation, for an EHT STA of secondary 160MHz allocated to transmit and receive an EHT PPDU, regardless of PPDU type and bandwidth indication, if a method for applying a phase rotation/EHT-STF/EHT-LTF sequence and a method for indicating preamble puncturing (a preamble puncturing method may be considered only in the case of DL) are set in the same form, it may be advantageous to implement. Also, in the case of a PPDU type in which an EHT PPDU is transmitted and received at a primary 160MHz, it may be advantageous in terms of implementation for an EHT STA allocated to the primary 160MHz if a method for applying a phase rotation/EHT-STF/EHT-LTF sequence and a method for indicating preamble puncturing are set in the same form.

Therefore, in consideration of this situation when SST is applied, in transmission of an a-PPDU (a combination of a HE PPDU and an EHT PPDU or an EHT-only PPDU) or transmission of only one EHT PPDU instead of an a-PPDU, as shown below, the specification proposes a method for applying a phase rotation/EHT-STF/EHT-LTF sequence and a method for indicating preamble puncturing. The following is a puncturing channel information field defined in the U-SIG of the EHT MU PPDU, and the puncturing channel information field indicates a preamble puncturing pattern.

TABLE 5

The configuration of the puncture channel information field for each BW in the non-OFDMA case is shown below.

TABLE 6

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Next, the specification proposes an EHT-STF sequence and an EHT-LTF sequence.

The EHT-STF sequence of the EHT MU PPDU in 160MHz transmission is as follows.

EHTS _{-1008：16：1008} ＝{M，1，-M，0，-M，1，-M，0，-M，-1，M，0，-M，1，-M}*(1+j)/sqrt(2)

The EHT-STF sequence of the EHT TB PPDU in 160MHz transmission is as follows.

EHTS _{-1008：8：1008} ＝{M，-1，M，-1，-M，-1，M，0，-M，1，M，1，-M，1，-M，1，-M，1，-M，1，M，1，-M，1，-M，1，M，1，-M，1，-M}*(1+j)/sqrt(2)

The EHT-STF sequence of the EHT MU PPDU in 320MHz transmission is as follows.

EHTS _{-2032：16：2032} ＝{M，1，-M，0，-M，1，-M，0，M，1，-M，0，-M，1，-M，0，-M，-1，M，0，M，-1，M，0，-M，-1，M，0，M，-1，M}*(1+j)/sqrt(2)

The EHT-STF sequence of the EHT TB PPDU in 320MHz transmission is as follows.

EHTS _{-2032：8：2032} ＝{M，-1，M，-1，-M，-1，M，0，-M，1，M，1，-M，0，M-1，M，-1，-M，-1，M，0，-M，1，M，1，-M，1，-M，0，-M1，-M，1，M，1，-M，0，M-1，-M-1，M，-1，M，0，-M，1，-M，1，M，1，-M，0，M，-1，-M，-1，M，-1，M}*(1+j)/sqrt(2)

The M sequence is defined as follows.

M＝{-1，-1，-1，1，1，1，-1，1，1，1，-1，1，1，-1，1}

For 160MHz transmission, the 1 xEHT-LTF sequence is as follows:

EHTLTF _-1012，1012 ＝

{LTF _{80MHz_lower_1x} ，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，LTF _{80MHz_upper_1x} }

wherein,

LTF _{80MHz_lower_1x} ＝{LTF _{80MHz_left_1x} ，0，LTF _{80MHz_right_1x} should } beIs used in the lower 80MHz frequency band,

LTF _{80MHz_upper_1x} ＝{LTF _{80MHz_left_1x} ，0，-LTF _{80MHz_right_1x} should be used in the upper 80MHz frequency band,

LTF _{80MHz_left_1x} ＝{-1，0，0，0，-1，0，0，0，+1，0，1，1，+1，0，0，1，+1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，1，0，-1，0，0，0，+1，0，0，0，-1，1，0，0，+1，0，1，1，+1，0，0，0，+1，0，1，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，-1，1，0，1，-1，0，1，0，+1，0，1，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0}

LTF _{80MHz_right_1x} ＝{0，0，0，-1，0，0，0，+1，1，0，0，+1，1，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，1，0，0，-1，1，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，+1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，0，-1，0，0，1，+1，0，0，0，-1，0，0，00，+1，0，0，00，-1，0，0，0，-1，0，0，0，-1，0，0，0，+1，0，0，0，+1}

for 160MHz transmission, the 2 xEHT-LTF sequence is as follows:

HELTF _-1012，1012 ＝{LTF _{80MHz_lower_2x} ，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，LTF _{80MHz_upper_2x} }

wherein,

LTF _{80MHz_lower_2x} ＝{LTF _{80MHz_part1_2x} ，LTF _{80MHz_part2_2x} ，LTF _{80MHz_part3_2x} ，LTF _{80MHz_part4_2x} ，LTF _{80MHz_part5_2x} should be used in the lower 80MHz frequency sub-block

LTF _{80MHz_upper_2x} ＝{LTF _{80MHz_part1_2x} ，-LTF _{80MHz_part2_2x} ，LTF _{80MHz_part3_2x} ，LTF _{80MHz_part4_2x} ，-LTF _{80MHz_part5_2x} Should be used in the upper 80MHz frequency sub-block

LTF _{80MHz_part1_2x} ＝{+1，0，+1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，1，+1，0，-1，0，+1，0，+1，0，-1，0，+1，0}

LTF _{80MHz_part2_2x} ＝{+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0.+1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，+1，0，+1，0，-1，，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，-1，1，-1，0，-1，0，-1，0，+1，0，-1，0，-1，1，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0}

LTF _{80MHz_part3_2x} ＝{+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，0，0，0，0，0，0，+1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1}

LTF _{80MHz_part4_2x} ＝{0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1}

LTF _{80MHz_part5_2x} ＝{0，+1，0，-1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1}

For 160MHz transmission, the 4xEHT-LTF sequence is as follows:

HELTF _-1012，1012 ＝{LTF _{80MHz_lower_4x} ，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，0，LTF _{80MHz_upper_4x} }

wherein,

LTF _{80MHz_lower_4x} ＝{LTF _{80MHz_left_4x} ，0，LTF _{80MHz_right_4x} should be used in the lower 80MHz frequency band,

LTF _{80MHz_upper_4x} ＝{LTF _{80MHz_left4x} ，0，-LTF _{80MHz_right_4x} should be used in the upper 80MHz frequency band,

LTF _{80MHz_left_4x} ＝{+1，+1，-1，+1，-1，+1，-1，-1，-1，+1，-1，-1，-1，+1，+1，-1，+1，+1，+1，+1，+1，-1，-1，+1，+1，+1，+1，-1，+1，-1，+1，-1，-1，+1，+1，-1，+1，+1，+1，-1，-1，+1，-1，-1，-1，-1，+1，+1，+1，-1，-1，-1，-1，-1，-1，+1，+1，+1，+1，+1，+1，-1，+1，+1，+1，-1，+1，+1，-1，-1，-1，+1，-1，+1，-1，-1，+1，+1，-1，+1，-1，+1，+1，+1，+1，+1，-1，-1，+1，+1，+1，-1，+1，+1，-1，-1，-1，+1，-1，+1，+1，-1，+1，+1，-1，+1，-1，-1，+1，+1，+1，+1，-1，-1，+1，+1，+1，+1，+1，-1，+1，+1，-1，-1，-1，+1，-1，-1，-1，+1，-1，+1，-1，+1，+1，-1，+1，-1，+1，-1，+1，+1，+1，-1，+1，+1，+1，-1，-1，+1，-1，-1，-1，-1，-1，+1，+1，-1，-1，-1，-1，+1，-1，+1，-1，+1，+1，-1，-1，+1，-1，-1，-1，+1，+1，-1，+1，+1，+1，+1，-1，-1，-1，+1，+1，+1，+1，-1，+1，+1，+1，+1，+1，+1，+1，-1，+1，+1，+1，-1，+1，+1，-1，-1，-1，+1，-1，+1，-1，-1，+1，+1，-1，+1，-1，+1，+1，+1，+1，+1，-1，-1，+1，+1，+1，-1，+1，+1，-1，-1，-1，+1，-1，+1，+1，-1，+1，+1，-1，+1，-1，-1，+1，-1，+1，-1，+1，-1，+1，+1，+1，-1，+1，+1，+1，-1，-1，+1，-1，-1，-1，-1，-1，+1，+1，-1，-1，-1，-1，+1，-1，+1，-1，+1，+1，-1，-1，+1，-1，-1，-1，+1，+1，-1，+1，+1，+1，+1，-1，-1，-1，+1，+1，+1，+1，-1，+1，-1，-1，-1，-1，-1，-1，+1，-1，-1，-1，+1，-1，-1，+1，+1，+1，-1，+1，-1，+1，+1，-1，-1，+1，-1，+1，-1，-1，-1，-1，-1，+1，+1，-1，-1，-1，+1，-1，-1，+1，+1，+1，-1，+1，-1，-1，+1，-1，-1，+1，-1，+1，+1，+1，+1，+1，+1，-1，-1，+1，+1，+1，+1，+1，-1，+1，+1，-1，-1，-1，+1，-1，-1，-1，+1，-1，+1，-1，+1，+1，-1，+1，-1，+1，-1，+1，+1，+1，-1，+1，+1，+1，-1，-1，+1，-1，-1，-1，-1，-1，+1，+1，-1，-1，-1，-1，+1，-1，+1，-1，+1，+1，-1，-1，+1，-1，-1，-1，+1，+1，-1，+1，+1，+1，+1，-1，-1，-1，+1，+1，+1，+1，-1，-1，+1，+1，+1，+1，+1，+1，-1，+1，+1，+1，-1，+1，+1，-1，-1，-1，+1，-1，+1，-1，-1，+1，+1，-1，+1，-1，+1，+1，+1，+1，+1，-1，-1，+1，+1，+1，-1，+1，+1，-1，-1，-1，+1，-1，+1，+1，-1，+1，+1，-1，+1，-1，-1，-1，+1，-1，+1，-1，-1，-1，-1，+1，+1，+1，-1，-1，+1，0，0}

LTF _{80MHz_right_4x} = {0, +1, -1, -1, -1, -1, -1, -1, +1, -1, -1, +1, -1, +1, -1, -1, -1, +1, -1, -1, +1, -1, +1, -1, -1, +1, -1, -1, -1, -1, -1, -1, +1, -1, -1, -1, +1, -1, -1, -1, -1, -1, +1, a 1, -1, +1, -1, -1, -1, +1, a 1, -1, +1, -1, +1, -1, -1, -1, -1, +1, +1, -1, -1, -1, +1, -1, -1, +1, +1, +1, -1, +1, -1, -1, +1 ，-1，-1，+1.-1，+1，+1，+1，-1，+1，-1，-1，+1，+1，-1，+1，-1，+1，+1，+1，-1，-1，+1，-1，-1，-1，+1，-1，-1，-1，-1，-1，-1，-1，+1，-1，+1，+1，-1，+1，+1，-1，+1，-1，-1，-1，+1，+1，-1，+1，+1，+1，-1，-1，+1，+1，+1，+1，+1，-1，+1，-1，-1，-1，-1，+1，+1，-1，-1，-1，-1，-1，+1，-1，-1，+1，+1，+1，-1，+1，+1，+1，-1，+1，-1，+1，-1，-1，-1，-1，-1，+1，+1，+1，-1，-1，-1，-1，+1，-1，-1，+1，+1，+1，-1，+1，+1，-1，-1，+1，-1，+1，-1，+1，+1，+1，-1，+1，-1，-1，+1，+1，-1，+1，-1，+1，+1，+1，-1，-1，+1，-1，-1，-1，+1，-1，-1，-1，-1，-1，-1，-1，+1，-1，+1，+1，-1，+1，+1，-1，+1，-1，-1，-1，+1，+1，-1，+1，+1，+1，-1，-1，+1，+1，+1，+1，+1，-1，+1，+1，+1，+1，+1，-1，-1，+1，+1，+1，+1，+1，-1，+1，+1，-1，-1，-1，+1，-1，-1，-1，+1，-1，+1，-1，+1，+1，+1，+1，+1，-1，-1，-1，+1，+1，+1，+1，-1，+1，+1，-1，-1，-1，+1，-1，-1，+1，+1，-1，+1，-1，+1，-1，-1，-1，-1，-1，-1，+1，+1，-1，-1，-1，+1，-1，-1，+1，+1，+1，-1，+1，-1，-1，+1，-1，-1，+1，-1，+1，-1，+1，-1，+1，-1，-1，+1，+1，-1，+1，-1，+1，+1，+1，-1，-1，+1，-1，-1，-1，+1，-1，-1，-1，-1，-1，-1，-1，+1，-1，+1，+1，-1，+1，+1，-1，+1，-1，-1，-1，+1，+1，-1，+1，+1，+1，-1，-1，+1，+1，+1，+1，+1，-1，+1，-1，-1，-1，-1，+1，+1，-1，-1，-1，-1，-1，+1，-1，-1，+1，+1，+1，-1，+1，+1，+1，-1，+1，-1，+1，-1，-1，-1，-1，-1，+1，+1，+1，-1，-1，-1，-1，+1，-1，-1，+1，+1，+1，-1，+1，+1，-1，-1，+1，-1，+1，-1，+1}

For 320MHz transmission, the 1 xEHT-LTF sequence is as follows:

EHTLTF _-2036，2036 ＝

{LTF _{80MHz_1st_1x} ，0 ₂₃ ，LTF _{80MHz_2nd_1x} ，0 ₂₃ ，LTF _{80MHz_3rd_1x} ，0 ₂₃ ，LTF _{80MHz_4th_1x} }

wherein,

0 ₂₃ meaning 23 consecutive 0 s.

LTF8 _{0MIIz_1st_1x} ＝{LTF _{80MIIz_left_1x} ，0，LTF _{80MHz_right_1x} }

LTF _{80MHz_2nd_1x} ＝{LTF _{80MHz_left_1x} ，0，LTF _{80MHz_right_1x} }

LTF _{80MHz_3rd_1x} ＝{-LTF _{80MHz_left_1x} ，0，-LTF _{80MHz_right_1x} }

LTF _{80MHz_4th_1x} ＝{-LTF _{80MHz_left_1x} ，0，-LTF _{80MHz_right_1x} }

For 320MHz transmission, the 2 xEHT-LTF sequence is as follows:

EHTLTF _2036，203 ＝

{LTF _{80MHz_2x} (1：245)，LTF _{80MHz_2x} (246：500)，0，LTF _{80MHz_2x} (502：756)，LTF _{80MHz_2x} (757：1001)，0 ₂₃ ，LTF _{80MHz_2x} (1：245)，-LTF _{80MHz_2x} (246：500)，0，LTF _{80MHz_2x} (502：756)，-LTF _{80MHz_2x} (757：1001)，0 ₂₃ ，LTF _{80MHz_2x} (1：245)，-LTF _{80MHz_2x} (246：500)，0，-LTF _{80MHz_2x} (502：756)，LTF _{80MHz_2x} (757：1001)，0 ₂₃ ，LTF _{80MHz_2x} (1：245)，LTF _{80MHz_2x} (246：500)，0，-LTF _{80MHz_2x} (502：756)，-LTF _{80MHz_2x} (757：1001)}

wherein,

LTF _{80MHz_2x} ＝[+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，-1，0，+1，1，+1，1，-1，0，-1，0，+1，0，-1，0，+1，0，+1，1，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，-1，0，+1，0，+1，0，1，0，+1，0，+1，1，1，0，1，0，+1，0，+1，0，+1，0，1，0，1，1，+1，0，+1，0，1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，+l，0，+1，0，-1，00，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0、+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，-1，1，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，-1，0，-1，0，+1，0，0，0，0，0，0，0，-1，0，-1，0，-1，0，-1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1、0，+1，0，-1，0，+1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，+1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1.0，+1，0，+1，0，-1，0，-1，0，+1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0.+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，-1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，+1，0，+1，0，-1，0，-1，1，+1，0，+1，0，+1，0，-1，0，-1，0，-1，0，+1，0，-1，0，+1，1，-1，0，-1，0，-1，0，+1，0，+1，1，-1，0，+1，0，-1，1，-1，0，-1，0，-1，0，+1，0，-1，0，-1，1，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，1，+1，0，+1，0，+1，0，+1，0，-1，0，-1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，-1，0，-1，0，-1，0，+1，0，+1，0，-1，0，+1，0，+1，0，+1，0，+1，0，+1，0，-1，0，+1，0，+1].

0 ₂₃ meaning 23 consecutive 0 s.

For 320MHz transmission, the 4 xEHT-LTF sequence is as follows:

EHTLTF _-2036，2036 ＝

{LTF _{80MHz_sublock_left_4x} ，0 ₅ ，LTF _{80MHz_subblock_right_4x} ，0 ₂₃ ，

LTF _{80MHz_subblock_left_4x} ，0 ₅ ，-LTF _{80MHz_subblock_right_4x} ，0 ₂₃ ，

-LTF _{80MHz_subblock_left_4x} ，0 ₅ ，-LTF _{80MHz_subblock_right_4x} ，0 ₂₃ ，

-LTF _{80MHz_subblock_lcft_4x} ，0 ₅ ，LTF _{80MHz_subblock_right_4x} }

wherein,

LTF _{80MHz_subblock_lefef_4x} ＝[+1，-l，-1，-1，-1，+1，-1，-1，+1，-1，-1，-1，+1，+1，-1，-1，-1，+1，-1，-1，+1，-1，+1，+1，+1，-1，+1，-1，+1，-1，-1，-1，-1，+1，+1，+1，+1，+1，-1，-1，+1，-1，+1，-1，-1，-1，+1，+1，1，1，+1，1，1，1，+1，+1，+1，1，1，+1，+1，1，1，+1，1，+1，+1，1，+1，1，+1，+1，+1，1，+1，1，+1，+1，+1，+1，+1，+1，1，1，1，+1，1，+1，1，1，1，+1，1，1，+1，+1，+1，+1，+1，+1，1，+1，1，+1，+1，1，+1，1，+1，1，+1，1，+1，1，1，+1，+1，+1，+1，1，1，1，1，1，1，1，1，+1，1，1，+1，1，1，+1，+1，+1，1，+1，1，1，1，+1，+1，+1，1，+1，+1，-1，-1，+1，-1.-1，-1，+1，+1，+1，+1，-1，+1，+1，+1，+1，+1，+1，-1，+1，-1，-1，+1，-1，+1，-1，-1，1，+1，+1，+1，+1，-1，+1，+1，-1，-1，+1，+1，+1，-1，+1，+1，-1，+1，+1，-1，-1，+1，+1，-1，-1，-1，-1，+1，+1，+1，+1，+1，-1，+1，+1，+1.+1，+1，-1，+1，-1，+1，-1，-1，+1，-1，-1，-1，-1，-1，+1，-1，-1，-1，+1，+1，-1，+1，-1，+1，-1，-1，-1，-1，-1，+1，+1，+1，+1，-1，+1，-1，-1，+1，+1，-1，-1，-1，+1，+1，+1，+1，+1，-1，+1，-1，+1，-1，-1，+1，+1，+1，-1，+1，+1.+1，+1，+1，-1，+1，+1，-1，+1，-1，+1，-1，-1，-1，-1，-1，+1，-1，-1，-1，-1，-1，+1，+1，+1，+1，-1，-1，+1，+1，-1，-1，+1，-1，-1，+1，-1，-1，-1，+1，+1，-1，-1，+1，-1，-1，-1，-1，-1，+1，+1，-1，+1，-1，+1，+1，-1，+1，-1，-1，-1，-1，-1，-1，+1，-1，-1，-1，-1，+1，+1，+1，-1，+1，+1，-1，-1，+1，-1，-1，-1，+1，+1，+1，-1，+1，-1，+1，-1，-1，-1，+1，-1，+1，-1，+1，-1，-1，-1，+1，-1，-1，+1，-1，+1，+1，-1，-1，-1，+1，+1，-1，-1，-1，-1，+1，-1，+1，+1，-1，+1，-1，+1，+1，+1，+1，+1，+1，-1，-1，+1，-1，-1，-1，+1，-1，+1，-1，-1，-1，+1，+1，+1，+1，+1，+1，-1，+1，-1，+1，+1，+1，-1，+1，-1，+1，+1，-1，+1，-1，-1，+1，+1，-1，-1，+1，+1，+1，-1，-1，-1，+1，-1，-1，+1，+1，-1，-1，-1，+1，-1，+1，-1，-1，+1，+1，+1，+1，+1，-1，-1，-1，-1，+1，-1，+1，-1，+1，+1，+1，-1，+1，-1，-1，+1，-1，-1，-1，+1，+1，-1，-1，-1，+1，-1，-1，+1，-1，-1，-1，-1，+1，-1，+1，+1，-1，-1，-1，+1，-1，-1 ]

LTF _{80MHz_subblock_right_4x} ＝[-1，-1，+1，-1，+1，+1，+1，+1，+1，+1，-1，-1，-1，-1，+1，-1，-1，+1，-1，-1，-1，+1，+1，-1，-1，-1，+1，-1，-1，+1，-1，+1，+1，+1，-1，+1，-1，+1，-1，-1，-1，-1，+1，+1，+1，+1，+1，-1，-1，+1，-1，+1，-1，-1，-1，+1，+1，-1，-1，+1，-1，-1，-1，+1，+1，+1，-1，-1，+1，+1，-1，-1，+1，-1，+1，+1，-1，+1，-1，+1，+1，+1，-1，1，-1，+1，+1，+1，+1，+1，+1，-1，-1，-1，+1，-1，+1，-1，-1，-1，+1，-1，-1，+1，+1，+1，+1，+1，+1，-1，+1，-1，+1，+1，-1，+1，-1，-1，-1，-1，+1，+1，-1，-1，-1，+1，1，-1，+1，-1，-1，+1，-1，-1，-1，+1，-1，+1，-1，1，-1，-1，-1，+1，-1，+1，-1，+1，+1，+1，-1，-1，-1，+1，-1，-1，+1，+1，-1，+1，+1，+1，-1，-1，-1，-1，+1，-1，-1，-1，-1，-1，-1，+1，-1，+1，+1，-1，+1，-1，+1，+1，-1，-1，-1，-1，-1，+1，-1，-1，+1，+1，-1，-1，-1，+1，-1，-1，+1，-1，-1，+1，+1，-1，-1，+1，+1，+1，+1，-1，-1，-1，-1，-1，+1，-1，-1，-1，-1，-1，+1，-1，+1，-1，+1，+1，-1，+1，+1，+1，+1，+1，-1，+1，+1，+1，-1，-1，+1，-1，+1，-1，+1，+1，+1，+1，+1，-1，-1，-1，+1，+1，-1，-1，-1，-1，-1，-1，-1，-1，+1，+1，+1，+1，+1，-1，+1，-1，+1，-1，1，+1，+1，+1，1，+1，+1，+1，+1，+1，1，+1，+1，1，+1，1，+1，1，1，1，1，1，+1，1，1，1，1，1，+1，+1，+1，+1，1，1，+1，+1，1，1，+1，1，1，+1，1，1，1，+1，+1，1，1，+1，1，1，1，1，1，+1，+1，1，+1，1，+1，+1，1，+1，1，1，1，1，1，1，+1，1，1，1，1，+1，+1，+1，-1，+1，+1，-1，-1，+1，-1，-1，-1，+1，+1，+1，-1，+1，-1，-1，-1，+1，+1，-1，+1，+1，-1，+1，+1，+1，+1，+1，+1，+1，+1，-1，-1，-1，-1，+1，+1，-1，+1，-1，+1，-1，+1，-1，+1，-1，-1，+1，-1，+1，-1，-1，-1，-1，-1，-1，+1，+1，-1，+1，+1，+1，-1，+1，-1，+1，+1，+1，-1，-1，-1，-1，-1，-1，+1，-1，+1，-1，-1，-1，+1，-1，+1，-1，-1，+1，-1，+1，+1，-1，-1，+1，+1，-1，-1，-1，+1，+1，+1，-1，+1，+1，-1，-1，+1，+1，+1，-1，+1，-1，+1，+1，-1，-1，-1，-1，-1，+1，+1，+1，+1，-1，+1，-1，+1，-1，-1，-1，+1，-1，+1，+1，-1，+1，+1，+1，-1，-1，+1，+1，+1，-1，+1，+1，-1，+1，+1，+1，+1，-1].

0 ₅ meaning 5 consecutive 0 s.

0 ₂₃ Meaning 23 consecutive 0 s.

In an A-PPDU transmitted as a combination of the HE PPDU and the EHT PPDU, a primary 160MHz is set according to a bandwidth indication of the HE PPDU. In the following, this description proposes a method for puncturing a secondary 160MHz application sequence and a preamble of an a-PPDU, which is a combination of a HE PPDU and an EHT PPDU, and a method for puncturing a primary/secondary 160MHz application sequence and a preamble of one EHT PPDU, which is not a combination of an EHT PPDU and an a-PPDU.

1.1 examples of puncturing using sequences and preambles according to bandwidth indications

According to the bandwidth indicated in the EHT PPDU of each PPDU type, a method of applying a sequence defined in a corresponding bandwidth and indicating preamble puncturing may be used. That is, in an a-PPDU (a combination of a HE PPDU and an EHT PPDU or an EHT-only PPDU), a method of applying sequence and preamble puncturing is set according to a bandwidth indicated in each sub EHT PPDU. When transmitted as an EHT PPDU instead of an a-PPDU, the sequence is set according to the indicated bandwidth, and a method defined in the corresponding bandwidth is also used to indicate preamble puncturing.

For example, in the case of an a-PPDU, which is a combination of a HE PPDU and an EHT PPDU, if the bandwidth of the EHT PPDU is indicated as 160MHz in the secondary 160MHz, a method of applying a 160MHz sequence and indicating preamble puncturing defined at 160MHz may be used for the EHT PPDU. If the bandwidth of the EHT PPDU is indicated as 320MHz, a method of indicating a preamble puncturing pattern of the entire a-PPDU may be used by applying a sequence corresponding to the secondary 160MHz in the 320MHz sequence and indicating preamble puncturing defined at 320 MHz. In addition, if the bandwidth of the EHT PPDU is indicated as 80MHz, a method of applying an 80MHz sequence to the EHT PPDU and indicating preamble puncturing defined at 80MHz is used.

In the above-mentioned method, since the method of indicating the sequence setting and the preamble puncturing is always determined according to the indicated bandwidth, the method of indicating the same sequence and the same preamble puncturing in all PPDU types cannot be expected, which may be undesirable when implemented.

1.2. Example of using a method of always applying 320MHz sequence and preamble puncturing

Regardless of the PPDU type and bandwidth indication, the AP may always configure the primary/secondary 160MHz sequence based on the 320MHz sequence. In other words, a sequence corresponding to 160MHz of the primary/secondary among 320MHz sequences is used. In addition, the preamble puncturing pattern of the entire a-PPDU may be indicated by applying a method of indicating 320MHz preamble puncturing. Since this configures the sequence according to the assigned position and always indicates the entire 320MHz preamble puncturing pattern, it may be desirable to indicate the same sequence and preamble puncturing in all PPDU types, which may be desirable when implemented. However, if the bandwidth of an EHT PPDU transmitted in a primary/secondary 160MHz is indicated as 160MHz and a specific a-PPDU indicator does not exist in an a-PPDU (a combination of a HE PPDU and an EHT PPDU or an EHT-only PPDU), an error may occur when an OBSS (overlapping basic service set) EHT STA, a non-associated EHT STA, or a dot11 ehtbaselinefoungementedonly parameter is set to a true EHT STA decodes the EHT PPDU transmitted in the corresponding primary/secondary 160 MHz. Thus, in order to prepare for this, it may be desirable to include an a-PPDU indicator in addition to indicating 320MHz or 160MHz in an EHT PPDU transmitted in primary/secondary 160MHz in the a-PPDU.

1.3. Examples of methods using always applied 160MHz sequence and preamble puncturing

Regardless of the PPDU type and bandwidth indication, the primary/secondary 160MHz sequence may always be configured based on the 160MHz sequence. In other words, among the 160MHz sequences, sequences corresponding to each 80MHz within the primary/secondary 160MHz are used. In addition, based on a method for indicating 160MHz preamble puncturing, a preamble puncturing pattern of a 160MHz channel in which a corresponding EHT PPDU is located may be indicated. In addition, when SST is applied, a method of applying the same sequence and preamble puncturing is used in all 160MHz channels, and thus it is contemplated that the same sequence and preamble puncturing method is applied to all PPDU types, which may be desirable when implemented. However, in an a-PPDU (a combination of a HE PPDU and an EHT PPDU or an EHT-only PPDU), if the bandwidth of the EHT PPDU transmitted in the primary/secondary 160MHz is indicated as 320MHz and a specific a-PPDU indicator does not exist, an error may occur when an OBSS EHT STA, a non-associated EHT STA, or a dot11EHT base line STA, or a true EHT STA sets to decode the EHT PPDU transmitted in the corresponding primary/secondary 160 MHz. Thus, in preparation for this case, in an EHT PPDU transmitted on the primary/secondary 160MHz in an a-PPDU (a combination of an HE PPDU and an EHT PPDU or an EHT-only PPDU), it may be desirable to include an a-PPDU indicator in addition to indicating 160MHz or 320 MHz. In addition to this problem, if one EHT PPDU is transmitted instead of the a-PPDU format, since the bandwidth is indicated as 320MHz, an error may occur when an OBSS EHT STA or an unassociated EHT STA decodes the EHT PPDU transmitted in the corresponding primary/secondary 160 MHz. Thus, in terms of a sequence unified and unified preamble puncturing indication method, the method may not be desirable. In this case, it can be solved by considering one EHT PPDU indicator to which SST is applied (not in a-PPDU format), and it can use reserved/ignored/verified bits among various signaling fields, and bits used in the a-PPDU indicator can also be used as they are. This is because the a-PPDU also uses SST, and it can be considered to indicate the same content by this. Alternatively, when SST is applied at 320MHz, transmission of only one EHT PPDU, not an a-PPDU, is not considered. In this case, it may be replaced with an a-PPDU transmission that always considers a combination of a sub EHT PPDU transmitted in the primary 160MHz and a sub EHT PPDU transmitted in the secondary 160MHz (a combination of sub EHT PPDUs in units of 80MHz may be considered, but the sequence may be applied in units of 160MHz, and a preamble puncturing instruction may also be applied in units of 160 MHz). In this way, a method for indicating sequence unity and unified preamble puncturing can be implemented. However, transmission of only one EHT PPDU, not an a-PPDU, cannot be considered only at 320MHz where SST is used. In bandwidths other than 320MHz, even if SST is applied, transmission of only one EHT PPDU instead of the a-PPDU may be considered.

In the above proposal, a new preamble puncturing pattern may be added to indicate preamble puncturing. For example, a preamble puncturing pattern corresponding to 1001 in OFDMA transmission and 3 x 996+242 Resource Units (RUs) in non-OFDMA transmission may be defined.

The PPDU indicator to which the SST of proposal 1.3 is applied may be applied not only to the environment of proposal 1.3 but also to all PPDUs to which SST is generally applied.

When SST is applied at 320MHz in proposal 1.3, in a general case other than a method for indicating sequence unification and unified preamble puncturing, a proposal may be applied that does not consider transmission of only one EHT PPDU instead of an a-PPDU. In other words, when SST is applied at 320MHz, transmission of only one EHT PPDU, not an a-PPDU, is not always considered, and transmission of only an a-PPDU (a combination of HE PPDU and EHT PPDU or EHT-PPDU only) may be considered.

Fig. 14 is a process flow chart illustrating the operation of the transmitting apparatus according to this embodiment.

The example of fig. 14 may be performed by a transmitting STA or a transmitting device (AP and/or non-AP STA).

Some of each step (or detailed sub-steps to be described later) in the example of fig. 14 may be omitted or changed.

The transmitting apparatus (transmitting STA) can obtain information on the above tone plan through step S1410. As described above, the information on the tone plan includes the size and location of the RU, control information related to the RU, information on a frequency band including the RU, information on a STA receiving the RU, and the like.

The transmitting apparatus may configure/generate a PPDU based on the acquired control information through step S1420. The step of configuring/generating the PPDU may include the step of configuring/generating each field of the PPDU. That is, step S1420 includes a step of configuring an EHT-SIG field including control information regarding a tone plan. That is, step S1420 may include a step of configuring a field including control information (e.g., N bitmaps) indicating the size/position of the RU and/or a step of configuring a field including an identifier (e.g., AID) of a STA receiving the RU.

In addition, step S1420 may include a step of generating an STF/LTF sequence transmitted through a specific RU. The STF/LTF sequence may be generated based on a preset STF generation sequence/LTF generation sequence.

In addition, step S1420 may include a step of generating a data field (i.e., MPDU) transmitted through a specific RU.

The transmitting apparatus may transmit the PPDU constructed through step S1420 to the receiving apparatus based on step S1430.

Upon performing step S1430, the transmitting apparatus may perform at least one of operations such as CSD, spatial mapping, IDFT/IFFT operations, and GI insertion.

Signals/fields/sequences constructed in accordance with the present description may be transmitted in the form of fig. 10.

Fig. 15 is a process flow chart illustrating the operation of the receiving apparatus according to the present embodiment.

The PPDU mentioned above may be received according to the example of fig. 15.

The example of fig. 15 may be performed by a receiving STA or a receiving device (AP and/or non-AP STA).

Some of each step (or detailed sub-steps to be described later) in the example of fig. 15 may be omitted.

The reception apparatus (reception STA) may receive all or part of the PPDU through step S1510. The received signal may be in the form of fig. 10.

The sub-step of step S1510 may be determined based on step S1430 of fig. 14. That is, in step S1510, an operation of restoring the results of the CSD, the spatial mapping, the IDFT/IFFT operation, and the GI insertion operation applied in step S1430 may be performed.

In step S1520, the reception apparatus may perform decoding on all/part of the PPDU. In addition, the reception apparatus may obtain control information related to a tone plan (i.e., RU) from the decoded PPDU.

More specifically, the receiving apparatus may decode the L-SIG and the EHT-SIG of the PPDU based on the legacy STF/LTF and obtain information included in the L-SIG and EHT SIG fields. Information about various tone plans (i.e., RUs) described in the present specification may be included in the EHT-SIG, and the receiving STA may obtain information about the tone plans (i.e., RUs) through the EHT-SIG.

In step S1530, the reception apparatus may decode the remaining portion of the PPDU based on the information on the tone plan (i.e., RU) obtained through step S1520. For example, the receiving STA may decode the STF/LTF field of the PPDU based on information about one schedule (i.e., RU). In addition, the receiving STA may decode a data field of the PPDU based on information about a tone plan (i.e., RU) and obtain MPDUs included in the data field.

In addition, the reception apparatus may perform a processing operation of transmitting the data decoded through step S1530 to a higher layer (e.g., MAC layer). In addition, when generation of a signal is instructed from an upper layer to a PHY layer in response to data transmitted to the upper layer, a subsequent operation may be performed.

Hereinafter, the above-described embodiment will be described with reference to fig. 1 to 15.

Fig. 16 is a flowchart illustrating a procedure in which a transmitting STA transmits an a-PPDU according to this embodiment.

The example of fig. 16 may be performed in a network environment supporting a next generation WLAN system (IEEE 802.11be or EHT WLAN system). The next generation wireless LAN system is a WLAN system enhanced from the 802.11ax system, and thus can satisfy backward compatibility with the 802.11ax system.

The example of fig. 16 is performed by a transmitting Station (STA), and the transmitting STA may correspond to an Access Point (AP) STA. The receiving STA may correspond to a non-AP STA.

This embodiment proposes a method of applying sequence and preamble puncturing such that a receiving STA assigned to a secondary 160MHz channel through SST performs a unified operation in case that a transmitting STA transmits an a-PPDU. The a-PPDU may consist of a combination of the HE PPDU and the EHT PPDU, or may consist of only the EHT PPDU. This has the effect of allowing the receiving STA to perform a unified operation regardless of how the a-PPDUs are combined and transmitted.

In step S1610, a transmitting Station (STA) generates an aggregated physical protocol data unit (a-PPDU).

In step S1620, the transmitting STA transmits the A-PPDU to the receiving STA.

The a-PPDUs include a High Efficiency (HE) PPDU for a primary 160MHz channel and an Extremely High Throughput (EHT) PPDU for a secondary 160MHz channel. The first PPDU may be a High Efficiency (HE) PPDU or a first very high throughput (EHT) PPDU. The second PPDU may be a second EHT PPDU.

The receiving STAs are assigned to the secondary 160MHz channel through a sub-channel selective transmission (SST). That is, this embodiment assumes that SST is applied.

The first PPDU is transmitted based on a first sequence for 160MHz and a first preamble puncturing pattern for 160 MHz. The second PPDU is transmitted based on a second sequence for 160MHz and a second preamble puncturing pattern for 160 MHz.

That is, this embodiment proposes a method of always puncturing a preamble and a sequence for 160MHz application regardless of the type of the a-PPDU and bandwidths of the first PPDU and the second PPDU. As a result, the receiving STAs allocated to the secondary 160MHz channel through the SST can perform uniform (or identical) operations, thereby bringing implementation benefits.

The sequence and preamble puncturing for 160MHz may be defined as follows.

When the first PPDU is an HE PPDU, the HE PPDU may include a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal (L-SIG), a repeated legacy signal (RL-SIG) and a high efficiency signal (HE-SIG), a high efficiency short training field (HE-STF), a high efficiency long training field (HE-LTF), and a first data field.

The first sequence may include sequences for L-STF, L-LTF, L-SIG, RL-SIG, HE-STF, and HE-LTF at 160 MHz. The sequences of L-STF, L-LTF, L-SIG and RL-SIG for 160MHz correspond to the sequences defined in the conventional wireless LAN system, and the sequences of HE-SIG, HE-STF and HE-LTF for 160MHz may correspond to the sequences defined in the 802.11ax wireless LAN system.

The first preamble puncturing pattern may include first puncturing channel information for 160 MHz. The first foraminate channel information may be included in a Bandwidth (BW) field in the HE-SIG.

For example, when the value of the first puncturing channel information is set to 4, the secondary 20MHz channel may be punctured in the 80MHz channel. When the value of the first puncturing channel information is set to 5, one of two 20MHz sub-channels of the secondary 40MHz channel of the 80MHz channels may be punctured. When the value of the first puncturing channel information is set to 6, 0 to 2 20MHz sub-channels may be punctured in the secondary 80MHz channel and the secondary 20MHz channel among 160MHz or 80+80MHz channels. When the value of the first puncturing channel information is set to 7, 0, 1, or 2 20MHz sub-channels are punctured in a secondary 40MHz channel among 160MHz or 80+80MHz channels, 0 to 2 20MHz sub-channels may be punctured in the secondary 80MHz channel, and at this time, at least one 20MHz sub-channel may be punctured.

Based on the first puncture channel information, the first data field may be transmitted in a puncture channel.

When the first PPDU is a first EHT PPDU, the first and second EHT PPDUs may include L-STF, L-LTF, L-SIG, RL-SIG, universal signal (U-SIG), EHT-SIG, EHT-STF, EHT-LTF, and a second data field.

The first and second sequences may include sequences for 160MHz L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, EHT-STF, and EHT-LTF. The sequences of L-STF, L-LTF, L-SIG and RL-SIG for 160MHz correspond to sequences defined in a conventional wireless LAN system, and the sequences of U-SIG, EHT-STF and EHT-LTF for 160MHz may correspond to sequences defined in an 802.11be wireless LAN system.

The first and second preamble puncturing patterns may include second puncturing channel information for 160 MHz. The second puncture channel information may be included in a puncture channel information field in the U-SIG.

For example, when the a-PPDU is transmitted in a non-orthogonal frequency division multiple access (non-OFDMA) scheme, the second puncture channel information may be composed of 5 bits.

The secondary 160MHz channel may include first through eighth 20MHz subchannels. The first to eighth 20MHz subchannels may be arranged in order of low to high frequencies.

When the value of the second punctured channel information is 1, the first 20MHz sub-channel may be punctured in the secondary 160MHz channel (996+484+242-tones MRU 1). When the value of the second puncture channel information is 2, the second 20MHz sub-channel may be punctured in the secondary 160MHz channel (996+484+242-tone MRU 2). When the value of the second puncture channel information is 3, the third 20MHz sub-channel may be punctured in the secondary 160MHz channel (996+484+242-tone MRU 3). When the value of the second puncture channel information is 4, the fourth 20MHz sub-channel may be punctured in the secondary 160MHz channel (996+484+242-tone MRU 4). When the value of the second puncture channel information is 5, the fifth 20MHz subchannel may be punctured in the secondary 160MHz channel (996+484+242-tones MRU 5). When the value of the second puncture channel information is 6, the sixth 20MHz sub-channel may be punctured in the secondary 160MHz channel (996+484+242-tone MRU 6). When the value of the second puncture channel information is 7, the seventh 20MHz subchannel may be punctured in the secondary 160MHz channel (996+484+242-tone MRU 7). When the value of the second puncture channel information is 8, the eighth 20MHz subchannel may be punctured in the secondary 160MHz channel (996+484+242-tone MRU 8). When the value of the second puncture channel information is 9, the first and second 20MHz subchannels may be punctured in the secondary 160MHz channel (996+484-tone MRU 1). When the value of the second puncture channel information is 10, the third and fourth 20MHz subchannels may be punctured in the secondary 160MHz channel (996+484-tone MRU 2). When the value of the second puncture channel information is 11, the fifth and sixth 20MHz subchannels may be punctured in the secondary 160MHz channel (996 + 484-tone MRU 3). When the value of the second puncture channel information is 12, the seventh and eighth 20MHz subchannels may be punctured in the secondary 160MHz channel (996 + 484-tone MRU 4).

As another example, when the a-PPDU is transmitted in the OFDMA scheme, the secondary 160MHz channel may include first and second 80MHz subchannels. The first and second 80MHz subchannels may include first to fourth 20MHz subchannels.

The second puncture channel information may be comprised of a 4-bit bitmap for each of the first and second 80MHz subchannels.

The first and second 80MHz subchannels may be arranged in order of frequency from low to high. The first to fourth 20MHz subchannels may be arranged in order of low to high frequencies.

When the 4-bit bitmap is 0111, the first 20MHz subchannel may be punctured in the first or second 80MHz subchannel. The second 20MHz subchannel may be punctured in the first or second 80MHz subchannel when the 4 bit bitmap is 1011. When the 4 bit bitmap is 1101, the third 20MHz subchannel may be punctured in the first or second 80MHz subchannel. When the 4-bit bitmap is 1110, the fourth 20MHz subchannel may be punctured in the first or second 80MHz subchannel. When the 4-bit bitmap is 0011, the first and second 20MHz subchannels may be punctured in the first or second 80MHz subchannels. When the 4-bit bitmap is 1100, the third and fourth 20MHz subchannels may be punctured in the first or second 80MHz subchannels. The second and third 20MHz subchannels may be punctured in the first or second 80MHz subchannels when the 4 bit bitmap is 1001.

Based on the second puncture channel information, a second data field may be transmitted in the puncture channel.

In addition, the A-PPDU may also include an A-PPDU indicator indicating that it is an A-PPDU. This is because if the a-PPDU indicator is not present, an error may occur when the OBSS EHT STA, the unassociated EHT STA, or the dot11 ehtbaselinebreak implementedonly parameter is set to true EHT STA decodes the EHT PPDU transmitted on the primary 160MHz channel or the secondary 160MHz channel.

Fig. 17 is a flowchart illustrating a procedure in which a receiving STA receives an a-PPDU according to this embodiment.

The example of fig. 17 may be performed in a network environment supporting a next generation WLAN system (IEEE 802.11be or EHT WLAN system). The next generation wireless LAN system is a WLAN system enhanced from the 802.11ax system, and thus can satisfy backward compatibility with the 802.11ax system.

The example of fig. 17 is performed by a receiving Station (STA), and the receiving STA may correspond to a non-access point (non-AP) STA. The transmitting STA may correspond to an AP STA.

This embodiment proposes a method of applying sequence and preamble puncturing such that a receiving STA assigned to a secondary 160MHz channel through SST performs a unified operation in case that a transmitting STA transmits an a-PPDU. The a-PPDU may consist of a combination of the HE PPDU and the EHT PPDU, or may consist of only the EHT PPDU. This has the effect of allowing the receiving STA to perform a unified operation regardless of how the a-PPDUs are combined and transmitted.

In step S1710, a receiving Station (STA) receives an aggregated physical protocol data unit (a-PPDU) from a transmitting STA.

In step S1720, the receiving STA decodes the A-PPDU.

The a-PPDUs include a High Efficiency (HE) PPDU for a primary 160MHz channel and an Extremely High Throughput (EHT) PPDU for a secondary 160MHz channel. The first PPDU may be a High Efficiency (HE) PPDU or a first very high throughput (EHT) PPDU. The second PPDU may be a second EHT PPDU.

The receiving STAs are assigned to the secondary 160MHz channel through a sub-channel selective transmission (SST). That is, this embodiment assumes that SST is applied.

The first PPDU is transmitted based on a first sequence for 160MHz and a first preamble puncturing pattern for 160 MHz. The second PPDU is transmitted based on a second sequence for 160MHz and a second preamble puncturing pattern for 160 MHz.

That is, this embodiment proposes a method of always puncturing a preamble and a sequence for 160MHz application regardless of the type of the a-PPDU and bandwidths of the first PPDU and the second PPDU. As a result, the receiving STAs allocated to the secondary 160MHz channel through the SST can perform uniform (or identical) operations, thereby bringing implementation benefits.

The sequence and preamble puncturing for 160MHz may be defined as follows.

When the first PPDU is an HE PPDU, the HE PPDU may include a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal (L-SIG), a repeated legacy signal (RL-SIG) and a high efficiency signal (HE-SIG), a high efficiency short training field (HE-STF), a high efficiency long training field (HE-LTF), and a first data field.

The first sequence may include sequences for L-STF, L-LTF, L-SIG, RL-SIG, HE-STF, and HE-LTF at 160 MHz. The sequences of L-STF, L-LTF, L-SIG and RL-SIG for 160MHz correspond to the sequences defined in the conventional wireless LAN system, and the sequences of HE-SIG, HE-STF and HE-LTF for 160MHz may correspond to the sequences defined in the 802.11ax wireless LAN system.

The first preamble puncturing pattern may include first puncturing channel information for 160 MHz. The first foraminate channel information may be included in a Bandwidth (BW) field in the HE-SIG.

For example, when the value of the first puncturing channel information is set to 4, the secondary 20MHz channel may be punctured in the 80MHz channel. When the value of the first puncturing channel information is set to 5, one of two 20MHz sub-channels of the secondary 40MHz channel of the 80MHz channels may be punctured. When the value of the first puncturing channel information is set to 6, 0 to 2 20MHz sub-channels may be punctured in the secondary 80MHz channel and the secondary 20MHz channel among 160MHz or 80+80MHz channels. When the value of the first puncturing channel information is set to 7, 0, 1, or 2 20MHz sub-channels are punctured in a secondary 40MHz channel among 160MHz or 80+80MHz channels, 0 to 2 20MHz sub-channels may be punctured in the secondary 80MHz channel, and at this time, at least one 20MHz sub-channel may be punctured.

Based on the first puncture channel information, the first data field may be transmitted in a puncture channel.

When the first PPDU is a first EHT PPDU, the first and second EHT PPDUs may include L-STF, L-LTF, L-SIG, RL-SIG, universal signal (U-SIG), EHT-SIG, EHT-STF, EHT-LTF, and a second data field.

The first and second sequences may include sequences for 160MHz L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, EHT-STF, and EHT-LTF. The sequences of L-STF, L-LTF, L-SIG and RL-SIG for 160MHz correspond to sequences defined in a conventional wireless LAN system, and the sequences of U-SIG, EHT-STF and EHT-LTF for 160MHz may correspond to sequences defined in an 802.11be wireless LAN system.

The first and second preamble puncturing patterns may include second puncturing channel information for 160 MHz. The second puncture channel information may be included in a puncture channel information field in the U-SIG.

For example, when the a-PPDU is transmitted in a non-orthogonal frequency division multiple access (non-OFDMA) scheme, the second puncture channel information may be composed of 5 bits.

The secondary 160MHz channel may include first through eighth 20MHz subchannels. The first to eighth 20MHz subchannels may be arranged in order of low to high frequencies.

When the value of the second punctured channel information is 1, the first 20MHz sub-channel may be punctured in the secondary 160MHz channel (996+484+242-tones MRU 1). When the value of the second puncture channel information is 2, the second 20MHz sub-channel may be punctured in the secondary 160MHz channel (996+484+242-tone MRU 2). When the value of the second puncture channel information is 3, the third 20MHz sub-channel may be punctured in the secondary 160MHz channel (996+484+242-tone MRU 3). When the value of the second puncture channel information is 4, the fourth 20MHz sub-channel may be punctured in the secondary 160MHz channel (996+484+242-tone MRU 4). When the value of the second puncture channel information is 5, the fifth 20MHz subchannel may be punctured in the secondary 160MHz channel (996+484+242-tones MRU 5). When the value of the second puncture channel information is 6, the sixth 20MHz sub-channel may be punctured in the secondary 160MHz channel (996+484+242-tone MRU 6). When the value of the second puncture channel information is 7, the seventh 20MHz subchannel may be punctured in the secondary 160MHz channel (996+484+242-tone MRU 7). When the value of the second puncture channel information is 8, the eighth 20MHz subchannel may be punctured in the secondary 160MHz channel (996+484+242-tone MRU 8). When the value of the second puncture channel information is 9, the first and second 20MHz subchannels may be punctured in the secondary 160MHz channel (996+484-tone MRU 1). When the value of the second puncture channel information is 10, the third and fourth 20MHz subchannels may be punctured in the secondary 160MHz channel (996+484-tone MRU 2). When the value of the second puncture channel information is 11, the fifth and sixth 20MHz subchannels may be punctured in the secondary 160MHz channel (996 + 484-tone MRU 3). When the value of the second puncture channel information is 12, the seventh and eighth 20MHz subchannels may be punctured in the secondary 160MHz channel (996 + 484-tone MRU 4).

As another example, when the a-PPDU is transmitted in the OFDMA scheme, the secondary 160MHz channel may include first and second 80MHz subchannels. The first and second 80MHz subchannels may include first to fourth 20MHz subchannels.

The second puncture channel information may be comprised of a 4-bit bitmap for each of the first and second 80MHz subchannels.

The first and second 80MHz subchannels may be arranged in order of frequency from low to high. The first to fourth 20MHz subchannels may be arranged in order of low to high frequencies.

When the 4-bit bitmap is 0111, the first 20MHz subchannel may be punctured in the first or second 80MHz subchannel. The second 20MHz subchannel may be punctured in the first or second 80MHz subchannel when the 4 bit bitmap is 1011. When the 4 bit bitmap is 1101, the third 20MHz subchannel may be punctured in the first or second 80MHz subchannel. When the 4-bit bitmap is 1110, the fourth 20MHz subchannel may be punctured in the first or second 80MHz subchannel. When the 4-bit bitmap is 0011, the first and second 20MHz subchannels may be punctured in the first or second 80MHz subchannels. When the 4-bit bitmap is 1100, the third and fourth 20MHz subchannels may be punctured in the first or second 80MHz subchannels. The second and third 20MHz subchannels may be punctured in the first or second 80MHz subchannels when the 4 bit bitmap is 1001.

Based on the second puncture channel information, a second data field may be transmitted in the puncture channel.

In addition, the A-PPDU may also include an A-PPDU indicator indicating that it is an A-PPDU. This is because if the a-PPDU indicator is not present, an error may occur when the OBSS EHT STA, the unassociated EHT STA, or the dot11 ehtbaselinebreak implementedonly parameter is set to true EHT STA decodes the EHT PPDU transmitted on the primary 160MHz channel or the secondary 160MHz channel.

2. Device configuration

The technical features of the present disclosure may be applied to various apparatuses and methods. For example, the technical features of the present disclosure may be performed/supported by the apparatus of fig. 1 and/or 11. For example, the technical features of the present disclosure may be applied only to a portion of fig. 1 and/or 11. For example, the technical features of the present disclosure may be implemented based on the processing chips 114 and 124 of fig. 1, or based on the processors 111 and 121 and the memories 112 and 122, or based on the processor 610 and the memory 620 of fig. 11. For example, an apparatus according to the present disclosure receives an aggregated physical protocol data unit (a-PPDU) from a transmitting Station (STA); and decodes the a-PPDU.

The technical features of the present disclosure may be implemented based on a Computer Readable Medium (CRM). For example, CRM in accordance with the present disclosure is at least one computer-readable medium comprising instructions designed to be executed by at least one processor.

The CRM may store instructions to perform operations comprising: receiving an aggregated physical protocol data unit (a-PPDU) from a transmitting Station (STA); and decoding the A-PPDU. The at least one processor may execute instructions stored in the CRM according to the present disclosure. The at least one processor associated with CRM of the present disclosure may be the processors 111, 121 of fig. 1, the processing chips 114, 124 of fig. 1, or the processor 610 of fig. 11. Further, CRM of the present disclosure may be the memories 112, 122 of fig. 1, the memory 620 of fig. 11, or a separate external memory/storage medium/disk.

The foregoing features of the present specification are applicable to various applications or business models. For example, the foregoing features may be applied to wireless communications of an Artificial Intelligence (AI) -enabled device.

Artificial intelligence refers to a research field about artificial intelligence or a method for creating artificial intelligence, and machine learning refers to a research field about a method for defining and solving various problems in the artificial intelligence field. Machine learning is also defined as an algorithm that improves operational performance through a steady operational experience.

An Artificial Neural Network (ANN) is a model used in machine learning, and may refer to a model that solves a problem as a whole, including artificial neurons (nodes) that form a network by combining synapses. The artificial neural network may be defined by a connection pattern between neurons of different layers, a learning process to update model parameters, and an activation function to generate output values.

The artificial neural network may include an input layer, an output layer, and optionally one or more hidden layers. Each layer includes one or more neurons, and the artificial neural network may include synapses connecting the neurons. In an artificial neural network, each neuron may output a function value of an activation function of an input signal input through synapses, weights, and deviations.

Model parameters refer to parameters determined by learning and include weights of synaptic connections and deviations of neurons. Super-parameters refer to parameters to be set before learning in a machine learning algorithm and include learning rate, number of iterations, minimum batch size, and initialization function.

Learning the artificial neural network may be aimed at determining model parameters for minimizing the loss function. The loss function may be used as an index to determine optimal model parameters in learning the artificial neural network.

Machine learning can be classified into supervised learning, unsupervised learning, and reinforcement learning.

Supervised learning refers to a method of training an artificial neural network with labels given to training data, where when the training data is input to the artificial neural network, the labels may indicate correct answers (or result values) that the artificial neural network needs to infer. Unsupervised learning may refer to a method of training an artificial neural network without a tag given to training data. Reinforcement learning may refer to a training method for training agents defined in an environment to select actions or sequences of actions to maximize the jackpot per state.

Machine learning, which is implemented using a Deep Neural Network (DNN) including a plurality of hidden layers, among artificial neural networks is called deep learning, and deep learning is a part of machine learning. Hereinafter, machine learning is interpreted to include deep learning.

The foregoing technical features may be applied to wireless communication of a robot.

Robots may refer to machines that utilize their own capabilities to automatically process or operate a given task. In particular, a robot having a function of recognizing an environment and autonomously making a judgment to perform an operation may be referred to as an intelligent robot.

Robots can be classified into industrial, medical, home, military robots, etc., according to the purpose or field. The robot may include actuators or drives including motors to perform various physical operations, such as moving a robot joint. In addition, the movable robot may include wheels, brakes, propellers, etc. in the drive to travel on the ground or fly in the air by the drive.

The foregoing technical features may be applied to a device supporting augmented reality.

Augmented reality is collectively referred to as Virtual Reality (VR), augmented Reality (AR), and Mixed Reality (MR). VR technology is a computer graphics technology that provides real world objects and background only in CG images, AR technology is a computer graphics technology that provides virtual CG images on real object images, and MR technology is a computer graphics technology that provides virtual objects mixed and combined with the real world.

MR technology is similar to AR technology in that real and virtual objects can be displayed together. However, in the AR technique, a virtual object is used as a supplement to a real object, whereas in the MR technique, a virtual object and a real object are used as equivalent states.

XR technology may be applied to Head Mounted Displays (HMDs), head Up Displays (HUDs), mobile phones, tablets, laptops, desktop computers, televisions, digital signage, and the like. Devices that employ XR technology may be referred to as XR devices.

The claims disclosed in this specification may be combined in various ways. For example, the technical features in the method claims of the present specification may be combined to be implemented as a device, and the technical features in the device claims of the present specification may be combined to be implemented by a method. Furthermore, the technical features in the method claims and the apparatus claims of the present specification may be combined to be implemented as an apparatus, and the technical features in the method claims and the apparatus claims of the present specification may be combined to be implemented by a method.

Claims (20)

1. A method in a wireless local area network, WLAN, system, the method comprising the steps of:

Receiving, by a receiving station STA, an aggregated physical protocol data unit a-PPDU from a transmitting STA; and

decoding the a-PPDU by the receiving STA,

wherein the A-PPDU includes a first PPDU for a primary 160MHz channel and a second PPDU for a secondary 160MHz channel,

wherein the receiving STA is allocated to the secondary 160MHz channel by sub-channel selective transmission SST,

wherein the first PPDU is transmitted based on a first sequence for 160MHz and a first preamble puncturing pattern for 160MHz, and

wherein the second PPDU is transmitted based on a second sequence for 160MHz and a second preamble puncturing pattern for 160 MHz.

2. The method of claim 1, wherein the first PPDU is a high efficiency HE PPDU or a first very high throughput EHT PPDU,

wherein the second PPDU is a second EHT PPDU.

3. The method of claim 2, wherein when the first PPDU is the HE PPDU, the HE PPDU includes a legacy short training field L-STF, a legacy long training field L-LTF, a legacy signal L-SIG, a repeated legacy signal RL-SIG and a high efficiency signal HE-SIG, a high efficiency short training field HE-STF, a high efficiency long training field HE-LTF, and a first data field,

Wherein the first sequence comprises sequences for the L-STF, the L-LTF, the L-SIG, the RL-SIG, the HE-STF, and the HE-LTF at 160 MHz.

4. The method of claim 3, wherein the first preamble puncturing pattern includes first puncturing channel information for 160MHz,

wherein the first perforated channel information is included in a bandwidth BW field in the HE-SIG,

wherein the first data field is transmitted in a puncture channel based on the first puncture channel information.

5. The method of claim 2, wherein when the first PPDU is the first EHT PPDU, the first and second EHT PPDUs include L-STF, L-LTF, L-SIG, RL-SIG, general signal U-SIG, EHT-STF, EHT-LTF, and second data field,

wherein the first sequence and the second sequence include sequences for the L-STF, the L-LTF, the L-SIG, the RL-SIG, the U-SIG, the EHT-STF, and the EHT-LTF of 160 MHz.

6. The method of claim 5, wherein the first preamble puncturing pattern and the second preamble puncturing pattern include second puncturing channel information for 160MHz,

Wherein the second puncture channel information is included in a puncture channel information field in the U-SIG,

wherein the second data field is transmitted in a punctured channel based on the second punctured channel information.

7. The method of claim 6, wherein the second puncturing channel information consists of 5 bits when the a-PPDU is transmitted in a non-orthogonal frequency division multiple access scheme, i.e., non-OFDMA,

wherein the secondary 160MHz channel comprises first 20MHz sub-channel through eighth 20MHz sub-channel,

wherein the first 20MHz sub-channel to eighth 20MHz sub-channel are arranged in order of low to high frequencies,

wherein when the value of the second puncturing channel information is 1, a first 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein, when the value of the second puncturing channel information is 2, a second 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein when the value of the second puncturing channel information is 3, a third 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein, when the value of the second puncturing channel information is 4, a fourth 20MHz sub-channel is punctured in the secondary 160MHz channel,

Wherein when the value of the second puncturing channel information is 5, a fifth 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein, when the value of the second puncturing channel information is 6, a sixth 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein, when the value of the second puncturing channel information is 7, a seventh 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein when the value of the second puncturing channel information is 8, an eighth 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein when the value of the second puncturing channel information is 9, the first 20MHz sub-channel and the second 20MHz sub-channel are punctured in the secondary 160MHz channel,

wherein when the value of the second puncturing channel information is 10, a third 20MHz sub-channel and a fourth 20MHz sub-channel are punctured in the secondary 160MHz channel,

wherein when the value of the second puncturing channel information is 11, fifth 20MHz sub-channels and sixth 20MHz sub-channels are punctured in the secondary 160MHz channel,

wherein when the value of the second puncturing channel information is 12, a seventh 20MHz sub-channel and an eighth 20MHz sub-channel are punctured in the secondary 160MHz channel.

8. The method of claim 6, wherein the secondary 160MHz channel comprises a first 80MHz subchannel and a second 80MHz subchannel when the A-PPDU is transmitted in an OFDMA scheme,

wherein the first 80MHz sub-channel and the second 80MHz sub-channel comprise first 20MHz sub-channel to fourth 20MHz sub-channel,

wherein the second puncture channel information is comprised of a 4-bit bitmap for each of the first 80MHz sub-channel and the second 80MHz sub-channel,

wherein the first 80MHz sub-channel and the second 80MHz sub-channel are arranged in order of low to high frequencies,

wherein the first 20MHz sub-channel to the fourth 20MHz sub-channel are arranged in order of low to high frequencies,

wherein a first 20MHz sub-channel is punctured in either the first 80MHz sub-channel or the second 80MHz sub-channel when the 4 bit bitmap is 0111,

wherein a second 20MHz sub-channel is punctured in either the first 80MHz sub-channel or the second 80MHz sub-channel when the 4-bit bitmap is 1011,

wherein a third 20MHz sub-channel is punctured in either the first 80MHz sub-channel or the second 80MHz sub-channel when the 4-bit bitmap is 1101,

Wherein a fourth 20MHz sub-channel is punctured in either the first 80MHz sub-channel or the second 80MHz sub-channel when the 4-bit bitmap is 1110,

wherein, when the 4-bit bitmap is 0011, a first 20MHz subchannel and a second 20MHz subchannel are punctured in the first 80MHz subchannel or the second 80MHz subchannel,

wherein, when the 4-bit bitmap is 1100, a third 20MHz sub-channel and a fourth 20MHz sub-channel are punctured in the first 80MHz sub-channel or the second 80MHz sub-channel,

wherein, when the 4-bit bitmap is 1001, a second 20MHz subchannel and a third 20MHz subchannel are punctured in the first 80MHz subchannel or the second 80MHz subchannel.

9. A receiving station STA in a wireless local area network WLAN system, the receiving STA comprising:

a memory;

a transceiver; and

a processor operatively connected to the memory and the transceiver,

wherein the processor is configured to:

receiving an aggregated physical protocol data unit a-PPDU from a transmitting STA; and

the a-PPDU is decoded and,

wherein the A-PPDU includes a first PPDU for a primary 160MHz channel and a second PPDU for a secondary 160MHz channel,

Wherein the receiving STA is allocated to the secondary 160MHz channel by sub-channel selective transmission SST,

wherein the first PPDU is transmitted based on a first sequence for 160MHz and a first preamble puncturing pattern for 160MHz, and

wherein the second PPDU is transmitted based on a second sequence for 160MHz and a second preamble puncturing pattern for 160 MHz.

10. A method in a wireless local area network, WLAN, system, the method comprising the steps of:

generating an aggregated physical protocol data unit, a-PPDU, by a transmitting station, STA; and

the a-PPDU is transmitted by the transmitting STA to a receiving STA,

wherein the A-PPDU includes a first PPDU for a primary 160MHz channel and a second PPDU for a secondary 160MHz channel,

wherein the receiving STA is allocated to the secondary 160MHz channel by sub-channel selective transmission SST,

wherein the first PPDU is transmitted based on a first sequence for 160MHz and a first preamble puncturing pattern for 160MHz, and

wherein the second PPDU is transmitted based on a second sequence for 160MHz and a second preamble puncturing pattern for 160 MHz.

11. The method of claim 10, wherein the first PPDU is a high efficiency HE PPDU or a first very high throughput EHT PPDU,

Wherein the second PPDU is a second EHT PPDU.

12. The method of claim 11, wherein when the first PPDU is the HE PPDU, the HE PPDU includes a legacy short training field L-STF, a legacy long training field L-LTF, a legacy signal L-SIG, a repeated legacy signal RL-SIG and a high efficiency signal HE-SIG, a high efficiency short training field HE-STF, a high efficiency long training field HE-LTF, and a first data field,

wherein the first sequence comprises sequences for the L-STF, the L-LTF, the L-SIG, the RL-SIG, the HE-STF, and the HE-LTF at 160 MHz.

13. The method of claim 12, wherein the first preamble puncturing pattern includes first puncturing channel information for 160MHz,

wherein the first perforated channel information is included in a bandwidth BW field in the HE-SIG,

wherein the first data field is transmitted in a puncture channel based on the first puncture channel information.

14. The method of claim 11, wherein when the first PPDU is the first EHT PPDU, the first and second EHT PPDUs include L-STF, L-LTF, L-SIG, RL-SIG, general signal U-SIG, EHT-STF, EHT-LTF, and second data field,

Wherein the first sequence and the second sequence include sequences for the L-STF, the L-LTF, the L-SIG, the RL-SIG, the U-SIG, the EHT-STF, and the EHT-LTF of 160 MHz.

15. The method of claim 14, wherein the first and second preamble puncturing patterns comprise second puncturing channel information for 160MHz,

wherein the second puncture channel information is included in a puncture channel information field in the U-SIG,

wherein the second data field is transmitted in a punctured channel based on the second punctured channel information.

16. The method of claim 15, wherein the second puncturing channel information consists of 5 bits when the a-PPDU is transmitted in a non-orthogonal frequency division multiple access scheme, i.e., non-OFDMA,

wherein the secondary 160MHz channel comprises first 20MHz sub-channel through eighth 20MHz sub-channel,

wherein the first 20MHz sub-channel to the eighth 20MHz sub-channel are arranged in order of low to high frequencies,

wherein when the value of the second puncturing channel information is 1, a first 20MHz sub-channel is punctured in the secondary 160MHz channel,

Wherein, when the value of the second puncturing channel information is 2, a second 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein when the value of the second puncturing channel information is 3, a third 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein, when the value of the second puncturing channel information is 4, a fourth 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein when the value of the second puncturing channel information is 5, a fifth 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein, when the value of the second puncturing channel information is 6, a sixth 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein, when the value of the second puncturing channel information is 7, a seventh 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein when the value of the second puncturing channel information is 8, an eighth 20MHz sub-channel is punctured in the secondary 160MHz channel,

wherein when the value of the second puncturing channel information is 9, the first 20MHz sub-channel and the second 20MHz sub-channel are punctured in the secondary 160MHz channel,

wherein when the value of the second puncturing channel information is 10, a third 20MHz sub-channel and a fourth 20MHz sub-channel are punctured in the secondary 160MHz channel,

Wherein when the value of the second puncturing channel information is 11, fifth 20MHz sub-channels and sixth 20MHz sub-channels are punctured in the secondary 160MHz channel,

wherein when the value of the second puncturing channel information is 12, a seventh 20MHz sub-channel and an eighth 20MHz sub-channel are punctured in the secondary 160MHz channel.

17. The method of claim 15, wherein the secondary 160MHz channel comprises a first 80MHz subchannel and a second 80MHz subchannel when the A-PPDU is transmitted in an OFDMA scheme,

wherein the first 80MHz sub-channel and the second 80MHz sub-channel comprise first 20MHz sub-channel to fourth 20MHz sub-channel,

wherein the second puncture channel information is comprised of a 4-bit bitmap for each of the first 80MHz sub-channel and the second 80MHz sub-channel,

wherein the first 80MHz sub-channel and the second 80MHz sub-channel are arranged in order of low to high frequencies,

wherein the first 20MHz sub-channel to the fourth 20MHz sub-channel are arranged in order of low to high frequencies,

wherein a first 20MHz sub-channel is punctured in either the first 80MHz sub-channel or the second 80MHz sub-channel when the 4 bit bitmap is 0111,

Wherein a second 20MHz sub-channel is punctured in either the first 80MHz sub-channel or the second 80MHz sub-channel when the 4-bit bitmap is 1011,

wherein a third 20MHz sub-channel is punctured in either the first 80MHz sub-channel or the second 80MHz sub-channel when the 4-bit bitmap is 1101,

wherein a fourth 20MHz sub-channel is punctured in either the first 80MHz sub-channel or the second 80MHz sub-channel when the 4-bit bitmap is 1110,

wherein, when the 4-bit bitmap is 0011, a first 20MHz subchannel and a second 20MHz subchannel are punctured in the first 80MHz subchannel or the second 80MHz subchannel,

wherein, when the 4-bit bitmap is 1100, a third 20MHz sub-channel and a fourth 20MHz sub-channel are punctured in the first 80MHz sub-channel or the second 80MHz sub-channel,

wherein, when the 4-bit bitmap is 1001, a second 20MHz subchannel and a third 20MHz subchannel are punctured in the first 80MHz subchannel or the second 80MHz subchannel.

18. A transmitting station STA in a wireless local area network WLAN system, the transmitting STA comprising:

a memory;

a transceiver; and

a processor operatively connected to the memory and the transceiver,

Wherein the processor is configured to:

generating an aggregated physical protocol data unit A-PPDU; and

the a-PPDU is transmitted to a receiving STA,

wherein the A-PPDU includes a first PPDU for a primary 160MHz channel and a second PPDU for a secondary 160MHz channel,

wherein the receiving STA is allocated to the secondary 160MHz channel by sub-channel selective transmission SST,

wherein the first PPDU is transmitted based on a first sequence for 160MHz and a first preamble puncturing pattern for 160MHz, and

wherein the second PPDU is transmitted based on a second sequence for 160MHz and a second preamble puncturing pattern for 160 MHz.

19. A computer readable medium comprising instructions for execution by at least one processor and performing a method comprising:

receiving an aggregated physical protocol data unit a-PPDU from a transmitting station STA; and

the a-PPDU is decoded and,

wherein the A-PPDU includes a first PPDU for a primary 160MHz channel and a second PPDU for a secondary 160MHz channel,

wherein the receiving STA is allocated to the secondary 160MHz channel by sub-channel selective transmission SST,

wherein the first PPDU is transmitted based on a first sequence for 160MHz and a first preamble puncturing pattern for 160MHz, and

Wherein the second PPDU is transmitted based on a second sequence for 160MHz and a second preamble puncturing pattern for 160 MHz.

20. An apparatus in a wireless local area network, WLAN, system, the apparatus comprising:

a memory; and

a processor operatively connected to the memory,

wherein the processor is configured to:

receiving an aggregated physical protocol data unit a-PPDU from a transmitting station STA; and

the a-PPDU is decoded and,

wherein the A-PPDU includes a first PPDU for a primary 160MHz channel and a second PPDU for a secondary 160MHz channel,

wherein the receiving STA is allocated to the secondary 160MHz channel by sub-channel selective transmission SST,

wherein the first PPDU is transmitted based on a first sequence for 160MHz and a first preamble puncturing pattern for 160MHz, and

wherein the second PPDU is transmitted based on a second sequence for 160MHz and a second preamble puncturing pattern for 160 MHz.