WO2021112621A1 - Procédé de transmission de signal par perforation de préambule dans un système de communication sans fil - Google Patents

Procédé de transmission de signal par perforation de préambule dans un système de communication sans fil Download PDF

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WO2021112621A1
WO2021112621A1 PCT/KR2020/017644 KR2020017644W WO2021112621A1 WO 2021112621 A1 WO2021112621 A1 WO 2021112621A1 KR 2020017644 W KR2020017644 W KR 2020017644W WO 2021112621 A1 WO2021112621 A1 WO 2021112621A1
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information
mhz
field
ppdu
sig
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PCT/KR2020/017644
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English (en)
Korean (ko)
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임동국
천진영
최진수
박은성
김진민
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엘지전자 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present specification relates to a signal transmission technique through preamble puncturing in a WLAN system, and more particularly, to a method for transmitting information on preamble puncturing in multi-link communication and an apparatus supporting the same.
  • a wireless local area network has been improved in various ways.
  • the IEEE 802.11ax standard proposes an improved communication environment using OFDMA (orthogonal frequency division multiple access) and DL MU downlink multi-user multiple input, multiple output (MIMO) techniques.
  • OFDMA orthogonal frequency division multiple access
  • MIMO downlink multi-user multiple input, multiple output
  • the new communication standard may be the Extreme High Throughput (EHT) specification, which is being discussed recently.
  • the EHT standard may use a newly proposed increased bandwidth, an improved PHY layer protocol data unit (PPDU) structure, an improved sequence, a hybrid automatic repeat request (HARQ) technique, and the like.
  • the EHT standard may be referred to as an IEEE 802.11be standard.
  • a wide bandwidth eg, 160/320 MHz
  • 16 streams e.g., 16 streams
  • multi-link (or multi-band) operation may be used to support high throughput and high data rate.
  • the receiving STA receives a physical layer protocol data unit (PPDU) including a first signal field and a second signal field from the transmitting STA, wherein the first signal field is 80 MHz of the total bandwidth of the PPDU 4 bit information about the preamble puncturing pattern of the bandwidth, the 4 bit information includes first information on whether puncturing is applied in units of 20 MHz among the 80 MHz bandwidth, and the second signal field is including second information about the preamble puncturing pattern of the entire bandwidth; and decoding the PPDU based on the first signal field and the second signal field.
  • PPDU physical layer protocol data unit
  • the receiving STA may obtain information about the preamble puncturing pattern of the 80 MHz bandwidth among the entire bandwidth of the received PPDU, based on the first signal field. Accordingly, there is an effect that the receiving STA can quickly confirm that preamble puncturing is applied to the received PPDU.
  • the receiving STA may obtain information about the preamble puncturing pattern of the entire bandwidth of the PPDU based on the second signal field.
  • information about the preamble puncturing pattern may be transmitted through 4-bit information. Accordingly, there is an effect of reducing the overhead.
  • FIG. 1 shows an example of a transmitting apparatus and/or a receiving apparatus of the present specification.
  • WLAN wireless local area network
  • 3 is a view for explaining a general link setup process.
  • FIG. 4 is a diagram illustrating an example of a PPDU used in the IEEE standard.
  • FIG. 5 is a diagram illustrating an arrangement of resource units (RUs) used on a 20 MHz band.
  • FIG. 6 is a diagram illustrating an arrangement of a resource unit (RU) used on a 40 MHz band.
  • RU resource unit
  • FIG. 7 is a diagram illustrating an arrangement of a resource unit (RU) used on an 80 MHz band.
  • RU resource unit
  • FIG 9 shows an example in which a plurality of user STAs are allocated to the same RU through the MU-MIMO technique.
  • FIG. 11 shows an example of a trigger frame.
  • FIG. 13 shows an example of a subfield included in a per user information field.
  • 15 shows an example of a channel used/supported/defined in the 2.4 GHz band.
  • 16 shows an example of a channel used/supported/defined within the 5 GHz band.
  • FIG. 17 shows an example of a channel used/supported/defined within the 6 GHz band.
  • FIG. 19 shows a modified example of a transmitting apparatus and/or a receiving apparatus of the present specification.
  • FIG. 20 shows an example of a HE-PPDU.
  • 21 shows an example of an EHT PPDU.
  • 24 is a flowchart for explaining an operation of a transmitting STA.
  • 25 is a flowchart illustrating an operation of a receiving STA.
  • a or B (A or B) may mean “only A”, “only B”, or “both A and B”.
  • a or B (A or B)” in the present specification may be interpreted as “A and/or B (A and/or B)”.
  • A, B or C(A, B or C) herein means “only A”, “only B”, “only C”, or “any and any combination of A, B and C ( any combination of A, B and C)”.
  • a slash (/) or a comma (comma) may mean “and/or”.
  • A/B may mean “A and/or B”. Accordingly, “A/B” may mean “only A”, “only B”, or “both A and B”.
  • A, B, C may mean “A, B, or C”.
  • At least one of A and B may mean “only A”, “only B” or “both A and B”. Also, in the present specification, the expression “at least one of A or B” or “at least one of A and/or B” means “at least one of A and/or B”. It can be interpreted the same as "A and B (at least one of A and B)”.
  • At least one of A, B and C means “only A”, “only B”, “only C”, or “A, B and C” any combination of A, B and C”. Also, “at least one of A, B or C” or “at least one of A, B and/or C” means can mean “at least one of A, B and C”.
  • control information EHT-Signal
  • EHT-Signal when displayed as “control information (EHT-Signal)”, “EHT-Signal” may be proposed as an example of “control information”.
  • control information in the present specification is not limited to “EHT-Signal”, and “EHT-Signal” may be proposed as an example of "control information”.
  • EHT-signal even when displayed as “control information (ie, EHT-signal)”, “EHT-signal” may be proposed as an example of “control information”.
  • the following examples of the present specification may be applied to various wireless communication systems.
  • the following example of the present specification may be applied to a wireless local area network (WLAN) system.
  • the present specification may be applied to the IEEE 802.11a/g/n/ac standard or the IEEE 802.11ax standard.
  • this specification may be applied to a newly proposed EHT standard or IEEE 802.11be standard.
  • an example of the present specification may be applied to the EHT standard or a new wireless LAN standard that is an enhancement of IEEE 802.11be.
  • an example of the present specification may be applied to a mobile communication system.
  • LTE Long Term Evolution
  • 3GPP 3rd Generation Partnership Project
  • an example of the present specification may be applied to a communication system of the 5G NR standard based on the 3GPP standard.
  • FIG. 1 shows an example of a transmitting apparatus and/or a receiving apparatus of the present specification.
  • the example of FIG. 1 may perform various technical features described below.
  • 1 relates to at least one STA (station).
  • the STAs 110 and 120 of the present specification are a mobile terminal, a wireless device, a wireless transmit/receive unit (WTRU), a user equipment (UE), It may also be called by various names such as a mobile station (MS), a mobile subscriber unit, or simply a user.
  • the STAs 110 and 120 of the present specification may be referred to by various names such as a network, a base station, a Node-B, an access point (AP), a repeater, a router, and a relay.
  • the STAs 110 and 120 may be referred to by various names such as a receiving device (apparatus), a transmitting device, a receiving STA, a transmitting STA, a receiving device, and a transmitting device.
  • the STAs 110 and 120 may perform an access point (AP) role or a non-AP role. That is, the STAs 110 and 120 of the present specification may perform AP and/or non-AP functions.
  • the AP may also be indicated as an AP STA.
  • the STAs 110 and 120 of the present specification may support various communication standards other than the IEEE 802.11 standard.
  • a communication standard eg, LTE, LTE-A, 5G NR standard
  • the STA of the present specification may be implemented in various devices such as a mobile phone, a vehicle, and a personal computer.
  • the STA of the present specification may support communication for various communication services such as voice call, video call, data communication, and autonomous driving (Self-Driving, Autonomous-Driving).
  • the STAs 110 and 120 may include a medium access control (MAC) conforming to the IEEE 802.11 standard and a physical layer interface for a wireless medium.
  • MAC medium access control
  • the STAs 110 and 120 will be described based on the sub-drawing (a) of FIG. 1 as follows.
  • the first STA 110 may include a processor 111 , a memory 112 , and a transceiver 113 .
  • the illustrated processor, memory, and transceiver may each be implemented as separate chips, or at least two or more blocks/functions may be implemented through one chip.
  • the transceiver 113 of the first STA performs a signal transmission/reception operation. Specifically, IEEE 802.11 packets (eg, IEEE 802.11a/b/g/n/ac/ax/be, etc.) may be transmitted/received.
  • IEEE 802.11 packets eg, IEEE 802.11a/b/g/n/ac/ax/be, etc.
  • the first STA 110 may perform an intended operation of the AP.
  • the processor 111 of the AP may receive a signal through the transceiver 113 , process the received signal, generate a transmission signal, and perform control for signal transmission.
  • the memory 112 of the AP may store a signal (ie, a received signal) received through the transceiver 113 and may store a signal to be transmitted through the transceiver (ie, a transmission signal).
  • the second STA 120 may perform an intended operation of a Non-AP STA.
  • the transceiver 123 of the non-AP performs a signal transmission/reception operation.
  • IEEE 802.11 packets eg, IEEE 802.11a/b/g/n/ac/ax/be, etc.
  • IEEE 802.11a/b/g/n/ac/ax/be, etc. may be transmitted/received.
  • the processor 121 of the non-AP STA may receive a signal through the transceiver 123 , process the received signal, generate a transmission signal, and perform control for signal transmission.
  • the memory 122 of the non-AP STA may store a signal (ie, a received signal) received through the transceiver 123 and may store a signal (ie, a transmission signal) to be transmitted through the transceiver.
  • an operation of a device denoted as an AP in the following specification may be performed by the first STA 110 or the second STA 120 .
  • the operation of the device marked as AP is controlled by the processor 111 of the first STA 110 , and is controlled by the processor 111 of the first STA 110 .
  • Related signals may be transmitted or received via the controlled transceiver 113 .
  • control information related to an operation of the AP or a transmission/reception signal of the AP may be stored in the memory 112 of the first STA 110 .
  • the operation of the device indicated by the AP is controlled by the processor 121 of the second STA 120 and controlled by the processor 121 of the second STA 120 .
  • a related signal may be transmitted or received via the transceiver 123 .
  • control information related to an operation of the AP or a transmission/reception signal of the AP may be stored in the memory 122 of the second STA 110 .
  • an operation of a device indicated as a non-AP in the following specification may be performed by the first STA 110 or the second STA 120 .
  • the operation of the device marked as non-AP is controlled by the processor 121 of the second STA 120, and the processor ( A related signal may be transmitted or received via the transceiver 123 controlled by 121 .
  • control information related to the operation of the non-AP or the AP transmit/receive signal may be stored in the memory 122 of the second STA 120 .
  • the operation of the device marked as non-AP is controlled by the processor 111 of the first STA 110 , and the processor ( Related signals may be transmitted or received via transceiver 113 controlled by 111 .
  • control information related to the operation of the non-AP or the AP transmission/reception signal may be stored in the memory 112 of the first STA 110 .
  • transmission / reception STA STA, first STA, second STA, STA1, STA2, AP, first AP, second AP, AP1, AP2, (transmission / reception) Terminal, (transmission / reception) device , (transmission/reception) apparatus, network, and the like may refer to the STAs 110 and 120 of FIG. 1 .
  • a device indicated by a /receiver) device, a (transmit/receive) apparatus, and a network may also refer to the STAs 110 and 120 of FIG. 1 .
  • an operation in which various STAs transmit and receive signals may be performed by the transceivers 113 and 123 of FIG. 1 .
  • an operation in which various STAs generate a transmit/receive signal or perform data processing or calculation in advance for the transmit/receive signal may be performed by the processors 111 and 121 of FIG. 1 .
  • an example of an operation of generating a transmission/reception signal or performing data processing or operation in advance for a transmission/reception signal is 1) Determining bit information of a subfield (SIG, STF, LTF, Data) field included in a PPDU /Acquisition/configuration/computation/decoding/encoding operation, 2) time resource or frequency resource (eg, subcarrier resource) used for the subfield (SIG, STF, LTF, Data) field included in the PPDU, etc.
  • a specific sequence eg, pilot sequence, STF / LTF sequence, SIG
  • SIG subfield
  • SIG subfield
  • STF subfield
  • LTF LTF
  • Data subfield
  • an operation related to determination / acquisition / configuration / operation / decoding / encoding of the ACK signal may include
  • various information used by various STAs for determination/acquisition/configuration/computation/decoding/encoding of transmit/receive signals may be stored in the memories 112 and 122 of FIG. 1 .
  • the device/STA of the sub-view (a) of FIG. 1 described above may be modified as shown in the sub-view (b) of FIG. 1 .
  • the STAs 110 and 120 of the present specification will be described based on the sub-drawing (b) of FIG. 1 .
  • the transceivers 113 and 123 illustrated in (b) of FIG. 1 may perform the same function as the transceivers illustrated in (a) of FIG. 1 .
  • the processing chips 114 and 124 illustrated in (b) of FIG. 1 may include processors 111 and 121 and memories 112 and 122 .
  • the processors 111 and 121 and the memories 112 and 122 shown in (b) of FIG. 1 are the processors 111 and 121 and the memories 112 and 122 shown in (a) of FIG. ) can perform the same function.
  • a technical feature in which a transmitting STA transmits a control signal is that the control signals generated by the processors 111 and 121 shown in the sub-drawings (a)/(b) of FIG. 1 are (a) of FIG. ) / (b) can be understood as a technical feature transmitted through the transceivers 113 and 123 shown in (b).
  • the technical feature in which the transmitting STA transmits the control signal is a technical feature in which the control signal to be transmitted to the transceivers 113 and 123 is generated from the processing chips 114 and 124 shown in the sub-view (b) of FIG. can be understood
  • the technical feature in which the receiving STA receives the control signal may be understood as the technical feature in which the control signal is received by the transceivers 113 and 123 shown in the sub-drawing (a) of FIG. 1 .
  • the technical feature in which the receiving STA receives the control signal is that the control signal received by the transceivers 113 and 123 shown in the sub-drawing (a) of FIG. 1 is the processor shown in (a) of FIG. 111, 121) can be understood as a technical feature obtained by.
  • the technical feature for the receiving STA to receive the control signal is that the control signal received by the transceivers 113 and 123 shown in the sub-view (b) of FIG. 1 is the processing chip shown in the sub-view (b) of FIG. It can be understood as a technical feature obtained by (114, 124).
  • software codes 115 and 125 may be included in the memories 112 and 122 .
  • the software codes 115 and 125 may include instructions for controlling the operations of the processors 111 and 121 .
  • Software code 115, 125 may be included in a variety of programming languages.
  • the processors 111 and 121 or the processing chips 114 and 124 shown in FIG. 1 may include an application-specific integrated circuit (ASIC), other chipsets, logic circuits, and/or data processing devices.
  • the processor may be an application processor (AP).
  • the processors 111 and 121 or the processing chips 114 and 124 shown in FIG. 1 may include a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), and a modem (Modem). and demodulator).
  • DSP digital signal processor
  • CPU central processing unit
  • GPU graphics processing unit
  • Modem modem
  • demodulator demodulator
  • SNAPDRAGONTM series processor manufactured by Qualcomm®
  • EXYNOSTM series processor manufactured by Samsung®
  • a processor manufactured by Apple® It may be an A series processor, a HELIOTM series processor manufactured by MediaTek®, an ATOMTM series processor manufactured by INTEL®, or an enhanced processor.
  • the uplink may mean a link for communication from the non-AP STA to the AP STA, and an uplink PPDU/packet/signal may be transmitted through the uplink.
  • downlink may mean a link for communication from an AP STA to a non-AP STA, and a downlink PPDU/packet/signal may be transmitted through the downlink.
  • WLAN wireless local area network
  • FIG. 2 shows the structure of an infrastructure basic service set (BSS) of the Institute of Electrical and Electronic Engineers (IEEE) 802.11.
  • BSS infrastructure basic service set
  • IEEE Institute of Electrical and Electronic Engineers
  • a wireless LAN system may include one or more infrastructure BSSs 200 and 205 (hereinafter, BSSs).
  • BSSs 200 and 205 are a set of APs and STAs, such as an access point (AP) 225 and a station 200-1 (STA1) that can communicate with each other through successful synchronization, and are not a concept indicating a specific area.
  • the BSS 205 may include one or more combinable STAs 205 - 1 and 205 - 2 to one AP 230 .
  • the BSS may include at least one STA, the APs 225 and 230 providing a distribution service, and a distribution system (DS) 210 connecting a plurality of APs.
  • DS distribution system
  • the distributed system 210 may implement an extended service set (ESS) 240 that is an extended service set by connecting several BSSs 200 and 205 .
  • ESS 240 may be used as a term indicating one network in which one or several APs are connected through the distributed system 210 .
  • APs included in one ESS 240 may have the same service set identification (SSID).
  • the portal 220 may serve as a bridge connecting a wireless LAN network (IEEE 802.11) and another network (eg, 802.X).
  • IEEE 802.11 IEEE 802.11
  • 802.X another network
  • a network between the APs 225 and 230 and a network between the APs 225 and 230 and the STAs 200 - 1 , 205 - 1 and 205 - 2 may be implemented.
  • a network that establishes a network and performs communication even between STAs without the APs 225 and 230 is defined as an ad-hoc network or an independent basic service set (IBSS).
  • FIG. 2 The lower part of FIG. 2 is a conceptual diagram illustrating the IBSS.
  • the IBSS is a BSS operating in an ad-hoc mode. Since IBSS does not include an AP, there is no centralized management entity that performs a centralized management function. That is, in the IBSS, the STAs 250-1, 250-2, 250-3, 255-4, and 255-5 are managed in a distributed manner. In IBSS, all STAs (250-1, 250-2, 250-3, 255-4, 255-5) can be mobile STAs, and access to a distributed system is not allowed, so a self-contained network network) is formed.
  • 3 is a view for explaining a general link setup process.
  • the STA may perform a network discovery operation.
  • the network discovery operation may include a scanning operation of the STA. That is, in order for the STA to access the network, it must find a network in which it can participate. An STA must identify a compatible network before participating in a wireless network. The process of identifying a network existing in a specific area is called scanning. Scanning methods include active scanning and passive scanning.
  • an STA performing scanning transmits a probe request frame to discover which APs exist around it while moving channels, and waits for a response.
  • a responder transmits a probe response frame in response to the probe request frame to the STA that has transmitted the probe request frame.
  • the responder may be the STA that last transmitted a beacon frame in the BSS of the channel being scanned.
  • the AP since the AP transmits a beacon frame, the AP becomes the responder.
  • the STAs in the IBSS rotate and transmit the beacon frame, so the responder is not constant.
  • an STA that transmits a probe request frame on channel 1 and receives a probe response frame on channel 1 stores BSS-related information included in the received probe response frame and channel) to perform scanning (ie, probe request/response transmission/reception on channel 2) in the same way.
  • the scanning operation may be performed in a passive scanning manner.
  • An STA performing scanning based on passive scanning may wait for a beacon frame while moving channels.
  • the beacon frame is one of the management frames in IEEE 802.11, and is periodically transmitted to inform the existence of a wireless network, and to allow a scanning STA to search for a wireless network and participate in the wireless network.
  • the AP plays a role of periodically transmitting a beacon frame, and in the IBSS, the STAs in the IBSS rotate and transmit the beacon frame.
  • the STA performing the scanning receives the beacon frame, it stores information on the BSS included in the beacon frame and records the beacon frame information in each channel while moving to another channel.
  • the STA may store BSS-related information included in the received beacon frame, move to the next channel, and perform scanning on the next channel in the same manner.
  • the STA discovering the network may perform an authentication process through step S320.
  • This authentication process may be referred to as a first authentication process in order to clearly distinguish it from the security setup operation of step S340 to be described later.
  • the authentication process of S320 may include a process in which the STA transmits an authentication request frame to the AP, and in response thereto, the AP transmits an authentication response frame to the STA.
  • An authentication frame used for an authentication request/response corresponds to a management frame.
  • the authentication frame includes an authentication algorithm number, an authentication transaction sequence number, a status code, a challenge text, a Robust Security Network (RSN), and a Finite Cyclic Group), etc. may be included.
  • RSN Robust Security Network
  • Finite Cyclic Group Finite Cyclic Group
  • the STA may transmit an authentication request frame to the AP.
  • the AP may determine whether to allow authentication for the corresponding STA based on information included in the received authentication request frame.
  • the AP may provide the result of the authentication process to the STA through the authentication response frame.
  • the successfully authenticated STA may perform a connection process based on step S330.
  • the association process includes a process in which the STA transmits an association request frame to the AP, and in response, the AP transmits an association response frame to the STA.
  • the connection request frame includes information related to various capabilities, a beacon listening interval, a service set identifier (SSID), supported rates, supported channels, RSN, and a mobility domain.
  • SSID service set identifier
  • supported rates supported channels
  • RSN radio station
  • a mobility domain a mobility domain.
  • supported operating classes TIM broadcast request (Traffic Indication Map Broadcast request), interworking service capability, and the like may include information.
  • connection response frame includes information related to various capabilities, status codes, Association IDs (AIDs), support rates, Enhanced Distributed Channel Access (EDCA) parameter sets, Received Channel Power Indicator (RCPI), Received Signal to Noise (RSNI). indicator), mobility domain, timeout interval (association comeback time), overlapping BSS scan parameters, TIM broadcast response, QoS map, and the like.
  • AIDs Association IDs
  • EDCA Enhanced Distributed Channel Access
  • RCPI Received Channel Power Indicator
  • RSNI Received Signal to Noise
  • indicator mobility domain
  • timeout interval association comeback time
  • overlapping BSS scan parameters TIM broadcast response
  • QoS map QoS map
  • step S340 the STA may perform a security setup process.
  • the security setup process of step S340 may include, for example, a process of private key setup through 4-way handshaking through an Extensible Authentication Protocol over LAN (EAPOL) frame. .
  • EAPOL Extensible Authentication Protocol over LAN
  • FIG. 4 is a diagram illustrating an example of a PPDU used in the IEEE standard.
  • the LTF and STF fields include training signals
  • SIG-A and SIG-B include control information for the receiving station
  • the data field includes user data corresponding to MAC PDU/Aggregated MAC PDU (PSDU). included
  • the HE PPDU according to FIG. 4 is an example of a PPDU for multiple users.
  • HE-SIG-B may be included only for multiple users, and the corresponding HE-SIG-B may be omitted from the PPDU for a single user.
  • HE-PPDU for multiple users is L-STF (legacy-short training field), L-LTF (legacy-long training field), L-SIG (legacy-signal), HE-SIG-A (high efficiency-signal A), HE-SIG-B (high efficiency-signal-B), HE-STF (high efficiency-short training field), HE-LTF (high efficiency-long training field) , a data field (or MAC payload) and a packet extension (PE) field.
  • Each field may be transmitted during the illustrated time interval (ie, 4 or 8 ⁇ s, etc.).
  • a resource unit may include a plurality of subcarriers (or tones).
  • the resource unit may be used when transmitting a signal to a plurality of STAs based on the OFDMA technique.
  • a resource unit may be defined even when a signal is transmitted to one STA.
  • the resource unit may be used for STF, LTF, data field, and the like.
  • FIG. 5 is a diagram illustrating an arrangement of resource units (RUs) used on a 20 MHz band.
  • resource units corresponding to different numbers of tones (ie, subcarriers) may be used to configure some fields of the HE-PPDU.
  • resources may be allocated in units of RUs shown for HE-STF, HE-LTF, and data fields.
  • 26-units ie, units corresponding to 26 tones
  • Six tones may be used as a guard band in the leftmost band of the 20 MHz band
  • 5 tones may be used as a guard band in the rightmost band of the 20 MHz band.
  • 7 DC tones are inserted into the center band, that is, the DC band
  • 26-units corresponding to each of 13 tones may exist on the left and right sides of the DC band.
  • 26-units, 52-units, and 106-units may be allocated to other bands.
  • Each unit may be assigned for a receiving station, ie a user.
  • the RU arrangement of FIG. 5 is utilized not only in a situation for a plurality of users (MU), but also in a situation for a single user (SU).
  • MU plurality of users
  • SU single user
  • one 242-unit is used. It is possible to use and in this case 3 DC tones can be inserted.
  • RUs of various sizes ie, 26-RU, 52-RU, 106-RU, 242-RU, etc.
  • this embodiment is not limited to the specific size of each RU (ie, the number of corresponding tones).
  • FIG. 6 is a diagram illustrating an arrangement of a resource unit (RU) used on a 40 MHz band.
  • RU resource unit
  • RUs of various sizes are used, in the example of FIG. 6, 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, etc. may be used.
  • 5 DC tones can be inserted into the center frequency, 12 tones are used as a guard band in the leftmost band of the 40MHz band, and 11 tones are used in the rightmost band of the 40MHz band. This can be used as a guard band.
  • 484-RU when used for a single user, 484-RU may be used. Meanwhile, the fact that the specific number of RUs can be changed is the same as the example of FIG. 4 .
  • FIG. 7 is a diagram illustrating an arrangement of a resource unit (RU) used on an 80 MHz band.
  • RU resource unit
  • RUs of various sizes are used, in the example of FIG. 7, 26-RU, 52-RU, 106-RU, 242-RU, 484-RU, 996-RU, etc. may be used. have.
  • 7 DC tones can be inserted into the center frequency, 12 tones are used as a guard band in the leftmost band of the 80MHz band, and 11 tones are used in the rightmost band of the 80MHz band. This can be used as a guard band.
  • 26-RU using 13 tones located on the left and right of the DC band can be used.
  • 996-RU when used for a single user, 996-RU may be used, and in this case, 5 DC tones may be inserted.
  • the RU described in this specification may be used for uplink (UL) communication and downlink (DL) communication.
  • a transmitting STA eg, AP
  • a first RU eg, 26/52/106
  • a second RU eg, 26/52/106/242-RU, etc.
  • the first STA may transmit a first trigger-based PPDU based on the first RU
  • 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 in the same time interval.
  • the transmitting STA (eg, AP) allocates a first RU (eg, 26/52/106/242-RU, etc.) to the first STA, and A second RU (eg, 26/52/106/242-RU, etc.) may be allocated to the 2 STAs. That is, the transmitting STA (eg, AP) may transmit the HE-STF, HE-LTF, and Data fields for the first STA through the first RU within one MU PPDU, and the second through the second RU. HE-STF, HE-LTF, and Data fields for 2 STAs may be transmitted.
  • HE-SIG-B Information on the arrangement of the RU may be signaled through HE-SIG-B.
  • the HE-SIG-B field 810 includes a common field 820 and a user-specific field 830 .
  • the common field 820 may include information commonly applied to all users (ie, user STAs) receiving SIG-B.
  • the user-individual field 830 may be referred to as a user-individual control field.
  • the user-individual field 830 may be applied only to some of the plurality of users when the SIG-B is delivered to a plurality of users.
  • the common field 820 and the user-individual field 830 may be encoded separately.
  • the common field 820 may include N*8 bits of RU allocation information.
  • the RU allocation information may include information about the location of the RU. For example, when a 20 MHz channel is used as shown in FIG. 5, the RU allocation information may include information on which RU (26-RU/52-RU/106-RU) is disposed in which frequency band. .
  • a maximum of nine 26-RUs may be allocated to a 20 MHz channel.
  • Table 1 when the RU allocation information of the common field 820 is set to "00000000", nine 26-RUs may be allocated to a corresponding channel (ie, 20 MHz).
  • Table 1 when the RU allocation information of the common field 820 is set to "00000001”, seven 26-RUs and one 52-RU are arranged in a corresponding channel. That is, in the example of FIG. 5 , 52-RUs may be allocated to the rightmost side, and seven 26-RUs may be allocated to the left side thereof.
  • Table 1 shows only some of the RU locations that can be indicated by the RU allocation information.
  • the RU allocation information may include an example of Table 2 below.
  • "01000y2y1y0" relates to an example in which 106-RU is allocated to the leftmost side of a 20 MHz channel and 5 26-RUs are allocated to the right side thereof.
  • a plurality of STAs eg, User-STAs
  • a maximum of 8 STAs eg, User-STAs
  • the number of STAs eg, User-STAs allocated to the 106-RU is 3-bit information (y2y1y0).
  • the number of STAs (eg, User-STAs) allocated to the 106-RU based on the MU-MIMO technique may be N+1.
  • a plurality of different STAs may be allocated to a plurality of RUs.
  • a plurality of STAs may be allocated to one RU of a specific size (eg, 106 subcarriers) or more based on the MU-MIMO technique.
  • the user-individual field 830 may include a plurality of user fields.
  • the number of STAs (eg, user STAs) allocated to a specific channel may be determined based on the RU allocation information of the common field 820 . For example, when the RU allocation information of the common field 820 is “00000000”, one user STA may be allocated to each of the nine 26-RUs (that is, a total of nine user STAs are allocated). That is, a maximum of 9 user STAs may be allocated to a specific channel through the OFDMA technique. In other words, up to 9 user STAs may be allocated to a specific channel through the non-MU-MIMO technique.
  • RU allocation when the RU allocation is set to "01000y2y1y0", a plurality of user STAs are allocated to the 106-RU disposed on the leftmost side through the MU-MIMO technique, and five 26-RUs disposed on the right side have Five user STAs may be allocated through the non-MU-MIMO technique. This case is embodied through an example of FIG. 9 .
  • FIG 9 shows an example in which a plurality of user STAs are allocated to the same RU through the MU-MIMO technique.
  • RU allocation is set to "01000010" as shown in FIG. 9, based on Table 2, 106-RU is allocated to the leftmost side of a specific channel, and 5 26-RUs are allocated to the right side.
  • a total of three user STAs may be allocated to the 106-RU through the MU-MIMO technique.
  • the user-individual field 830 of HE-SIG-B may include 8 User fields.
  • Eight user fields may be included in the order shown in FIG. 9 . Also, as shown in FIG. 8 , two user fields may be implemented as one user block field.
  • the User field shown in FIGS. 8 and 9 may be configured based on two formats. That is, the user field related to the MU-MIMO technique may be configured in the first format, and the user field related to the non-MU-MIMO technique may be configured in the second format.
  • User fields 1 to 3 may be based on a first format
  • User fields 4 to 8 may be based on a second format.
  • the first format or the second format may include bit information of the same length (eg, 21 bits).
  • Each user field may have the same size (eg, 21 bits).
  • the user field of the first format (the format of the MU-MIMO technique) may be configured as follows.
  • the first bit (eg, B0-B10) in the user field is identification information of the user STA to which the corresponding user field is allocated (eg, STA-ID, partial AID, etc.) may include.
  • the second bit (eg, B11-B14) in the user field may include information about spatial configuration.
  • examples of the second bits may be as shown in Tables 3 to 4 below.
  • information about the number of spatial streams for a user STA may consist of 4 bits.
  • information on the number of spatial streams (ie, second bits, B11-B14) for a user STA may support up to 8 spatial streams.
  • information on the number of spatial streams (ie, the second bit, B11-B14) may support up to four spatial streams for one user STA.
  • the third bit (ie, B15-18) in the user field (ie, 21 bits) may include modulation and coding scheme (MCS) information.
  • MCS modulation and coding scheme
  • the MCS information may be applied to a data field in the PPDU including the corresponding SIG-B.
  • MCS MCS information
  • MCS index MCS field, etc. used in this specification may be indicated by a specific index value.
  • MCS information may be indicated by index 0 to index 11.
  • MCS information includes information about a constellation modulation type (eg, BPSK, QPSK, 16-QAM, 64-QAM, 256-QAM, 1024-QAM, etc.), and a coding rate (eg, 1/2, 2/ 3, 3/4, 5/6, etc.).
  • a channel coding type eg, BCC or LDPC
  • the fourth bit (ie, B19) in the User field (ie, 21 bits) may be a Reserved field.
  • a fifth bit (ie, B20) in the user field may include information about a coding type (eg, BCC or LDPC). That is, the fifth bit (ie, B20) may include information on the type of channel coding (eg, BCC or LDPC) applied to the data field in the PPDU including the corresponding SIG-B.
  • a coding type eg, BCC or LDPC
  • the above-described example relates to the User Field of the first format (the format of the MU-MIMO technique).
  • An example of the user field of the second format (a format of the non-MU-MIMO technique) is as follows.
  • the first bit (eg, B0-B10) in the user field of the second format may include identification information of the user STA.
  • the second bit (eg, B11-B13) in the user field of the second format may include information about the number of spatial streams applied to the corresponding RU.
  • the third bit (eg, B14) in the user field of the second format may include information on whether a beamforming steering matrix is applied.
  • a fourth bit (eg, B15-B18) in the user field of the second format may include modulation and coding scheme (MCS) information.
  • a fifth bit (eg, B19) in the user field of the second format may include information on whether Dual Carrier Modulation (DCM) is applied.
  • the sixth bit (ie, B20) in the user field of the second format may include information about a coding type (eg, BCC or LDPC).
  • the transmitting STA may perform channel access through contending (ie, backoff operation) and transmit a trigger frame 1030 . That is, the transmitting STA (eg, AP) may transmit the PPDU including the Trigger Frame 1330 .
  • a TB (trigger-based) PPDU is transmitted after a delay of SIFS.
  • the TB PPDUs 1041 and 1042 are transmitted in the same time zone, and may be transmitted from a plurality of STAs (eg, user STAs) in which AIDs are indicated in the trigger frame 1030 .
  • the ACK frame 1050 for the TB PPDU may be implemented in various forms.
  • an orthogonal frequency division multiple access (OFDMA) technique or MU MIMO technique may be used, and OFDMA and MU MIMO technique may be used simultaneously.
  • OFDMA orthogonal frequency division multiple access
  • the trigger frame of FIG. 11 allocates resources for uplink multiple-user transmission (MU), and may be transmitted, for example, from an AP.
  • the trigger frame may be composed of a MAC frame and may be included in a PPDU.
  • Each field shown in FIG. 11 may be partially omitted, and another field may be added. Also, the length of each field may be changed differently from that shown.
  • the frame control field 1110 of FIG. 11 includes information about the version of the MAC protocol and other additional control information, and the duration field 1120 includes time information for NAV setting or an STA identifier (eg, For example, information about AID) may be included.
  • the RA field 1130 includes address information of the receiving STA of the corresponding trigger frame, and may be omitted if necessary.
  • the TA field 1140 includes address information of an STA (eg, AP) that transmits the trigger frame
  • the common information field 1150 is a common information field applied to the receiving STA that receives the trigger frame.
  • a field indicating the length of the L-SIG field of the uplink PPDU transmitted in response to the trigger frame or the SIG-A field (ie, HE-SIG-A) in the uplink PPDU transmitted in response to the trigger frame. field) may include information controlling the content.
  • common control information information on the length of the CP of the uplink PPDU transmitted in response to the trigger frame or information on the length of the LTF field may be included.
  • per user information fields 1160#1 to 1160#N corresponding to the number of receiving STAs receiving the trigger frame of FIG. 11 .
  • the individual user information field may be referred to as an “allocation field”.
  • the trigger frame of FIG. 11 may include a padding field 1170 and a frame check sequence field 1180 .
  • Each of the per user information fields 1160#1 to 1160#N shown in FIG. 11 may again include a plurality of subfields.
  • FIG. 12 shows an example of a common information field of a trigger frame. Some of the subfields of FIG. 12 may be omitted, and other subfields may be added. Also, the length of each subfield shown may be changed.
  • the illustrated length field 1210 has the same value as the length field of the L-SIG field of the uplink PPDU transmitted in response to the trigger frame, and the length field of the L-SIG field of the uplink PPDU indicates the length of the uplink PPDU.
  • the length field 1210 of the trigger frame may be used to indicate the length of the corresponding uplink PPDU.
  • the cascade indicator field 1220 indicates whether a cascade operation is performed.
  • the cascade operation means that downlink MU transmission and uplink MU transmission are performed together in the same TXOP. That is, after downlink MU transmission is performed, it means that uplink MU transmission is performed after a preset time (eg, SIFS).
  • a preset time eg, SIFS.
  • the CS request field 1230 indicates whether the state of the radio medium or NAV should be considered in a situation in which the receiving device receiving the corresponding trigger frame transmits the corresponding uplink PPDU.
  • the HE-SIG-A information field 1240 may include information for controlling the content of the SIG-A field (ie, the HE-SIG-A field) of the uplink PPDU transmitted in response to the corresponding trigger frame.
  • the CP and LTF type field 1250 may include information on the LTF length and CP length of the uplink PPDU transmitted in response to the corresponding trigger frame.
  • the trigger type field 1060 may indicate a purpose for which the corresponding trigger frame is used, for example, normal triggering, triggering for beamforming, a request for Block ACK/NACK, and the like.
  • the trigger type field 1260 of the trigger frame indicates a basic type trigger frame for normal triggering.
  • a basic type trigger frame may be referred to as a basic trigger frame.
  • the user information field 1300 of FIG. 13 shows an example of a subfield included in a per user information field.
  • the user information field 1300 of FIG. 13 may be understood as any one of the individual user information fields 1160#1 to 1160#N mentioned in FIG. 11 above. Some of the subfields included in the user information field 1300 of FIG. 13 may be omitted, and other subfields may be added. Also, the length of each subfield shown may be changed.
  • a User Identifier field 1310 of FIG. 13 indicates an identifier of an STA (ie, a receiving STA) corresponding to per user information, and an example of the identifier is an association identifier (AID) of the receiving STA. It can be all or part of a value.
  • an RU Allocation field 1320 may be included. That is, when the receiving STA identified by the user identifier field 1310 transmits the TB PPDU in response to the trigger frame, it transmits the TB PPDU through the RU indicated by the RU allocation field 1320 .
  • the RU indicated by the RU Allocation field 1320 may be the RU shown in FIGS. 5, 6, and 7 .
  • the subfield of FIG. 13 may include a coding type field 1330 .
  • the coding type field 1330 may indicate the coding type of the TB PPDU. For example, when BCC coding is applied to the TB PPDU, the coding type field 1330 is set to '1', and when LDPC coding is applied, the coding type field 1330 can be set to '0'. have.
  • the subfield of FIG. 13 may include an MCS field 1340 .
  • the MCS field 1340 may indicate an MCS technique applied to a TB PPDU. For example, when BCC coding is applied to the TB PPDU, the coding type field 1330 is set to '1', and when LDPC coding is applied, the coding type field 1330 can be set to '0'. have.
  • the transmitting STA may allocate 6 RU resources as shown in FIG. 14 through a trigger frame.
  • the AP is a first RU resource (AID 0, RU 1), a second RU resource (AID 0, RU 2), a third RU resource (AID 0, RU 3), a fourth RU resource (AID 2045, RU) 4), a fifth RU resource (AID 2045, RU 5), and a sixth RU resource (AID 3, RU 6) may be allocated.
  • Information on AID 0, AID 3, or AID 2045 may be included, for example, in the user identification field 1310 of FIG. 13 .
  • Information on RU 1 to RU 6 may be included in, for example, the RU allocation field 1320 of FIG. 13 .
  • the first to third RU resources of FIG. 14 may be used as UORA resources for an associated STA
  • the fourth to fifth RU resources of FIG. 14 are non-associated for STAs. It may be used as a UORA resource
  • the sixth RU resource of FIG. 14 may be used as a resource for a normal UL MU.
  • the OFDMA random access BackOff (OBO) counter of STA1 is decreased to 0, and STA1 randomly selects the second RU resources (AID 0, RU 2).
  • OBO counter of STA2/3 is greater than 0, uplink resources are not allocated to STA2/3.
  • STA1 of FIG. 14 is an associated STA, there are a total of three eligible RA RUs for STA1 (RU 1, RU 2, RU 3), and accordingly, STA1 decrements the OBO counter by 3 to increase the OBO counter. became 0.
  • STA2 in FIG. 14 is an associated STA, there are a total of three eligible RA RUs for STA2 (RU 1, RU 2, RU 3), and accordingly, STA2 decrements the OBO counter by 3, but the OBO counter is 0. is in a larger state.
  • STA3 of FIG. 14 is an un-associated STA, the eligible RA RUs for STA3 are two (RU 4, RU 5) in total, and accordingly, STA3 decrements the OBO counter by 2, but the OBO counter is is greater than 0.
  • 15 shows an example of a channel used/supported/defined in the 2.4 GHz band.
  • the 2.4 GHz band may be referred to as another name such as a first band (band). Also, the 2.4 GHz band may mean a frequency region in which channels having a center frequency adjacent to 2.4 GHz (eg, channels having a center frequency within 2.4 to 2.5 GHz) are used/supported/defined.
  • the 2.4 GHz band may contain multiple 20 MHz channels.
  • 20 MHz in the 2.4 GHz band may have multiple channel indices (eg, indices 1 to 14).
  • a center frequency of a 20 MHz channel to which channel index 1 is allocated may be 2.412 GHz
  • a center frequency of a 20 MHz channel to which channel index 2 is allocated may be 2.417 GHz
  • 20 MHz to which channel index N is allocated may be allocated.
  • the center frequency of the channel may be (2.407 + 0.005*N) GHz.
  • the channel index may be called by various names such as a channel number. Specific values of the channel index and center frequency may be changed.
  • the illustrated first frequency region 1510 to fourth frequency region 1540 may each include one channel.
  • the first frequency domain 1510 may include channel 1 (a 20 MHz channel having index 1).
  • the center frequency of channel 1 may be set to 2412 MHz.
  • the second frequency region 1520 may include channel 6 .
  • the center frequency of channel 6 may be set to 2437 MHz.
  • the third frequency domain 1530 may include channel 11 .
  • the center frequency of channel 11 may be set to 2462 MHz.
  • the fourth frequency domain 1540 may include channel 14. In this case, the center frequency of channel 14 may be set to 2484 MHz.
  • 16 shows an example of a channel used/supported/defined within the 5 GHz band.
  • the 5 GHz band may be referred to as another name such as a second band/band.
  • the 5 GHz band may mean a frequency region in which channels having a center frequency of 5 GHz or more and less than 6 GHz (or less than 5.9 GHz) are used/supported/defined.
  • the 5 GHz band may include a plurality of channels between 4.5 GHz and 5.5 GHz. The specific numerical values shown in FIG. 16 may be changed.
  • the plurality of channels in the 5 GHz band include UNII (Unlicensed National Information Infrastructure)-1, UNII-2, UNII-3, and ISM.
  • UNII-1 may be referred to as UNII Low.
  • UNII-2 may include a frequency domain called UNII Mid and UNII-2Extended.
  • UNII-3 may be referred to as UNII-Upper.
  • a plurality of channels may be configured within the 5 GHz band, and the bandwidth of each channel may be variously configured such as 20 MHz, 40 MHz, 80 MHz, or 160 MHz.
  • the 5170 MHz to 5330 MHz frequency region/range in UNII-1 and UNII-2 may be divided into eight 20 MHz channels.
  • the 5170 MHz to 5330 MHz frequency domain/range may be divided into 4 channels through the 40 MHz frequency domain.
  • the 5170 MHz to 5330 MHz frequency domain/range may be divided into two channels through the 80 MHz frequency domain.
  • the 5170 MHz to 5330 MHz frequency domain/range may be divided into one channel through the 160 MHz frequency domain.
  • FIG. 17 shows an example of a channel used/supported/defined within the 6 GHz band.
  • the 6 GHz band may be referred to as another name such as a third band/band.
  • the 6 GHz band may mean a frequency region in which channels having a center frequency of 5.9 GHz or higher are used/supported/defined.
  • the specific numerical values shown in FIG. 17 may be changed.
  • the 20 MHz channel of FIG. 17 may be defined from 5.940 GHz.
  • the leftmost channel among the 20 MHz channels of FIG. 17 may have an index 1 (or, a channel index, a channel number, etc.), and a center frequency of 5.945 GHz may be allocated. That is, the center frequency of the channel index N may be determined to be (5.940 + 0.005*N) GHz.
  • the index (or channel number) of the 20 MHz channel of FIG. 17 is 1, 5, 9, 13, 17, 21, 25, 29, 33, 37, 41, 45, 49, 53, 57, 61, 65, 69, 73, 77, 81, 85, 89, 93, 97, 101, 105, 109, 113, 117, 121, 125, 129, 133, 137, 141, 145, 149, 153, 157, 161, 165, 169, 173, 177, 181, 185, 189, 193, 197, 201, 205, 209, 213, 217, 221, 225, 229, 233.
  • the index of the 40 MHz channel of FIG. 17 is 3, 11, 19, 27, 35, 43, 51, 59, 67, 75, 83, 91, 99, 107, 115, 123, 131, 139, 147, 155, 163, 171, 179, 187, 195, 203, 211, 219, 227.
  • a 240 MHz channel or a 320 MHz channel may be additionally added.
  • the PPDU of FIG. 18 may be referred to by various names such as an EHT PPDU, a transmission PPDU, a reception PPDU, a first type or an Nth type PPDU.
  • a PPDU or an EHT PPDU may be referred to by various names such as a transmission PPDU, a reception PPDU, a first type or an Nth type PPDU.
  • the EHT PPU may be used in an EHT system and/or a new WLAN system in which the EHT system is improved.
  • the PPDU of FIG. 18 may represent some or all of the PPDU types used in the EHT system.
  • the example of FIG. 18 may be used for both a single-user (SU) mode and a multi-user (MU) mode.
  • the PPDU of FIG. 18 may be a PPDU for one receiving STA or a plurality of receiving STAs.
  • the EHT-SIG of FIG. 18 may be omitted.
  • the STA that has received the Trigger frame for uplink-MU (UL-MU) communication may transmit a PPDU in which the EHT-SIG is omitted in the example of FIG. 18 .
  • 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. 18 is set to 312.5 kHz, and the subcarrier spacing of the EHT-STF, EHT-LTF, and Data fields may be set to 78.125 kHz. That is, the tone index (or subcarrier index) of the L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT-SIG fields is expressed in units of 312.5 kHz, EHT-STF, EHT-LTF, The tone index (or subcarrier index) of the Data field may be displayed in units of 78.125 kHz.
  • L-LTF and L-STF may be the same as the conventional fields.
  • the L-SIG field of FIG. 18 may include, for example, 24-bit bit information.
  • 24-bit information may include a 4-bit Rate field, a 1-bit Reserved bit, a 12-bit Length field, a 1-bit Parity bit, and a 6-bit Tail bit.
  • the 12-bit Length field may include information about the length or time duration of the PPDU.
  • the value of the 12-bit Length field may be determined based on the type of the PPDU. For example, when the PPDU is a non-HT, HT, VHT PPDU or an EHT PPDU, the value of the Length field may be determined as a multiple of 3.
  • the value of the Length field may be determined as "a multiple of 3 + 1" or "a multiple of 3 +2".
  • the value of the Length field may be determined as a multiple of 3
  • the value of the Length field may be "a multiple of 3 + 1" or "a multiple of 3" +2".
  • the transmitting STA may apply BCC encoding based on a code rate of 1/2 to 24-bit information of the L-SIG field. Thereafter, the transmitting STA may obtain a 48-bit BCC encoding bit. BPSK modulation may be applied to 48-bit coded bits to generate 48 BPSK symbols. The transmitting STA may map 48 BPSK symbols to positions excluding pilot subcarriers ⁇ subcarrier indexes -21, -7, +7, +21 ⁇ and DC subcarriers ⁇ subcarrier index 0 ⁇ .
  • the transmitting STA may additionally map the signals of ⁇ -1, -1, -1, 1 ⁇ to the subcarrier indexes ⁇ -28, -27, +27, +28 ⁇ .
  • the above signal may be used for channel estimation in the frequency domain corresponding to ⁇ -28, -27, +27, +28 ⁇ .
  • the transmitting STA may generate the RL-SIG generated in the same way as the L-SIG.
  • BPSK modulation may be applied.
  • the receiving STA may know that the received PPDU is an HE PPDU or an EHT PPDU based on the existence of the RL-SIG.
  • a U-SIG may be inserted after the RL-SIG of FIG. 18 .
  • the U-SIG may be referred to by various names such as a first SIG field, a first SIG, a first type SIG, a control signal, a control signal field, and a first (type) control signal.
  • the U-SIG may include information of N bits, and may include information for identifying the type of the EHT PPDU.
  • the U-SIG may be configured based on two symbols (eg, two consecutive OFDM symbols).
  • Each symbol (eg, OFDM symbol) for U-SIG may have a duration of 4 us.
  • Each symbol of the U-SIG may be used to transmit 26-bit information.
  • each symbol of the U-SIG may be transmitted/received based on 52 data tones and 4 pilot tones.
  • A-bit information (eg, 52 un-coded bits) may be transmitted, and the first symbol of the U-SIG is the first of the total A-bit information.
  • X-bit information (eg, 26 un-coded bits) is transmitted, and the second symbol of U-SIG can transmit the remaining Y-bit information (eg, 26 un-coded bits) of the total A-bit information.
  • the transmitting STA may obtain 26 un-coded bits included in each U-SIG symbol.
  • the transmitting STA may generate 52 BPSK symbols allocated to each U-SIG symbol by performing BPSK modulation on the interleaved 52-coded bits.
  • One U-SIG symbol may be transmitted based on 56 tones (subcarriers) from subcarrier index -28 to subcarrier index +28, except for DC index 0.
  • the 52 BPSK symbols generated by the transmitting STA may be transmitted based on the remaining tones (subcarriers) excluding pilot tones -21, -7, +7, and +21 tones.
  • A-bit information (eg, 52 un-coded bits) transmitted by U-SIG includes a CRC field (eg, a 4-bit long field) and a tail field (eg, a 6-bit long field). ) may be included.
  • the CRC field and the tail field may be transmitted through the second symbol of the U-SIG.
  • the CRC field may be generated based on the remaining 16 bits except for the CRC/tail field in the 26 bits allocated to the first symbol of the U-SIG and the second symbol, and may be generated based on the conventional CRC calculation algorithm.
  • the tail field may be used to terminate the trellis of the convolutional decoder, and may be set to, for example, 000000.
  • a bit information (eg, 52 un-coded bits) transmitted by U-SIG may be divided into version-independent bits and version-dependent bits.
  • the size of the version-independent bits may be fixed or variable.
  • the version-independent bits may be allocated only to the first symbol of the U-SIG, or the version-independent bits may be allocated to both the first symbol and the second symbol of the U-SIG.
  • the version-independent bits and the version-dependent bits may be referred to by various names such as a first control bit and a second control bit.
  • the version-independent bits of the U-SIG may include a 3-bit PHY version identifier.
  • the 3-bit PHY version identifier may include information related to the PHY version of the transmission/reception PPDU.
  • the first value of the 3-bit PHY version identifier may indicate that the transmission/reception PPDU is an EHT PPDU.
  • the transmitting STA may set the 3-bit PHY version identifier to the first value.
  • the receiving STA may determine that the receiving PPDU is an EHT PPDU based on the PHY version identifier having the first value.
  • the version-independent bits of the U-SIG may include a 1-bit UL/DL flag field.
  • a first value of the 1-bit UL/DL flag field relates to UL communication, and a second value of the UL/DL flag field relates to DL communication.
  • the version-independent bits of the U-SIG may include information about the length of the TXOP and information about the BSS color ID.
  • EHT PPDU related to SU mode e.g., various types such as EHT PPDU related to SU mode, EHT PPDU related to MU mode, EHT PPDU related to TB mode, EHT PPDU related to Extended Range transmission
  • information about the type of the EHT PPDU may be included in the version-dependent bits of the U-SIG.
  • the U-SIG is 1) a bandwidth field including information about bandwidth, 2) a field including information about an MCS technique applied to the EHT-SIG, 3) dual subcarrier modulation to the EHT-SIG (dual An indication field including information on whether subcarrier modulation, DCM) technique is applied, 4) a field including information on the number of symbols used for EHT-SIG, 5) EHT-SIG is generated over the entire band It may include a field including information on whether or not it is, 6) a field including information about the type of EHT-LTF/STF, and 7) information about a field indicating the length of the EHT-LTF and the CP length.
  • Preamble puncturing may be applied to the PPDU of FIG. 18 .
  • Preamble puncturing refers to applying puncturing to some bands (eg, secondary 20 MHz band) among all bands of the PPDU. For example, when an 80 MHz PPDU is transmitted, the STA may apply puncturing to the secondary 20 MHz band among the 80 MHz band, and transmit the PPDU only through the primary 20 MHz band and the secondary 40 MHz band.
  • the pattern of preamble puncturing may be set in advance. For example, when the first puncturing pattern is applied, puncturing may be applied only to the secondary 20 MHz band within the 80 MHz band. For example, when the second puncturing pattern is applied, puncturing may be applied to only one of the two secondary 20 MHz bands included in the secondary 40 MHz band within the 80 MHz band. For example, when the third puncturing pattern is applied, puncturing may be applied only to the secondary 20 MHz band included in the primary 80 MHz band within the 160 MHz band (or 80+80 MHz band).
  • the primary 40 MHz band included in the primary 80 MHz band within the 160 MHz band (or 80+80 MHz band) is present and does not belong to the primary 40 MHz band. Puncture may be applied to at least one 20 MHz channel that is not
  • Information on preamble puncturing applied to the PPDU may be included in the U-SIG and/or the EHT-SIG.
  • the first field of the U-SIG includes information about the contiguous bandwidth of the PPDU
  • the second field of the U-SIG includes information about the preamble puncturing applied to the PPDU. have.
  • U-SIG and EHT-SIG may include information about preamble puncturing based on the following method.
  • the U-SIG may be individually configured in units of 80 MHz.
  • the PPDU may include a first U-SIG for the first 80 MHz band and a second U-SIG for the second 80 MHz band.
  • the first field of the first U-SIG includes information about the 160 MHz bandwidth
  • the second field of the first U-SIG includes information about the preamble puncturing applied to the first 80 MHz band (that is, the preamble information about the puncturing pattern).
  • the first field of the second U-SIG includes information about the 160 MHz bandwidth
  • the second field of the second U-SIG includes information about the preamble puncturing applied to the second 80 MHz band (ie, preamble puncture). information about processing patterns).
  • the EHT-SIG subsequent to the first U-SIG may include information on preamble puncturing applied to the second 80 MHz band (that is, information on the preamble puncturing pattern), and in the second U-SIG
  • the successive EHT-SIG may include information about preamble puncturing applied to the first 80 MHz band (ie, information about a preamble puncturing pattern).
  • the U-SIG and the EHT-SIG may include information on preamble puncturing based on the following method.
  • the U-SIG may include information on preamble puncturing for all bands (ie, information on preamble puncturing patterns). That is, the EHT-SIG does not include information about the preamble puncturing, and only the U-SIG may include information about the preamble puncturing (ie, information about the preamble puncturing pattern).
  • the U-SIG may be configured in units of 20 MHz. For example, when an 80 MHz PPDU is configured, the U-SIG may be duplicated. That is, the same 4 U-SIGs may be included in the 80 MHz PPDU. PPDUs exceeding the 80 MHz bandwidth may include different U-SIGs.
  • the EHT-SIG of FIG. 18 may include control information for the receiving STA.
  • the EHT-SIG may be transmitted through at least one symbol, and one symbol may have a length of 4 us. Information on the number of symbols used for the EHT-SIG may be included in the U-SIG.
  • the EHT-SIG may include technical features of the HE-SIG-B described with reference to FIGS. 8 to 9 .
  • the EHT-SIG may include a common field and a user-specific field, as in the example of FIG. 8 .
  • the common field of the EHT-SIG may be omitted, and the number of user-individual fields may be determined based on the number of users.
  • the common field of the EHT-SIG and the user-individual field of the EHT-SIG may be individually coded.
  • One user block field included in the user-individual field may contain information for two users, but the last user block field included in the user-individual field is for one user. It is possible to include information. That is, one user block field of the EHT-SIG may include a maximum of two user fields.
  • each user field may be related to MU-MIMO assignment or may be related to non-MU-MIMO assignment.
  • the common field of the EHT-SIG may include a CRC bit and a Tail bit
  • the length of the CRC bit may be determined as 4 bits
  • the length of the Tail bit may be determined as 6 bits and set to '000000'. can be set.
  • the common field of the EHT-SIG may include RU allocation information.
  • the RU allocation information may refer to information about a location of an RU to which a plurality of users (ie, a plurality of receiving STAs) are allocated.
  • RU allocation information may be configured in units of 8 bits (or N bits).
  • Tables 5 to 7 is an example of 8-bit (or N-bit) information for various RU allocation. Indexes displayed in each table can be changed, some entries in Tables 5 to 7 may be omitted, and entries not displayed may be added.
  • Tables 5 to 7 relate to information about the location of an RU allocated to a 20 MHz band.
  • 'index 0' of Table 5 may be used in a situation in which nine 26-RUs are individually allocated (eg, a situation in which nine 26-RUs shown in FIG. 5 are individually allocated).
  • one 26-RU is one user (that is, on the leftmost side of the 20 MHz band) receiving STA), and one 26-RU and one 52-RU on the right side are allocated for another user (ie, the receiving STA), and 5 26-RUs on the right side are allocated individually can be
  • a mode in which the common field of EHT-SIG is omitted may be supported.
  • the mode in which the common field of EHT-SIG is omitted may be called compressed mode.
  • a plurality of users (ie, a plurality of receiving STAs) of the EHT PPDU may decode the PPDU (eg, the data field of the PPDU) based on non-OFDMA. That is, a plurality of users of the EHT PPDU may decode a PPDU (eg, a data field of the PPDU) received through the same frequency band.
  • a plurality of users of the EHT PPDU may decode the PPDU (eg, the data field of the PPDU) based on OFDMA. That is, a plurality of users of the EHT PPDU may receive the PPDU (eg, a data field of the PPDU) through different frequency bands.
  • the EHT-SIG may be configured based on various MCS techniques. As described above, information related to the MCS technique applied to the EHT-SIG may be included in the U-SIG.
  • the EHT-SIG may be configured based on the DCM technique. For example, among the N data tones (eg, 52 data tones) allocated for the EHT-SIG, a first modulation scheme is applied to a continuous half tone, and a second modulation scheme is applied to the remaining consecutive half tones. technique can be applied.
  • the transmitting STA modulates specific control information to a first symbol based on the first modulation scheme and allocates to consecutive half tones, modulates the same control information to a second symbol based on the second modulation scheme, and performs the remaining continuous can be allocated to half the tone.
  • information eg, 1-bit field
  • information related to whether the DCM technique is applied to the EHT-SIG may be included in the U-SIG.
  • the EHT-STF of FIG. 18 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. 18 may be used to estimate a channel in a MIMO environment or an OFDMA environment.
  • the EHT-STF of FIG. 18 may be set to various types.
  • the first type of STF ie, 1x STF
  • the STF signal generated based on the first type STF sequence may have a period of 0.8 ⁇ s, and the 0.8 ⁇ s period signal may be repeated 5 times to become the first type STF having a length of 4 ⁇ s.
  • the second type of STF ie, 2x STF
  • the STF signal generated based on the second type STF sequence may have a cycle of 1.6 ⁇ s, and the cycle signal of 1.6 ⁇ s may be repeated 5 times to become a second type EHT-STF having a length of 8 ⁇ s.
  • an example of a sequence ie, an EHT-STF sequence
  • the following sequence may be modified in various ways.
  • the EHT-STF may be configured based on the following M sequence.
  • M ⁇ -1, -1, -1, 1, 1, 1, -1, 1, 1, 1, -1, 1, 1, -1, 1 ⁇
  • the EHT-STF for the 20 MHz PPDU may be configured based on the following equation.
  • the following example may be a first type (ie, 1x STF) sequence.
  • the first type sequence may be included in an EHT-PPDU rather than a trigger-based (TB) PPDU.
  • (a:b:c) may mean a section defined as a b tone interval (ie, subcarrier interval) from a tone index (ie, subcarrier index) to c tone index.
  • Equation 2 below may represent a sequence defined at intervals of 16 tones from tone index -112 to index 112.
  • * means multiplication and sqrt() means square root.
  • j means an imaginary number.
  • EHT-STF(-112:16:112) ⁇ M ⁇ *(1 + j)/sqrt(2)
  • the EHT-STF for the 40 MHz PPDU may be configured based on the following equation.
  • the following example may be a first type (ie, 1x STF) sequence.
  • EHT-STF(-240:16:240) ⁇ M, 0, -M ⁇ *(1 + j)/sqrt(2)
  • the EHT-STF for the 80 MHz PPDU may be configured based on the following equation.
  • the following example may be a first type (ie, 1x STF) sequence.
  • EHT-STF(-496:16:496) ⁇ M, 1, -M, 0, -M, 1, -M ⁇ *(1 + j)/sqrt(2)
  • the EHT-STF for the 160 MHz PPDU may be configured based on the following equation.
  • the following example may be a first type (ie, 1x STF) sequence.
  • EHT-STF(-1008:16:1008) ⁇ M, 1, -M, 0, -M, 1, -M, 0, -M, -1, M, 0, -M, 1, -M ⁇ *(1 + j)/sqrt(2)
  • a sequence for the lower 80 MHz among the EHT-STFs for the 80+80 MHz PPDU may be the same as Equation (4).
  • a sequence for the upper 80 MHz among the EHT-STFs for the 80+80 MHz PPDU may be configured based on the following equation.
  • EHT-STF(-496:16:496) ⁇ -M, -1, M, 0, -M, 1, -M ⁇ *(1 + j)/sqrt(2)
  • Equations 7 to 11 below relate to an example of a second type (ie, 2x STF) sequence.
  • EHT-STF(-120:8:120) ⁇ M, 0, -M ⁇ *(1 + j)/sqrt(2)
  • the EHT-STF for the 40 MHz PPDU may be configured based on the following equation.
  • EHT-STF(-248:8:248) ⁇ M, -1, -M, 0, M, -1, M ⁇ *(1 + j)/sqrt(2)
  • the EHT-STF for the 80 MHz PPDU may be configured based on the following equation.
  • EHT-STF(-504:8:504) ⁇ M, -1, M, -1, -M, -1, M, 0, -M, 1, M, 1, -M, 1, -M ⁇ *(1 + j)/sqrt(2)
  • the EHT-STF for the 160 MHz PPDU may be configured based on the following equation.
  • EHT-STF(-1016:16:1016) ⁇ M, -1, 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)
  • a sequence for the lower 80 MHz among the EHT-STFs for the 80+80 MHz PPDU may be the same as Equation (9).
  • a sequence for the upper 80 MHz among the EHT-STFs for the 80+80 MHz PPDU may be configured based on the following equation.
  • EHT-STF(-504:8:504) ⁇ -M, 1, -M, 1, M, 1, -M, 0, -M, 1, M, 1, -M, 1, -M ⁇ * (1 + j)/sqrt(2)
  • the EHT-LTF may have a first, second, and third type (ie, 1x, 2x, 4x LTF).
  • the first/second/third type LTF may be generated based on an LTF sequence in which non-zero coefficients are disposed at intervals of 4/2/1 subcarriers.
  • the first/second/third type LTF may have a time length of 3.2/6.4/12.8 ⁇ s.
  • GIs of various lengths (eg, 0.8/1/6/3.2 ⁇ s) may be applied to the first/second/third type LTF.
  • Information on the type of STF and/or LTF may be included in the SIG A field and/or the SIG B field of FIG. 18 .
  • the PPDU of FIG. 18 (ie, EHT-PPDU) may be configured based on the examples of FIGS. 5 and 6 .
  • the EHT PPDU transmitted on the 20 MHz band may be configured based on the RU of FIG. 5 . That is, the location of the RU of the EHT-STF, EHT-LTF, and data field included in the EHT PPDU may be determined as shown in FIG. 5 .
  • the EHT PPDU transmitted on the 40 MHz band may be configured based on the RU of FIG. 6 . That is, the location of the RU of the EHT-STF, EHT-LTF, and data field included in the EHT PPDU may be determined as shown in FIG. 6 .
  • a tone-plan for 80 MHz may be determined. That is, the 80 MHz EHT PPDU may be transmitted based on a new tone-plan in which the RU of FIG. 6 is repeated twice instead of the RU of FIG. 7 .
  • 23 tones may be configured in the DC region. That is, the tone-plan for the 80 MHz EHT PPDU allocated based on OFDMA may have 23 DC tones.
  • 80 MHz EHT PPDU ie, non-OFDMA full bandwidth 80 MHz PPDU allocated on the basis of Non-OFDMA is configured based on 996 RUs and consists of 5 DC tones, 12 left guard tones, and 11 right guard tones. may include.
  • the tone-plan for 160/240/320 MHz may be configured in the form of repeating the pattern of FIG. 6 several times.
  • the PPDU of FIG. 18 may be determined (or identified) as an EHT PPDU based on the following method.
  • the receiving STA may determine the type of the receiving PPDU as an EHT PPDU based on the following items. For example, 1) the first symbol after the L-LTF signal of the received PPDU is BPSK, 2) the RL-SIG where the L-SIG of the received PPDU is repeated is detected, 3) the L-SIG of the received PPDU is Length When a result of applying "modulo 3" to the field value is detected as 0, the received PPDU may be determined as an EHT PPDU.
  • the receiving STA determines the type of the EHT PPDU (eg, SU/MU/Trigger-based/Extended Range type) based on bit information included in the symbols after the RL-SIG of FIG. 18 . ) can be detected.
  • the type of the EHT PPDU eg, SU/MU/Trigger-based/Extended Range type
  • the receiving STA 1) the first symbol after the L-LTF signal, which is BSPK, 2) the RL-SIG that is continuous to the L-SIG field and is the same as the L-SIG, 3) the result of applying "modulo 3" is 0
  • the 3-bit PHY version identifier eg, the PHY version identifier having the first value
  • the receiving STA may determine the type of the receiving PPDU as the HE PPDU based on the following items. For example, 1) the first symbol after the L-LTF signal is BPSK, 2) RL-SIG where L-SIG is repeated is detected, and 3) "modulo 3" is applied to the Length value of L-SIG. When the result is detected as "1" or "2", the received PPDU may be determined as an HE PPDU.
  • the receiving STA may determine the type of the received PPDU as non-HT, HT, and VHT PPDU based on the following items. For example, if 1) the first symbol after the L-LTF signal is BPSK, and 2) RL-SIG in which L-SIG is repeated is not detected, the received PPDU is determined to be non-HT, HT and VHT PPDU. can In addition, even if the receiving STA detects the repetition of the RL-SIG, if the result of applying "modulo 3" to the Length value of the L-SIG is detected as 0, the received PPDU is determined as non-HT, HT and VHT PPDU can be
  • (transmit/receive/uplink/downlink) signals may be a signal transmitted/received based on the PPDU of FIG. 18 .
  • the PPDU of FIG. 18 may be used to transmit and receive various types of frames.
  • the PPDU of FIG. 18 may be used for a control frame.
  • control frame may include request to send (RTS), clear to send (CTS), Power Save-Poll (PS-Poll), BlockACKReq, BlockAck, Null Data Packet (NDP) announcement, and Trigger Frame.
  • the PPDU of FIG. 18 may be used for a management frame.
  • An example of the management frame may include a Beacon frame, a (Re-)Association Request frame, a (Re-)Association Response frame, a Probe Request frame, and a Probe Response frame.
  • the PPDU of FIG. 18 may be used for a data frame.
  • the PPDU of FIG. 18 may be used to simultaneously transmit at least two or more of a control frame, a management frame, and a data frame.
  • FIG. 19 shows a modified example of a transmitting apparatus and/or a receiving apparatus of the present specification.
  • Each device/STA of the sub-drawings (a)/(b) of FIG. 1 may be modified as shown in FIG. 19 .
  • the transceiver 630 of FIG. 19 may be the same as the transceivers 113 and 123 of FIG. 1 .
  • the transceiver 630 of FIG. 19 may include a receiver and a transmitter.
  • the processor 610 of FIG. 19 may be the same as the processors 111 and 121 of FIG. 1 . Alternatively, the processor 610 of FIG. 19 may be the same as the processing chips 114 and 124 of FIG. 1 .
  • the memory 150 of FIG. 19 may be the same as the memories 112 and 122 of FIG. 1 .
  • the memory 150 of FIG. 19 may be a separate external memory different from the memories 112 and 122 of FIG. 1 .
  • the power management module 611 manages power for the processor 610 and/or the transceiver 630 .
  • the battery 612 supplies 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 .
  • a keypad 614 may be displayed on the display 613 .
  • SIM card 615 may be an integrated circuit used to securely store an international mobile subscriber identity (IMSI) used to identify and authenticate subscribers in mobile phone devices, such as mobile phones and computers, and keys associated therewith. .
  • IMSI international mobile subscriber identity
  • the speaker 640 may output a sound related result processed by the processor 610 .
  • Microphone 641 may receive sound related input to be used by processor 610 .
  • FIG. 20 shows an example of a HE-PPDU.
  • the illustrated L-STF 2000 may include a short training orthogonal frequency division multiplexing symbol (OFDM).
  • the L-STF 2000 may be used for frame detection, automatic gain control (AGC), diversity detection, and coarse frequency/time synchronization.
  • AGC automatic gain control
  • the L-LTF 2010 may include a long training orthogonal frequency division multiplexing symbol (OFDM).
  • OFDM orthogonal frequency division multiplexing symbol
  • the L-LTF 2010 may be used for fine frequency/time synchronization and channel prediction.
  • the L-SIG 2020 may be used to transmit control information.
  • the L-SIG 2020 may include information on a data rate and a data length. Also, the L-SIG 2020 may be repeatedly transmitted. That is, the L-SIG 2020 may be configured in a repeating format (eg, may be referred to as R-LSIG).
  • the HE-SIG-A 2030 may include control information common to the receiving stations.
  • HE-SIG-A 2030 is, 1) DL/UL indicator, 2) BSS color field that is an identifier of BSS, 3) field indicating the remaining time of the current TXOP section, 4) 20, Bandwidth field indicating whether 40, 80, 160, 80+80 MHz, 5) field indicating MCS technique applied to HE-SIG-B, 6) HE-SIG-B dual subcarrier modulation for MCS ( Dual subcarrier modulation) an indication field for whether modulation is performed, 7) a field indicating the number of symbols used for HE-SIG-B, 8) indicating whether HE-SIG-B is generated over the entire band field, 9) a field indicating the number of symbols of HE-LTF, 10) a field indicating a length of HE-LTF and a CP length, 11) a field indicating whether additional OFDM symbols exist for LDPC coding, 12) It may include information on a field indicating control information on Packet Extension (PE), 13) a
  • HE-SIG-A 2030 may be composed of two parts: HE-SIG-A1 and HE-SIG-A2.
  • HE-SIG-A1 and HE-SIG-A2 included in HE-SIG-A may be defined in the following format structure (field) according to the PPDU.
  • the HE-SIG-A field of the HE SU PPDU may be defined as follows.
  • the HE-SIG-A field of the HE MU PPDU may be defined as follows.
  • the HE-SIG-A field of the HE TB PPDU may be defined as follows.
  • the HE-SIG-B 2040 may be included only in the case of a PPDU for multiple users (MUs) as described above. Basically, the HE-SIG-A 2050 or the HE-SIG-B 2060 may include resource allocation information (or virtual resource allocation information) for at least one receiving STA.
  • resource allocation information or virtual resource allocation information
  • the 802.11be ie, EHT
  • multiple RUs may be allocated to transmit signals.
  • only the whole bandwidth was used in the SU PPDU of the 802.11ax standard. Therefore, through the RU allocation of the 802.11ax standard, an indication for multiple RU allocation cannot be performed.
  • an indication for multiple RUs allocated in the EHT standard may be required.
  • a technical feature regarding a multiple RU indication for efficiently transmitting a signal using multiple RU allocation for a single STA may be proposed.
  • the EHT standard may be proposed.
  • the EHT standard may support a wide bandwidth (eg, a bandwidth of 320 MHz or more), 16 streams, and/or multi-link (or multi-band) operation. Therefore, to support a transmission method based on the EHT standard, a new frame format may be used.
  • a new frame format may be used.
  • convention Wi-Fi receivers (or STAs) eg, 802.11n
  • Receivers according to the /ac/ax standard may also receive the EHT signal transmitted through the 2.4/5/6 GHz band.
  • the preamble of the PPDU based on the EHT standard may be set in various ways.
  • an embodiment in which a preamble of a PPDU based on the EHT standard is configured may be described.
  • a PPDU based on the EHT standard may be described as an EHT PPDU.
  • the EHT PPDU is not limited to the EHT standard.
  • the EHT PPDU may include not only the 802.11be standard (ie, the EHT standard), but also a PPDU based on a new standard obtained by improving/evolving/extending the 802.11be standard.
  • EHT MU PPDU a format for a single user (SU) and a format for a multi user (MU) may be identically configured. Accordingly, the EHT PPDU for the SU and the MU may be referred to as an EHT MU PPDU.
  • EHT MU PPDU an EHT MU PPDU may be described as an EHT PPDU.
  • 21 shows an example of an EHT PPDU.
  • the EHT PPDU 2100 may include an L-part 2110 and an EHT-part 2120 .
  • the EHT PPDU 2100 may be configured in a format to support backward compatibility.
  • the EHT PPDU 2100 may be transmitted to a single STA (single STA) and/or multiple STAs.
  • the EHT PPDU 2100 may be configured in a structure in which the L-part 2110 is first transmitted before the EHT-part 2120 for coexistence with the legacy STA (STA according to the 802.11n/ac/ax standard).
  • the L-part 2110 may include L-STF, L-LTF, and L-SIG.
  • the EHT part 2120 may include RL-SIG, U-SIG 2121, EHT-SIG 2122, EHT-STF, EHT-LTF and EHT-data fields.
  • the U-SIG 2121 may include a version independent field and a version dependent field. An example of the U-SIG 2121 may be described with reference to FIG. 22 .
  • the U-SIG 2200 may correspond to the U-SIG 2121 of FIG. 21 .
  • the U-SIG 2200 may include a Version independent field 2210 and a Version dependent field 2220 .
  • the version independent field 2210 may include a version identifier of 3 bits indicating the EHT standard and the Wi-Fi version after the EHT standard.
  • the version independent field 2210 may include 3 bits of information about the EHT standard and the Wi-Fi version after the EHT standard.
  • the version independent field 2210 may further include a 1-bit DL/UL field, a field related to BSS color, and/or a field related to TXOP duration.
  • the version independent field 2210 may further include 1-bit information on DL/UL, information on BSS color, and/or information on TXOP duration.
  • the version dependent field 2220 may include a field/information about a PPDU format type, a field/information about a bandwidth, and/or a field/information about an MCS.
  • the U-SIG 2200 may consist of two symbols. The two symbols may be jointly encoded. According to an embodiment, the U-SIG 2200 may be configured with 52 data tones and 4 pilot tones for each 20 MHz. In addition, it may be modulated in the same manner as HE-SIG-A of the HE standard. For example, the U-SIG 2200 may be modulated with BPSK and a code rate of 1/2.
  • the EHT-SIG 2122 may include a version dependent field that is not included in the U-SIG 2121 .
  • the EHT-SIG 2122 may include information overflowed from the U-SIG 2121 .
  • the EHT-SIG 2122 may include information dependent on the version of the PPDU.
  • the EHT-SIG 2122 may include at least some of fields included in HE-SIG-A of the HE specification.
  • the EHT-SIG 2122 may consist of a plurality of OFDM symbols. According to an embodiment, the EHT-SIG 2122 may be modulated with various MCSs. For example, the EHT-SIG 2122 may be modulated based on MCS0 to MCS5.
  • the EHT-SIG 2122 may include a common field and a user specific field.
  • the common field may include information on spatial stream information and information on RU allocation.
  • the user specific field may include at least one user block field including information about the user.
  • the user specific field may include/indicate information on information ID, MCS, and coding used for a specific user or STA.
  • the user specific field may include at least one user block field.
  • SU transmission may be performed using 20/40/80/160/240/320 MHz.
  • the EHT STA may transmit a signal using a non-continuous bandwidth.
  • the non-continuous bandwidth may be configured in units of 20 MHz.
  • the EHT STA ie, the transmitting STA
  • SU transmission may be performed.
  • technical features for the allocation of multiple RUs may be described below.
  • the configuration of the RU used for SU transmission consists of a continuous RU of 60/100/120/140/180/200/220/260/280/300 MHz and two non-continuous RUs within the allocated BW.
  • the configuration of the RU used for SU transmission may consist of two non-continuous RUs.
  • a 260 MHz non-continuous RU may be configured with a 20 MHz RU and a 240 MHz RU discontinuous from the 20 MHz RU.
  • the size of an RU used for SU transmission may be configured as 242, 484, or 996. Multiple RUs may be allocated based on 242 RUs.
  • P20 (Primary 20 MHz) is 242 RUs that come first in the RU location.
  • the location of P20 is exemplary, and P20 may exist in a different location.
  • the RU allocation position may be expressed as 1.
  • the configuration of multiple RUs may be expressed in square brackets (ie, []) in units of 80 MHz.
  • multiple RUs at 80 MHz may be expressed as [a b c d].
  • Each of a, b, c, and d may be set to one of 0 and 1.
  • multiple RUs at 80 MHz may be expressed as [1 0 0 1]. This may mean that multiple RUs at 80 MHz are configured with first and fourth RUs of 20 MHz.
  • multiple RUs at 160 MHz may be expressed as [a b c d] [e f g h].
  • a configuration of multiple RUs may be described based on the above-described expression.
  • multiple RUs may be configured in non-continuous 40 MHz (hereinafter, 3-A).
  • multiple RUs may be configured in non-continuous 60 MHz (hereinafter, 3-B).
  • multiple RUs may be configured in the entire 80 MHz (hereinafter, 3-C).
  • the allocation position of 242 RUs may be expressed as [1 0 1 0] and [1 0 0 1] within 80 MHz.
  • 1 may indicate allocated 242 RUs and 0 may indicate unassigned 242 RUs.
  • a comma (,) can be used to separate cases. That is, in the above example, the allocation position of 242 RUs may be configured as [1 0 1 0] within 80 MHz or as [1 0 0 1] within 80 MHz. The same may be used in the following.
  • information on RU combination/preamble puncturing may be transmitted by configuring an allocation/puncturing bit map including combinations of various BW combinations and RU combinations.
  • A. 7-bit information is required to indicate the number of combinations of various continuous BWs and multiple RUs (consisting of two non-continuous RUs) configured in the above example. Accordingly, the 7-bit table for indicating the combination may be configured as follows.
  • a multiple RU allocation/puncturing table (7 bit table) for SU transmission may be configured as shown in Tables 21 to 29.
  • the RU indication/preamble puncturing bit table may be configured as an 8-bit table.
  • the 8-bit table may be configured similarly to the above-described 7-bit table, and the 8-bit table may indicate an entire RU combination for BW.
  • the 8-bit table may include information on all RU combinations for BW.
  • the BW may be composed of 3 bits to indicate 20, 40, 80, 160/80+80, 240/160+80, 160+160/320.
  • allocation/puncturing information may be transmitted as follows.
  • the SU-PPDU (or MU PPDU) may be configured to include a user field/EHT-SIG.
  • allocation information for the above-described RU combination may be included in the user field/EHT-SIG.
  • the user field/EHT-SIG may be configured to include RU allocation information like the common field of 11ax HE-SIGB.
  • the user field/EHT-SIG may include a CRC and a tail bit.
  • the user field/EHT-SIG may include user specific information and may include one STA-ID during SU transmission.
  • the User field may be located after the EHT-SIGA or after the U-SIG when there is no EHT-SIGA.
  • the User field/EHT-SIG is configured in units of 20 MHz/40 MHz and may be transmitted by duplication during wide bandwidth transmission.
  • User field/EHT-SIG may have different configuration granularity according to transmission BW.
  • user field/EHT-SIG may be configured in units of 20 MHz up to 160 MHz, and user field/EHT-SIG may be configured and transmitted in units of 40 MHz for BW above 240 MHz.
  • the granularity may be indicated through the U-SIG. In this case, 1 bit may be used to indicate the granularity.
  • the RU allocation information may be transmitted while being included in the EHT-SIGA during SU transmission.
  • the EHT-SIGA may be configured with a common control field and an RU allocation bit during SU transmission.
  • the information is jointly encoded and may include one CRC and a tail bit.
  • EHT-SIGA can be applied with the same modulation and code rate as 11ax HE-SIGA.
  • bit table including the BW and RU allocation/preamble puncturing information may be transmitted through the U-SIG of the EHT-PPDU.
  • the allocation bit map may be transmitted using the BW field of the U-SIG.
  • the presence or absence of RU allocation per 20 MHz may be indicated.
  • BW may be composed of 3/4 bits to represent 20,40,80,160/80+80,240/160+80,160+160/320.
  • BW may be composed of 4 bits.
  • Information on BW may be transmitted through the BW field.
  • Information on M-RU aggregation/preamble puncturing may be transmitted/indicated using allocation/pattern information included in the EHT-SIG/User field.
  • Information on 20 MHz allocated in the BW used by the STA may be individually indicated in units of 20 MHz.
  • the information may be configured as follows.
  • Information on 20 MHz allocated in the BW in units of 80 MHz may be indicated.
  • the information may consist of 4 bits per 80 MHz channel. That is, information on 20 MHz allocated within 80 MHz may be indicated as [x1 x2 x3 x4].
  • x1 to x4 may be set to 1 or 0.
  • x1 to x4 may be set to 1 when the corresponding 20 MHz channel is allocated.
  • x1 to x4 may be set to 0 when the corresponding 20 MHz channel is not allocated. That is, x1 may indicate whether the first 20 MHz is allocated within the 80 MHz bandwidth or whether preamble puncturing is applied.
  • x2 may indicate whether the second 20 MHz is allocated within the 80 MHz bandwidth or whether preamble puncturing is applied.
  • x3 may indicate whether the third 20 MHz is allocated within the 80 MHz bandwidth or whether preamble puncturing is applied.
  • x4 may indicate whether the fourth 20 MHz is allocated within the 80 MHz bandwidth or whether preamble punct
  • non-continuous RUs may be allocated within 80 MHz.
  • the allocated RU may be 484+242 (third 20MHz channel).
  • the information may be set to [1 1 1 0] as an indication for the allocated RU.
  • C-ii when the BW is less than 80 MHz, it is composed of 4 bits, and when the BW is greater than 80 MHz, the information about 20 MHz allocated in the BW can be composed of N*4 bits.
  • N may mean the number of 80 MHz channels. * can mean multiplication.
  • the EHT STA ie, the transmitting STA
  • transmits a signal eg, EHT PPDU
  • bit size for the indication of RU allocation may be changed according to the transmission BW.
  • the EHT STA may individually indicate whether to allocate 20 MHz in units of 80 MHz to indicate RU allocation with the same bit size.
  • the information for the indication of RU allocation may be transmitted while being included in the version dependent information of the U-SIG.
  • the U-SIG may be configured differently in units of 80 MHz.
  • the above-described information on RU allocation/puncturing may be used to indicate puncturing information for 80 MHz.
  • the puncturing information for the 80 MHz may be transmitted by being included in the version independent information of the U-SIG in units of 80 MHz.
  • puncturing information for the entire BW may be transmitted through the EHT-SIG field.
  • the BW field may not include puncturing information.
  • the U-SIG may include puncturing information for 80 MHz.
  • puncturing information for the entire BW may be indicated through the EHT-SIG field.
  • the EHT-SIG field may include puncturing information for the entire BW.
  • the EHT STA may individually indicate RU allocation information in units of 20 MHz. Therefore, although the signaling overhead may be slightly large, there is an effect that the EHT STA can indicate the flexible multiple RU combination of the above-described embodiment.
  • allocation bit information may not be variably configured according to BW.
  • the EHT STA may indicate information on the RU allocated to the receiving STA by using allocation bit information of a fixed size for supporting the maximum BW.
  • the allocation bit table may consist of 16 bits.
  • the allocation bit table may be configured as [a1 a2 a3 a4 a5 to a14 a15 a16].
  • allocated RUs may be set to 1 and unassigned RUs may be set to 0.
  • the EHT STA may indicate RU allocation information or puncturing information based on the allocation bit table.
  • RU allocation/puncturing information may be configured and transmitted as follows.
  • the SU-PPDU (or MU PPDU) may include a user field/EHT-SIG.
  • allocation information for the RU combination may be included in the user field/EHT-SIG.
  • the user field/EHT-SIG may be configured to include RU allocation information like the common field of 11ax HE-SIGB.
  • the user field/EHT-SIG may include a CRC and a tail bit.
  • the user field/EHT-SIG may include user specific information.
  • the user field/EHT-SIG may be configured to include one STA-ID.
  • the User field may be located after the EHT-SIGA or after the U-SIG when there is no EHT-SIGA.
  • the User field/EHT-SIG may be configured in units of 20 MHz/40 MHz.
  • the User field/EHT-SIG may be transmitted by duplication during wide bandwidth transmission.
  • User field/EHT-SIG may have different configuration granularity according to transmission BW.
  • user field/EHT-SIG may be configured in units of 20 MHz up to 160 MHz, and user field/EHT-SIG may be configured and transmitted in units of 40 MHz for BW above 240 MHz.
  • the granularity may be indicated through the U-SIG. In this case, 1 bit may be used to indicate the granularity.
  • the RU allocation information may be transmitted while being included in the EHT-SIGA during SU transmission.
  • the EHT-SIGA may be configured with a common control field and an RU allocation bit during SU transmission.
  • the information is jointly encoded and may include one CRC and a tail bit.
  • EHT-SIGA can be applied with the same modulation and code rate as 11ax HE-SIGA.
  • bit table including the BW and RU allocation/preamble puncturing information may be transmitted through the U-SIG of the EHT-PPDU.
  • RU allocation information (or information about preamble puncturing) may be configured with 4 bits per 80 MHz. RU allocation information may be transmitted through U-SIG. In this case, the U-SIG may include different information for each 80 MHz.
  • information on RU allocation/puncturing may be used to indicate puncturing information for 80 MHz.
  • the puncturing information for 80 MHz may be transmitted by being included in version independent information (version independent field) or version dependent information (version dependent field) of the U-SIG in units of 80 MHz.
  • puncturing information for the entire BW may be transmitted through the EHT-SIG field.
  • the BW field may not include puncturing information.
  • the U-SIG may include puncturing information for 80 MHz.
  • puncturing information for the entire BW may be indicated through the EHT-SIG field.
  • the EHT-SIG field may include puncturing information for the entire BW.
  • puncturing/RU allocation (RA) information indicated through the U-SIG may be transmitted including information on the entire BW.
  • the puncturing/RU allocation (RA) information indicated through the U-SIG includes information on the entire BW, there is an effect that it is not necessary to transmit information on the entire BW through the EHT-SIG. .
  • the EHT STA may indicate RU combination information allocated per 80 MHz.
  • the EHT STA may indicate information on the RU allocated to the STA in units of 80 MHz during SU transmission.
  • 80 MHz may be configured with various RUs such as 242, 484, or 996.
  • RU allocation at 80 MHz may consist of 242, 484, or 996 RUs. That is, 80 MHz may consist of four 242 RUs, two 484 RUs, or one 996 RU.
  • an RU combination for 80 MHz may be configured as shown in Table 30 in consideration of the RU size constituting 80 MHz.
  • an RU combination for 80 MHz may be configured as shown in Table 31.
  • the EHTS STA may indicate an RU combination using various RU sizes existing within 80 MHz.
  • the EHT STA may indicate information on the allocated RU using 3/4-bit information per 80 MHz. For example, when the BW is greater than 80 MHz, information on the allocated RU may be indicated using information of N*3 / N*4 bits.
  • N may mean the number of 80 MHz channels in the BW.
  • each allocation bit size may be set to (6 or 8)/ (9 or 12)/ (12 or 16).
  • information on the allocated RU is set to 6 bits (6 bit information), and when the BW exceeds 80 MHz, information on the allocated RU is 8 bits (8 bit information) ) can be set.
  • information on the allocated RU is set to 9 bits (9 bit information), and when the BW exceeds 80 MHz, information on the allocated RU is 12 bits (12 bits) information) can be set.
  • information on the allocated RU is set to 12 bits (12 bit information), and when the BW exceeds 80 MHz, information on the allocated RU is 16 bits (16 bits) information) can be set.
  • the EHT STA may indicate the RU allocation information configured as described above per 80 MHz.
  • a fixed bit size (3/4 bit) may be used regardless of BW.
  • the 3/4-bit information may be transmitted through U-SIG per 80 MHz.
  • the 3 bits of the U-SIG may be set differently.
  • the puncturing information may be transmitted through version independent information or version dependent information of the U-SIG.
  • Information on the allocated RU may include all puncturing information at 80 MHz. Accordingly, information on the allocated RU may be included in version independent information such as BW and transmitted through the U-SIG.
  • BW may be composed of only 20/40/80/160, 80+80/240, 160+80/320, or 160+160 MHz, which is information on continuous BW.
  • the BW may be configured to include puncturing information.
  • D-iii-2 For example, information on RU allocation/puncturing may be used to indicate puncturing information for 80 MHz.
  • the puncturing information for 80 MHz may be transmitted by being included in version independent information (version independent field) or version dependent information (version dependent field) of the U-SIG in units of 80 MHz.
  • puncturing information for the entire BW may be transmitted through the EHT-SIG field.
  • the BW field may not include puncturing information.
  • the U-SIG may include puncturing information for 80 MHz.
  • puncturing information for the entire BW may be indicated through the EHT-SIG field.
  • the EHT-SIG field may include puncturing information for the entire BW.
  • the EHT STA may indicate information on the allocated RU by indicating puncturing information for each 80 MHz.
  • a preamble puncturing pattern at 80 MHz may be configured as shown in Table 32.
  • the EHT STA may indicate/transmit information on preamble puncturing for BW by indicating/transmitting RUs of 242 RUs or more punctured per 80 MHz.
  • the EHT STA may indicate/transmit information on preamble puncturing per 80 MHz using 3-bit information. Therefore, there is an effect of reducing overhead.
  • the 3-bit information may be transmitted through U-SIG in units of 80 MHz.
  • the 3 bits of the U-SIG may be set differently.
  • the puncturing information may be transmitted through version independent information or version dependent information of the U-SIG.
  • the puncturing information may include all puncturing information at 80 MHz. Accordingly, the puncturing information may be transmitted through the U-SIG as version independent information such as BW.
  • the BW may be composed of only 20/40/80/160, 80+80/240, 160+80/320, or 160+160 MHz, which is information on continuous BW have
  • the BW may be configured to include puncturing information.
  • puncturing information may be used to indicate puncturing information for 80 MHz.
  • the puncturing information for 80 MHz may be transmitted by being included in version independent information (version independent field) or version dependent information (version dependent field) of the U-SIG in units of 80 MHz.
  • puncturing information for the entire BW may be transmitted through the EHT-SIG field.
  • the BW field may not include puncturing information.
  • the U-SIG may include puncturing information for 80 MHz.
  • puncturing information for the entire BW may be indicated through the EHT-SIG field.
  • the EHT-SIG field may include puncturing information for the entire BW.
  • allocation/puncturing information may be transmitted as follows.
  • the EHT STA may transmit a puncturing pattern for 80 MHz in units of 80 MHz through the U-SIG.
  • the EHT STA may indicate puncturing information for all BWs or puncturing information for other 80 MHz through the EHT-SIG for puncturing information for BW greater than 80.
  • the puncturing information may be configured in two stages.
  • the U-SIG may include only puncturing information of an 80 MHz bandwidth.
  • the EHT-SIG may include puncturing information of the entire bandwidth or puncturing information of another 80 MHz bandwidth.
  • the U-SIG of the first 80 MHz bandwidth among 160 MHz may include only puncturing information of the first 80 MHz bandwidth.
  • the EHT-SIG may include puncturing information of the second 80 MHz bandwidth among 160 MHz or may include puncturing information of the entire 160 MHz bandwidth.
  • the SU-PPDU (or MU PPDU) may include a user field/EHT-SIG.
  • allocation information or puncturing information for the RU combination may be included in the user field/EHT-SIG.
  • the user field/EHT-SIG may be configured to include RU allocation information or puncturing information like the common field of 11ax HE-SIGB.
  • the user field/EHT-SIG may include a CRC and a tail bit.
  • the user field/EHT-SIG may include user specific information.
  • the user field/EHT-SIG may be configured to include one STA-ID.
  • the User field may be located after the EHT-SIGA or after the U-SIG when there is no EHT-SIGA.
  • the puncturing information may include puncturing information for the entire BW.
  • the User field/EHT-SIG may be configured in units of 20 MHz/40 MHz.
  • the User field/EHT-SIG may be transmitted by duplication during wide bandwidth transmission.
  • User field/EHT-SIG may have different configuration granularity according to transmission BW.
  • user field/EHT-SIG may be configured in units of 20 MHz up to 160 MHz, and user field/EHT-SIG may be configured and transmitted in units of 40 MHz for BW above 240 MHz.
  • the granularity may be indicated through the U-SIG. In this case, 1 bit may be used to indicate the granularity.
  • the BW field of the U-SIG is 20,40,80,160/80+80,240/160+80,160+160/320 MHz It may be composed of 3 bits to represent
  • bit table including BW and RU allocation information may be transmitted through the U-SIG of the EHT-PPDU.
  • U-SIG information may be set differently for every 80 MHz.
  • the RU allocation information/puncturing information may be transmitted while being included in the EHT-SIGA during SU transmission.
  • the EHT-SIGA may be configured with a common control field and an RU allocation bit/puncturing bit during SU transmission.
  • the information is jointly encoded and may include one CRC and a tail bit.
  • EHT-SIGA can be applied with the same modulation and code rate as 11ax HE-SIGA.
  • the EHT STA may indicate/transmit RU allocation/preamble puncturing information using BW and empty allocation information.
  • the EHT STA may indicate non-continuous BW/preamble puncture BW by using the BW field.
  • Detailed allocation information may be indicated using the RU allocation table.
  • Allocation for indicating information on M-RU aggregation/preamble puncturing may consist of 8 bits as in the 802.11ax standard, or 3/4/5 bits in consideration of only the allocated combination. Allocation for indicating information on M-RU aggregation/preamble puncturing may be configured differently according to a value of the BW field.
  • the BW field may be configured as follows.
  • an example of the BW field in SU transmission to support Multi-RU allocation may be described.
  • the EHT STA may indicate non-continuous BW/preamble puncture BW based on 20 MHz.
  • the BW field may be configured as shown in Table 33.
  • the BW field on SU-transmission to support multi-RU allocation may be configured as shown in Tables 34 and 35.
  • the BW may be configured as shown in Table 36 including the puncturing case of the secondary channel and the indication of the primary channel (eg, 40 MHz/80 MHz).
  • the BW may be configured with 4 bits.
  • the above-described examples are only examples, and in order to support more combinations, the BW field may be extended to 5 bits. Accordingly, the EHT STA may perform an indication of various combinations of RUs through the BW field.
  • the RU allocation information may be configured as follows in order to inform detailed allocation information for the allocated RUs.
  • the EHT STA may transmit RU allocation information using the RU allocation 8-bit table defined in the 11ax standard.
  • the EHT STA may indicate/transmit information on non-allocated RUs/allocated RUs using an allocation table.
  • allocation information for SU transmission may be configured and used during SU transmission.
  • the EHT STA may indicate/transmit information on non-Allocated RUs/allocated RUs using the above-described allocation method.
  • A-iii-2-B-i For example, information on RUs/allocated RUs that are not allocated on the basis of 20 MHz per 80 MHz may be indicated. That is, information on non-allocated RUs/allocated RUs may be indicated through the second embodiment.
  • information on non-allocated RUs/allocated RUs may be indicated using a table that considers RU combinations per 80 MHz. That is, information on non-allocated RUs/allocated RUs may be indicated through the third embodiment.
  • A-iii-2-B-iii Information on non-allocated RUs/allocated RUs may be indicated using an allocation bit map composed of only allocation combinations supported by BW among the combinations listed in the first embodiment.
  • the allocation bit map may consist of 3/4/5 bits.
  • the allocation field according to the above-described BW configuration may be configured as follows.
  • A-iii-2-B-iii-1-A punctured or unassigned 20 MHz may be indicated as 0 in the allocation information.
  • the allocated 20 MHz may be indicated by 1.
  • the allocation information may consist of 5 bits.
  • An example of this may be configured as shown in Table 37.
  • Allocation information may be configured as shown in Table 38.
  • Allocation information may be configured as shown in Table 39.
  • RU allocation/puncturing information may be configured and transmitted as follows.
  • the SU-PPDU (or MU PPDU) may include a user field/EHT-SIG.
  • allocation information for the RU combination may be included in the user field/EHT-SIG.
  • the user field/EHT-SIG may be configured to include RU allocation information like the common field of 11ax HE-SIGB.
  • the user field/EHT-SIG may include a CRC and a tail bit.
  • the user field/EHT-SIG may include user specific information.
  • the user field/EHT-SIG may be configured to include one STA-ID.
  • the User field may be located after the EHT-SIGA or after the U-SIG when there is no EHT-SIGA.
  • the User field/EHT-SIG may be configured in units of 20 MHz/40 MHz.
  • the User field/EHT-SIG may be transmitted by duplication during wide bandwidth transmission.
  • User field/EHT-SIG may have different configuration granularity according to transmission BW.
  • user field/EHT-SIG may be configured in units of 20 MHz up to 160 MHz, and user field/EHT-SIG may be configured and transmitted in units of 40 MHz for BW above 240 MHz.
  • the granularity may be indicated through the U-SIG. In this case, 1 bit may be used to indicate the granularity.
  • the RU allocation information may be transmitted while being included in the EHT-SIGA during SU transmission.
  • the EHT-SIGA may be configured with a common control field and an RU allocation bit during SU transmission.
  • the information is jointly encoded and may include one CRC and a tail bit.
  • some combinations may be allocated during SU transmission as follows.
  • bits reserved in the RU allocation table of HE-SIGB may be used to indicate the allocation.
  • the primary 20 is configured as the first 20 MHz.
  • allocation may be configured differently according to the location of P20.
  • Allocation according to the embodiment may be configured as shown in Table 40.
  • 0 in the allocation may mean 242/484/996 RUs that are not allocated.
  • index 15 and index 21 having the same meaning as continuous 160 MHz/continuous 240 MHz may be excluded.
  • a reserved bit of the RU-allocation table may be used for the indication of the M-RU of A. For example, bits for index 224-255 (111x4x3x2x1x0) may be used.
  • the RU allocation bit may be transmitted through U-SIG/EHT-SIG.
  • the BW field may consist of 6 bits.
  • the BW field and information included in the BW field may be configured as shown in Tables 41 and 42.
  • the BW field may be configured with 5 bits using only some of the above configurations.
  • the BW field may be transmitted through U-SIG.
  • the EHT STA may also indicate a preamble puncturing pattern using the allocation information. Therefore, based on the M-RU indication method and the signaling method proposed in this specification, the EHT STA may perform the preamble puncturing indication.
  • information on MRU aggregation or preamble puncturing during EHT SU PPDU (or EHT MU PPDU) or non-OFDMA transmission (except the Full bandwidth MU-MIMO) may be indicated as follows.
  • An example of RU allocation or puncturing pattern according to BW may be configured as shown in Table 43.
  • the maximum number of cases per BW may be 12. Therefore, the MRU aggregation/puncturing indication for each BW may be configured with 4 bits.
  • a location of the RU defined/configured according to the BW may be described.
  • a location of an RU configured based on 4-bit information at 80 MHz may be configured as shown in Table 44.
  • a location of an RU configured based on 4-bit information at 160 MHz may be configured as shown in Table 45.
  • the location of the RU configured based on 4 bit information at 240 MHz may be configured as shown in Table 46.
  • the location of the RU configured based on 4 bit information at 320 MHz may be configured as shown in Table 47.
  • bit information of a subfield (4 bits) indicating MRU aggregation/puncturing may be set differently according to BW.
  • the subfield indicating the MRU aggregation/puncturing may be included in the U-SIG or the EHT-SIG.
  • a subfield may be configured including information on all MRU aggregation/puncturing.
  • the subfield may include all indications for each BW in the above (ie, 37 cases) and may be composed of 6 bits.
  • 6-bit information for the MRU aggregation/puncturing information may be configured as shown in Table 48.
  • an indication for MRU aggregation/puncturing pattern was configured in consideration of 240 MHz BW.
  • 240 MHz BW may be configured as puncturing for 320 MHz BW.
  • the indication may be configured in consideration of the MRU aggregation/puncturing pattern configured for the 240 MHz as the MRU aggregation/puncturing pattern for 320 MHz.
  • the MRU aggregation/puncturing pattern for 320 MHz may be configured with 42 cases as follows. Therefore, the MRU aggregation/puncturing pattern may be composed of 6 bits as follows to support 320 MHz.
  • the location of the RU configured based on 6-bit information at 320 MHz may be configured as shown in Table 49.
  • the 6-bit MRU aggregation/puncturing pattern may be transmitted including different information according to the BW.
  • the EHT STA may indicate for the MRU aggregation/puncturing pattern by configuring one MRU aggregation/puncturing pattern indication including all cases.
  • the MRU aggregation/puncturing pattern indication may be configured with 6 bits.
  • the 6-bit MRU aggregation/puncturing pattern indication may be configured as shown in Tables 50 and 51.
  • the MRU aggregation/puncturing pattern for 240 MHz may not be considered.
  • the MRU aggregation/puncturing pattern indication may be configured with 5 bits except for the indication for 240 mhz in the example of 2 above.
  • the MRU aggregation/puncturing pattern indication composed of the 5-bit may be configured as shown in Table 52.
  • the information on the MRU aggregation/puncturing pattern during SU/non-OFDMA transmission may be transmitted through the U-SIG and the EHT-SIG as follows.
  • the EHT STA may transmit a puncturing pattern for 80 MHz in units of 80 MHz through the U-SIG. In order to indicate the puncturing information for the BW greater than 80 MHz, the EHT STA may indicate puncturing information for all or other 80 MHz through the EHT-SIG.
  • the puncturing information for 80 MHz included in the U-SIG may be included in version independent information of the U-SIG.
  • the 80MHz puncturing indication bit may consist of 2/3 bits.
  • the indication information for the MRU aggregation/puncturing may be transmitted through the EHT-SIG.
  • MRU aggregation/puncturing information included in the EHT-SIG may be configured without including MRU aggregation/puncturing for 80 MHz.
  • the 80 MHz SU-PPDU may not include the MRU aggregation/puncturing indication field in the EHT-SIG. That is, in the case of 80 MHz, the subfield for MRU aggregation/puncturing indication may not be transmitted in the EHT-SIG.
  • a subfield of the EHT-SIG indicating MRU aggregation/puncturing may be set to a specific value (or a specific bit index).
  • the subfield of EHT-SIG may be set to 11m11. That is, all bits of the subfield of the EHT-SIG may be set to 1.
  • the EHT STA may indicate the entire MRU aggregation/puncturing pattern through the U-SIG.
  • 24 is a flowchart for explaining an operation of a transmitting STA.
  • the transmitting STA may generate a PPDU.
  • the transmitting STA may generate a PPDU including the first signal field and the second signal field.
  • the first signal field may include a U-SIG.
  • the second signal field may include EHT-SIG.
  • the first signal field and the second signal field may be encoded, respectively.
  • two symbols may be jointly encoded.
  • the first signal field and the second signal field may be modulated, respectively.
  • the PPDU may further include an L-SIG field and a RL-SIG field.
  • the RL-SIG field may be consecutive to the L-SIG field.
  • the first signal field may be consecutive to the RL-SIG field.
  • the second signal field may be continuous to the first signal field.
  • the transmitting STA may set the value of the length field of the L-SIG field based on the transmission time of the PPDU.
  • the result of "modulo 3 operation" on the value of the length field of the L-SIG field may be set to 0.
  • the RL-SIG field may be configured such that the L-SIG field is repeated.
  • the RL-SIG field includes the same information field as the L-SIG field and may be modulated in the same manner.
  • the L-SIG field and the RL-SIG field may be modulated through BPSK, respectively.
  • the first signal field may include information about a version of the PPDU.
  • Information on the version (version) of the PPDU may be determined based on whether the PPDU is an EHT PPDU.
  • the information about the version (version) of the PPDU may be composed of 3-bit information.
  • the information on the version of the PPDU may include information indicating that the PPDU is a PPDU (ie, an EHT PPDU) based on the EHT standard.
  • the information about the version of the PPDU may include information for distinguishing the PPDU according to the 802.11be standard (ie, the EHT standard) or later.
  • the information on the version of the PPDU may include information for classifying the EHT standard and the PPDU according to the standard determined/generated/established after the EHT standard. That is, the information about the version of the PPDU may include information indicating that the PPDU is an EHT standard or a PPDU after the EHT standard.
  • the type of the PPDU and the version of the PPDU may be used separately.
  • the type of PPDU may be used to distinguish the PPDU according to the EHT standard and the standard before the EHT standard (eg, 802.11n/ac/ax).
  • the version of the PPDU may be used to distinguish the PPDU according to the EHT standard and the standard after the EHT standard.
  • the version of the PPDU may be called variously.
  • the version of the PPDU may be referred to as a PHY version, a Packet version, a Packet identifier, and a Wi-Fi version.
  • the first signal field may further include information on basic service set (BSS) color and information on transmission opportunity (TXOP).
  • BSS basic service set
  • TXOP transmission opportunity
  • the information on the BSS color may be set as various bit information.
  • the information on the BSS color may be set as 6-bit information.
  • the information about the TXOP may be set to various bit information.
  • information on TXOP may be set as 7-bit information.
  • the first signal field may include 4-bit information about the preamble puncturing pattern of the 80 MHz bandwidth among the entire bandwidth of the PPDU.
  • the receiving STA may identify a preamble puncturing pattern of an 80 MHz bandwidth among the entire bandwidth of the PPDU based on the 4-bit information.
  • the 4-bit information may include first information on whether puncturing is applied in units of 20 MHz among the 80 MHz bandwidth.
  • the 4-bit information may include first bit information to fourth bit information.
  • the 4-bit information may be configured as [x1 x2 x3 x4].
  • x1 may mean first bit information.
  • x2 may mean second bit information.
  • x3 may mean third bit information.
  • x4 may mean fourth bit information.
  • the first bit information of the 4-bit information may include information on whether preamble puncturing is applied to the first 20 MHz bandwidth of the 80 MHz bandwidth. For example, based on whether the first bit information is a first value, it may be determined whether preamble puncturing is applied to the first 20 MHz bandwidth.
  • preamble puncturing may be applied to the first 20 MHz bandwidth.
  • preamble puncturing may not be applied to the first 20 MHz bandwidth.
  • the second bit information of the 4-bit information may include information on whether preamble puncturing is applied to the second 20 MHz bandwidth of the 80 MHz bandwidth. For example, based on whether the second bit information is the first value, it may be determined whether preamble puncturing is applied to the second 20 MHz bandwidth.
  • preamble puncturing may be applied to the second 20 MHz bandwidth.
  • preamble puncturing may not be applied to the second 20 MHz bandwidth.
  • the third bit information of the 4-bit information may include information on whether preamble puncturing is applied to the third 20 MHz bandwidth of the 80 MHz bandwidth. For example, based on whether the third bit information is the first value, it may be determined whether preamble puncturing is applied to the third 20 MHz bandwidth.
  • preamble puncturing may be applied to the third 20 MHz bandwidth.
  • preamble puncturing may not be applied to the third 20 MHz bandwidth.
  • the fourth bit information of the 4 bit information may include information on whether preamble puncturing is applied to the fourth 20 MHz bandwidth among the 80 MHz bandwidth. For example, based on whether the fourth bit information is the first value, it may be determined whether preamble puncturing is applied to the fourth 20 MHz bandwidth.
  • preamble puncturing may be applied to the fourth 20 MHz bandwidth.
  • preamble puncturing may not be applied to the fourth 20 MHz bandwidth.
  • the second signal field may include second information about the preamble puncturing pattern of the entire bandwidth of the PPDU.
  • the second signal field may include a common field and a user specific field.
  • the second information may be included in the general field.
  • the first signal field may further include a bandwidth field related to the total bandwidth of the PPDU.
  • the first information and/or the second information may not be included in the bandwidth field.
  • the above-described 4-bit information may be configured as a field independent of the bandwidth field in the first signal field.
  • the above-described second information may be configured as an independent field within the second signal field.
  • the second signal field may be configured by being duplicated within the entire bandwidth of the PPDU in units of the first bandwidth.
  • the information about the first bandwidth may be included in the first signal field.
  • the transmitting STA may transmit information about the first bandwidth through the first signal field.
  • the transmitting STA may configure the PPDU by duplicating the second signal field in the unit of the first bandwidth.
  • the first bandwidth may be set to either 20 MHz or 40 MHz.
  • the transmitting STA may transmit a PPDU. That is, the transmitting STA may transmit the generated PPDU.
  • each field included in the PPDU may be transmitted through a symbol.
  • the L-SIG field may be transmitted through the first symbol.
  • the RL-SIG field may be transmitted through a second symbol consecutive to the first symbol.
  • the first signal field may be transmitted through a third symbol consecutive to the second symbol.
  • the second signal field may be transmitted through a fourth symbol consecutive to the third symbol.
  • the first symbol may consist of one symbol.
  • the second symbol may consist of one symbol.
  • the third symbol may consist of two symbols. Accordingly, the first signal field may be transmitted through two symbols.
  • the fourth symbol may consist of at least one or at least one or more symbols. Accordingly, the second signal field may be transmitted through at least one or more symbols consecutive to two symbols through which the first signal field is transmitted.
  • 25 is a flowchart illustrating an operation of a receiving STA.
  • a receiving STA may receive a PPDU.
  • the transmitting STA may generate a PPDU including the first signal field and the second signal field.
  • the first signal field may include a U-SIG.
  • the second signal field may include EHT-SIG.
  • the first signal field and the second signal field may be encoded, respectively.
  • two symbols may be jointly encoded.
  • the first signal field and the second signal field may be modulated, respectively.
  • the PPDU may further include an L-SIG field and a RL-SIG field.
  • the RL-SIG field may be consecutive to the L-SIG field.
  • the first signal field may be consecutive to the RL-SIG field.
  • the second signal field may be continuous to the first signal field.
  • each field included in the PPDU may be received through a symbol.
  • the L-SIG field may be received through the first symbol.
  • the RL-SIG field may be received through a second symbol consecutive to the first symbol.
  • the first signal field may be received through a third symbol consecutive to the second symbol.
  • the second signal field may be received through a fourth symbol consecutive to the third symbol.
  • the first symbol may consist of one symbol.
  • the second symbol may consist of one symbol.
  • the third symbol may consist of two symbols. Accordingly, the first signal field may be received through two symbols.
  • the fourth symbol may consist of at least one or at least one or more symbols. Accordingly, the second signal field may be received through at least one or more consecutive symbols from two symbols in which the first signal field is received.
  • the value of the length field of the L-SIG field may be set based on the transmission time of the PPDU.
  • the result of "modulo 3 operation" on the value of the length field of the L-SIG field may be set to 0.
  • the RL-SIG field may be configured such that the L-SIG field is repeated.
  • the RL-SIG field includes the same information field as the L-SIG field and may be modulated in the same manner.
  • the L-SIG field and the RL-SIG field may be modulated through BPSK, respectively.
  • the first signal field may include information about a version of the PPDU.
  • Information on the version (version) of the PPDU may be determined based on whether the PPDU is an EHT PPDU.
  • the information about the version (version) of the PPDU may be composed of 3-bit information.
  • the information on the version of the PPDU may include information indicating that the PPDU is a PPDU (ie, an EHT PPDU) based on the EHT standard.
  • the information about the version of the PPDU may include information for distinguishing the PPDU according to the 802.11be standard (ie, the EHT standard) or later.
  • the information on the version of the PPDU may include information for classifying the EHT standard and the PPDU according to the standard determined/generated/established after the EHT standard. That is, the information about the version of the PPDU may include information indicating that the PPDU is an EHT standard or a PPDU after the EHT standard.
  • the type of the PPDU and the version of the PPDU may be used separately.
  • the type of PPDU may be used to distinguish the PPDU according to the EHT standard and the standard before the EHT standard (eg, 802.11n/ac/ax).
  • the version of the PPDU may be used to distinguish the PPDU according to the EHT standard and the standard after the EHT standard.
  • the version of the PPDU may be called variously.
  • the version of the PPDU may be referred to as a PHY version, a Packet version, a Packet identifier, and a Wi-Fi version.
  • the first signal field may further include information on basic service set (BSS) color and information on transmission opportunity (TXOP).
  • BSS basic service set
  • TXOP transmission opportunity
  • the information on the BSS color may be set as various bit information.
  • the information on the BSS color may be set as 6-bit information.
  • the information about the TXOP may be set to various bit information.
  • information on TXOP may be set as 7-bit information.
  • the first signal field may include 4-bit information about the preamble puncturing pattern of the 80 MHz bandwidth among the entire bandwidth of the PPDU.
  • the receiving STA may identify a preamble puncturing pattern of an 80 MHz bandwidth among the entire bandwidth of the PPDU based on the 4-bit information.
  • the 4-bit information may include first information on whether puncturing is applied in units of 20 MHz among the 80 MHz bandwidth.
  • the 4-bit information may include first bit information to fourth bit information.
  • the 4-bit information may be configured as [x1 x2 x3 x4].
  • x1 may mean first bit information.
  • x2 may mean second bit information.
  • x3 may mean third bit information.
  • x4 may mean fourth bit information.
  • the first bit information of the 4-bit information may include information on whether preamble puncturing is applied to the first 20 MHz bandwidth of the 80 MHz bandwidth. For example, based on whether the first bit information is a first value, it may be determined whether preamble puncturing is applied to the first 20 MHz bandwidth.
  • preamble puncturing may be applied to the first 20 MHz bandwidth.
  • preamble puncturing may not be applied to the first 20 MHz bandwidth.
  • the second bit information of the 4-bit information may include information on whether preamble puncturing is applied to the second 20 MHz bandwidth of the 80 MHz bandwidth. For example, based on whether the second bit information is the first value, it may be determined whether preamble puncturing is applied to the second 20 MHz bandwidth.
  • preamble puncturing may be applied to the second 20 MHz bandwidth.
  • preamble puncturing may not be applied to the second 20 MHz bandwidth.
  • the third bit information of the 4-bit information may include information on whether preamble puncturing is applied to the third 20 MHz bandwidth of the 80 MHz bandwidth. For example, based on whether the third bit information is the first value, it may be determined whether preamble puncturing is applied to the third 20 MHz bandwidth.
  • preamble puncturing may be applied to the third 20 MHz bandwidth.
  • preamble puncturing may not be applied to the third 20 MHz bandwidth.
  • the fourth bit information of the 4 bit information may include information on whether preamble puncturing is applied to the fourth 20 MHz bandwidth among the 80 MHz bandwidth. For example, based on whether the fourth bit information is the first value, it may be determined whether preamble puncturing is applied to the fourth 20 MHz bandwidth.
  • preamble puncturing may be applied to the fourth 20 MHz bandwidth.
  • preamble puncturing may not be applied to the fourth 20 MHz bandwidth.
  • the second signal field may include second information about the preamble puncturing pattern of the entire bandwidth of the PPDU.
  • the second signal field may include a common field and a user specific field.
  • the second information may be included in the general field.
  • the first signal field may further include a bandwidth field related to the total bandwidth of the PPDU.
  • the first information and/or the second information may not be included in the bandwidth field.
  • the above-described 4-bit information may be configured as a field independent of the bandwidth field in the first signal field.
  • the above-described second information may be configured as an independent field within the second signal field.
  • the second signal field may be configured by being duplicated within the entire bandwidth of the PPDU in units of the first bandwidth.
  • the information about the first bandwidth may be included in the first signal field. Accordingly, the receiving STA may obtain/identify information about the first bandwidth through the first signal field. In addition, the receiving STA may identify that the PPDU is duplicated in the first bandwidth unit using the second signal field.
  • the first bandwidth may be set to either 20 MHz or 40 MHz.
  • the receiving STA may decode the PPDU.
  • the receiving STA may decode the PPDU based on the first signal field and the second signal field.
  • the technical features of the present specification described above may be applied to various devices and methods.
  • the above-described technical features of the present specification may be performed/supported through the apparatus of FIGS. 1 and/or 19 .
  • the technical features of the present specification described above may be applied only to a part of FIGS. 1 and/or 19 .
  • the technical features of the present specification described above are implemented based on the processing chips 114 and 124 of FIG. 1 , or implemented based on the processors 111 and 121 and the memories 112 and 122 of FIG. 1 , or , may be implemented based on the processor 610 and the memory 620 of FIG. 19 .
  • the apparatus of the present specification includes a processor and a memory connected to the processor, wherein the processor transmits a physical layer protocol data unit (PPDU) including a first signal field and a second signal field from a transmitting STA. obtained, wherein the first signal field includes 4-bit information about a preamble puncturing pattern of an 80 MHz bandwidth among the entire bandwidth of the PPDU, and the 4-bit information is applied in units of 20 MHz of the 80 MHz bandwidth.
  • first information on whether or not, the second signal field includes second information on a preamble puncturing pattern of the full bandwidth, and based on the first signal field and the second signal field, the It may be configured to decode the PPDU.
  • CRM computer readable medium
  • CRM computer readable medium
  • a physical layer protocol data unit including a first signal field and a second signal field from a transmitting STA, wherein the first signal field is the entirety of the PPDU.
  • 4 bit information about the preamble puncturing pattern of the 80 MHz bandwidth of the bandwidth wherein the 4 bit information includes first information on whether puncturing is applied in units of 20 MHz of the 80 MHz bandwidth, the first
  • the 2 signal field includes second information about the preamble puncturing pattern of the entire bandwidth; and decoding the PPDU based on the first signal field and the second signal field.
  • the instructions stored in the CRM of the present specification may be executed by at least one processor.
  • At least one processor related to CRM in the present specification may be the processors 111 and 121 or the processing chips 114 and 124 of FIG. 1 , or the processor 610 of FIG. 19 .
  • the CRM of the present specification may be the memories 112 and 122 of FIG. 1 , the memory 620 of FIG. 19 , or a separate external memory/storage medium/disk.
  • Machine learning refers to a field that defines various problems dealt with in the field of artificial intelligence and studies methodologies to solve them. do. Machine learning is also defined as an algorithm that improves the performance of a certain task through constant experience.
  • An artificial neural network is a model used in machine learning, and may refer to an overall model having problem-solving ability, which is composed of artificial neurons (nodes) that form a network by combining synapses.
  • An artificial neural network may be defined by a connection pattern between neurons of different layers, a learning process that updates model parameters, and an activation function that generates an output value.
  • 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 neurons and synapses connecting neurons. In the artificial neural network, each neuron may output a function value of an activation function for input signals, weights, and biases input through synapses.
  • Model parameters refer to parameters determined through learning, and include the weight of synaptic connections and the bias of neurons.
  • the hyperparameter refers to a parameter to be set before learning in a machine learning algorithm, and includes a learning rate, the number of iterations, a mini-batch size, an initialization function, and the like.
  • the purpose of learning the artificial neural network can be seen as determining the model parameters that minimize the loss function.
  • the loss function may be used as an index for determining optimal model parameters in the learning process of the artificial neural network.
  • Machine learning can be classified into supervised learning, unsupervised learning, and reinforcement learning according to a learning method.
  • Supervised learning refers to a method of training an artificial neural network in a state where a label for the training data is given, and the label is the correct answer (or result value) that the artificial neural network should infer when the training data is input to the artificial neural network.
  • Unsupervised learning may refer to a method of training an artificial neural network in a state where no labels are given for training data.
  • Reinforcement learning can refer to a learning method in which an agent defined in an environment learns to select an action or sequence of actions that maximizes the cumulative reward in each state.
  • machine learning implemented as a deep neural network (DNN) including a plurality of hidden layers is also called deep learning, and deep learning is a part of machine learning.
  • DNN deep neural network
  • machine learning is used in a sense including deep learning.
  • a robot can mean a machine that automatically handles or operates a task given by its own capabilities.
  • a robot having a function of recognizing an environment and performing an operation by self-judgment may be referred to as an intelligent robot.
  • Robots can be classified into industrial, medical, home, military, etc. depending on the purpose or field of use.
  • the robot may be provided with a driving unit including an actuator or a motor to perform various physical operations such as moving the robot joints.
  • the movable robot includes a wheel, a brake, a propeller, and the like in the driving unit, and can travel on the ground or fly in the air through the driving unit.
  • the extended reality is a generic term for virtual reality (VR), augmented reality (AR), and mixed reality (MR).
  • VR technology provides only CG images of objects or backgrounds in the real world
  • AR technology provides virtual CG images on top of images of real objects
  • MR technology is a computer that mixes and combines virtual objects in the real world. graphic technology.
  • MR technology is similar to AR technology in that it shows both real and virtual objects. However, there is a difference in that in AR technology, a virtual object is used in a form that complements a real object, whereas in MR technology, a virtual object and a real object are used with equal characteristics.
  • HMD Head-Mount Display
  • HUD Head-Up Display
  • mobile phone tablet PC, laptop, desktop, TV, digital signage, etc.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon divers modes de réalisation de l'invention, une STA de réception peut recevoir une unité de données de protocole de couche physique (PPDU) contenant un premier champ de signal et un deuxième champ de signal en provenance d'une STA de transmission. Le premier champ de signal peut comprendre des informations à 4 bits concernant un motif de perforation de préambule dans une largeur de bande de 80 MHz de la largeur de bande totale de la PPDU. Le deuxième champ de signal peut comprendre des deuxièmes informations concernant un motif de perforation de préambule de la largeur de bande totale.
PCT/KR2020/017644 2019-12-05 2020-12-04 Procédé de transmission de signal par perforation de préambule dans un système de communication sans fil WO2021112621A1 (fr)

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