Spatial multiplexing transmission in wireless local area network

Abstract

Apparatuses, methods, and systems for parametric spatial multiplexing (PSR). A parameterized spatial multiplexing receive (PSRR) physical layer protocol data unit (PPDU) including a trigger frame is received from an access point (AP). In response to the PSRR PPDU, a PSR opportunity is identified and a PSR-based backoff procedure is initiated based on the PSR opportunity. A parameterized spatial multiplexing transmit (PSRT) PPDU is transmitted. Apparatuses, methods, and systems for enhanced spatial multiplexing (ESR). In one embodiment, an enhanced spatial multiplexing receive (ESRR) physical protocol data unit (PPDU) is received, the ESRR PPDU including a trigger frame indicating that at least one sub-channel can be punctured and a duration of ESR operation. Based on the ESRR PPDU, an Enhanced Spatial Multiplexing Transmission (ESRT) PPDU is transmitted on at least one perforated sub-channel on an ESR opportunity. A response to the ESRT PPDU is received on the at least one perforated sub-channel.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of U.S. Provisional Application No. 63 / 328,550, filed on April 7, 2022, and U.S. Provisional Application No. 63 / 331,378, filed on April 15, 2022, the contents of each of which are incorporated herein by reference. Background Art

[0003] A wireless local area network (WLAN) in infrastructure basic service set (BSS) mode has an access point (AP) for the BSS and one or more stations (STAs) associated with the AP. The AP typically has access or an interface to a distribution system (DS) or another type of wired / wireless network that carries traffic to and from the BSS. Traffic originating from outside the BSS and directed to the STA arrives through the AP and is delivered to the STA. Traffic originating from the STA and directed to a destination outside the BSS is transmitted to the AP to be delivered to the corresponding destination. Traffic between STAs within the BSS can also be transmitted through the AP, where the source STA transmits traffic to the AP, and the AP delivers the traffic to the destination STA. Summary of the invention

[0004] Some specific implementations provide devices, methods, and systems for parameterized spatial multiplexing (PSR). A parameterized spatial multiplexing reception (PSRR) physical layer protocol data unit (PPDU) including a trigger frame is received from an access point (AP). In response to the PSRR PPDU, a PSR opportunity is identified, and a PSR-based backoff process is started based on the PSR opportunity. A parameterized spatial multiplexing transmission (PSRT) PPDU is sent. Some specific implementations provide devices, methods, and systems for enhanced spatial multiplexing (ESR). An enhanced spatial multiplexing reception (ESRR) physical protocol data unit PPDU is received, the ESRR PPDU including a trigger frame indicating that at least one subchannel can be punctured, and the duration of the ESR operation. Based on the ESRR PPDU, an enhanced spatial multiplexing transmission (ESRT) PPDU is sent on at least one punctured subchannel on the ESR opportunity. A response to the ESRT PPDU is received on the at least one punctured subchannel. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] A more detailed understanding may be obtained from the following description given by way of example in conjunction with the accompanying drawings, in which like reference numerals indicate like elements, and in which:

[0006] Figure 1A is a system diagram illustrating an example communication system in which one or more disclosed embodiments may be implemented;

[0007] Figure 1B is an example of an embodiment in which Figure 1A A system diagram of an example wireless transmit / receive unit (WTRU) for use within the illustrated communication system;

[0008] Figure 1C is an example of an embodiment in which Figure 1A a system diagram of an example Radio Access Network (RAN) and an example Core Network (CN) used within the illustrated communication system;

[0009] Figure 1D is an example of an embodiment in which Figure 1A A system diagram of another example RAN and another example CN used within the illustrated communication system;

[0010] Figure 2 is a diagram illustrating an example trigger frame format;

[0011] Figure 3 is a diagram illustrating an example common information field format;

[0012] Figure 4 is a diagram illustrating an example user information field format;

[0013] Figure 5 is a diagram illustrating an example backward-compatible trigger frame;

[0014] Figure 6 is a diagram illustrating an example format of a UL spatial multiplexing subfield;

[0015] Figure 7 is a diagram illustrating an example PSR process;

[0016] Figure 8 is a diagram illustrating an exemplary enhanced PSR process;

[0017] Fig. 9 is a diagram illustrating an example modified CAS control subfield format;

[0018] Fig.10 is a diagram illustrating an example enhanced PSR process with a synchronization end point;

[0019] Fig.11 is a diagram illustrating an example enhanced PSR process with delayed response;

[0020] Fig.12 is a diagram illustrating an example process including conditional delayed response transmission;

[0021] Fig.13is a diagram illustrating a process in which one PSRT PPDU is followed by multiple aggregated MAC protocol data units (A-MPDUs) from multiple STAs;

[0022] Fig.14 is a diagram illustrating a process in which a PSRT PPDU is followed by multiple block ACKs;

[0023] Fig.15 is a diagram illustrating a process in which a PSRT PPDU is followed by a trigger frame and a block acknowledgement;

[0024] Fig.16 is a diagram illustrating an example process for performing ESRT on a punctured subchannel; and

[0025] Fig.17 is a diagram illustrating an example process involving PD-based enhanced spatial multiplexing. DETAILED DESCRIPTION

[0026] Figure 1A 1 is a diagram illustrating an example communication system 100 in which one or more disclosed embodiments may be implemented. The communication system 100 may be a multiple access system that provides content such as voice, data, video, messaging, broadcast, etc. to multiple wireless users. The communication system 100 may enable multiple wireless users to access such content through sharing of system resources (including wireless bandwidth). For example, the communication system 100 may employ one or more channel access methods such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal FDMA (OFDMA), single carrier FDMA (SC-FDMA), zero tail unique word discrete Fourier transform spread OFDM (ZT-UW-DFT-S-OFDM), unique word OFDM (UW-OFDM), resource block filtered OFDM, filter bank multi-carrier (FBMC), etc.

[0027] like Figure 1AAs shown, the communication system 100 may include wireless transmit / receive units (WTRUs) 102a, 102b, 102c, 102d, a radio access network (RAN) 104, a core network (CN) 106, a public switched telephone network (PSTN) 108, the Internet 110 and other networks 112, but it should be understood that the disclosed embodiments contemplate any number of WTRUs, base stations, networks, and / or network elements. Each of the WTRUs 102a, 102b, 102c, 102d may be any type of device configured to operate and / or communicate in a wireless environment. By way of example, the WTRUs 102a, 102b, 102c, 102d (any of which may be referred to as a station (STA)) may be configured to send and / or receive wireless signals and may include user equipment (UE), a mobile station, a fixed or mobile subscriber unit, a subscription-based unit, a pager, a cellular phone, a personal digital assistant (PDA), a smart phone, a laptop, a netbook, a personal computer, a wireless sensor, a hotspot or Mi-Fi device, an Internet of Things (IoT) device, a watch or other wearable device, a head-mounted display (HMD), a vehicle, a drone, medical devices and applications (e.g., remote surgery), industrial devices and applications (e.g., robots and / or other wireless devices operating in an industrial and / or automated process chain environment), a consumer electronic device, a device operating on a commercial and / or industrial wireless network, etc. Any of the WTRUs 102a, 102b, 102c, and 102d may be interchangeably referred to as a UE.

[0028] The communication system 100 may also include a base station 114a and / or a base station 114b. Each of the base stations 114a, 114b may be any type of device configured to wirelessly interface with at least one of the WTRUs 102a, 102b, 102c, 102d to facilitate access to one or more communication networks, such as the CN 106, the Internet 110, and / or other networks 112. By way of example, the base stations 114a, 114b may be a base transceiver station (BTS), a Node B, an evolved Node B (eNB), a Home Node B, a Home evolved Node B, a next generation Node B such as a gNode B (gNB), a new radio (NR) Node B, a site controller, an access point (AP), a wireless router, and the like. While the base stations 114a, 114b are each depicted as a single element, it will be appreciated that the base stations 114a, 114b may include any number of interconnected base stations and / or network elements.

[0029] The base station 114a may be part of the RAN 104, which may also include other base stations and / or network elements (not shown), such as a base station controller (BSC), a radio network controller (RNC), a relay node, etc. The base station 114a and / or the base station 114b may be configured to send and / or receive wireless signals on one or more carrier frequencies, which may be referred to as a cell (not shown). These frequencies may be in a licensed spectrum, an unlicensed spectrum, or a combination of licensed and unlicensed spectrums. A cell may provide coverage of wireless services to a specific geographic area, which may be relatively fixed or may change over time. The cell may be further divided into cell sectors. For example, a cell associated with the base station 114a may be divided into three sectors. Therefore, in one embodiment, the base station 114a may include three transceivers, i.e., one transceiver for each sector of the cell. In an embodiment, the base station 114a may employ multiple-input multiple-output (MIMO) technology and may utilize multiple transceivers for each sector of the cell. For example, beamforming may be used to send and / or receive signals in a desired spatial direction.

[0030] The base stations 114a, 114b may communicate with one or more of the WTRUs 102a, 102b, 102c, 102d over an air interface 116, which may be any suitable wireless communication link (e.g., radio frequency (RF), microwave, centimeter wave, micrometer wave, infrared (IR), ultraviolet (UV), visible light, etc.). The air interface 116 may be established using any suitable radio access technology (RAT).

[0031] More specifically, as noted above, the communication system 100 may be a multiple access system and may employ one or more channel access schemes, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, etc. For example, the base station 114a in the RAN 104 and the WTRUs 102a, 102b, 102c may implement a radio technology, such as Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access (UTRA), that may use Wideband CDMA (WCDMA) to establish the air interface 116. WCDMA may include communication protocols, such as High Speed ​​Packet Access (HSPA) and / or Evolved HSPA (HSPA+). HSPA may include High Speed ​​Downlink (DL) Packet Access (HSDPA) and / or High Speed ​​Uplink (UL) Packet Access (HSUPA).

[0032] In an embodiment, the base station 114a and the WTRUs 102a, 102b, 102c may implement a radio technology such as Evolved UMTS Terrestrial Radio Access (E-UTRA) that may establish the air interface 116 using Long Term Evolution (LTE) and / or Advanced LTE (LTE-A) and / or Advanced LTE Pro (LTE-A Pro).

[0033] In an embodiment, the base station 114a and the WTRUs 102a, 102b, 102c may implement a radio technology (such as NR radio access) that may establish the air interface 116 using NR.

[0034] In an embodiment, the base station 114a and the WTRUs 102a, 102b, 102c may implement multiple radio access technologies. For example, the base station 114a and the WTRUs 102a, 102b, 102c may together implement LTE radio access and NR radio access, for example using the dual connectivity (DC) principle. Thus, the air interface utilized by the WTRUs 102a, 102b, 102c may be characterized by multiple types of radio access technologies and / or transmissions transmitted to / from multiple types of base stations (e.g., eNBs and gNBs).

[0035] In other embodiments, the base station 114a and the WTRUs 102a, 102b, 102c may implement radio technologies such as IEEE 802.11 (i.e., Wireless Fidelity (WiFi)), IEEE 802.16 (i.e., Worldwide Interoperability for Microwave Access (WiMAX)), CDMA2000, CDMA2000 1X, CDMA2000 EV-DO, Interim Standard 2000 (IS-2000), Interim Standard 95 (IS-95), Interim Standard 856 (IS-856), Global System for Mobile Communications (GSM), Enhanced Data rates for GSM Evolution (EDGE), GSM EDGE (GERAN), etc.

[0036] Figure 1AThe base station 114b in the may be, for example, a wireless router, a Home NodeB, a Home eNodeB, or an access point, and may utilize any suitable RAT to facilitate wireless connectivity in a local area, such as a business location, a home, a vehicle, a campus, an industrial facility, an air corridor (e.g., for use by drones), a road, and the like. In one embodiment, the base station 114b and the WTRUs 102c, 102d may implement a radio technology (such as IEEE 802.11) to establish a wireless local area network (WLAN). In an embodiment, the base station 114b and the WTRUs 102c, 102d may implement a radio technology (such as IEEE 802.15) to establish a wireless personal area network (WPAN). In yet another embodiment, the base station 114b and the WTRUs 102c, 102d may utilize a cellular-based RAT (e.g., WCDMA, CDMA2000, GSM, LTE, LTE-A, LTE-A Pro, NR, etc.) to establish a picocell or a femtocell. As Figure 1A As shown, the base station 114 b may have a direct connection to the Internet 110. Therefore, the base station 114 b may not need to access the Internet 110 via the CN 106.

[0037] The RAN 104 may be in communication with the CN 106, which may be any type of network configured to provide voice, data, applications, and / or Voice over Internet Protocol (VoIP) services to one or more of the WTRUs 102a, 102b, 102c, 102d. The data may have different quality of service (QoS) requirements, such as different throughput requirements, latency requirements, error tolerance requirements, reliability requirements, data throughput requirements, mobility requirements, etc. The CN 106 may provide call control, billing services, mobile location-based services, pre-paid calling, Internet connectivity, video distribution, etc., and / or perform high-level security functions, such as user authentication. Although not described in detail in the specification, the CN 106 may be configured to provide voice, data, applications, and / or Voice over Internet Protocol (VoIP) services to one or more of the WTRUs 102a, 102b, 102c, 102d. Figure 1A Although not shown in the figure, it will be appreciated that the RAN 104 and / or the CN 106 may be in direct or indirect communication with other RANs that employ the same RAT as the RAN 104 or a different RAT. For example, in addition to being connected to the RAN 104, which may utilize NR radio technology, the CN 106 may also be in communication with another RAN (not shown) that employs GSM, UMTS, CDMA 2000, WiMAX, E-UTRA, or WiFi radio technology.

[0038] The CN 106 may also act as a gateway for the WTRUs 102a, 102b, 102c, 102d to access the PSTN 108, the Internet 110, and / or other networks 112. The PSTN 108 may include a circuit-switched telephone network that provides plain old telephone service (POTS). The Internet 110 may include a global system of interconnected computer networks and devices that use common communication protocols, such as the Transmission Control Protocol (TCP), the User Datagram Protocol (UDP), and / or the Internet Protocol (IP) in the TCP / IP Internet protocol suite. The networks 112 may include wired communication networks and / or wireless communication networks owned and / or operated by other service providers. For example, the networks 112 may include another CN connected to one or more RANs, which may employ the same RAT as the RAN 104 or a different RAT.

[0039] Some or all of the WTRUs 102a, 102b, 102c, 102d in the communication system 100 may include multi-mode capabilities (e.g., the WTRUs 102a, 102b, 102c, 102d may include multiple transceivers for communicating with different wireless networks via different wireless links). Figure 1A The illustrated WTRU 102c may be configured to communicate with the base station 114a, which may employ a cellular-based radio technology, and with the base station 114b, which may employ an IEEE 802 radio technology.

[0040] Figure 1B is a system diagram illustrating an example WTRU 102. Figure 1B As shown, the WTRU 102 may include, among other things, a processor 118, a transceiver 120, a transmit / receive element 122, a speaker / microphone 124, a keypad 126, a display / touchpad 128, non-removable memory 130, removable memory 132, a power source 134, a global positioning system (GPS) chipset 136, and / or other peripherals 138. It will be appreciated that the WTRU 102 may include any sub-combination of the foregoing elements while remaining consistent with an embodiment.

[0041] The processor 118 may be a general purpose processor, a special purpose processor, a conventional processor, a digital signal processor (DSP), a plurality of microprocessors, one or more microprocessors associated with a DSP core, a controller, a microcontroller, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), any other type of integrated circuit (IC), a state machine, etc. The processor 118 may perform signal decoding, data processing, power control, input / output processing, and / or any other functionality that enables the WTRU 102 to operate in a wireless environment. The processor 118 may be coupled to the transceiver 120, which may be coupled to the transmit / receive element 122. Although Figure 1B The processor 118 and the transceiver 120 are depicted as separate components, but it is understood that the processor 118 and the transceiver 120 may be integrated together in an electronic package or chip.

[0042] The send / receive element 122 may be configured to send a signal to a base station (e.g., base station 114a) or receive a signal from the base station by an air interface 116. For example, in one embodiment, the send / receive element 122 may be an antenna configured to send and / or receive an RF signal. In an embodiment, the send / receive element 122 may be a transmitter / detector configured to send and / or receive, for example, IR, UV or visible light signals. In another embodiment, the send / receive element 122 may be configured to send and / or receive both RF signals and optical signals. It should be understood that the send / receive element 122 may be configured to send and / or receive any combination of wireless signals.

[0043] Although the transmit / receive element 122 Figure 1B 1 as a single element, the WTRU 102 may include any number of transmit / receive elements 122. More specifically, the WTRU 102 may employ MIMO technology. Thus, in one embodiment, the WTRU 102 may include two or more transmit / receive elements 122 (e.g., multiple antennas) for transmitting and receiving wireless signals over the air interface 116.

[0044] The transceiver 120 may be configured to modulate signals to be transmitted by the transmit / receive element 122 and to demodulate signals received by the transmit / receive element 122. As noted above, the WTRU 102 may have multi-mode capabilities. For example, the transceiver 120 may include multiple transceivers for enabling the WTRU 102 to communicate via multiple RATs, such as NR and IEEE 802.11.

[0045] The processor 118 of the WTRU 102 may be coupled to and may receive user input data from a speaker / microphone 124, a keypad 126, and / or a display / touchpad 128 (e.g., a liquid crystal display (LCD) display unit or an organic light emitting diode (OLED) display unit). The processor 118 may also output user data to the speaker / microphone 124, the keypad 126, and / or the display / touchpad 128. In addition, the processor 118 may access information from and store data in any type of suitable memory, such as a non-removable memory 130 and / or a removable memory 132. The non-removable memory 130 may include a random access memory (RAM), a read-only memory (ROM), a hard disk, or any other type of memory storage device. The removable memory 132 may include a subscriber identity module (SIM) card, a memory stick, a secure digital (SD) memory card, and the like. In other embodiments, the processor 118 may access information from and store data in a memory that is not physically located on the WTRU 102, such as on a server or a home computer (not shown).

[0046] The processor 118 may receive power from the power source 134, and may be configured to distribute and / or control power to other components in the WTRU 102. The power source 134 may be any suitable device for powering the WTRU 102. For example, the power source 134 may include one or more dry cell batteries (e.g., nickel-cadmium (NiCd), nickel-zinc (NiZn), nickel-metal hydride (NiMH), lithium-ion (Li-ion), etc.), solar cells, fuel cells, etc.

[0047] The processor 118 may also be coupled to the GPS chipset 136, which may be configured to provide location information (e.g., longitude and latitude) regarding the current location of the WTRU 102. In addition to or in lieu of the information from the GPS chipset 136, the WTRU 102 may receive location information from a base station (e.g., base stations 114a, 114b) over the air interface 116 and / or determine its location based on the timing of signals received from two or more nearby base stations. It will be appreciated that the WTRU 102 may acquire location information by any suitable location-determination method while remaining consistent with an embodiment.

[0048] The processor 118 may also be coupled to other peripherals 138, which may include one or more software modules and / or hardware modules that provide additional features, functionality, and / or wired or wireless connectivity. For example, the peripherals 138 may include an accelerometer, an electronic compass, a satellite transceiver, a digital camera (for photos and / or video), a universal serial bus (USB) port, a vibration device, a television transceiver, a hands-free headset, module, a frequency modulation (FM) radio unit, a digital music player, a media player, a video game player module, an Internet browser, a virtual reality and / or augmented reality (VR / AR) device, an activity tracker, etc. The peripheral device 138 may include one or more sensors. The sensor may be one or more of the following: a gyroscope, an accelerometer, a Hall effect sensor, a magnetometer, an orientation sensor, a proximity sensor, a temperature sensor, a time sensor; a geographic location sensor, an altimeter, a light sensor, a touch sensor, a magnetometer, a barometer, a gesture sensor, a biometric sensor, a humidity sensor, etc.

[0049] The WTRU 102 may include a full-duplex radio for which transmission and reception of some or all of the signals (e.g., associated with specific subframes for both UL (e.g., for transmission) and DL (e.g., for reception)) may be concurrent and / or simultaneous. The full-duplex radio may include an interference management unit for reducing and / or substantially eliminating self-interference via signal processing performed by hardware (e.g., a choke) or via a processor (e.g., a separate processor (not shown) or via the processor 118). In an embodiment, the WTRU 102 may include a half-duplex radio for which transmission and reception of some or all of the signals (e.g., associated with specific subframes for both UL (e.g., for transmission) or DL ​​(e.g., for reception)) may be concurrent and / or simultaneous.

[0050] Figure 1C 1 is a system diagram illustrating the RAN 104 and the CN 106 in accordance with an embodiment. As noted above, the RAN 104 may employ an E-UTRA radio technology to communicate with the WTRUs 102a, 102b, 102c over the air interface 116. The RAN 104 may also be in communication with the CN 106.

[0051] The RAN 104 may include evolved Node-Bs 160a, 160b, 160c, though it will be appreciated that the RAN 104 may include any number of evolved Node-Bs while remaining consistent with an embodiment. The evolved Node-Bs 160a, 160b, 160c may each include one or more transceivers for communicating with the WTRUs 102a, 102b, 102c over the air interface 116. In one embodiment, the evolved Node-Bs 160a, 160b, 160c may implement MIMO technology. Thus, the evolved Node-B 160a, for example, may use multiple antennas to transmit wireless signals to and / or receive wireless signals from the WTRU 102a.

[0052] Each of the evolved Node Bs 160a, 160b, 160c may be associated with a particular cell (not shown) and may be configured to handle radio resource management decisions, handover decisions, scheduling of users in UL and / or DL, etc. Figure 1C As shown, the eNode-Bs 160a, 160b, 160c may communicate with one another via an X2 interface.

[0053] Figure 1C The illustrated CN 106 may include a mobility management entity (MME) 162, a serving gateway (SGW) 164, and a packet data network (PDN) gateway (PGW) 166. Although the foregoing elements are depicted as part of the CN 106, it should be understood that any of these elements may be owned and / or operated by an entity other than the CN operator.

[0054] The MME 162 may be connected to each of the evolved Node-Bs 162a, 162b, 162c in the RAN 104 via an S1 interface and may serve as a control node. For example, the MME 162 may be responsible for authenticating users of the WTRUs 102a, 102b, 102c, bearer activation / deactivation, selecting a particular serving gateway during an initial attach of the WTRUs 102a, 102b, 102c, etc. The MME 162 may provide a control plane function for switching between the RAN 104 and other RANs (not shown) that employ other radio technologies, such as GSM and / or WCDMA.

[0055] The SGW 164 may be connected to each of the evolved Node-Bs 160a, 160b, 160c in the RAN 104 via an S1 interface. The SGW 164 may generally route and forward user data packets to / from the WTRUs 102a, 102b, 102c. The SGW 164 may perform other functions, such as anchoring the user plane during inter-evolved Node-B handover, triggering paging when DL data is available for the WTRUs 102a, 102b, 102c, managing and storing the context of the WTRUs 102a, 102b, 102c, and the like.

[0056] The SGW 164 may be connected to the PGW 166, which may provide the WTRUs 102a, 102b, 102c with access to packet-switched networks, such as the Internet 110, to facilitate communications between the WTRUs 102a, 102b, 102c and IP-enabled devices.

[0057] The CN 106 may facilitate communications with other networks. For example, the CN 106 may provide the WTRUs 102a, 102b, 102c with access to circuit-switched networks, such as the PSTN 108, to facilitate communications between the WTRUs 102a, 102b, 102c and traditional land-line communications devices. For example, the CN 106 may include, or may be in communication with, an IP gateway (e.g., an IP Multimedia Subsystem (IMS) server) that acts as an interface between the CN 106 and the PSTN 108. In addition, the CN 106 may provide the WTRUs 102a, 102b, 102c with access to other networks 112, which may include other wired networks and / or wireless networks owned and / or operated by other service providers.

[0058] Although the WTRU Figures 1A to 1D Although described as wireless terminals, it is contemplated that in certain representative embodiments, such terminals may (eg, temporarily or permanently) use a wired communications interface with a communications network.

[0059] In a representative embodiment, the other network 112 may be a WLAN.

[0060] A WLAN in infrastructure basic service set (BSS) mode may have an access point (AP) for a BSS and one or more stations (STAs) associated with the AP. The AP may have access or an interface to a distribution system (DS) or another type of wired / wireless network that carries traffic to and / or carries traffic away from the BSS. Traffic originating from outside the BSS and leading to the STA may be reached by the AP and may be delivered to the STA. Traffic originating from the STA and leading to a destination outside the BSS may be transmitted to the AP to be delivered to the corresponding destination. Traffic between STAs within the BSS may be transmitted by the AP, for example, wherein the source STA may transmit traffic to the AP, and the AP may deliver traffic to the destination STA. Traffic between STAs within the BSS may be considered and / or referred to as point-to-point traffic. Point-to-point traffic may be transmitted between the source STA and the destination STA (e.g., directly between them) using a direct link setup (DLS). In certain representative embodiments, the DLS may use 802.11e DLS or 802.11z tunnel DLS (TDLS). A WLAN using an independent BSS (IBSS) mode may not have an AP, and STAs within or using the IBSS (eg, all STAs in the STA) may communicate directly with each other. The IBSS communication mode may sometimes be referred to herein as an "ad hoc" communication mode.

[0061] When using the 802.11ac infrastructure operating mode or a similar operating mode, the AP may send beacons on a fixed channel, such as a primary channel. The primary channel may be a fixed width (e.g., a 20 MHz wide bandwidth) or a dynamically set width. The primary channel may be an operating channel of the BSS and may be used by the STA to establish a connection with the AP. In certain representative embodiments, carrier sense multiple access / collision avoidance (CSMA / CA) may be implemented, for example, in an 802.11 system. For CSMA / CA, a STA (e.g., each STA) (including the AP) may listen to the primary channel. In the case where the primary channel is listened / detected and / or determined to be busy by a specific STA, the specific STA may back off. One STA (e.g., only one station) may transmit at any given time in a given BSS.

[0062] High throughput (HT) STAs may communicate using a 40 MHz wide channel, for example, via a combination of a primary 20 MHz channel and adjacent or non-adjacent 20 MHz channels to form a 40 MHz wide channel.

[0063] Very high throughput (VHT) STA can support 20MHz, 40MHz, 80MHz and / or 160MHz wide channels. 40MHz channels and / or 80MHz channels can be formed by combining continuous 20MHz channels. 160MHz channels can be formed by combining 8 continuous 20MHz channels, or by combining two non-continuous 80MHz channels (this can be called 80+80 configuration). For 80+80 configuration, after channel coding, the data can pass through a segment parser that can divide the data into two streams. Each stream can be processed by inverse fast Fourier transform (IFFT) and time domain processing separately. These streams can be mapped to two 80MHz channels, and data can be sent by the transmitter STA. At the receiver of the receiver STA, the above-mentioned operation for the 80+80 configuration can be reversed, and the combined data can be transmitted to the medium access control (MAC).

[0064] 802.11af and 802.11ah support operating modes below 1GHz. Channel operating bandwidths and carriers are reduced in 802.11af and 802.11ah relative to those used in 802.11n and 802.11ac. 802.11af supports 5MHz, 10MHz, and 20MHz bandwidths in the TV White Space (TVWS) spectrum, and 802.11ah supports 1MHz, 2MHz, 4MHz, 8MHz, and 16MHz bandwidths using non-TVWS spectrum. According to a representative embodiment, 802.11ah may support meter type control / machine type communication (MTC), such as MTC devices in macro coverage areas. MTC devices may have certain capabilities, such as limited capabilities, including support for (e.g., only support for) certain bandwidths and / or limited bandwidths. MTC devices may include batteries with battery life above a threshold (e.g., to maintain very long battery life).

[0065] WLAN systems that can support multiple channels and channel bandwidths (such as 802.11n, 802.11ac, 802.11af, and 802.11ah) include channels that can be designated as primary channels. The primary channel may have a bandwidth equal to the maximum common operating bandwidth supported by all STAs in the BSS. The bandwidth of the primary channel may be set and / or limited by a STA (which supports the minimum bandwidth operating mode) from all STAs operating in the BSS. In the example of 802.11ah, for STAs (e.g., MTC-type devices) that support (e.g., only support) a 1MHz mode, the primary channel may be 1MHz wide, even if the AP and other STAs in the BSS support 2MHz, 4MHz, 8MHz, 16MHz, and / or other channel bandwidth operating modes. Carrier sensing and / or network allocation vector (NAV) settings may depend on the state of the primary channel. In the case where the primary channel is busy, for example, because a STA (which only supports a 1MHz operating mode) is transmitting to the AP, all available bands may be considered busy even if most of the available bands remain idle.

[0066] In the United States, the available frequency band for 802.11ah is 902MHz to 928MHz. In South Korea, the available frequency band is 917.5MHz to 923.5MHz. In Japan, the available frequency band is 916.5MHz to 927.5MHz. The total bandwidth available for 802.11ah is 6MHz to 26MHz, depending on the country code.

[0067] Figure 1D1 is a system diagram illustrating the RAN 104 and the CN 106 in accordance with an embodiment. As noted above, the RAN 104 may employ NR radio technology to communicate with the WTRUs 102a, 102b, 102c over the air interface 116. The RAN 104 may also be in communication with the CN 106.

[0068] The RAN 104 may include gNBs 180a, 180b, 180c, though it will be appreciated that the RAN 104 may include any number of gNBs while remaining consistent with an embodiment. The gNBs 180a, 180b, 180c may each include one or more transceivers for communicating with the WTRUs 102a, 102b, 102c over the air interface 116. In one embodiment, the gNBs 180a, 180b, 180c may implement MIMO technology. For example, the gNBs 180a, 180b may utilize beamforming to send signals to and / or receive signals from the gNBs 180a, 180b, 180c. Thus, the gNB 180a may, for example, use multiple antennas to send wireless signals to and / or receive wireless signals from the WTRU 102a. In an embodiment, the gNBs 180a, 180b, 180c may implement carrier aggregation technology. For example, gNB 180a may transmit multiple component carriers to WTRU 102a (not shown). A subset of these component carriers may be on unlicensed spectrum, while the remaining component carriers may be on licensed spectrum. In an embodiment, gNBs 180a, 180b, 180c may implement coordinated multi-point (CoMP) technology. For example, WTRU 102a may receive coordinated transmissions from gNB 180a and gNB 180b (and / or gNB 180c).

[0069] The WTRUs 102a, 102b, 102c may communicate with the gNBs 180a, 180b, 180c using transmissions associated with parameter sets that may be scalable. For example, OFDM symbol spacing and / or OFDM subcarrier spacing may vary for different transmissions, different cells, and / or different portions of the wireless transmission spectrum. The WTRUs 102a, 102b, 102c may communicate with the gNBs 180a, 180b, 180c using subframes or Transmission Time Intervals (TTIs) of varying or scalable lengths (e.g., containing varying numbers of OFDM symbols and / or varying absolute time lengths over time).

[0070] The gNBs 180a, 180b, 180c may be configured to communicate with the WTRUs 102a, 102b, 102c in a standalone configuration and / or a non-standalone configuration. In a standalone configuration, the WTRUs 102a, 102b, 102c may communicate with the gNBs 180a, 180b, 180c while not accessing other RANs (e.g., such as the eNodeBs 160a, 160b, 160c). In a standalone configuration, the WTRUs 102a, 102b, 102c may use one or more of the gNBs 180a, 180b, 180c as mobility anchors. In a standalone configuration, the WTRUs 102a, 102b, 102c may communicate with the gNBs 180a, 180b, 180c using signals in an unlicensed band. In a non-standalone configuration, the WTRUs 102a, 102b, 102c may communicate / connect with the gNB 180a, 180b, 180c while also communicating / connecting with another RAN, such as the eNode-B 160a, 160b, 160c. For example, the WTRUs 102a, 102b, 102c may implement the DC principle to communicate with one or more gNBs 180a, 180b, 180c and one or more eNode-Bs 160a, 160b, 160c substantially simultaneously. In a non-standalone configuration, the eNode-B 160a, 160b, 160c may act as a mobility anchor for the WTRUs 102a, 102b, 102c, and the gNB 180a, 180b, 180c may provide additional coverage and / or throughput for serving the WTRUs 102a, 102b, 102c.

[0071] Each of the gNBs 180a, 180b, 180c may be associated with a specific cell (not shown) and may be configured to handle radio resource management decisions, handover decisions, scheduling of users in UL and / or DL, support of network slicing, interworking between DC, NR, and E-UTRA, routing of user plane data towards a user plane function (UPF) 184a, 184b, routing of control plane information towards an access and mobility management function (AMF) 182a, 182b, etc. Figure 1D As shown, gNBs 180a, 180b, and 180c may communicate with each other via an Xn interface.

[0072] Figure 1D The illustrated CN 106 may include at least one AMF 182a, 182b, at least one UPF 184a, 184b, at least one session management function (SMF) 183a, 183b, and possible data networks (DNs) 185a, 185b. Although the aforementioned elements are depicted as part of the CN 106, it should be understood that any of these elements may be owned and / or operated by an entity other than the CN operator.

[0073] The AMF 182a, 182b may be connected to one or more of the gNBs 180a, 180b, 180c in the RAN 104 via the N2 interface and may act as a control node. For example, the AMF 182a, 182b may be responsible for authenticating users of the WTRU 102a, 102b, 102c, support of network slicing (e.g., handling of different protocol data unit (PDU) sessions with different requirements), selecting a specific SMF 183a, 183b, management of registration areas, termination of non-access stratum (NAS) signaling, mobility management, etc. The AMF 182a, 182b may use network slicing in order to customize CN support for the WTRU 102a, 102b, 102c based on the type of services utilized by the WTRU 102a, 102b, 102c. For example, different network slices may be established for different use cases, such as services relying on ultra-reliable low latency (URLLC) access, services relying on enhanced massive mobile broadband (eMBB) access, services for MTC access, etc. The AMF 182a, 182b may provide a control plane function for switching between the RAN 104 and other RANs (not shown) that employ other radio technologies, such as LTE, LTE-A, LTE-A Pro, and / or non-3GPP access technologies, such as WiFi.

[0074] The SMF 183a, 183b may be connected to the AMF 182a, 182b in the CN 106 via the N11 interface. The SMF 183a, 183b may also be connected to the UPF 184a, 184b in the CN 106 via the N4 interface. The SMF 183a, 183b may select and control the UPF 184a, 184b, and configure traffic routing through the UPF 184a, 184b. The SMF 183a, 183b may perform other functions such as managing and allocating UE IP addresses, managing PDU sessions, controlling policy enforcement and QoS, providing DL data notifications, etc. The PDU session type may be IP-based, non-IP-based, Ethernet-based, etc.

[0075] The UPF 184a, 184b may be connected to one or more of the gNBs 180a, 180b, 180c in the RAN 104 via the N3 interface, which may provide the WTRUs 102a, 102b, 102c with access to packet-switched networks, such as the Internet 110, to facilitate communications between the WTRUs 102a, 102b, 102c and IP-enabled devices. The UPF 184, 184b may perform other functions, such as routing and forwarding packets, enforcing user plane policies, supporting multi-homed PDU sessions, handling user plane QoS, buffering DL packets, providing mobility anchoring, etc.

[0076] The CN 106 may facilitate communications with other networks. For example, the CN 106 may include or may communicate with an IP gateway (e.g., an IP Multimedia Subsystem (IMS) server) that acts as an interface between the CN 106 and the PSTN 108. In addition, the CN 106 may provide the WTRUs 102a, 102b, 102c with access to other networks 112, which may include other wired networks and / or wireless networks owned and / or operated by other service providers. In one embodiment, the WTRUs 102a, 102b, 102c may be connected to the DNs 185a, 185b via the UPFs 184a, 184b via the N3 interfaces to the UPFs 184a, 184b and the N6 interfaces between the UPFs 184a, 184b and the local DNs 185a, 185b.

[0077] Given that Figures 1A to 1D as well as Figures 1A to 1D Corresponding to the description of the present invention, one or more or all of the functions described herein with reference to one or more of the following items may be performed by one or more simulation devices (not shown): WTRU102a-102d, base station 114a-114b, evolved Node B 160a-160c, MME 162, SGW 164, PGW 166, gNB 180a-180c, AMF 182a-182b, UPF 184a-184b, SMF 183a-183b, DN 185a-185b and / or any other device described herein. The simulation device may be one or more devices configured to mimic one or more or all of the functions described herein. For example, the simulation device may be used to test other devices and / or simulate network and / or WTRU functions.

[0078] The simulation device may be designed to implement one or more tests of other devices in a laboratory environment and / or in an operator network environment. For example, one or more simulation devices may perform one or more functions or all functions while being fully or partially implemented and / or deployed as part of a wired and / or wireless communication network in order to test other devices within the communication network. One or more simulation devices may perform one or more functions or all functions while being temporarily implemented / deployed as part of a wired and / or wireless communication network. The simulation device may be directly coupled to another device for the purpose of testing and / or performing tests using over-the-air wireless communications.

[0079] One or more simulation devices can perform one or more (including all) functions without being implemented / deployed as part of a wired and / or wireless communication network. For example, the simulation device can be used in a test scenario in a test laboratory and / or a non-deployed (e.g., testing) wired and / or wireless communication network to implement testing of one or more components. One or more simulation devices can be test equipment. Direct RF coupling and / or wireless communication via RF circuitry (e.g., which can include one or more antennas) can be used by the simulation device to send and / or receive data.

[0080] A WLAN in infrastructure basic service set (BSS) mode has an access point (AP) for the BSS and one or more stations (STAs) associated with the AP. The AP typically has access or an interface to a distribution system (DS) or another type of wired / wireless network that carries traffic to and from the BSS. Traffic originating from outside the BSS and directed to the STA arrives through the AP and is delivered to the STA. Traffic originating from the STA and directed to a destination outside the BSS is transmitted to the AP to be delivered to the corresponding destination. Traffic between STAs within the BSS can also be transmitted through the AP, where the source STA transmits traffic to the AP, and the AP delivers the traffic to the destination STA.

[0081] In some implementations, for example, when using the 802.11ac infrastructure mode of operation, the AP may send beacons on a fixed channel (typically the primary channel). This channel may be 20 MHz wide and may be the operating channel of the BSS. This channel may also be used by STAs to establish a connection with the AP. In some implementations, the channel access mechanism in the example 802.11 system is carrier sense multiple access / collision avoidance (CSMA / CA). In some implementations, in this mode of operation, each STA including the AP will listen to the primary channel. If the channel is detected to be busy, the STA "backs off". Therefore, in such implementations, only one STA may transmit at any given time in a given BSS.

[0082] In some implementations, for example, in 802.11n, high throughput (HT) STAs may also communicate using 40 MHz wide channels. In some implementations, this is achieved by combining a primary 20 MHz channel with an adjacent 20 MHz channel to form a 40 MHz wide contiguous channel.

[0083] In some implementations, for example, in 802.11ac, a very high throughput (VHT) STA may support 20MHz, 40MHz, 80MHz, and 160MHz wide channels. In some implementations, 40MHz and 80MHz channels are formed by combining continuous 20MHz channels similar to the above-mentioned 802.11n. In some implementations, a 160MHz channel is formed by combining 8 continuous 20MHz channels, or by combining two non-contiguous 80MHz channels (which may also be referred to as an 80+80 configuration). In some implementations, for the 80+80 configuration, after channel coding, the data is passed through a segment parser that divides the data into two streams. IFFT and time domain processing are performed separately for each stream. In some implementations, the streams are then mapped to two channels and the data is sent. In some implementations, at the receiver, this mechanism is reversed and the combined data is transmitted to the MAC.

[0084] Some implementations facilitate downlink multi-user (MU) MIMO (MU-MIMO) transmissions to multiple STAs within the same symbol time frame (e.g., during a downlink OFDM symbol). In some implementations, this has the advantage of improving spectral efficiency. Some such implementations are implemented in an 802.11ac or 802.11ah environment. In some implementations, interference from waveform transmissions to multiple STAs is not a problem, for example, because downlink MU-MIMO as used in 802.11ac can use the same symbol timing for multiple STAs. In some implementations, however, all STAs involved in the MU-MIMO transmission of the relevant AP use the same channel or frequency band. This may limit the operating bandwidth to the minimum channel bandwidth supported by the STAs participating in the MU-MIMO transmission of the relevant AP.

[0085] Some implementations (e.g., 802.11ax) implement trigger frames. In some implementations, trigger frames are used to allocate resources and / or trigger single-user or multi-user access.

[0086] Figure 2 is a diagram illustrating an example format of a trigger frame 200. The trigger frame includes frame control, duration, receive address (RA), transmit address (TA), common information, user information, padding, and / or frame check sequence (FCS) fields, where an example length of each field is represented in octets in the figure, where "variable" indicates that the length can be variable.

[0087] Figure 3 is a diagram illustrating an example format of the common information field 300. The common information field 300 may correspond to Figure 2Common information fields of the trigger frame 200 shown and described. Common information fields 300 include trigger type, UL length, more TF, required CS, UL bandwidth (BW), GI and HE-LTF type, MU-MIMO, HE-LTF mode, number of HE-LTF symbols and midamble periodicity, UL space-time block code (STBC), low-density parity check (LDPC) additional symbol segments, AP transmit (Tx) power, pre-forward error correction (FEC) filling factor packet extension (PE) disambiguation, uplink (UL) spatial multiplexing, Doppler, reserved UL high-efficiency signaling A2 field (HE-SIG-A2), reserved and / or trigger related common information fields, where an example length of each field is represented in bits below each field in the figure, and example start and end bit positions of each field are shown above each field.

[0088] Figure 4 400. The user information field 400 may correspond to the example format of the user information field 400. Figure 2 The user information field of the trigger frame 200 shown and described. In some implementations, the user information field 400 can be used for all trigger types except the null feedback report poll (NFRP) trigger. The format of the user information field 400 includes AID12 (12 LSBs of the association ID), resource unit (RU) allocation, UL forward error correction (FEC) decoding type, UL HE modulation and coding scheme (MCS), UL dual carrier modulation (DCM), spatial stream (SS) allocation / random access resource unit (RA-RU) information, UL target received power, reserved and / or trigger related user information fields, where an example length of each field is shown in bits below each field in the figure, and an example start and end bit position of each field is shown above each field.

[0089] Table 1 includes a trigger type subfield (e.g., Figure 3 3. Example values ​​of the trigger type subfield of the common information field format 300 shown and described above. In some implementations, the trigger type subfield indicates the type of trigger frame.

[0090] Table 1

[0091] Trigger Type subfield value Trigger frame variant 0 Basics 1 Beamforming (BF) Report Poll (BFRP) 2 Multi-User Block Acknowledgement Request (MU-BAR) 3 Multi-User Transmission Request (MU-RTS) 4 Buffer Status Report Poll (BSRP) 5 Multicast with Retry (GCR) MU-BAR 6 Bandwidth Query Report Poll (BQRP) 7 Null Data Packet (NDP) Feedback Report Poll (NFRP) 8-15 reserve

[0092] The IEEE 802.11 Extremely High Throughput (EHT) Study Group (SG) was established in September 2018. EHT is considered to be the next major revision of the IEEE 802.11 standard following 802.11ax, which is currently in the working group letter voting stage. EHT was formed to explore the possibility of further increasing peak throughput and improving the efficiency of IEEE 802.11 networks. Following the establishment of the EHT Study Group, the 802.11be Task Group (TG) was established to provide the 802.11EHT specification. The various use cases and applications addressed include high throughput and low latency applications such as video, augmented reality (AR) and / or virtual reality (VR) over WLAN.

[0093] Example features that may be relevant in EHT SG and 802.11be TG to achieve increased peak throughput and improved efficiency may include multi-AP; multi-band / multi-link; 320 MHz bandwidth; 16 spatial streams; hybrid automatic repeat request (HARQ); AP coordination; and / or a new design for 6 GHz channel access.

[0094] In some implementations, EHT may support larger BW, multi-RU (MRU) allocation, enhanced MCS, and a larger number of spatial streams. In some implementations, the trigger frame (TF) design may need to be modified to signal the allocation for these enhanced features from the AP and signal a new field of the U-SIG of the TB-PPDU. In some implementations, resource units (RUs) may be allocated in the trigger frame for use in the EHT-TB-PPDU.

[0095] In some implementations, EHT supports frequency domain aggregation of PPDUs to form an aggregated PPDU (A-PPDU). In some implementations, an A-PPDU includes multiple PPDUs. In some implementations, the PPDU format combination limits the A-PPDU to HE, EHT, or EHT+, and other combinations are to be determined (TBD). For PPDUs using HE format, the PPDU BW is TBD, the number of PPDUs is TBD, and the A-PPDU will be R2 features.

[0096] In some implementations, A-PPDUs in the UL from multiple STAs supporting different modifications may require a backward compatible trigger frame.

[0097] Figure 5is a diagram illustrating an example communication 500 between an AP 502, a HE STA 504, an EHT STA1 506, and an EHT STA2 508, wherein an example trigger frame 510 that is backward compatible with a legacy trigger frame is sent by the AP 502, and corresponding HE TB PPDUs 512 and EHT TB PPDUs 514, 516 are sent by the HE STA 504, the EHT STA1 506, and the EHT STA2 508, respectively.

[0098] Some implementations (e.g., 802.11be implementations) support multi-link operation (MLO), where if a STA supports simultaneous transmission and reception (STR) on multiple links, it can perform independent enhanced distributed channel access (EDCA) or triggered access on each link. In some implementations, the recipient of the trigger frame (TF) transmission can be a non-simultaneous transmission and reception (NSTR) non-AP multi-link device (MLD), which may not be able to transmit and receive on multiple links simultaneously.

[0099] Some implementations (e.g., 802.11be / 802.11be+ implementations) may support the following trigger frame transmission rule in MLO: When at least one PPDU from other STAs belonging to a non-STR non-AP MLD is scheduled for transmission after the PPDU containing the trigger frame before (aSIFSTime+aSignalExtention-aRxTxTurnaroundTime) has expired, the AP in the AP MLD shall not transmit a trigger frame with the required CS subfield of the trigger frame set to 1 to the STA in the same non-STR non-AP MLD. In some implementations, it should be noted that in the above, aRxTxTurnaroundTime is 4μs. In some implementations, it should also be noted that the end time of the first PPDU (which carries the frame requesting an immediate response frame) cannot be more than aRxTxTurnaroundTime earlier than the end time of the second PPDU containing the trigger frame (whose required CS subfield is set to 1). In some implementations, it should be further noted that the AP STA still follows the required CS rule defined in 802.11ax. In some embodiments, aSIFSTime refers to the nominal time (in microseconds) required for the MAC and physical (PHY) layers to respond from the end of the received PPDU and with the beginning of the PPDU containing the earliest possible response frame; aSignalExtention is the duration (in microseconds) of the signal extension (i.e., the period of null bit transmission) included immediately after certain PPDU formats; and aRxTxTurnaroundTime is the maximum time (in microseconds) required for the PHY to change from reception to transmission.

[0100] Some implementations (e.g., 802.11be / 802.11be+ implementations) may support the following trigger frame sending rules in MLO: When the AP MLD simultaneously triggers TB PPDUs from more than one STA belonging to the same non-STR non-AP MLD and the frames in the TB PPDUs are allowed to request control response frames from the AP MLD, the UL length subfield value in the request trigger frame should be set to the same value.

[0101] Some implementations (e.g., 802.11be implementations) may support the use of a padding procedure (e.g., of 802.11ax) when sending a trigger frame, such as to extend the frame length to meet the end time requirement of the PPDU carrying the trigger frame in MLO.

[0102] Some implementations relate to spatial multiplexing. In some implementations (e.g., 802.11ax implementations), a subfield of a trigger frame (e.g., a UL spatial multiplexing (SR) subfield of a common information field) includes one or more values ​​to be included in a spatial multiplexing field in a HE-SIG-A field of a requested HE TB PPDU.

[0103] Figure 6 is a diagram illustrating an example format of a UL spatial multiplexing subfield 600. In the example UL spatial multiplexing subfield 600, each spatial multiplexing n subfield (1≤n≤4) is set to the same value as its corresponding subfield in the HE-SIG-A field of the HE TB PPDU. In some implementations, the UL spatial multiplexing trigger frame (e.g., for use in 802.11be) includes two EHT spatial multiplexing subfields, with 4 bits in each subfield. In the UL spatial multiplexing subfield 600, an example length of each spatial multiplexing subfield is indicated in bits below each field in the figure, and example start and end bit positions of each subfield are shown above each field.

[0104] Some implementations involve transmitting the response during a parameterized spatial multiplexing transmission (PSRT) transmit opportunity (TXOP).

[0105] Figure 7 702, STA 704 in the BSS of AP 702, and STA OBSS-A 706 (STA from overlapping basic service set (OBSS) (OBSS-A)) and STA OBSS-B708 is a diagram of an example parameterized spatial multiplexing (PSR) process 700 (e.g., as defined in 802.11ax) between STAs from different OBSSs (OBSS-B). In some implementations, the PSR parameters include, for example, a PSR value carried in a transmitted field (such as a spatial multiplexing subfield in a common information field or a special user information field), a UL target received power in a user information field in a trigger frame, and / or other parameters.

[0106] In this example, AP 702 sends a parameterized spatial multiplexing receive (PSRR) PHY layer protocol data unit (PPDU) 710 that carries a trigger frame requesting a HE TB PPDU 714. PSRR PPDU 710 includes or indicates overlapping basic service set (OBSS) STAs such as STA OBSS-A The PSRR PPDU 710 may be configured to select a transmit power for the PSRT PPDU 712 by using a PSR value of 706 so that concurrent or simultaneous transmission (e.g., a high efficiency (HE) triggered (TB) PPDU 714 and a PSRT PPDU 712 in the figure) is possible. In other words, the HE TB PPDU 714 is not significantly interfered with by the transmission of the PSRT PPDU 712. The PSRR PPDU 710 may also indicate the duration of the HETB PPDU 714 (e.g., in the UL length subfield in the common information field of the trigger frame). For example, this information may be used by an OBSS STA (e.g., such as a STA OBSS-A 706 and / or STA OBSS-B 708) to determine the duration of the TB PPDU. This duration is indicated as duration 799. However, in some implementations, the PSRT PPDU 712 may request an immediate ACK or any response PPDU. In some implementations, the STA OBSS-B 708 may not be able to send a response frame (e.g., Block Ack 716) due to, for example, a power detection (PD) or PSR condition, so the STA OBSS-A 706 It can be determined that the PSRT PPDU is not received by the STA OBSS-B 708 successfully received. In some implementations, STA OBSS-A706 resets its clear channel estimate (CCA) using the PHY-CCARESET.request primitive as shown. It is noted that while process 700 illustrates a single HE TB PPDU 714 from a single STA 704 in the BSS of AP 702, in some implementations, more than one STA in the BSS of AP 702 may send a HE TB PPDU in response to the PSRR PPDU 710. It is also noted that while the HE TB PPDU is used as an example, any suitable TB PPDU (e.g., EHT TB PPDU or EHT+TB PPDU) may be used. Some implementations involve enhanced spatial multiplexing using punctured subchannels. In some implementations, 802.11be uses punctured subchannels to facilitate additional transmissions. In order to achieve more efficient spectrum usage, in some implementations, punctured subchannels may be used by OBSS STAs. Detailed procedures for implementing spatial multiplexing of punctured subchannels may be required.

[0107] Some implementations involve enhanced spatial multiplexing where multiple generations of Wi-Fi devices coexist. In spatial multiplexing operations, in some implementations, the transmitted PSRT PPDU may request different types of response PPDUs; for example, HE TB PPDUs, EHT TB PPDUs, or both, for example, depending on the settings of the PSRT PPDU (e.g., the values ​​of fields and / or subfields in the frame carried by the PSRT PPDU). In some implementations, a mechanism may be needed to communicate the frame format of the PSRT PPDU and / or the frame format of the response PPDU to the OBSS STA; for example, so that the OBSS STA can obtain spatial multiplexing information from the correct field.

[0108] Some implementations involve enhancements to the HE spatial multiplexing subfield of the trigger frame and / or the EHT spatial multiplexing subfield of the trigger frame. In some implementations of HE spatial multiplexing, the manner of determining the PSR value set in the UL spatial multiplexing subfield of the common information field of the trigger frame is not defined. In some implementations of EHT spatial multiplexing, the manner of determining the PSR value set in the EHT spatial multiplexing subfield of the special user information field of the trigger frame is not defined. Therefore, when the PPDU is greater than 80 MHz, it may be necessary to define a manner in which the PSR value per 20 MHz subchannel may be set in the UL spatial multiplexing field of the HE variant common field of the trigger frame. In some implementations, it may be necessary to define a manner in which the PSR value per 20 MHz subchannel may be set in the EHT spatial multiplexing subfield of the trigger frame.

[0109] Some implementations involve the sending of responses to PSRT TXOPs. Some such implementations may address the issue of sending responses in PSRT TXOPs, for example, Figure 7 For example, in some implementations, existing PSR operations may be enhanced. In some such implementations, transmissions to and from an AP (which may send a PSRR PPDU) may be considered primary transmissions. Transmissions between OBSS STAs (e.g., including a PSRT PPDU and corresponding response transmissions) may be considered secondary transmissions.

[0110] Some implementations involve power controlled response transmissions. For example, in some implementations, the transmit power of a frame responsive to a PSRT PPDU may be limited or controlled so that interference with an existing or primary transmission concurrent with the frame responsive to the PSRT PPDU may be limited, mitigated, or avoided.

[0111] Figure 8 802, STA 804 in the BSS of AP 802, and STA OBSS-A 806 (STA from OBSS (OBSS-A)) and STA OBSS-B 808 is a diagram of an example enhanced PSR process 800 between STAs from different OBSSs (OBSS-B).

[0112] In this example, AP 802 (e.g., in BSS1) may send a PSRR PPDU 810 that carries a trigger frame requesting a TB PPDU 814. AP 802 may set one or more fields (e.g., a spatial multiplexing field in the UL spatial multiplexing subfield in the common information field of the trigger frame and / or a spatial multiplexing subfield in the special user information field of the trigger frame), for example, to enable a PSRT TXOP in the OBSS. PSRR PPDU 810 also indicates the duration of the TB PPDU 814 (e.g., in the UL length subfield in the common information field of the trigger frame). This information may be used, for example, by an OBSS STA (e.g., such as a STA OBSS-A 806 and / or STA OBSS-B 808) to determine the duration of the TB PPDU. This duration is indicated as duration 899. The OBSS STA (STA in the example enhanced PSR process 800) OBSS-A 806) may identify a PSR opportunity based on a trigger frame of the PSRR PPDU 810 and / or a physical layer convergence procedure (PLCP) header of the TB PPDU, and may start a PSR-based backoff process. In some implementations, the STA OBSS-A806 uses the PHY-CCARESET.request primitive as shown to reset its clear channel estimate (CCA). OBSS-A After STA 806 acquires the medium (e.g., after its backoff counter reaches zero), it may send a PSRT PPDU 812. PSRT PPDU 812 may include power control information for subsequent response frames (e.g., acknowledgment frames). In some implementations, the power control information may indicate to the STA OBSS_A The minimum receive power level required to successfully receive the response frame. The receiving STA of the PSRT PPDU 812 (the STA in the example enhanced PSR process 800) OBSS_B 808) may calculate its transmit power for responding to the PPDU (BlockAck 816 in this example) based on the power control information. In some implementations, the transmit power may be sufficient (e.g., just sufficient) for the STA OBSS_A 806 successfully decodes the response frame. In some specific implementations, advantageously, from STA OBSS_B The transmission of STA may not introduce significant interference to the main transmission. OBSS_B The MCS level may also be selected based on the transmit power limit. OBSS_B Based on the STA OBSS_A The MCS level is selected by signaling.

[0113] In some implementations, the power control information carried in the PSRT PPDU (e.g., PSRR PPDU 810) may include one or more of the following: the transmit power of the PSRT PPDU and the STA OBSS_A The expected received power or received signal strength indicator (RSSI); the transmit power of the PSRT PPDU and the STA OBSS_A the sum of the expected RSSIs; the PSR value currently used in the trigger frame and PPDU; and / or the power control information can be one or more values ​​per the entire bandwidth, per 20MHz subchannel, per 40MHz subchannel, per 80MHz subchannel, per 160MHz subchannel, or a mixed mode, where one or more bits of the field and / or subfield may indicate the subchannel resolution (for example, whether it is power control information per 80MHz or power control information per 320MHz, etc.) or the unit of the power control information, and the remaining bits may indicate a detailed value in the resolution or unit.

[0114] In some implementations, the power control information may be indicated by or carried in PHY layer signaling and / or MAC layer signaling. In some implementations, for example, where the power control information is indicated by or carried in PHY layer signaling, the power control information may be indicated by or carried in the PLCP header, such as in the U-SIG and / or EHT SIG field and / or the SERVICE field in the data field. In some implementations, a bit in the U-SIG and / or EHT SIG field may be used to indicate that this is a PSRT PPDU. In some implementations, if this bit is set, the spatial multiplexing subfield (e.g., in the EHT-SIG in the EHT MU PPDU or EHT TB PPDU) may be reused to carry power control information for the response frame.

[0115] In some implementations, for example, where the power control information is indicated or carried by MAC layer signaling, the power control information may be indicated or carried by a MAC header. In some implementations, the command and status (CAS) control subfield in the A control field of the HE variant HT control field in the MAC frame may be modified to indicate or carry the power control information.

[0116] Fig. 9 is a diagram illustrating an example modified CAS control subfield format. In some implementations, a field (e.g., which may be referred to as a response power control information field) may be included in a CAS control subfield element. In some implementations, the field (i.e., a field that may be referred to as a response power control information field) may be 4 bits long and may use the same encoding as the TB PPDU spatial multiplexing field in some implementations. In some implementations, a control subfield may be defined in the A control field of the HE variant HT control field. In some implementations, a control subfield that may be defined in the A control field of the HE variant HT control field may indicate or carry the power control information discussed herein.

[0117] In some implementations, the PSRT PPDU may carry a message for OBSS-B The MCS level signaled may correspond to the transmit power required by the STA in response to the PPDU or the MCS assignment information sent by the STA in response to the PPDU. OBSS-AThe expected Rx power for successful decoding at. The MCS level information may be carried in the trigger response scheduling (TRS) control subfield in the A control subfield in the HT control field of the HE variant. The MCS level information may also be carried directly in the PHY signaling field (e.g., U-SIG or EHT-SIG field). Alternatively, in some specific implementations, the PSRT PPDU may carry an A-MPDU in which an MPDU may carry a trigger frame. MCS assignment, power control information, and RU allocation may be included in the trigger frame. It should be noted that this method may be combined and applied to all methods mentioned herein.

[0118] Some implementations involve synchronous endpoint sending.

[0119] For example, Fig.10 is a diagram illustrating an example enhanced PSR process 1000 that includes a synchronization end point and includes an AP 1002, a STA 1004 in a BSS of the AP 1002, and a STA OBSS-A 1006 (STA from OBSS (OBSS-A)) and STA OBSS-B 1008 occurs between STAs from different OBSSs (OBSS-B).

[0120] In this example, the AP 1002 (e.g., in BSS1) may send a PSRR PPDU 1010 that carries a trigger frame requesting a TB PPDU 1014. The AP 1002 may set one or more fields (e.g., a spatial multiplexing field in the UL spatial multiplexing subfield in the common information field of the trigger frame and / or a spatial multiplexing subfield in the special user information field of the trigger frame), for example, to enable the PSRT TXOP in the OBSS. The PSRR PPDU 1010 also indicates the duration of the TB PPDU 1014 (e.g., in the UL length subfield in the common information field of the trigger frame. This information may be used, for example, by an OBSS STA (e.g., such as a STA OBSS-A 1006 and / or STA OBSS-B 1008) determines the duration of the TB PPDU. This duration is indicated as duration 1099. The OBSS STA (STA in the example enhanced PSR process 1000) OBSS-A 1006) may identify a PSR opportunity based on the trigger frame of the PSRR PPDU 1010 and may start a PSR-based backoff process. In some implementations, the STA OBSS-A 706 uses the PHY-CCARESET.request primitive as shown to reset its clear channel estimate (CCA). OBSS-AAfter 1006 acquires the medium (e.g., after its backoff counter reaches zero), it may send a PSRT PPDU 1012. The PSRT PPDU 1012 may include padding 1013. Note that while process 1000 illustrates a single TB PPDU 1014 from a single STA 1004 in the BSS of AP 1002, in some implementations, more than one STA in the BSS of AP 1002 may send TB PPDUs in response to the PSRR PPDU 1010. Note also that while a TB PPDU is used as an example, any suitable TB PPDU may be used (e.g., an EHT TB PPDU or an EHT+TB PPDU).

[0121] In some implementations, the size of the padding 1013 may be such that the end of the PSRT PPDU 1012 is aligned with the end of the TB PPDU 1014 (e.g., Fig.10 1016) can be aligned with the acknowledgement frame (e.g., ACK / BA 1018 in this example) of the primary transmission (e.g., TB PPDU 1014 in this example). In some implementations, it is advantageous that such padding prevents BlockAck 1016 from overlapping with TB PPDU 1014.

[0122] In some implementations, if STA1 1004 is sending a TB PPDU 1014, OBSS_B 1008 is able to successfully decode the PSRT PPDU 1012, then the STA OBSS_B 1008 and STA1 1004 may be hidden relative to each other (ie, unable to interfere, e.g., as hidden nodes), or STA OBSS_B 1008 and STA1 1004 may be negligible). In this case, in some implementations, the interference from STA OBSS_B The transmission of the response frame (eg, BlockAck 1016 in this example) of 1008 may not affect the reception of ACK / BA 1018 by STA1 1004 .

[0123] In some implementations, transmission of the PSRT PPDU 1012 may be terminated at the end of the TB PPDU 1014 triggered by the trigger frame carried in the PSRR PPDU 1010 if the PSRT PPDU 1012 cannot be completed before the end of the TB PPDU 1014 triggered by the trigger frame carried in the PSRR PPDU 1010. The PSRT PPDU 1010 may be padded to align with the end point of the PPDU duration of the TB PPDU triggered by the trigger frame carried in the PSRR PPDU.

[0124] In some implementations, padding 1013 may be or include any suitable padding field (e.g., an added field in a trigger frame, post-end-of-frame (EOF) A-MPDU padding, other MPDUs in an aggregated A-MPDU, or packet extensions). In some implementations, PSRT PPDU 1012 may indicate or carry power control information for a response transmission (e.g., block ACK 1016 in this example), as discussed herein.

[0125] Some implementations may include an indication (e.g., which may be referred to as a same RU allocation indication) that may indicate that the same RU allocation used for the TB PPDU may be used for a later ACK / BA transmission from the AP. For example, in some such implementations, a STA (e.g., STA1 1004) may be allocated to transmit a TB PPDU (e.g., TB PPDU 1014) on RU / MRU k, and if the same RU allocation indication is set accordingly, the STA may expect an ACK / BA transmission (e.g., ACK / BA 1018) from the AP (e.g., AP1 1002) to also be on RU / MRU k. In some implementations, the same RU allocation indication (e.g., such as a U-SIG or EHT-SIG in an EHT PPDU) may be indicated or carried in PHY layer signaling. In some implementations, the same RU allocation indication may be carried in MAC layer signaling such as a trigger frame. Alternatively or additionally, in some implementations, the primary transmitting AP may use the same RU / MRU to send a response frame (e.g., Ack / BA) to the TB PPDU, and if ESR is allowed, the same RU / MRU may be allocated to the STA for TB PPDU transmission. In some implementations, this setting may be used to limit or mitigate the response transmission (e.g., from the STA) of the PSRT PPDU (e.g., PSRT PPDU 1012). OBSS-B 1008's BlockAck1016) potential interference.

[0126] In some implementations, the receiving STA (e.g., STA OBSS-B 1008) may send a response frame (e.g., BlockAck 1016) at a time (e.g., xIFS time) after the end of the PSRT PPDU (e.g., PSRT PPDU 1012). xIFS is a predefined interframe space. xIFS may be any interframe space defined in 802.11, such as a short interframe space (SIFS), a distributed coordination function (DCF) interframe space (DIFS), a point coordination function (PCF) interframe space (PIFS), etc.

[0127] Some implementations include delaying the sending of acknowledgments. For example, in some implementations, a STA in an OBSS that identifies a PSR opportunity OBSS-A (For example, Figure 7 ) may request delayed ACKs so that the TB PPDU transmitted in response to the PSRR PPDU is received within the transmission time of the TB PPDU transmitted in response to the PSRR PPDU. OBSS-B An Ack is not transmitted as a response to a PSRT PPDU.

[0128] Fig.11 1 is a diagram illustrating an example enhanced PSR process 1100 with delayed response. The process 1100 includes an AP 1102, a STA 1104 in a BSS of the AP 1102, and a STA OBSS-A 1106 (STA from OBSS (OBSS-A)) and STA OBSS-B 1108 occurs between STAs from different OBSSs (OBSS-B).

[0129] In this example, AP 1102 (e.g., in BSS1) may send a PSRR PPDU 1110 that carries a trigger frame requesting a TB PPDU 1114. AP 1102 may set one or more fields (e.g., a spatial multiplexing field in the UL spatial multiplexing subfield in the common information field of the trigger frame and / or a spatial multiplexing subfield in the special user information field of the trigger frame), for example, to enable a PSRT TXOP in the OBSS. PSRR PPDU 1110 also indicates the duration of the TB PPDU 1114 (e.g., in the UL length subfield in the common information field of the trigger frame). This information may be used, for example, by an OBSS STA (e.g., such as a STA OBSS-A 1106 and / or STA OBSS-B 1108) determines the duration of the TB PPDU. This duration is indicated as duration 1199. The OBSS STA (STA in the example enhanced PSR process 1100) OBSS-A 1106) may identify a PSR opportunity based on the trigger frame of the PSRR PPDU 1110 and may start a PSR-based backoff process. In some implementations, the STA OBSS-A 706 uses the PHY-CCARESET.request primitive as shown to reset its clear channel estimate (CCA). OBSS-AAfter 1106 acquires the medium (e.g., after its backoff counter reaches zero), it may send a PSRT PPDU 1112. The PSRT PPDU 1112 may include an indication of the ACK policy. It is noted that while process 1100 illustrates a single TB PPDU 1114 from a single STA 1104 in the BSS of AP 1102, in some implementations, more than one STA in the BSS of AP 1102 may send a TB PPDU in response to the PSRR PPDU 1110. It is also noted that while a TB PPDU is used as an example, any suitable TB PPDU may be used (e.g., an EHT TB PPDU or an EHT+TB PPDU).

[0130] In some implementations, the indication of the ACK policy may be indicated by or included in a subfield (e.g., which may be referred to as an ACK policy indicator subfield, e.g., in a QoS control field). OBSS-A 1106 is set to a value that does not request an immediate response, so that STA OBSS-B 1108 takes no action upon receiving the PSRT PPDU 1112 except recording the decoding status in the log table. OBSS-A 1106 may transmit an acknowledgement request (e.g., block acknowledgement (BA) request (BAR) 1120) to trigger a delayed acknowledgement (e.g., delayed block acknowledgement (BA) 1122) of the PSRT PPDU 1112. Note that the indication may instead be set to a value (e.g., BA 1116) that requests an immediate or typical acknowledgement, for example, under appropriate conditions or circumstances.

[0131] In some implementations, for example, in location-aware communications, a STA OBSS-A 1106 Based on STA OBSS-B 1108 sets the ACK policy indicator to delayed ACK based on information about the location of AP 1102. In some implementations, if the STA OBSS-B 1108 and AP 1102 is less than the threshold distance, and / or if the STA OBSS-A If the path loss (PL) between 1106 and AP1102 is less than the given minimum PL, then STA OBSS-A 1106 The ACK policy may be set to Delayed Ack.

[0132] In some implementations, location-aware communications (such as those described above) may be enabled by location information (e.g., location information acquired by any suitable means). For example, in some implementations, the location information may be acquired by GPS. In some implementations, the location information may be acquired in a ranging session supported by the HE ranging feature. In some implementations, the location information may be acquired by advanced PL calculations, which may be updated dynamically or statically based on the mobility capabilities of the STAs within the BSS or the OBSS, for example.

[0133] In some implementations, STA OBSS-A 1106 may determine the time (t PSRT ), and based on the time required for STA 1104 to transmit TB PPDU 1214 (t TB ) OBSS-A 1106 can determine the time difference Δt=t TB -t PSRT Large enough so that STA OBSS-B 1108 transmits an Ack, and this Ack may not interfere with the TB PPDU (i.e., STA 1106 has determined that the BA from 1108 will not interfere with the existing transmission). In this case, STA OBSS-A 1106 may request an immediate response. Otherwise, STA OBSS-A 1106 can be sent to STA OBSS-B 1108 Request (eg, BAR 1120 ) to delay acknowledgment (eg, delay BA 1122 ).

[0134] Some embodiments may include conditionally delaying response sending.

[0135] Fig.12 1 is a diagram illustrating an example enhanced PSR process 1200 including conditional delayed response transmission. The process 1200 includes an AP 1202, a STA 1204 in a BSS of the AP 1202, and a STA 1204 in a BSS of the AP 1202. OBSS-A 1206 (STA from OBSS (OBSS-A)) and STA OBSS-B 1208 occurs between STAs from different OBSSs (OBSS-B).

[0136] In process 1200, AP 1202 may send a PSRR PPDU 1210 to one or more associated STAs, including STA 1204. AP 1202 may set one or more fields (e.g., a spatial multiplexing field in the UL spatial multiplexing subfield in the common information field of a trigger frame and / or a spatial multiplexing subfield in the special user information field of a trigger frame), for example, to enable a PSRT TXOP in an OBSS. PSRR PPDU 1210 also indicates the duration of a TB PPDU 1214 (e.g., in the UL length subfield in the common information field of the trigger frame). This information may be used, for example, for OBSS STAs (e.g., such as STAs). OBSS-A 1206 and / or STA OBSS-B The OBSS STA may monitor 1211 the PSRR PPDU 1210 and determine whether there is a PSR opportunity, for example, by checking the PSR value and the UL target received power subfield in the trigger frame carried by the PSRR PPDU. In some implementations, the STA OBSS-A 1206 uses the PHY-CCARESET.request primitive as shown to reset its clear channel estimate (CCA). In this example, STA OBSS-A 1206 identifies a PSR opportunity. OBSS-A After the backoff counter of 1206 reaches 0, STA OBSS-A 1206 may send a PSRT PPDU 1212. The PSRT PPDU 1212 may include an indication requesting a conditional response or confirmation (e.g., in a special BA policy or other indication). After receiving the PSRT PPDU 1212, if the STA OBSS-B 1208 (which may be the intended receiver of the PSRT PPDU 1212) determines a PSR opportunity during monitoring 1211 and has sufficient time to send a response / acknowledgement frame BA 1216 before the end of the concurrent TB PPDU 1214 in the primary transmission, then the STA OBSS-B 1208 may send a BA 1216, for example, at a time xIFS after the end of the PSRR PPDU 1210. Otherwise, the STA OBSS-B 1208 may suspend the transmission of the delayed response / acknowledgement delay BA 1222 until it can acquire the channel later, or until it receives a confirmation from the STA. OBSS-A1206 until a request BAR 1220 (e.g., a polling frame or a trigger frame) is received. Note that while process 1200 illustrates a single TB PPDU 1214 from a single STA 1204 in the BSS of AP 1202, in some implementations, more than one STA in the BSS of AP 1202 may send a TB PPDU in response to the PSRR PPDU 1210. Note also that while a TB PPDU is used as an example, any suitable TB PPDU (e.g., an EHT TB PPDU or an EHT+TB PPDU) may be used.

[0137] In some implementations, an indication (e.g., a subfield, such as an Ack Policy Indicator subfield) in a QoS frame may be set to a value indicating a conditional ACK. In some implementations, an indication (e.g., a bit) in a CAS Control subfield in a HT Control field may indicate a conditional ACK. In some implementations, if the indication is set, the receiving STA may determine whether it can send an immediate ACK based on one or more conditions, such as whether the STA receives a PSRR PPDU and whether the STA detects a PSR opportunity.

[0138] Some implementations include power control for multiple response frames following a PSRT PPDU. For example, in some implementations, multiple response frames are transmitted from multiple OBSS STAs following transmission of a PSRT PPDU for a duration indicated in the PSRR PPDU. Fig.13 , Fig.14 and Fig.15 Examples are shown and described. In these examples, the PSRR PPDU occupies subchannel 1 and subchannel 2. In some implementations, the PSR requirement is applied to subchannel 1 and subchannel 2. In other words, the subchannels used by the PSRR PPDU are subchannel 1 and subchannel 2. The PSR requirement is only applied to the subchannel on which the PSRR PPDU is sent.

[0139] Fig.13 An example enhanced PSR process 1300 is illustrated in which one PSRT PPDU 1310 (e.g., carrying one trigger frame) is followed by multiple A-MPDUs 1350 from multiple OBSS STAs. In process 1300, within a duration 1360 indicated in a PSRR PPDU 1310 transmitted from an AP 1302 (e.g., via a common information field of a trigger frame carried by the PSRR PPDU 1310), the A-MPDUs 1350 from the OBSS STAs are transmitted. OBSS-A 1306 transmits PSRT PPDU 1310, and from multiple STAs OBSS-B (STA OBSS-B11308、STA OBSS-B2 1309, ……, STA OBSS-Bn 1311) transmits a plurality of A-MPDUs 1350. The AP 1302 may set one or more fields (e.g., the spatial multiplexing field in the UL spatial multiplexing subfield in the common information field of the trigger frame and / or the spatial multiplexing subfield in the special user information field of the trigger frame), for example, to enable the PSRT TXOP in the OBSS. The PSRR PPDU 1310 also indicates the duration of the TB PPDU 1314 (e.g., in the UL length subfield in the common information field of the trigger frame. For example, this information may be used by the OBSS STAs (e.g., such as OBSS-A 1206 and / or STA OBSS-B1 1308) to determine the duration of the TB PPDU. The duration is indicated as duration 1360. It is noted that while process 1300 illustrates a single HE TB PPDU 1314 from a single STA 1304 in the BSS of AP 1302, in some implementations, more than one STA in the BSS of AP 1302 may send an HE TB PPDU in response to the PSRR PPDU 1310. It is also noted that while an HE TB PPDU is used as an example, any suitable TB PPDU (e.g., an EHT TB PPDU or an EHT+TB PPDU) may be used.

[0140] To comply with the PSR power constraints, such as indicated by the PSRR PPDU 1310, the STA OBSS-A 1306 may reduce the power indication in the PSRTPPDU 1312 (eg, addressed to STAs assigned to subchannel 1 and / or subchannel 2). OBSS-B In this example, the corresponding STA OBSS-B It is STA OBSS-B1 1308 and STA OBSS-B2 1309. In some implementations, alternatively, if STA OBSS-A 1306 is an EHT or EHT-advanced device, then STA OBSS-A 1306 may indicate, for example, in the special user information field of the PSRT PPDU 1312, the OBSS-B (STA OBSS-B1 1308、STA OBSS-B2 1309, ……, STA OBSS-Bn 1311) to reduce the transmission power. In some specific implementations, alternatively, STA OBSS-A1306 does not assign any UL transmission on subchannel 1 and subchannel 2. In some implementations, if the STA OBSS-A If the multi-STA block ACK 1330 transmitted at 1306 is transmitted within the duration 1360 set by the PSRR PPDU, the multi-STA block ACK complies with the PSR constraints on subchannel 1 and subchannel 2.

[0141] Fig.14 An example enhanced PSR process 1400 is illustrated in which one PSRT PPDU 1410 (e.g., carrying a trigger frame) is followed by multiple block acknowledgments 1470. In process 1400, multiple A-MPDUs with MU-BAR trigger frames 1450 are sent from STAs on subchannel 1, subchannel_2, ..., subchannel_n, respectively. OBSS-A 1406 transmitted to STA OBSS-BN Within a duration 1460 indicated in a PSRR PPDU 1410 transmitted from the AP 1402 (eg, via a common information field of a trigger frame carried by the PSRR PPDU 1410), multiple STAs OBSS-B (STA OBSS-B1 1408、STA OBSS-B2 1409, ……, STA OBSS-Bn The AP 1402 may transmit a plurality of block ACKs 1470 in accordance with the embodiment of the present invention. The AP 1402 may set one or more fields (e.g., the spatial multiplexing field in the UL spatial multiplexing subfield in the common information field of the trigger frame and / or the spatial multiplexing subfield in the special user information field of the trigger frame), for example, to enable the PSRT TXOP in the OBSS. The PSRR PPDU 1410 may also indicate the duration of the TB PPDU 1414 (e.g., in the UL length subfield in the common information field of the trigger frame). For example, this information may be used by the OBSS STAs (e.g., such as OBSS-A 1406 and / or STA OBSS-B1 1408) to determine the duration of the TB PPDU. The duration is indicated as duration 1460. Note that while process 1400 illustrates a single HE TB PPDU 1414 from a single STA 1404 in the BSS of AP 1402, in some implementations, more than one STA in the BSS of AP 1402 may send an HE TB PPDU in response to the PSRR PPDU 1410. Note also that while an HE TB PPDU is used as an example, any suitable TB PPDU (e.g., an EHT TB PPDU or an EHT+TB PPDU) may be used. In some implementations, STA 1404 may receive a HE TB PPDU 1414 from a single STA 1404 in the BSS of AP 1402. OBSS-A806 resets its clear channel estimate (CCA) using the PHY-CCARESET.request primitive as shown.

[0142] To comply with the PSR power constraints, such as indicated by the PSRR PPDU 1410, the STA OBSS-A 1406 may set a reduced tx power indication (eg, addressed to STAs assigned to subchannel 1 and / or subchannel 2). OBSS-B In this example, the corresponding STA OBSS-B It is STA OBSS-B1 1308 and STA OBSS-B2 1309. In some implementations, alternatively, for example, if STA OBSS-A 1406 is an EHT or EHT-advanced device, then STA OBSS-A 1406 may indicate, for example, in a special user information field (e.g., a special user information field in a corresponding MU-BAR trigger frame 1450 transmitted on subchannel 1 and / or subchannel 2, respectively) the request from the STA. OBSS-B (STA OBSS-B1 1408、STA OBSS-B2 1409, ……, STA OBSS-Bn 1411) to reduce the transmission power. In some specific implementations, alternatively, STA OBSS-A 1406 does not assign any UL transmission on subchannel 1 and subchannel 2. In some implementations, delayed block acknowledgement is applied to subchannel 1 and subchannel 2, alternatively.

[0143] Fig.15 An example enhanced PSR process 1500 is illustrated in which a PSRT PPDU 1510 is followed by a MU-BAR trigger frame 1580 and a plurality of block acknowledgments 1570. In process 1500, within a duration 1560 indicated in a PSRR PPDU 1510 transmitted from an AP 1502 (e.g., via a common information field of a trigger frame carried by the PSRR PPDU 1510), a STA OBSS-A 1406 transmits multiple A-MPDUs 1550 followed by a single MU-BAR trigger frame 1580, and from multiple STAs OBSS-B (STA OBSS-B1 1508、STA OBSS-B2 1509, ..., STA OBSS-BnThe AP 1502 may transmit a plurality of block ACKs 1570 in accordance with the embodiment of the present invention. The AP 1502 may set one or more fields (e.g., the spatial multiplexing field in the UL spatial multiplexing subfield in the common information field of the trigger frame and / or the spatial multiplexing subfield in the special user information field of the trigger frame), for example, to enable the PSRT TXOP in the OBSS. The PSRR PPDU 1510 may also indicate the duration of the TB PPDU 1514 (e.g., in the UL length subfield in the common information field of the trigger frame). For example, this information may be used by the OBSS STAs (e.g., such as OBSS-A 1506 and / or STA OBSS-B1 1508) to determine the duration of the TB PPDU. The duration is indicated as duration 1560. Note that while process 1500 illustrates a single HE TB PPDU 1514 from a single STA 1504 in the BSS of AP 1502, in some implementations, more than one STA in the BSS of AP 1502 may send a HE TB PPDU in response to the PSRR PPDU 1510. Note also that while a HE TB PPDU is used as an example, any suitable TB PPDU (e.g., an EHT TB PPDU or an EHT+TB PPDU) may be used. In some implementations, STA 1504 may receive a HE TB PPDU 1514 from a single STA 1504 in the BSS of AP 1502. OBSS-A 806 resets its clear channel estimate (CCA) using the PHY-CCARESET.request primitive as shown.

[0144] To comply with the PSR power constraints, such as indicated by the PSRR PPDU 1410, the STA OBSS-A 1506 may set a reduced power indication in the MU-BAR trigger frame 1580 (eg, addressed to STAs assigned to subchannel 1 and / or subchannel 2). OBSS-B In this example, the corresponding STA OBSS-B It is STA OBSS-B1 1508 and STA OBSS-B2 1509. In some implementations, alternatively, for example, if STA OBSS-A 1506 is an EHT or EHT-advanced device, then STA OBSS-A 1506 may indicate in a special user information field (e.g., a special user information field in the MU-BAR trigger frame 1580) the request from the STA. OBSS-B (STA OBSS-B1 1508、STA OBSS-B2 1509, ..., STA OBSS-Bn1511) to reduce the transmission power. In some specific implementations, alternatively, STA OBSS-A 1506 does not assign any UL transmission on subchannel 1 and subchannel 2. In some implementations, delayed block ACK is applied to subchannel 1 and subchannel 2, alternatively.

[0145] Some implementations involve enhanced spatial reuse using punctured subchannels. In some implementations, enhanced spatial reuse (ESR) operation allows subchannels punctured in one BSS to be reused by another OBSS. As described below, the terms "enhanced spatial reuse opportunity," "enhanced spatial reuse receive (ESRR) PPDU," and "enhanced spatial reuse transmit (ESRT) PPDU" are used herein.

[0146] The term "enhanced spatial multiplexing opportunity" may refer to a spatial multiplexing opportunity established based on the puncturing subchannel information in the PHY layer signaling of a PPDU or MAC frame requesting a response transmission or a TB PPDU. The term "ESRR PPDU" may refer to a PPDU containing an indication that ESR transmission is allowed. In one approach, an ESRR PPDU may carry the puncturing subchannel information. The term "ESRT PPDU" may refer to a PPDU transmitted during an ESR opportunity.

[0147] In some implementations, a STA supporting ESR-based ESRT PPDU transmission may indicate this by setting the ESR-based SR Support subfield in the PHY (or MAC) Capability Information field in an existing or newly defined Capability element it transmits (e.g., to 1). In some implementations, a STA supporting ESR-based ESRT PPDU reception may indicate this by setting the ESR Responder subfield in the MAC (or PHY) Capability Information field in an existing or newly defined Capability element it transmits (e.g., to 1). In some implementations, alternatively or additionally, a STA supporting ESR-based operation may set this in any capability field, subfield, or element it transmits.

[0148] In some implementations, one or more BSS-level signals (e.g., management frames between an AP and a STA to signal settings for a time period) may be used to indicate whether ESR operation is allowed or not. For example, an element (e.g., an enhanced spatial multiplexing parameter set element) may be defined and may be used (e.g., by setting a bit) to indicate whether ESR operation is allowed or not. In some implementations, one or more bits in an existing element (e.g., a spatial multiplexing parameter set element) may be used to indicate whether ESR operation is allowed or not. In some implementations, the AP may carry this BSS-level signaling in a management frame such as a beacon frame. In some implementations, a STA that receives this element from its associated AP (wherein the element has a specific value (e.g., a value of 1) in the ESR not allowed subfield) will not perform ESR-based SR transmission.

[0149] It should be noted that the term "enhanced spatial multiplexing" may refer to spatial multiplexing using punctured sub-channels.

[0150] Fig.16An example process 1600 for performing ESRT on punctured subchannels is illustrated. In process 1600, an AP (e.g., AP1 1602) may acquire a wireless medium and determine that ESR operation is allowed by sending an enhanced spatial multiplexing reception (ESRR) PPDU 1610. In some implementations, the ESRR PPDU 1610 may carry a trigger frame that may indicate that one or more subchannels may be punctured and that the trigger frame is for ESR operation (a new trigger type may be defined). In some implementations, the trigger frame may carry a field indicating the duration 1660 of the TB PPDU 1614 (e.g., the UL length field in the common information field). The duration 1660 of the TB PPDU 1614 may be considered to be the duration of the ESR operation. In some implementations, the ESRR PPDU 1610 may carry a MAC frame requesting a response frame. In some implementations, one or more subchannels may be punctured, and the ESRR PPDU 1610 and / or the MAC frame may include an indication of the punctured subchannels. In some implementations, the MAC frame may include a field (e.g., a duration field or an ESRR duration field) that may indicate the duration of the ESR operation. In some implementations, the duration of the ESR operation may indicate a time slot over which the OBSS STA may ignore the NAV setting on the primary 20 MHz channel and may transmit on one or more punctured subchannels. It is noted that while the process 1600 illustrates a single TB PPDU 1614 from a single STA 1604 in the BSS of the AP 1602, in some implementations, more than one STA in the BSS of the AP 1602 may transmit a TB PPDU in response to the PSRR PPDU 1610. It is also noted that while the TB PPDU is used as an example, any suitable TB PPDU may be used (e.g., an EHT TB PPDU or an EHT+TB PPDU).

[0151] In some implementations, the AP1 1602 may indicate ESR_ALLOW and / or ESR_DISALLOW (e.g., by multiplexing the spatial multiplexing field in the common information field and / or the special user information field in the trigger frame into a value indicating ESR_ALLOW and / or ESR_DISALLOW, for example, when the trigger type or other fields / subfields indicate that the trigger frame is for ESR operation). Here, ESR_ALLOW indicates that ESR operation is allowed during the requested TB PPDU transmission. ESR_DISALLOW indicates that ESR operation is not allowed during the requested TB PPDU transmission. It should be noted that in other implementations, these may be indicated by other fields or in other ways.

[0152] In process 1600, transmissions to and from AP1 1602 may be referred to as primary transmissions. In some implementations, an OBSS STA (e.g., AP2 1690) may receive an ESRR PPDU 1610 carrying a trigger frame or other type of frame that may include puncturing channel / subchannel information. Alternatively, in some implementations, the ESRR PPDU 1610 may include a field (e.g., a PHY signaling field) that may indicate puncturing channel / subchannel information. In some implementations, an OBSS STA (e.g., AP2 1690) may set the RXVECTOR parameter based on receipt of the ESRR PPDU 1610. For example, AP2 1690 may set the RXVECTOR parameter SPATIAL_REUSE to a value carried in the spatial multiplexing field in the common information field and / or the special user information field, and / or AP2 1690 may set the RXVECTOR parameter INACTIVE_SUBCHANNEL to indicate a punctured subchannel in the ESRR PPDU 1610 .

[0153] In some specific implementations, an OBSS STA (e.g., AP2 1690) may identify an ESR opportunity if one or more of the following conditions are met: the OBSS STA receives a PHY-RXSTART.indication corresponding to the reception of an ESRR PPDU (the ESRR PPDU is identified as an inter-BSS PPDU by checking that the RXVECTOR parameter BSS_COLOR is not 0 or is the same as the OBSS STA's own BSS color); the STA receives a PHY-RXSTART.indication corresponding to the reception of an ESRR PPDU identified as having one or more perforated subchannels; and / or the STA has an ESRT PPDU in the queue for transmission, and the destination STA is capable of receiving the ESRT PPDU.

[0154] In some implementations, an OBSS STA with an identified ESR opportunity may choose not to perform a NAV update operation based on the reception of an ESRR PPDU. In some implementations, a STA (e.g., AP2 1690) identifying an ESR opportunity may issue a PHY-CCARESET.request 1692 or a PHY-CCARESET.request in one or more puncturing subchannels to ignore a TB PPDU or multiple TB PPDUs (e.g., TB PPDU 1614) that are triggered by a trigger frame of an ESRR PPDU (e.g., ESRR PPDU 1610) and that occur within aSIFSTime+aRxPHYStartDelay+2×aSlotTime of the end of the last air symbol of the ESRR PPDU 1610 including the trigger frame, as long as the value of the RXVECTOR parameter BSS_COLOR of the TB PPDU matches the BSS color of the ESRR PPDU.

[0155] In some implementations, the OBSS STA (e.g., AP2 1690) may follow the ESR backoff process. For example, in some implementations, the OBSS STA (e.g., AP2 1690) may maintain a single backoff process across the entire bandwidth. If an ESR opportunity is identified, the OBSS STA (e.g., AP2 1690) may continue the countdown of the existing backoff process as long as the medium condition on the perforated subchannel is not otherwise indicated as "busy". In some implementations, the OBSS STA (e.g., AP2 1690) may obtain the medium when the backoff counter reaches zero. In some implementations, the OBSS STA (e.g., AP2 1690) may maintain the backoff process on each subchannel. In some implementations, if an ESR opportunity is identified, the OBSS STA (e.g., AP2 1690) may continue the countdown of the existing backoff process as long as the medium condition on the perforated subchannel is not otherwise indicated as "busy". In some implementations, the OBSS STA (e.g., AP2 1690) may acquire the medium when all backoff counters reach zero. In some implementations, the OBSS STA (e.g., AP2 1690) may transmit within aSIFSTime+aRxPHYStartDelay+2×aSlotTime (or aSIFSTime+aRxPHYStartDelay+2×aSlotTime) of the end of the last air symbol of the ESRR PPDU (e.g., ESRR PPDU 1610) including the trigger frame. In some implementations, the OBSS STA (e.g., AP2 1690) may attempt to synchronize its transmission with the TB PPDU (e.g., TB PPDU 1614).

[0156] In some implementations, an OBSS STA (e.g., AP2 1690) may send an ESRT PPDU 1694 to another OBSS STA (e.g., STA2 1696) on a punctured subchannel. In some implementations, the transmission of the ESRT PPDU 1694 may terminate before the end of the TB PPDU 1614. In some implementations, the transmission of the ESRT PPDU 1694 may be padded to the end of the TB PPDU (e.g., padding 1698). In some implementations, the ESRT PPDU 1694 may carry a MAC frame, where one or more bits of the MAC header may be used to indicate that the transmission is an ESRT PPDU 1694. For example, in the A control field, one bit may indicate whether the transmission is an ESRT PPDU 1694. In some implementations, alternatively or additionally, the ESRT PPDU indication may be carried in the PHY signaling or SERVICE field.

[0157] In some implementations, an OBSS STA (e.g., STA2 1696) that is the intended receiver of the ESRT PPDU 1694 may prepare a response transmission (e.g., BlockAck 1616). In some implementations, STA2 1696 may determine that the ESRT PPDU 1694 is an ESRT PPDU by checking the ESRT PPDU indication in the ESRT PPDU PHY signaling, MAC header, or SERVICE field. In some implementations, if any CCA, PSR, and PD requirements may not be met or STA2 1696 has a non-zero NAV setting, the STA may not send a response frame. In some implementations, the response frame may be sent on a subchannel or a subset of subchannels (e.g., a punctured subchannel) used by the ESRT PPDU 1694.

[0158] Some implementations include signaling-related modifications. For example, in some implementations, a field (e.g., a spatial multiplexing field) in an EHT MU PPDU and / or a future version of a PPDU and / or a trigger frame may indicate or be modified to indicate whether ESR is allowed or not allowed. In some implementations, a reserved value may be used to indicate whether ESR is allowed or not allowed. In some implementations, certain values ​​may be used to indicate a combination of ESR_DISALLOW or ESR_ALLOW with other spatial multiplexing schemes (such as PSR, PD, etc.). For example, Table 2 includes example possible values ​​associated with ESR operation.

[0159] Table 2

[0160] Example Spatial Multiplexing Field Coding for MU PPDU and / or TB PPDU and / or Trigger Frame

[0161] value meaning …… …… 1 ESR_DISALLOW 2 ESR_ALLOW 3 SR_RESTRICTED and ESR_ALLOW 4 SR_RESTRICTED and ESR_DISALLOW 5 SR_DELAYED and ESR_ALLOW 6 SR_DELAYED and ESR_DISALLOW …… …… 15 PSR_ESR_AND_NON_SRG_OBSS_PD_PROHIBITED

[0162] In some implementations, ESR_ALLOW and / or ESR_DISALLOW signaling may indicate whether the perforated subchannel may be multiplexed by the OBSS STA and may be carried in PHY signaling (e.g., Universal Signal (U-SIG) field and / or Very High Throughput Signal (EHT-SIG) field) or a trigger frame. In some implementations, if ESR_ALLOW is signaled, the OBSS STA may be allowed to ignore the NAV setting and transmit on one or more perforated subchannels, which may or may not be one or more of its primary subchannels.

[0163] In some implementations, the ESRT PPDU may be explicitly indicated in PHY signaling or MAC signaling. In some implementations, where the ESRT PPDU is explicitly indicated by PHY signaling, a bit in a PHY signaling field (e.g., a U-SIG and / or EHTSIG field) may be used to indicate whether the PPDU is an ESRT PPDU. In some implementations, for example, where the ESRT PPDU is explicitly indicated by MAC signaling, a bit in the MAC header may be used to indicate whether the PPDU carrying the MAC frame is an ESRT PPDU. In some implementations, the command and status (CAS) control subfield in the A control field of the HE variant HT control field in the MAC frame may be modified to carry the ESRT PPDU subfield.

[0164] Some implementations involve receiving STA behavior. For example, in some implementations, a receiving STA (e.g., STA_OBSS_B) of an ESRT PPDU may indicate that it has the ability to monitor and detect transmissions on non-primary channels. In some implementations, a receiving STA of an ESRT PPDU may indicate to the AP the ability to receive ESRT PPDUs or PPDUs on non-primary subchannels when it is associated with the AP.

[0165] In some implementations, in BSS-level signaling, a STA may report to its associated AP a list of OBSS APs from which the STA may detect transmissions. In some implementations, an AP may broadcast a list of OBSS APs that may allow ESR operation in a broadcast frame, such as a beacon frame.

[0166] In some implementations, when an OBSS STA identifies an ESR opportunity, the OBSS STA may temporarily switch to monitoring the puncturing subchannel. An exemplary STA_OBSS_B behavior is given below:

[0167] In some implementations, STA_OBSS_B may receive a list of OBSS APs that may allow ESR operation (which may be referred to as an ESR-enabled OBSS AP list) from its associated AP. In some implementations, STA_OBSS_B may detect ESRR PPDU transmissions from OBSS APs / STAs. In some specific implementations, STA_OBSS_B may switch to a monitoring puncturing subchannel, which may be a non-primary subchannel for STA_OBSS_B, if one or more (or all) of the following conditions are met: the BSS color carried in the ESRR PPDU may match the BSS color of an OBSS AP in the ESR-enabled OBSS AP list; the transmit address (or receive address) field in the MAC frame carried by the ESRR PPDU may match the basic service set identifier (BSSID) of an AP in the ESR-enabled OBSS AP list; one or more subchannels are punctured in the ESRR PPDU transmission; the duration field of the MAC frame carried in the ESRR PPDU may be longer than a predefined or predetermined threshold; the UL length field of the trigger frame carried in the ESRR PPDU may indicate a duration longer than a predefined or predetermined threshold; and / or ESR_ALLOW is indicated in the ESRR PPDU or in a MAC frame carried by the ESRR PPDU. In some implementations, STA_OBSS_B may switch back to monitoring its primary subchannel after the duration identified by the ESRR PPDU for enhanced spatial sharing expires.

[0168] Some implementations involve enhanced spatial multiplexing based on power detection (PD).

[0169] Fig.17 1700 is a diagram illustrating an example process 1700 involving PD-based enhanced spatial multiplexing. The example process 1700 includes an AP 1702, a STA 1704 in a BSS of the AP 1702, and a STA OBSS-A 1706 (STA from OBSS (OBSS-A)) and STA OBSS-B 1708 (occurs between STAs from different OBSSs (OBSS-B)). Fig.17In the example, AP 1702 may acquire the wireless medium and determine that ESR operation is allowed by sending a first frame (such as modified MU-RTS frame 1710). The first frame or the PPDU carrying the first frame may carry one or more or all of the following fields: an indication that ESR operation is allowed for the OBSS STA; perforated channel information (e.g., used to notify the OBSS STA of the perforated subchannels in the main transmission); BSS color or BSSID (e.g., used to notify the OBSS STA that the main transmission may come from the OBSS STA); and / or duration or TXOP duration field (e.g., used to notify the OBSS STA of the duration of the main transmission (e.g., duration 1720)). It should be noted that the example transmission from and to AP1 1702 may be referred to as the main transmission.

[0170] In some implementations, a STA (e.g., STA 1704) that is an intended receiver of a first frame (e.g., modified MU-RTS frame 1710) may respond with a second frame (e.g., clear to send (CTS) frame 1730). The AP 1702 and STA 1704 may exchange frames (e.g., data frames 1720 and block acknowledgement frames 1799) following the modified MU-RTS and CTS frames using unpunctured subchannels.

[0171] In some implementations, an OBSS STA (eg, STA OBSS-A 1706) may receive a first frame (e.g., a modified MU-RTS frame 1710) and / or a second frame (e.g., a clear to send (CTS) frame 1730). The first frame (e.g., the modified MU-RTS frame 1710) and / or the second frame (e.g., the clear to send (CTS) frame 1730) may include punctured channel / subchannel information. OBSS-A 1706) may set the RXVECTOR parameter based on the reception of the PPDU corresponding to the first frame (e.g., the modified MU-RTS frame 1710) and / or the second frame (e.g., the clear to send (CTS) frame 1730). For example, if the first frame carries a trigger frame, the OBSS STA (e.g., the STA OBSS-A1706) The RXVECTOR parameter SPATIAL_REUSE may be set to a value carried in the spatial multiplexing field in the common information field and / or the special user information field; the RXVECTOR parameter SPATIAL_REUSE may be set to a value carried in the PHY signaling field or the SERVICE field in the data field; the RXVECTOR parameter INACTIVE_SUBCHANNEL may be set to indicate a punctured subchannel in a control frame; and / or the TXVECTOR parameter SPATIAL_REUSE may be set to ESR_ALLOW or another value indicating that spatial multiplexing is allowed on the punctured subchannel.

[0172] In some implementations, an OBSS STA (e.g., STA OBSS-A 1706) may identify ESR opportunities in the puncturing subchannel: OBSS STA (eg, STA OBSS-A 1706) receiving a PHY-RXSTART.indication corresponding to the reception of a PPDU (the PPDU carries the first frame and / or the second frame and is identified as an inter-BSS PPDU by checking that the RXVECTOR parameter BSS_COLOR is not 0 or is the same as the BSS color of the OBSS STA itself); the OBSS STA (e.g., STA OBSS-A 1706) receiving a PHY-RXSTART.indication corresponding to reception of a PPDU carrying a first frame and / or a second frame identified as having one or more punctured subchannels; a received signal strength level measured in the punctured subchannel is below a predefined or predetermined threshold; and / or an OBSS STA (e.g., STA OBSS-A 1706) has a PPDU in the queue for transmission, and the destination STA (e.g., STA OBSS-B 1708) has the ability to receive PD-based ESR PPDU.

[0173] The OBSS STA (eg, STA OBSS-A 1706) may issue a PHY-CCARESET.request primitive 1792 and not perform a NAV update operation based on the reception of the PPDU carrying the first frame and / or the second frame. In some implementations, an OBSS STA (e.g., STA OBSS-A 1706) may have the ability to maintain primitives and / or NAV updates in each subchannel. In some implementations, an OBSS STA (e.g., STA OBSS-A1706) A PHY-CCARESET.request primitive 1792 may be issued and a NAV update operation may not be performed on the punctured subchannel based on the reception of the PPDU.

[0174] In some implementations, a STA (eg, STA OBSS-A 1706) may issue a PHY-CCARESET.request primitive 1792 (in the punctured subchannel) to ignore the associated PPDU that may carry a data frame within aSIFSTime+aRxPHYStartDelay+2×aSlotTime at the end of the last air symbol of the second control frame (e.g., CTS frame 1730).

[0175] In some implementations, the PHY-CCARESET.request primitive or the PHY-CCARESET.request primitive in the puncturing subchannel 1792 may be issued at the end of the PPDU carrying the second control frame (eg, the CTS frame 1730).

[0176] In some implementations, an OBSS STA (eg, STA OBSS-A 1706) may follow the ESR backoff process. In some implementations, an OBSS STA (e.g., STA OBSS-A 1706) may maintain a single backoff process across the entire bandwidth. If an ESR opportunity is identified, the OBSS STA (e.g., STA OBSS-A 1706) The countdown of the existing backoff process may continue as long as the medium condition on the puncturing subchannel is not otherwise indicated as "busy". OBSS-A 1706) may acquire the medium when the backoff counter reaches zero. In some implementations, an OBSS STA (e.g., STA OBSS-A 1706) may maintain a backoff process on each subchannel. If an ESR opportunity is identified, the OBSS STA (e.g., STA OBSS-A 1706) The countdown of the existing backoff process may continue as long as the medium condition on the puncturing subchannel is not otherwise indicated as "busy". OBSS-A 1706) may acquire the medium when all backoff counters reach zero. In some implementations, an OBSS STA (e.g., STA OBSS-A1706) may be sent within aSIFSTime+aRxPHYStartDelay+2×aSlotTime (or aSIFSTime+aRxPHYStartDelay+2×aSlotTime) of the end of the last air symbol of the PPDU containing the first frame and / or the second frame.

[0177] In some implementations, an OBSS STA (eg, STA OBSS-A 1706) may send a signal to another OBSS STA (eg, STA OBSS-B 1708) transmits a PPDU that may carry a data frame 1750 (or other type of frame). In some implementations, the transmission of the PPDU carrying the data frame 1750 may be terminated before the end of the PPDU carrying the data frame 1714 in the primary transmission. In some implementations, the transmission to another OBSS STA (e.g., STA 1708) on the punctured subchannel may be terminated before the end of the duration 1720 indicated in the duration field or the TXOP duration field in the first frame or second frame transmission in the primary transmission. OBSS-B 1708). In some implementations, the PPDU may be sent to another OBSSSTA (eg, STA OBSS-B 1708). The transmit power may be calculated based on existing OBSS PD operations. In some implementations, a puncturing subchannel may be sent to another OBSS STA (e.g., STA OBSS-B The PPDU carrying data frame 1750 of 1708) may carry a MAC frame, wherein in the MAC header, one or more bits may be used to indicate that this is an ESR PPDU. For example, in the A control field, one bit may indicate whether the transmission is a PPDU. Alternatively or additionally, the PPDU indication may be carried in the PHY signaling or SERVICE field.

[0178] OBSS STA (for example, STA OBSS-B 1708 or other STA supporting ESR operation), which is the intended receiver of the PPDU carrying the data frame 1750 in the puncturing subchannel, may follow the following example process: STA OBSS-B 1708 may monitor the first frame and / or the second frame sent in the primary transmission. STA OBSS-B 1708 can be used with STA OBSS-A 1706 The same process is used to identify ESR opportunities. OBSS-B 1708 may switch to monitoring the puncturing subchannel during the duration 1720 identified in the duration field and / or the TXOP duration field in the first control frame transmission and / or the second control frame transmission. STAOBSS-B 1708 can be detected by STA OBSS-A 1706 transmits a PPDU carrying a data frame 1714, and can determine whether the PPDU is an ESR transmission by checking the ESR PPDU indication in the PPDU PHY signaling, MAC header, or SERVICE field. If any CCA, PSR, and PD requirements may not be met or the STA OBSS-B 1708 has a non-zero NAV setting, the STA OBSS-B A response frame (eg, block acknowledgment 1760) may not be sent. If the transmission of the response frame may end after the duration 1720 identified in the duration field or the TXOP duration field of the first and second frames, the STA OBSS-B A response frame (eg, block ACK 1760) may not be sent at 1708. The response frame (eg, block ACK 1760) may be power controlled and sent on the punctured subchannel.

[0179] It should be noted that the MU-RTS frame 1710 and the CTS frame 1730 are used as examples of the first frame and the second frame, and other control frames may be used in other specific implementations. For example, the first control frame may be a BSRP trigger frame, and the second frame may be a TB PPDU with a BSR. In some specific implementations, the information mentioned in the process, such as perforated channel information, ESR indication, BSS color, ESR duration, etc., may be carried in the first MAC frame or the second MAC frame or the PPDU carrying the MAC frame. In some specific implementations, a STA that supports ESR operation or PD-based ESR operation may report the capability to the associated AP in a capability element / field in a management frame (or control / data frame).

[0180] Some implementations involve enhanced spatial multiplexing where multiple generations of WiFi devices coexist. For example, in some implementations, if an OBSS HE STA identifies a PSR opportunity and a PSRR PPDU is a trigger frame, the OBSS STA only needs to follow the spatial multiplexing subfield in the common field of the trigger frame. In some implementations, if an OBSS EHT STA identifies a PSR opportunity and a PSRR PPDU is a trigger frame, the OBSS EHT STA may have different options to obtain PSR information. For example, if the trigger frame is an HE variant, the OBSS EHT STA may obtain the PSR value from the spatial multiplexing subfield in the common information field of the trigger frame; if the trigger frame is an EHT variant, the PSR value may be obtained from the spatial multiplexing subfield in the special user information field of the trigger frame; if B54 and B55 in the common information field of the trigger frame are equal to 0, the PSR value may be obtained from the spatial multiplexing subfield in the special user information field of the trigger frame, otherwise the PSR value may be obtained from the spatial multiplexing subfield in the common information field of the trigger frame; and / or if B55 in the common information field of the trigger frame is 0, the PSR value may be obtained from the spatial multiplexing subfield in the special user information field of the trigger frame, otherwise the PSR value may be obtained from the spatial multiplexing subfield in the common information field of the trigger frame.

[0181] Some implementations involve enhancement of the HE spatial multiplexing subfield of the trigger frame and the EHT spatial multiplexing subfield of the trigger frame. With respect to the enhancement of the HE spatial multiplexing subfield of the trigger frame, in some implementations, if a STA supporting the transmission of a PSRT PPDU based on HE PSR identifies a PSR opportunity and the PSRR PPDU bandwidth is greater than 80 MHz, the STA may obtain the PSR value for each subchannel with a bandwidth of BW1 from the UL spatial multiplexing subfield of the HE variant common information field of the trigger frame (e.g., PSRR PPDU). In some implementations, the STA may do so by performing one or more of the following options 1, 2, 3, and / or 4:

[0182] 1) Obtain a numerical PSR value and convert the PSR value to a linear domain; divide the linear domain value by a constant c1, where c1 is a function of BW1 and a subchannel bandwidth BW2 (defined for the PSR value in the UL spatial multiplexing subfield of the HE variant common information field), e.g., BW1=20 MHz, BW2=40 MHz, then c1=(BW2 / BW1) 2 =4, and convert the newly obtained linear domain value into the dB domain. For example, if the value obtained from the UL Spatial Multiplexing subfield of the HE Variant Common Information field of the trigger frame (PSRR PPDU) is 10, which corresponds to a PSR value of -38dB, then -38dB is converted to 10 in the linear domain. (-38 / 10), and divide the linear value by c1 (c1=4), and the normalized PSR value (in dB domain) for each 20MHz subchannel is 10log10 (10 (-38 / 10) / c1)=10log10(10 (-38 / 10) / )=-44.0.

[0183] 2) Obtain the numerical PSR value (in dB domain) and subtract a constant c2 from the numerical PSR value, where c2 is a function of BW1 and the subchannel bandwidth BW2 (defined for the PSR value in the UL Spatial Multiplexing subfield of the HE Variant Common Information field), e.g., BW1 = 20 MHz, BW2 = 40 MHz, c2 = 10log10 ((BW2 / BW1) 2 )=6dB. For example, if the value obtained from the UL spatial multiplexing subfield of the HE variant common information field of the trigger frame (PSRR PPDU) is 10, which corresponds to a PSR value of -38dB. Then the normalized PSR value (in the dB domain) for each 20MHz subchannel is -38-c2=-38-6=-44.

[0184] 3) Obtain a value from the UL Spatial Multiplexing subfield of the HE Variant Common Information field of the trigger frame (PSRR PPDU), and subtract a constant c3 from the value, where c3 is a function constructed from BW1, the subchannel bandwidth BW2 (defined for the PSR value in the UL Spatial Multiplexing subfield of the HE Variant Common Information field), and a mapping table (mapping between the value in the UL Spatial Multiplexing subfield and the PSR value). For example, BW1 = 20 MHz, BW2 = 40 MHz, 10log10 ((BW2 / BW1) 2 )=6dB, which corresponds to a two-row difference in the table for the spatial multiplexing field encoding of the HE TB PPDU, i.e., c3=2. Based on the table for the spatial multiplexing field encoding of the HE TB PPDU, the newly obtained value is mapped to the corresponding PSR value, and the PSR value is a normalized value. For example, if the value obtained from the UL spatial multiplexing subfield of the HE variant common information field of the trigger frame (PSRR PPDU) is 10; subtract c3 from 10, i.e., 10-2=8. Based on the mapping table (e.g., the table for the spatial multiplexing field encoding of the HE TB PPDU), the corresponding PSR mapped to 8 is -44dBm. Then the normalized PSR value (in the dB domain) for each 20MHz subchannel is -44.

[0185] Regarding the enhancement of EHT spatial multiplexing of the subfields of the trigger frame, in some specific implementations, an AP sending a trigger frame with a parameter (e.g., dot11EHT PSRBasedSRImplemented) set to true may select a value (PSR value) in the mapping table encoded in the spatial multiplexing field that is less than or equal to the calculated MAC parameter (which may be referred to as PSR INPUT ) to set the value of the EHT Spatial Multiplexing subfield of the Special User Information field for each 20 MHz subchannel of a 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz PPDU. INPUT It may be a function of two parameters, for example, one of which is the total transmit power Tx_PWR_AP (in dBm) at the AP antenna connector for a 20 MHz sub-channel across all antennas used to transmit the PSRR PPDU containing the trigger frame, and the other is the acceptable receiver interference level (in dBm) for the 20 MHz sub-channel, (referred to as the acceptable receiver interference level AP ). For example, in some implementations, PSR INPUT It can be expressed as:

[0186]

[0187] For example, in the case where there are two EHT spatial multiplexing subfields: 1) If the PSRR PPDU bandwidth is 20MHz or 40MHz, the EHT spatial multiplexing 1 subfield is applied to the lower 20MHz subband in the frequency; if the PSRR PPDU bandwidth is 80MHz, the EHT spatial multiplexing 1 subfield is applied to each 20MHz subchannel in the lowest 40MHz subband in the frequency within the 80MHz operating bandwidth; if the PSRR PPDU bandwidth is 160MHz, the EHT spatial multiplexing 1 subfield is applied to each 20MHz subchannel in the lowest 80MHz subband in the frequency within the 160MHz operating bandwidth; if the PSRR PPDU bandwidth is 320MHz, the EHT spatial multiplexing 1 subfield is applied to each 20MHz subchannel in the lowest 160MHz subchannel in the frequency within the 320MHz operating bandwidth. 2) If the PSRR PPDU bandwidth is 20MHz, the value of the EHT spatial multiplexing 2 subfield is the same as the value indicated in the EHT spatial multiplexing 1 subfield. If the PSRR PPDU bandwidth is 40MHz, the EHT Spatial Multiplexing 2 subfield applies to the highest 20MHz subband in the frequency; if the PSRR PPDU bandwidth is 80MHz, the EHT Spatial Multiplexing 2 subfield applies to each 20MHz subchannel in the highest 40MHz subband in the frequency within the 80MHz operating bandwidth; if the PSRR PPDU bandwidth is 160MHz, the EHT Spatial Multiplexing 2 subfield applies to each 20MHz subchannel in the highest 80MHz subband in the frequency within the 160MHz operating bandwidth; if the PSRR PPDU bandwidth is 320MHz, the EHT Spatial Multiplexing 2 subfield applies to each 20MHz subchannel in the highest 160MHz subchannel in the frequency within the 320MHz operating bandwidth.

[0188] Alternatively, in some implementations, an AP transmitting a trigger frame with a parameter (e.g., dot11EHTPSRBasedSRImplemented) set to true may set the value of the EHT Spatial Multiplexing subfield of the Special User Information field for one 20 MHz subchannel of a 20 MHz, 40 MHz, or 80 MHz PPDU or one 40 MHz subchannel for a 160 MHz or 320 MHz PPDU. Define a corresponding total transmit power Tx_PWR_AP (e.g., in dBm) at the AP antenna connector for one 20 MHz subchannel of a 20 MHz, 40 MHz, or 80 MHz PPDU or a 40 MHz subchannel for a 160 MHz or 320 MHz PPDU on all antennas used to transmit the PSRR PPDU containing the trigger frame. Define an acceptable receiver interference level (e.g., in dBm) for a 20 MHz subchannel of a 20 MHz, 40 MHz, or 80 MHz PPDU or a 40 MHz subchannel for a 160 MHz or 320 MHz PPDU. AP In this setting, to obtain the PSR value of the 20 MHz subchannel when the PSRR PPDU bandwidth is greater than 80 MHz, a similar normalization method as described with respect to the enhancement of the HE spatial multiplexing subfield of the trigger frame may be used for the EHT STA.

[0189] Some specific implementations provide a method for parameterized spatial multiplexing (PSR), which is implemented in a station (STA). A parameterized spatial multiplexing reception (PSRR) physical layer protocol data unit (PPDU) including a trigger frame is received from an access point (AP). A parameterized spatial multiplexing transmission (PSRT) PPDU is sent based on information in the PSRR PPDU. The PSRT PPDU includes at least one padding field.

[0190] In some implementations, the padding field is configured to align the end of the PSRT PPDU with the end of a triggered (TB) PPDU sent by a station (STA) in a basic service set (BSS) of the AP. In some implementations, the STA is not within the BSS of the AP. In some implementations, the trigger frame includes an EHT spatial multiplexing subfield having a value based on a 20 megahertz (MHz) subchannel. In some implementations, the trigger frame includes a spatial multiplexing subfield in a common information field. In some implementations, the PSRT PPDU includes power control information for a subsequent response frame. In some implementations, the power control information indicates a minimum receive power for successfully receiving the subsequent response frame.

[0191] Some specific implementations provide a station (STA) configured for parameterized spatial multiplexing (PSR). The STA includes a circuit system configured to receive a parameterized spatial multiplexing reception (PSRR) physical layer protocol data unit (PPDU) including a trigger frame from an access point (AP). The STA also includes a circuit system configured to send a parameterized spatial multiplexing transmission (PSRT) PPDU based on information in the PSRR PPDU. The PSRT PPDU includes at least one padding field. In some specific implementations, the padding field is configured to align the end of the PSRT PPDU with the end of a triggered (TB) PPDU sent by a station (STA) in a basic service set (BSS) of the AP. In some specific implementations, the STA is not within the BSS of the AP. In some specific implementations, the trigger frame includes an EHT spatial multiplexing subfield having a value based on a 20 megahertz (MHz) subchannel. In some specific implementations, the trigger frame includes a spatial multiplexing subfield in a common information field. In some specific implementations, the PSRT PPDU includes power control information for a subsequent response frame. In some implementations, the power control information indicates a minimum receive power for successfully receiving the subsequent response frame.

[0192] Some embodiments provide a method for enhanced spatial multiplexing (ESR). Receive an enhanced spatial multiplexing receive (ESRR) physical protocol data unit PPDU including a trigger frame indicating that at least one subchannel can be punctured, and a duration of an ESR operation. Based on the ESRR PPDU, transmit an enhanced spatial multiplexing transmit (ESRT) PPDU on at least one punctured subchannel on an ESR opportunity. Response to the ESRT PPDU on the at least one punctured subchannel.

[0193] In some implementations, the duration is indicated in the common information field. In some implementations, the ESRR PPDU carries a MAC frame of a request response frame. In some implementations, the duration indicates a time slot on which the NAV setting on the primary channel can be ignored to transmit on the at least one punctured subchannel. In some implementations, if a STA supporting the transmission of a PSRT PPDU based on the HE PSR identifies a PSR opportunity and the PSRR PPDU bandwidth is greater than 80 MHz, the STA obtains the PSR value for each subchannel with a bandwidth of BW1 from the UL spatial multiplexing subfield of the HE variant common information field of the trigger frame. In some implementations, the value of the EHT spatial multiplexing subfield of the special user information field is set for each 20 MHz subchannel of a 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz PPDU by selecting a row in a mapping table encoded in the spatial multiplexing field whose value (PSR value) is less than or equal to the highest value of the calculated MAC parameter.

[0194] Some specific implementations provide a method for parameterized spatial multiplexing (PSR), which is implemented in a station (STA). A parameterized spatial multiplexing reception (PSRR) physical layer protocol data unit (PPDU) including a trigger frame is received from an access point (AP). A parameterized spatial multiplexing transmission (PSRT) PPDU is sent based on the information in the PSRR PPDU. The STA obtains the information from a field in the PSRR PPDU, which is selected based on a variant of the trigger frame. In some specific implementations, in response to the trigger frame being a high-efficiency (HE) variant trigger frame, the STA obtains the information from at least one spatial multiplexing subfield in the common information field of the trigger frame. In some specific implementations, in response to the trigger frame being an extremely high throughput (EHT) variant trigger frame, the STA obtains the information from at least one special user information field of the trigger frame. In some specific implementations, the information includes PSR information.

[0195] Some specific implementations provide a method for parameterized spatial multiplexing (PSR), which is implemented in a station (STA). A parameterized spatial multiplexing reception (PSRR) physical layer protocol data unit (PPDU) including a trigger frame is received from an access point (AP). A parameterized spatial multiplexing transmission (PSRT) PPDU is sent based on information in the PSRR PPDU. The STA obtains the information from a portion of the PSRR PPDU, the portion being selected based on a value in the trigger frame.

[0196] In some implementations, the value in the trigger frame includes a value in a common information field of the trigger frame. In some implementations, the value in the trigger frame includes bits 54 and 55 in the common information field of the trigger frame. In some implementations, in response to bits 54 and 55 in the common information field of the trigger frame being equal to zero, the STA obtains the information from the spatial multiplexing subfield in the special user information field of the trigger frame. In some implementations, in response to an HE variant trigger frame, the STA obtains the information from the spatial multiplexing subfield in the common information field of the trigger frame. In some implementations, in response to an EHT variant trigger frame, the STA obtains the information from the spatial multiplexing subfield in the special user information field of the trigger frame. In some implementations, in response to bit 55 in the common information field of the trigger frame being equal to zero, the STA obtains the information from the spatial multiplexing subfield in the special user information field of the trigger frame. In some implementations, the information includes PSR information.

[0197] Although features and elements are described above in specific combinations, it will be understood by those of ordinary skill in the art that each feature or element may be used alone or in any combination with other features and elements. In addition, the methods described herein may be implemented in a computer program, software, or firmware incorporated in a computer-readable medium for execution by a computer or processor. Examples of computer-readable media include electronic signals (sent via a wired or wireless connection) and computer-readable storage media. Examples of computer-readable storage media include, but are not limited to, read-only memory (ROM), random access memory (RAM), registers, cache memory, semiconductor memory devices, magnetic media (such as built-in hard disks and removable disks), magneto-optical media, and optical media (such as CD-ROM disks and digital versatile disks (DVDs)). A processor associated with software may be used to implement a radio frequency transceiver for a WTRU, UE, terminal, base station, RNC, or any host computer.

Claims

1. A method for parameterized spatial reuse (PSR), the method being implemented in a station (STA), the method comprising: receiving a parameterized spatial multiplexing receive (PSRR) physical layer protocol data unit (PPDU) including a trigger frame from an access point (AP); as well as Sending a parameterized spatial multiplexing transmission (PSRT) PPDU based on the information in the PSRR PPDU; The PSRT PPDU includes at least one padding field.

2. The method of claim 1, wherein the padding field is configured to align an end of the PSRT PPDU with an end of a triggered (TB) PPDU sent by a station (STA) in a basic service set (BSS) of the AP. The method of claim 1 , wherein the STA is not within the BSS of the AP. 4 . The method of claim 1 , wherein the trigger frame includes an EHT spatial multiplexing subfield having a value based on a 20 megahertz (MHz) subchannel. The method of claim 1 , wherein the trigger frame comprises a spatial multiplexing subfield in a common information field.

6. The method of claim 1, wherein the PSRT PPDU includes power control information for a subsequent response frame.

7. The method according to claim 6, wherein the power control information indicates a minimum reception power for successfully receiving the subsequent response frame.

8. A station (STA) configured for parameterized spatial reuse (PSR), the STA comprising: circuitry configured to receive a parameterized spatial multiplexing reception (PSRR) physical layer protocol data unit (PPDU) including a trigger frame from an access point (AP); and circuitry configured to transmit a parameterized spatial multiplexing transmission (PSRT) PPDU based on information in the PSRR PPDU; The PSRT PPDU includes at least one padding field.

9. The STA of claim 8, wherein the padding field is configured to align an end of the PSRT PPDU with an end of a triggered (TB) PPDU transmitted by a station (STA) in a basic service set (BSS) of the AP.

10. The STA of claim 8, wherein the STA is not within the BSS of the AP. 11 . The STA of claim 8 , wherein the trigger frame includes an EHT spatial multiplexing subfield having a value based on a 20 megahertz (MHz) subchannel.

12. The STA of claim 8, wherein the trigger frame comprises a spatial multiplexing subfield in a common information field.

13. The STA of claim 8, wherein the PSRT PPDU includes power control information for a subsequent response frame. 14 . The STA according to claim 13 , wherein the power control information indicates a minimum reception power for successfully receiving the subsequent response frame.

15. A method for enhanced spatial multiplexing (ESR), the method comprising: receiving an enhanced spatial multiplexing receive (ESRR) physical protocol data unit (PPDU) including a trigger frame indicating that at least one subchannel can be punctured and a duration of an ESR operation; Based on the ESRR PPDU, transmitting an enhanced spatial multiplexing transmission (ESRT) PPDU on at least one punctured subchannel on the ESR opportunity; as well as A response to the ESRT PPDU is received on the at least one punctured subchannel. The method of claim 15 , wherein the duration is indicated in a common information field.

17. The method of claim 15, wherein the ESRR PPDU carries a MAC frame requesting a response frame.

18. The method of claim 15, wherein the duration indicates a time slot at which a NAV setting on a primary channel can be ignored to transmit on the at least one punctured subchannel.

19. The method of claim 15, wherein if a STA supporting HE PSR-based PSRT PPDU transmission identifies a PSR opportunity and a PSRR PPDU bandwidth is greater than 80 MHz, the STA obtains a PSR value for each subchannel having a bandwidth BW1 from a UL spatial multiplexing subfield of a HE variant common information field of the trigger frame.

20. The method according to claim 15, further comprising: The value of the EHT spatial multiplexing subfield of the special user information field is set for each 20 MHz subchannel of a 20 MHz, 40 MHz, 80 MHz, 160 MHz, or 320 MHz PPDU by selecting the row whose numerical value or PSR value is the highest value less than or equal to the value of the calculated MAC parameter in the mapping table encoded in the spatial multiplexing field.

21. A method for parameterized spatial reuse (PSR), the method being implemented in a station (STA), the method comprising: receiving a parameterized spatial multiplexing receive (PSRR) physical layer protocol data unit (PPDU) including a trigger frame from an access point (AP); as well as Sending a parameterized spatial multiplexing transmission (PSRT) PPDU based on the information in the PSRR PPDU; The STA obtains the information from a field in the PSRR PPDU, wherein the field is selected based on a variant of the trigger frame.

22. The method of claim 21, wherein in response to the trigger frame being a high efficiency (HE) variant trigger frame, the STA obtains the information from at least one spatial multiplexing subfield in a common information field of the trigger frame.

23. The method of claim 21, wherein in response to the trigger frame being an Extremely High Throughput (EHT) variant trigger frame, the STA obtains the information from at least one special user information field of the trigger frame.

24. The method of claim 21, wherein the information comprises PSR information.

25. A method for parameterized spatial reuse (PSR), the method being implemented in a station (STA), the method comprising: receiving a parameterized spatial multiplexing receive (PSRR) physical layer protocol data unit (PPDU) including a trigger frame from an access point (AP); as well as Sending a parameterized spatial multiplexing transmission (PSRT) PPDU based on the information in the PSRR PPDU; The STA obtains the information from a portion of the PSRR PPDU, wherein the portion is selected based on a value in the trigger frame.

26. The method of claim 25, wherein the value in the trigger frame comprises a value in a common information field of the trigger frame.

27. The method of claim 25, wherein the value in the trigger frame comprises bits 54 and 55 in a common information field of the trigger frame.

28. The method of claim 25, wherein in response to bits 54 and 55 in the common information field of the trigger frame being equal to zero, the STA obtains the information from the spatial multiplexing subfield in the special user information field of the trigger frame.

29. The method of claim 25, wherein in response to an HE variant trigger frame, the STA obtains the information from a spatial multiplexing subfield in a common information field of the trigger frame.

30. The method of claim 25, wherein in response to an EHT variant trigger frame, the STA obtains the information from a spatial multiplexing subfield in a special user information field of the trigger frame.

31. The method of claim 25, wherein in response to bit 55 in the common information field of the trigger frame being equal to zero, the STA obtains the information from the spatial multiplexing subfield in the special user information field of the trigger frame.

32. The method of claim 25, wherein the information comprises PSR information.

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