[go: up one dir, main page]

WO2025207891A1 - Informations de formation de faisceau réutilisables au niveau d'une station - Google Patents

Informations de formation de faisceau réutilisables au niveau d'une station

Info

Publication number
WO2025207891A1
WO2025207891A1 PCT/US2025/021765 US2025021765W WO2025207891A1 WO 2025207891 A1 WO2025207891 A1 WO 2025207891A1 US 2025021765 W US2025021765 W US 2025021765W WO 2025207891 A1 WO2025207891 A1 WO 2025207891A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
sta
precoding information
ppdu
index
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/US2025/021765
Other languages
English (en)
Inventor
Leonardo Alisasis LANANTE
Jeongki Kim
Esmael Hejazi DINAN
Serhat Erkucuk
Tuncer Baykas
Jiayi Zhang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ofinno LLC
Original Assignee
Ofinno LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ofinno LLC filed Critical Ofinno LLC
Publication of WO2025207891A1 publication Critical patent/WO2025207891A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/04—Scheduled access
    • H04W74/06—Scheduled access using polling

Definitions

  • FIG. 1 illustrates example wireless communication networks in which embodiments of the present disclosure may be implemented.
  • FIG. 2 is a block diagram illustrating example implementations of a station (STA) and an access point (AP).
  • STA station
  • AP access point
  • FIG. 4 illustrates a High Efficiency (HE) Single User (SU) PPDU, an HE Multi-User (MU) PPDU, and an HE Extended Range (ER) SU PPDU.
  • HE High Efficiency
  • SU Single User
  • MU HE Multi-User
  • ER HE Extended Range
  • FIG. 5 illustrates an Extremely High Throughput (EHT) Multi-user (MU) PPDU.
  • EHT Extremely High Throughput
  • MU Multi-user
  • FIG. 6 illustrates examples of Trigger Based (TB) PPDUs which may be used by a STA for UL OFDMA or UL MU MIMO.
  • FIG. 7 illustrates an example trigger frame.
  • FIG. 8 illustrates an example Common Info field.
  • FIG. 9 illustrates an example management frame which may be used as an action frame.
  • FIG. 11 illustrates an example of a multi-user (MU) beamforming procedure.
  • FIG. 12 illustrates an example of an uplink beamforming procedure.
  • FIG. 13 illustrates an example of an uplink beamforming procedure.
  • FIG. 14 illustrates an example that highlights a problem that may arise in association with an uplink beamforming procedure.
  • FIG. 15 illustrates an example uplink beamforming procedure, according to an embodiment.
  • FIG. 17 illustrates an example uplink beamforming procedure, according to an embodiment.
  • FIG. 18 illustrates an example process according to an embodiment.
  • FIG. 19 illustrates another example process according to an embodiment. DETAILED DESCRIPTION
  • the term “comprises” is interchangeable with “includes” and does not exclude unenumerated components from being included in the element being described. By contrast, “consists of provides a complete enumeration of the one or more components of the element being described.
  • the term “based on”, as used herein, may be interpreted as “based at least in part on” rather than, for example, “based solely on”.
  • the term “and/or” as used herein represents any possible combination of enumerated elements. For example, “A, B, and/or C” may represent A; B; C; A and B; A and C; B and C; or A, B, and C.
  • a and B are sets and every element of A is an element of B, A is called a subset of B.
  • A is called a subset of B.
  • possible subsets of B ⁇ STA1, STA2) are: ⁇ STA1 ⁇ , ⁇ STA2 ⁇ , and ⁇ STA1, STA2).
  • the phrase “based on” is indicative that the phrase following the term “based on” is an example of one of a multitude of suitable possibilities that may, or may not, be employed to one or more of the various embodiments.
  • phrases “in response to” is indicative that the phrase following the phrase “in response to” is an example of one of a multitude of suitable possibilities that may, or may not, be employed to one or more of the various embodiments.
  • the phrase “depending on” is indicative that the phrase following the phrase “depending on” is an example of one of a multitude of suitable possibilities that may, or may not, be employed to one or more of the various embodiments.
  • the term configured may relate to the capacity of a device whether the device is in an operational or non- operational state. Configured may refer to specific settings in a device that effect the operational characteristics of the device whether the device is in an operational or non-operational state. In other words, the hardware, software, firmware, registers, memory values, and/or the like may be “configured” within a device, whether the device is in an operational or nonoperational state, to provide the device with specific characteristics. Terms such as “a control message to cause in a device” may mean that a control message has parameters that may be used to configure specific characteristics or may be used to implement certain actions in the device, whether the device is in an operational or non-operational state.
  • parameters may comprise one or more information objects, and an information object may comprise one or more other objects.
  • an information object may comprise one or more other objects.
  • parameter (IE) N comprises parameter (IE) M
  • parameter (IE) M comprises parameter (IE) K
  • parameter (IE) K comprises parameter (information element) J.
  • N comprises K
  • N comprises J.
  • a parameter in the plurality of parameters is in at least one of the one or more messages/frames but does not have to be in each of the one or more messages/frames.
  • modules may be possible to implement modules using physical hardware that incorporates discrete or programmable analog, digital and/or quantum hardware.
  • programmable hardware comprise computers, microcontrollers, microprocessors, application-specific integrated circuits (ASICs); field programmable gate arrays (FPGAs); and complex programmable logic devices (CPLDs).
  • Computers, microcontrollers, and microprocessors are programmed using languages such as assembly, C, C++ or the like.
  • FPGAs, ASICs and CPLDs are often programmed using hardware description languages (HDL) such as VHSIC hardware description language (VHDL) or Verilog that configure connections between internal hardware modules with lesser functionality on a programmable device.
  • HDL hardware description languages
  • VHDL VHSIC hardware description language
  • Verilog Verilog
  • FIG. 1 illustrates example wireless communication network 100 in which embodiments of the present disclosure may be implemented.
  • the example wireless communication networks may include an Institute of Electrical and Electronic Engineers (IEEE) 802.11 (WLAN) infra-structure network 102.
  • WLAN infra-structure network 102 may include one or more basic service sets (BSSs) 110 and 120 and a distribution system (DS) 130.
  • BSSs basic service sets
  • DS distribution system
  • DS 130 may be configured to connect BSS 110-1 and BSS 110-2. As such, DS 130 may enable an extended service set (ESS) 150. Within ESS 150, APs 104-1 and 104-2 are connected via DS 130and may have the same service set identification (SSID).
  • ESS 150 extended service set
  • APs 104-1 and 104-2 are connected via DS 130and may have the same service set identification (SSID).
  • SSID service set identification
  • a physical layer (PHY) protocol data unit may be a composite structure that includes a PHY preamble and a payload in the form of a PLCP service data unit (PSDU).
  • PSDU may include a PHY Convergence Protocol (PLCP) preamble and header and/or one or more MAC protocol data units (MPDUs).
  • PLCP PHY Convergence Protocol
  • MPDUs MAC protocol data units
  • the information provided in the PHY preamble may be used by a receiving device to decode the subsequent data in the PSDU.
  • the preamble fields may be duplicated and transmitted in each of the multiple component channels.
  • a frequency band may include one or more sub-bands or frequency channels.
  • PPDUs conforming to the IEEE 802.11n, 802.11ac, 802.11 ax and/or 802.11 be standard amendments may be transmitted over the 2.4 GHz, 5 GHz, and/or 6 GHz bands, each of which may be divided into multiple 20 MHz channels.
  • the PPDUs may be transmitted over a physical channel having a minimum bandwidth of 20 MHz. Larger channels may be formed through channel bonding.
  • PPDUs may be transmitted over physical channels having bandwidths of 40 MHz, 80 MHz, 160 MHz, or 520 MHz by bonding together multiple 20 MHz channels.
  • FIG. 2 is a block diagram 200 illustrating example implementations of a STA 210 and an AP 260.
  • STA 210 may include at least one processor 220, a memory 230, and at least one transceiver 240.
  • AP 260 may include at least one processor 270, a memory 280, and at least one transceiver 290.
  • Processor 220/270 may be operatively connected to memory 230/280 and/or to transceiver 240/290.
  • Memory 230/280 may include a read-only memory (ROM), a random-access memory (RAM), a flash memory, a memory card, a storage medium, and/or other storage unit. Memory 230/280 may comprise one or more non-transi tory computer readable mediums. Memory 230/280 may store computer program instructions or code that may be executed by processor 220/270 to carry out one or more of the operations/embodiments discussed in the present application. Memory 230/280 may be implemented (or positioned) within processor 220/270 or external to processor 220/270. Memory 230/280 may be operatively connected to processor 220/270 via various means known in the art.
  • FIG. 3 illustrates an example 300 of non-High Throughput (non-HT) PPDU 310, a High Throughput (HT) mixed mode PPDU 320, and a Very High Throughput (VHT) PPDU 330.
  • non-HT non-High Throughput
  • HT High Throughput
  • VHT Very High Throughput
  • Non-HT PPDU 310 may be used by STAs conforming to the IEEE 802.11a standard amendment. As shown in FIG. 3, non-HT PPDU 310 includes a non-HT Short Training field (L-STF), a non-HT Long Training field (L-LTF), a non- HT Signal field (L-SIG), and a Data field.
  • L-STF non-HT Short Training field
  • L-LTF non-HT Long Training field
  • L-SIG non-HT Signal field
  • Data field The L-STF, L-LTF, and L-SIG form a 20 pis preamble of non-HT PPDU 310.
  • the L-STF may be used by a receiver of non-HT PPDU 310 to synchronize with the carrier frequency and frame timing of a transmitter of non-HT PPDU 310 and to adjust the receiver signal gain.
  • the L-LTF may be used by the receiver of non-HT PPDU 310 to estimate channel coefficients in order to equalize the channel response (e.g., amplitude and phase distortion) in both the L-SIG and the Data fields of non-HT PPDU 310.
  • HT mixed mode PPDUs two bandwidths, 20 MHz and 140 MHz, may be supported.
  • the PPDU bandwidth is 20MHz, the band is divided into 64 subcarriers.
  • the PPDU bandwidth is 140 MHz, the band is divided into 128 subcarriers. In both cases, subcarrier spacing of 312.5 kHz is maintained.
  • VHT PPDU 330 includes an L-STF, an L-LTF, an L-SIG, a VHT Signal A field (VHT-SIG- A), a VHT Short Training field (VHT-STF), one or more VHT Long Training field (VHT-LTF), a VHT Signal B field (VHT- SIG-B), and a Data field.
  • the VHT-LTF and Data fields of VHT PPDU 330 include one or more symbols each having a duration of 3.6 ps or 4 ps. In both cases, 3.2 ps carry symbol information while the remaining 0.4 ps or 0.8 ps carry of the Gl. The 0.4 ps long Gl is called the Short Gl while the 0.8ps long is called regular or normal Gl.
  • VHT PPDUs For VHT PPDUs, four bandwidths, 20 MHz, 40 MHz, 80 MHz, and 160 MHz, may be supported.
  • the PPDU bandwidth is 20MHz, the band is divided into 64 subcarriers.
  • the PPDU bandwidth is 40 MHz, the band is divided into 128 subcarriers.
  • the PPDU bandwidth is 80MHz, the band is divided into 256 subcarriers.
  • the PPDU bandwidth is 160 MHz, the band is divided into two 256-subcarrier 80 MHz bands. In all cases, a subcarrier spacing of 312.5 kHz is maintained.
  • HE MU PPDU 420 includes an L-STF, an L-LTF, an L-SIG, an RL-SIG, an HE-SIG-A, an HE Signal B Field (HE-SIG-B), an HE-STF field, one or more HE-LTF field, a Data field, and a PE field. It is noted that compared to HE SU PPDU 410, HE MU PPDU 420 further includes HE-SIG-B. HE-SIG-B contains indications per STA of RU allocations. A STA may use the indications in HE-SIG-B to locate its payload in HE MU PPDU 420.
  • the Gl portion of the HE-LTF and Data field may be one of one of 0.8 ps, 1.6 ps, and 3.2 ps.
  • An AP or STA may use a suitable Gl duration depending on the channel conditions or capability of the target STA or AP.
  • the information portion of the HE-LTF may be one of 3.2 ps, 6.4 ps, or 12.8 ps.
  • a subcarrier spacing of the HE-LTF may be one of: 312.5kHz if the information potion is 3.2 ps, 156.25kHz if the information portion is 6.4 ps, and 78.125kHz if the information portion is 12.8 ps.
  • the information portion of the Data field for both HE SU PPDU 410 and HE MU PPDU 420 is always 12.8 ps.
  • HE ER SU PPDU 430 includes an L-STF, an L-LTF, an L-SIG, an RL-SIG, an HE-SIG-A, an HE-STF, one or more HE-LTF, a Data field, and a PE field. It is noted that compared to HE SU PPDU 410, HE ERSU PPDU 430 has an HE-SIG-A that is duplicated in the time domain (16 pis long instead of 8 ps long in HE SU PPDU 410).
  • EHT MU PPDU 510 includes an L-STF, an L-LTF, an L-SIG, an RL-SIG, a Universal Signal field (U-SIG), an EHT Signal field (EHT-SIG), an EHT Short Training Field (EHT-STF), one or more EHT Long Training fields (EHT-LTF), a Data field, and a PE field. It is noted that according to the IEEE 802.11 be standard amendment, EHT MU PPDU 510 may be used by a transmitting STA for both SU and MU transmissions.
  • the EHT-SIG contains indications per STA of resource unit (RU) allocations.
  • a STA may use the indications in the EHT-SIG to locate its payload in EHT MU PPDU 510.
  • a subcarrier spacing of the EHT-LTF may be one of: 312.5kHz if the information potion is 3.2 ps, 156.25kHz if the information portion is 6.4 ps, or 78.125kHz if the information portion is 12.8 ps.
  • the information portion of the Data field of EHT MU PPDU 510 is always 12.8 ps.
  • a subcarrier spacing of the Data field is always 78.125kHz corresponding to the duration of the information portion being 12.8 ps.
  • FIG. 6 illustrates examples of TB PPDUs which may be used by a STA for UL OFDMA (e.g., as in example 400) or UL MU MIMO (e.g., as in example 500).
  • HE TB PPDU 610 maybe used by a STA conforming to the IEEE 802.11ax standard amendment.
  • HE TB PPDU 610 shares the high spectral efficiency of HE SU PPDU 410 and HE MU PPDU 420 described with FIG. 4. As shown in FIG.
  • the Gl portion of the HE-LTF and Data field of HE TB PPDU 610 may be one of: 0.8 ps, 1.6 ps, or 3.2 ps.
  • An AP or a STA may use a suitable Gl duration depending on the channel conditions or capability of the target STA or AP.
  • the information portion of the Data field of HE TB PPDU 610 is always 12.8 ps.
  • a subcarrier spacing of the Data field is always 78.125kHz corresponding to the duration of the information portion being 12.8 ps.
  • the Gl portion of the Data field EHT TB PPDU 620 can be one of: 0.8 ps, 1 6 ps, or 3.2 ps.
  • the non-GI portion of the Data Field which has a fixed duration of 12.8 ps, may have a duration of 13.6 ps, 14.4 ps, or 16 ps.
  • An AP or STA may use a suitable Gl depending on the channel conditions or capability of the target STA or AP.
  • the subcarrier spacing at the Data field is equal to 78.125 kHz regardless of PPDU bandwidth.
  • HE-LTFs in HE PPDUs such as HE SU PPDU 410, HE MU PPDU 420, HE ER SU PPDU 430, and HE TB PPDU 610 may be transmitted using a subcarrier spacing of 312.5kHz (information duration of 3.2 ps) or a subcarrier spacing of156.25 kHz (information duration of 6.4 ps), instead of a subcarrier spacing of 78.125kHz (information duration of 12.8 ps).
  • trigger frame 700 includes a Frame Control field, a Duration field, a receiver address (RA) field, a transmitter address (TA) field, a Common Info field, a User List Info field, a Padding field, and an FCS field.
  • RA receiver address
  • TA transmitter address
  • FCS FCS field
  • the Duration field indicates various contents depending on frame type and subtype and the QoS capabilities of the sending STA. For example, in control frames of the power save poll (PS-Poll) subtype, the Duration field carries an association identifier (AID) of the STA that transmitted the frame in the 16 least significant bits (LSB), and the 2 most significant bits (MSB) are both set to 1 . In other frames sent by STAs, the Duration field contains a duration value (in microseconds) which is used by a recipient to update a network allocation vector (NAV).
  • NAV network allocation vector
  • the RA field is the address of the STA that is intended to receive the incoming transmission from the transmitting station.
  • the TA field is the address of the STA transmitting trigger frame 700 if trigger frame 700 is addressed to STAs that belong to a single BSS.
  • the TA field is the transmitted BSSID if the trigger frame 700 is addressed to STAs from at least two different BSSs of the multiple BSSID set.
  • the preferred AC sets the minimum priority AC traffic that can be sent by a participating STA
  • the AP determines the list of participating STAs, along with the BW, MCS, RU allocation, SS allocation, Tx power, preferred AC, and maximum duration of the TB PPDU per participating STA.
  • the Padding field is optionally present in trigger frame 700 to extend the frame length to give recipient STAs enough time to prepare a response for transmission one SIPS (short interframe spacing) after the frame is received.
  • the Padding field if present, is at least two octets in length and is set to all 1s.
  • FIG. 8 illustrates an example Common Info field 800.
  • Common Info field 800 may be an embodiment of the Common Info field of trigger frame 700 or an MU-RTS trigger frame, for example.
  • Common Info field 800 may include a Trigger Type subfield, a UL Length subfield, a More TF subfield, a CS required subfield, a UL BW subfield, a Gl and HE/EHT-LTF Type/Triggered TXS Mode subfield, a first Reserved subfield, a Number of HE/EHT-LTF Symbols subfield, a second Reserved subfield, an LDPC Extra Symbol Segment subfield, an AP Tx Power subfield, a Pre-FEC Padding Factor subfield, a PE Disambiguity subfield, an UL Spatial Reuse subfield, a third Reserved subfield, an HE/EHT P160 subfield, a Special User Info Field Flag subfield, an EHT Reserved subfield, a fourth Reserved
  • FIG. 9 illustrates an example management frame 900 which may be used as an action frame.
  • management frame 900 includes a MAC header, a variable length frame body, and a frame check sequence (FCS).
  • the MAC header includes a frame control field, a duration field, an address 1 field, an address 2 field, an address 3 field, a sequence control field, and an optional HT control field.
  • the presence of the HT control field is determined by the setting of a +HTC subfield of the frame control field.
  • the frame body of management frame when used as an action frame, includes an action field, vendor specific elements, management message integrity code element (MME), message integrity code (MIC), and an authenticated mesh peering exchange element.
  • MME management message integrity code element
  • MIC message integrity code
  • the action field includes a category field and an action details field.
  • the action field provides a mechanism for specifying extended management actions.
  • the category field indicates a category of the action frame.
  • the action details field contains the details of the action requested by the action frame.
  • the MME is present when management frame protection is negotiated, the frame is a group addressed robust Action frame, and (MBSS only) the category of the action frame does not support group addressed privacy as indicated by category values; otherwise not present.
  • the authenticated mesh peering exchange element is present in a self-protected action frame if a shared PMK exists between the sender and recipient of this frame; otherwise not present.
  • FIG. 10 is an example 1000 that illustrates an example of using a TB PPDU.
  • example 1000 includes an AP 1041 and a plurality of STAs 1052-1 to 1052-8.
  • STAs 1052-1 to 1052-8 may respond simultaneously to HE MU PPDU 1010 by each transmitting an MU MIMO TB PPDU 1020.
  • MU MIMO TB PPDU 1020 may have an 80 MHz bandwidth.
  • a STA 1052-1 to 1052-8 may duplicate four times over frequency each of fields L-STF, L-LTF, L-SIG, RL-SIG, U-SIG, and EHT- STF to fill out the 80 MHz bandwidth.
  • EHT-LTFs 1040-1 to 1040-8 and a data field 1050 of PPDU 1020 may fill out the entire 80 MHz bandwidth and are not duplicated over frequency.
  • the number of EHT-LTFs transmitted by the STA is based on the number of users accessing the channel using MU MIMO TB PPDU 1020.
  • MU MIMO TB PPDU 1020 includes eight EHT-LTFs 1040-1 to 1040-8.
  • EHT-LTFs 1040-1 to 1040-8 of MU MIMO TB PPDU 1020 use the same subcarrier spacing (78.125 kHz) as data field 1050 of TB PPDU 1020.
  • each EHT-LTF 1040-1 to 1040-8 has a 16 pis duration.
  • the total access latency of a STA 1052-1 to 1052-8 is equal to the combined duration of an HE MU PPDU (e.g. , HE MU PPDU 1010), a SIFS duration, and a TB PPDU (e.g., 1020).
  • the HE MU PPDU may be replaced with a single spatial stream EHT MU PPDU in order to avoid a long string of EHT- LTFs in the time domain.
  • MU-MIMO TB PPDU 1020 which is a multiple spatial stream PPDU.
  • FIG. 11 illustrates an example 1100 of a multi-user (MU) beamforming procedure.
  • An MU beamforming transmission procedure allows an AP to transmit a frame to multiple STAs using the same time and frequency resources by applying a set of beamforming weights to cancel inter-user interference to each STA.
  • example 1100 includes an AP 1102 and STAs 1104, 1106, and 1108.
  • STAs 1104, 1106, and 1108 may be associated with AP 1102.
  • the MU beamforming procedure may include a sounding phase/procedure, which AP 1102 may use to acquire channel state information from STAs 1104, 1106, and 1108.
  • the sounding phase/procedure may begin with AP 1102 transmitting a null data packet announcement (NDPA) frame 1110 to STAs 1104, 1106, and 1108.
  • NDPA frame 1110 announces to STAs 1104, 1106, and 1108 the transmission of one or more sounding frames by AP 1102.
  • FIG. 12 illustrates an example 1200 of an uplink beamforming procedure.
  • example 1200 includes AP 1202 and STAs 1204, 1206, and 1208.
  • STAs 1204, 1206, and 1208 maybe associated with AP 1202.
  • the uplink beamforming procedure of example 1200 may begin with AP 1202 transmitting a beamforming sounding NDP poll (BSNP) trigger frame 1205 for requesting a sounding NDP from STAs 1204, 1206, and 1208 to obtain uplink channel state information for the respective STAs.
  • BSNP beamforming sounding NDP poll
  • STAs 1204, 1206, and 1208 respectively provide sounding NDPs 1260A-C to AP 1202.
  • AP 1202 estimates an uplink channel state information and may generate respective compressed matrix V from the uplink channel state information for STAs 1204, 1206, and 1208.
  • AP 1202 may send channel state information directly to STAs 1204, 1206, and 1208 without generating respective matrix V from the channel state information.
  • STAs 1204, 1206, and 1208 may directly generate steering matrices from the channel state information without a decompression procedure.
  • AP 1202 may add padding 1230 to allow the generation of the steering matrices to be completed. Based on trigger frame 1210, respective STAs 1204, 1206, and 1208 transmit data frames 1250A-C, based on the respectively generated steering matrices. In response, AP 1202 transmits BA 1240.
  • FIG. 13 illustrates an example 1300 of an uplink beamforming procedure.
  • example 1300 includes AP 1302 and STAs 1304, 1306, and 1308.
  • STAs 1304, 1306, and 1308 maybe associated with AP 1302.
  • the uplink beamforming procedure of example 1300 may begin with AP 1302 transmitting a beamforming sounding NDP poll (BSNP) trigger frame 1305 for requesting a sounding NDP from STAs 1304, 1306, and 1308 to obtain uplink channel state information for the respective STAs.
  • BSNP beamforming sounding NDP poll
  • STAs 1304, 1306, and 1308 respectively provide sounding NDPs 1360A-C to AP 1302.
  • AP 1302 estimates an uplink channel state information and, instead of generating respective compressed matrix V (e.g., for providing feedback to STAs 1304, 1306, and 1308 for the STAs to generate respective beam steering matrices as in FIG.
  • AP 1302 may directly generate respective beam steering matrices for STAs 1304, 1306, and 1308, based on the uplink channel state information. Based on the steering matrices, AP 1302 generates respective Beamforming Reports (BFRs) 1330A-C for STAs 1304, 1306, and 1308. AP 1302 may perform compression of respective steering matrices, before transmitting to STAs 1304, 1306, and 1308 in BFRs 1330A-C.
  • BFRs Beamforming Reports
  • AP 1302 transmits trigger frame 1310 with BFRs 1330A-C included in feedback frame 1320. Similar to example 1000, data frames 1350A-C may be included in respective TB PPDUs, with each TB PPDU being transmitted in response to trigger frame 1310.
  • feedback frame 1320 may be characterized as an uplink beamforming compressed beamforming frame (ULBF CBF).
  • Triggerframe 1310 and feedback frame 1320 may be provided by independent PPDUs sent after SIPS of each other or through one PPDU, e.g., an aggregated message access control protocol data unit (A-MPDU), as in PPDU 1010 in example 1000.
  • A-MPDU aggregated message access control protocol data unit
  • FIG. 14 illustrates an example 1400 that highlights a problem that may arise in association with an uplink beamforming procedure.
  • example 1400 includes AP 1402 and STAs 1404 and 1406. STAs 1404 and 1406 may be associated with AP 1402.
  • the uplink beamforming procedure of example 1400 may begin with AP 1402 transmitting frame 1470A to STA 1404.
  • Frame 1470A may include a trigger frame that schedules and allocates resources to receive uplink data from STA 1404.
  • Frame 1470A may further include precoding information 1490A for STA 1404.
  • STA 1404 may use precoding information 1490A to perform a beamformed transmission of a data frame 1480A to AP 1402.
  • precoding information e.g., precoding information 1490A
  • precoding information 1490A may include information that facilitates uplink beamforming transmission by non-AP STAs, including, but not limited to, beamforming reports (BFRs), sounding information, channel state information feedback, channel feedback, steering matrices, and/or other similar information.
  • BFRs beamforming reports
  • AP 1402 may transmit a frame 1470B to STA 1404 and STA 1406.
  • Frame 1470B may include a trigger frame that schedules and allocates resources to receive uplink data from STA 1404 and STA 1406.
  • Frame 1470B may further include precoding information 1490C for STA 1404 and precoding information 1490B for STA 1406.
  • STA 1404 may use precoding information 1490C to perform a beamformed uplink transmission of a data frame 1480B to AP 1402
  • STA 1406 may use precoding information 1490B to perform a beamformed transmission of a data frame 1480D to AP 1402.
  • AP 1402 may trigger STAs 1404 and 1406 to transmit data frames 1480B and 1480D respectively, using the same time and frequency resources.
  • precoding information 1490C for STA 1404 and precoding information 1490B for STA 1406 may be tailored to enable overlapping uplink beamforming transmissions from STAs 1404 and 1406.
  • Precoding information 1490C may thus be different than precoding information 1490A provided in frame 1470A to enable the beamformed transmission of data frame 1470A to AP 1402.
  • This retransmission of precoding information 1490A may be an inefficient and wasteful use of network resources, including wireless channel resources required to resend precoding information 1490A, processing and power resources of AP 1402 to process and retransmit precoding information 1490A, and the processing and power resources of STA 1404 to receive and process precoding information 1490A. This is especially the case if AP 1402 retransmits precoding information 1490A when precoding information 1490A has not been overwritten by STA 1404 (e.g. STA 1404 has enough memory capacity when frame 1470B was received or when STA 1404 memory management algorithm determined not to overwrite precoding information 1490A).
  • the second STA may avoid unnecessarily wasting resources of the first STA (e.g., a non-AP STA), second STA, and the communication channel, by retransmitting the first precoding information to the first STA.
  • FIG. 15 illustrates an example 1500 of an uplink beamforming procedure according to an embodiment.
  • example 1500 includes AP 1502 and STAs 1504 and 1506.
  • STAs 1504 and 1506 maybe associated with AP 1502.
  • the uplink beamforming procedure may begin with AP 1502 transmitting a frame 1570A to STA 1504.
  • Frame 1570A may comprise first precoding information for use by STA 1504 to transmit a frame 1580A to AP 1502.
  • frame 1570A includes precoding information 1590A (e.g., first precoding information) for use by STA 1504 to transmit frame 1580A to AP 1502.
  • frames 1570A-C may broadly include one or more of a data frame, a management frame (e.g., discussed with FIG. 9 above), and/or a control frame (e.g., discussed with FIG. 7 above).
  • precoding information 1590A may include steering matrices (e.g., per tone or per group of tones) that STA 1504 may apply to transmit frame 1580A, e.g., similar to an approach described above with FIG. 13 in relation to the generation of precoding information 1330A-1330B.
  • Precoding information 1590A may include beamforming matrix V (e.g., per tone or group of tones) for the MIMO channel between AP 1502 and STA 1504, e.g., similar to an approach described above with FIG. 12 in relation to the generation of precoding information 1230A-1230B.
  • Precoding information 1590A may include channel state information comprising coefficient estimates (e.g., per tone or group of tones) for the MIMO channel between AP 1502 and STA 1504, e.g., similar to the alternative approach described above with FIG. 12 in relation to the generation of precoding information 1230A-1230B, without generating respective matrix V from channel state information.
  • coefficient estimates e.g., per tone or group of tones
  • Steering matrices may be determined by STA 1504 using the beamforming matrix V before transmitting frame 1580A.
  • STA 1504 may determine steering matrices using the channel state information before transmitting frame 1580A.
  • Padding may be added to frame 1570A in order to give STA 1504 time to finish determining the steering matrices from the channel state information. Padding for frame 1570A may be selected, for example, in accordance to padding 1230 in described above with FIG. 12.
  • STA 1504 may use precoding information 1590A of frame 1570A to perform a beamforming transmission of frame 1580A to AP 1502.
  • Frame 1570A may comprise a trigger frame that schedules and allocates resources of AP 1502 to receive beamformed uplink data (e.g., frame 1580A) from STA 1504.
  • precoding information 1590A may be included in different ways within frame 1570A, e.g., in a common info field of the trigger frame, and/or a user info field of the trigger frame.
  • FIG. 7 describes how user info fields and common info fields may be integrated into a trigger frame. Additionally, in FIG. 8 above, reserved and common info fields are further discussed as potentially signaling indexing and precoding information discussed herein.
  • precoding information 1590A may be stored in a memory of STA 1504 for reuse with the beamformed uplink channel in accordance with precoding information 1590A.
  • frame 1570A may further include a first index 1572A associated with the storage of precoding information 1590A.
  • the presence of the first index 1572A in frame 1570A may be used by STA 1504 as an indication from AP 1502 that precoding information 1590A may be reused in a subsequent beamformed transmission.
  • first index 1572A may reference a first storage location within the memory for storage of channel feedback from AP 1502.
  • first index 1572A may be included within frame 1570A in different ways, e.g., in the common info field of the trigger frame, the user info field of the trigger frame, and/or a UHR MIMO control field of the trigger frame.
  • AP 1502 may trigger STAs 1504 and 1506 to transmit frames 1580B and 1580D respectively, using the same time and frequency resources.
  • precoding information 1590B for STA 1504 and precoding information 1590C for STA 1506 may be tailored to enable overlapping uplink beamforming transmissions from STAs 1504 and 1506.
  • Precoding information 1590B for STA 1504 may thus be different than precoding information 1590A provided for STA 1504 in frame 1570A to enable the beamformed transmission of data frame 1570A to AP 1502.
  • precoding information 1590A is not necessarily overwritten by precoding information 1590B.
  • precoding information 1590A is not overwritten based on second index 1572B referencing a second memory location in the memory of STA 1504.
  • precoding information 1590B may be stored in the second memory location, and precoding information 1590A may remain stored in the first memory location.
  • AP 1502 may explicitly use the same memory location of previously stored precoding information (e g., the first memory location of STA 1504) to store new precoding information. For example, for precoding information 1590B, instead of second index 1572B referencing the second memory location of STA 1504, AP 1502 may include an index reference to the first memory location of STA 1504 (not shown). AP 1502 may determine to overwrite the first memory location of STA 1504 based on a determination that precoding information 1590A is not subject to a scheduled transmission.
  • AP 1502 may transmit a frame 1570C to STA 1504.
  • Frame 1570C may include a trigger frame that schedules and allocates resources of AP 1502 to receive beamformed uplink data, e.g., frame 1580C from STA 1504.
  • Frame 1570C includes a reference to first index 1572A and no channel feedback data for use by STA 1504 to transmit frame 1580C to AP 1502.
  • precoding information 1590A may remain stored in the memory of STA 1504.
  • Precoding information 1590A may be specified by AP 1502 to be used to transmit frame 1580C, by inclusion of first index 1572A referencing stored precoding information 1590A in the first memory location of STA 1504.
  • precoding information 1590C may be stored in memory of STA 1506 based on first index 1572C.
  • first index 1572C may refer to a first memory location in the memory of STA 1506.
  • FIG. 16 illustrates an example 1600 of an uplink beamforming procedure according to an embodiment. As shown in FIG. 16, example 1600 includes an AP 1602 and STAs 1604 and 1606. STAs 1604 and 1606 maybe associated with AP 1602.
  • the uplink beamforming procedure may begin with AP 1602 transmitting a frame 1670A to STA 1604.
  • Frame 1670A may comprise first precoding information for use by STA 1604 to transmit a frame 1680A to AP 1602.
  • frame 1670A includes precoding information 1690A (e.g., the first precoding information) for use by STA 1604 to transmit frame 1680A to AP 1602.
  • Frame 1670A may further include a request to store 1675 associated with the first precoding information.
  • request to store 1675 may be included with precoding information as an indication that the precoding information is to be stored at the STA for reuse. Use of a request to store indication (e.g.
  • including request to store 1675 in frame 1670A by AP 1602 may be achieved by setting a flag in frame 1670A, e.g., setting (e.g., to 1) a reserved bit in the common info field or user info field of frame 1670A, as a trigger frame.
  • a flag in frame 1670A e.g., setting (e.g., to 1) a reserved bit in the common info field or user info field of frame 1670A, as a trigger frame.
  • not including request to store 1675 in frame 1670A may be achieved by AP 1602 by setting the flag in frame 1670A, e.g., setting (e.g., to 0) the reserved bit in the common info field or user info field of frame 1670A, as a trigger frame
  • AP 1602 may transmit frame 1670B to STA 1604 and STA 1606.
  • Frame 1670B includes precoding information 1690B associated with the beamformed uplink channel from STA 1604 to AP 1602, and precoding information 1690C associated with a beamformed uplink channel from STA 1606 to AP 1602.
  • STA 1604 may use precoding information 1690B of frame 1670B to perform a beamformed uplink transmission of frame 1680B to AP 1602, and STA 1606 may use precoding information 1690C of frame 1670B to perform a beamforming transmission of frame 1680D to AP 1602.
  • precoding information 1690B is not stored in the memory of STA 1604.
  • precoding information 1690A is not overwritten by precoding information 1690B.
  • AP 1602 may transmit frame 1670C to STA 1604.
  • Frame 1670C does not include indexes referencing the storage of precoding information discussed with FIG. 15 above.
  • precoding information 1690A was not overwritten by precoding information 1690B.
  • precoding information 1690A remains stored for reuse in the memory of STA 1604.
  • the uplink beamforming procedure may begin with AP 1702 transmitting a frame 1770A to STA 1704.
  • Frame 1770A may comprise first precoding information for use by STA 1704 to transmit a frame 1780A to AP 1702.
  • frame 1770A includes precoding information 1790A (e.g., the first precoding information) for use by STA 1704 to transmit frame 1780A to AP 1702.
  • precoding information 1790A e.g., the first precoding information
  • frame 1770A may further include a request to store 1775A associated with precoding information 1790A.
  • Request to store 1775A may be included with precoding information as an indication that the precoding information is to be stored at the STA for reuse.
  • STA 1704 may store precoding information 1790A in memory of STA 1704 for reuse with the beamformed uplink channel in accordance with precoding information 1790A.
  • including request to store 1775A in frame 1770A by AP 1702 may be achieved by setting a flag in frame 1770A (e.g. a reserved bit in the common info field or user info field if frame 1770A is a trigger frame) to one value (e.g. 1).
  • not including request to store 1775A in frame 1770A maybe achieved by the AP 1702, by setting the flag in frame 1770A (e.g. the reserved bit in the common info field or user info field if frame 1770A is a trigger frame) to another value (e.g. 0).
  • AP 1702 may transmit a frame 1770B to STA 1704.
  • Frame 1770B may comprise first precoding information for use by STA 1704 to transmit a frame 1780B to AP 1702.
  • frame 1770B includes precoding information 1790B (e.g., the first precoding information) for use by STA 1704 to transmit frame 1780B to AP 1702.
  • Frame 1770B may further include a request to store 1775B associated with precoding information 1790B.
  • request to store 1775B may be included with precoding information as an indication that precoding information 1790B is to be stored at STA 1704 for reuse.
  • precoding information 1790B is stored for reuse in the memory of STA 1704. This storage of precoding information 1790B may overwrite the storage of precoding information 1790A in the memory of STA 1704.
  • AP 1702 may transmit frame 1770C to STA 1704. Frame 1770C does not include indexes referencing the storage of precoding information discussed with FIG. 15 above.
  • precoding information 1790A was overwritten by precoding information 1790B.
  • precoding information 1790B may be used at STA 1704 to perform a beamformed uplink transmission of frame 1780C to AP 1702.
  • precoding information 1790B may be selected to remain stored in the memory of STA 1704 thereby avoiding the problem described with FIG. 14 above.
  • FIG. 18 illustrates an example process 1800 according to an embodiment.
  • Example process 1800 is provided for the purpose of illustration only and is not limiting of embodiments.
  • Example process 1800 may be performed by a first STA, such as non-AP STAs STA 1504, STA 1506, STA 1604, STA 1606, and/or STA 1704, for example.
  • process 1800 may include steps 1802 and 1804
  • Step 1802 includes receiving, by a first STA from a second STA, a first frame that may comprise first precoding information for use by the first STA to transmit a second frame to the second STA, and a first index associated with the first precoding information.
  • the first STA may be a non-AP STA and the second STA may be an AP STA.
  • the presence of the first index in the first frame may be used by the first STA as an indication from the second STA that precoding information may be reused in a subsequent beamformed transmission.
  • the first frame may include a data frame, a management frame, and/or a control frame.
  • the second frame may include a data frame, a management frame, and/or a control frame.
  • first precoding information may include information that facilitates uplink beamforming transmission by non-AP STAs, including, but not limited to, beam forming reports (BFRs), sounding information, channel state information feedback, channel feedback, steering matrices, and/or other similar information.
  • the first precoding information may comprise a set of steering matrices for an ultra-high reliability (UHR) modulated field of a physical layer protocol data unit (PPDU) carrying the second frame.
  • the first precoding information may comprise a set of UHR beamforming matrices V used to determine a set of steering matrices for an ultra-high reliability (UHR) modulated field of a physical layer protocol data unit (PPDU) carrying the second frame.
  • the first precoding information may further comprise a set of uplink channel state information used to determine a set of steering matrices for an ultra-high reliability (UHR) modulated field of a PPDU carrying the second frame.
  • UHR ultra-high reliability
  • padding may be added to the first frame in order to give the first STA time to finish determining the steering matrices from the uplink channel state information.
  • padding may be added to the first frame in order to give the first STA time to finish determining the steering matrices from the set of UHR beamforming matrices V.
  • the first frame may comprise an action frame.
  • the first precoding information may be comprised in an ultra-high reliability (U H R) steering matrix field of the action frame.
  • the first index may be comprised in a UHR M I MO control field of the action frame.
  • the first index associated with the first precoding information may comprise an indication of whether or not at least one frame transmitted using the first precoding information will be solicited by the second STA after the first STA transmits the second frame.
  • the first frame further comprises a modulation and coding rate feedback (MFB) associated with the first precoding information.
  • MFB modulation and coding rate feedback
  • the MFB may be used by the STA to transmit the second frame.
  • the MFB may comprise unequal modulation for at least two spatial streams of a PPDU carrying the second frame.
  • Step 1804 includes, in response to a third frame that may comprise the first index, transmitting, by the first STA to the second STA and using the first precoding information, a fourth frame.
  • Step 1804 may include receiving, by the first STA from the second STA, the third frame that may comprise the first index.
  • the third frame may comprise a trigger frame and/or an action frame similar to the first frame describe above, that triggers a beamforming transmission by the first STA of the fourth frame based on the first precoding information.
  • the fourth frame may include a data frame, a management frame, and/or a control frame.
  • process 1800 may further comprise, transmitting, by the first STA to the second STA and in response to the first frame, the second frame using first precoding information.
  • the first index associated with the first precoding information comprises an indication whether or not at least one frame transmitted using the first precoding information will be solicited by the second STA after the first STA transmits the second frame.
  • process 1800 may further comprise, before receiving the third frame, the first STA receives from the second STA, a fifth frame comprising second precoding information for use by the first STA to transmit a sixth frame to the second STA, and a second index associated with the second precoding information.
  • the first STA based on the first index being different from the second index, stores the first precoding information and the second precoding information for reuse by the first STA.
  • the first index comprises a first indication specifying that the first precoding information be stored for reuse by the first STA.
  • the second precoding information is not stored for reuse by the first STA.
  • FIG. 19 illustrates an example process 1900 according to an embodiment.
  • Example process 1900 is provided for the purpose of illustration only and is not limiting of embodiments.
  • Example process 1900 may be performed by AP STAs such as AP 1502, AP 1602, and/or AP 1702, for example As shown in FIG. 19, process 1900 may include steps 1902 and 1904.
  • Step 1902 includes transmitting, by a second STA to a first STA, a first frame that may comprise first precoding information for use by the first STA to transmit a second frame to the second STA, and a first index associated with the first precoding information.
  • the first frame may comprise a trigger frame that triggers the transmitting of the second frame, wherein the second frame is transmitted using the first precoding information.
  • the second frame may include a data frame, a management frame, or a control frame.
  • the presence of the first index in the first frame may be used by the first STA as an indication from the second STA that precoding information may be reused in a subsequent beamformed transmission.
  • Step 1904 includes, based on a third frame and the first precoding information, receiving, by the second STA from the first STA, a fourth frame.
  • Step 1904 may further include transmitting, by the second STA to the first STA, the third frame that includes the first index.
  • the third frame may comprise a trigger frame that triggers the transmitting of the fourth frame based on the first precoding information.
  • the fourth frame may include a data frame, a management frame, or a control frame.
  • process 1900 may further comprise, transmitting, by the second STA to the first STA, a fifth frame comprising, second precoding information for use by the first STA to transmit a sixth frame to the second STA, and a second index associated with the second precoding information.
  • process 1900 may further comprise, based on a fifth frame and the second precoding information, receiving, by the second STA from the first STA, the sixth frame.
  • the fifth frame may comprise a trigger frame that triggers the transmitting of the sixth frame based on the first precoding information.
  • the sixth frame may include a PPDU or other similar data frame.
  • first precoding information may include information that facilitates uplink beamforming transmission by non-AP STAs, including, but not limited to, BFRs, sounding information, channel state information feedback, channel feedback, steering matrices, and/or other similar information.
  • the first precoding information may comprise a set of steering matrices for an ultra-high reliability (UHR) modulated field of a physical layer protocol data unit (PPDU) carrying the second frame.
  • the first precoding information may comprise a set of UHR beamforming matrix V used to determine a set of steering matrices for an ultra-high reliability (UHR) modulated field of a physical layer protocol data unit (PPDU) carrying the second frame.
  • the first precoding information may comprise a set of uplink channel state information used to determine a set of steering matrices for an ultra-high reliability (UHR) modulated field of a PPDU carrying the second frame.
  • UHR ultra-high reliability
  • padding may be added to the first frame in order to give the first STA time to finish determining the steering matrices from the uplink channel state information.
  • padding may be added to the first frame in order to give the first STA time to finish determining the steering matrices from the set of UHR beamforming matrices V.
  • the first frame may comprise a trigger frame.
  • the first precoding information may be comprised in a field of the trigger frame.
  • the first precoding information may be comprised in a common info field of the trigger frame.
  • the first precoding information may be comprised in a user info field of the trigger frame.
  • the first index may be comprised in a common info field of the trigger frame.
  • the first index may be comprised in a user info field of the trigger frame.
  • the first frame further comprises a modulation and coding rate feedback (MFB) associated with the first precoding information.
  • MFB modulation and coding rate feedback
  • the MFB may be used by the first STA to transmit the second frame.
  • the MFB may comprise unequal modulation for at least two spatial streams of a PPDU carrying the second frame.
  • process 1900 may further comprise transmitting, by the second STA from the first STA, a seventh frame comprising a third precoding information for use by the first STA to transmit the second frame to the second STA, and a second index associated with the third precoding information.
  • process 1900 may further comprise receiving, by the second STA from the first STA, the second frame, wherein the first index comprises the second index, and wherein the second frame is transmitted using the first precoding information.

Landscapes

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

Abstract

L'invention concerne une première station (STA) qui reçoit, en provenance d'un point d'accès (AP), une première trame de déclenchement. La première trame de déclenchement comprend : des informations de précodage destinées à être utilisées par la première STA pour transmettre une première trame à l'AP, et une valeur d'indice associée aux informations de précodage. En réponse à la première trame de déclenchement, la première STA transmet, à l'AP, la première trame au moyen des informations de précodage. La première STA reçoit, en provenance de l'AP, une seconde trame de déclenchement comprenant la valeur d'indice. En réponse à la seconde trame de déclenchement, la première STA transmet, à une seconde STA et au moyen des informations de précodage, une seconde trame.
PCT/US2025/021765 2024-03-29 2025-03-27 Informations de formation de faisceau réutilisables au niveau d'une station Pending WO2025207891A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202463571636P 2024-03-29 2024-03-29
US63/571,636 2024-03-29

Publications (1)

Publication Number Publication Date
WO2025207891A1 true WO2025207891A1 (fr) 2025-10-02

Family

ID=95446621

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2025/021765 Pending WO2025207891A1 (fr) 2024-03-29 2025-03-27 Informations de formation de faisceau réutilisables au niveau d'une station

Country Status (1)

Country Link
WO (1) WO2025207891A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021083476A1 (fr) * 2019-10-28 2021-05-06 Huawei Technologies Co., Ltd. Techniques de gestion de transmissions en liaison montante formées en faisceaux de dispositifs formateurs de faisceaux
WO2023024061A1 (fr) * 2021-08-27 2023-03-02 Qualcomm Incorporated Précodage de liaison montante sélectif en fréquence

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021083476A1 (fr) * 2019-10-28 2021-05-06 Huawei Technologies Co., Ltd. Techniques de gestion de transmissions en liaison montante formées en faisceaux de dispositifs formateurs de faisceaux
WO2023024061A1 (fr) * 2021-08-27 2023-03-02 Qualcomm Incorporated Précodage de liaison montante sélectif en fréquence

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SHIMI SHILO (HUAWEI): "UL Beamforming for TB PPDUs", vol. 802.11 EHT; 802.11be, no. 2, 24 February 2021 (2021-02-24), pages 1 - 20, XP068178848, Retrieved from the Internet <URL:https://mentor.ieee.org/802.11/dcn/20/11-20-1672-02-00be-ul-beamforming-for-tb-ppdus.pptx> [retrieved on 20210224] *

Similar Documents

Publication Publication Date Title
US12200706B2 (en) Method for feeding back channel state in wireless communication system and device therefor
CN107534472B (zh) 在无线通信系统中的信道探测方法及其装置
US10057806B2 (en) Multi-user communication in wireless networks
CN107771376B (zh) 无线通信系统中发送数据的方法及其设备
US11388725B2 (en) Method and device for transmitting PPDU on basis of FDR in wireless LAN system
US10469230B2 (en) Transmission/reception apparatus and method for wireless communication system
KR20220154684A (ko) Psd(power spectral density) 제한들을 위한 phy(physical layer) 패킷 설계
US20180263047A1 (en) Method and apparatus for transmitting data unit on basis of trigger frame
TW202318847A (zh) 分散式傳輸的全域循環移位延遲
US11784752B2 (en) Method and apparatus for transmitting PPDU in duplicate (DUP) mode in a wireless communication system
US20200396742A1 (en) Method and device for transmitting ppdu on basis of fdr in wireless lan system
US10320601B2 (en) Transmitting/receiving device and method in wireless communication system
KR20170048413A (ko) 무선 통신 시스템에서 데이터 전송 방법 및 이를 위한 장치
KR20140095059A (ko) 무선랜 시스템에서 프레임을 전송하는 방법 및 장치
KR20160098209A (ko) 무선랜에서 복수의 sta으로 데이터를 전송하는 방법 및 장치
US20250119893A1 (en) Spatial Mapping Coordination for Multi-Access Point Communication
TW202301825A (zh) 多使用者複製傳輸
US20240048304A1 (en) Ppdu with adjustable subcarrier spacing
WO2025207891A1 (fr) Informations de formation de faisceau réutilisables au niveau d&#39;une station
WO2023036050A1 (fr) Procédé de communication et appareil
WO2025217356A1 (fr) Persistance d&#39;informations de formation de faisceau au niveau d&#39;une station
WO2025245067A1 (fr) Procédure de sondage pour mode d&#39;économie d&#39;énergie
WO2025259834A1 (fr) Fonctionnement en mode d&#39;économie d&#39;énergie pour transmission de données à formation de faisceau
WO2025245192A1 (fr) Transmission sélective de tonalité par l&#39;intermédiaire d&#39;une unité de ressource
WO2025242471A1 (fr) Procédure de sondage à portée étendue

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 25719550

Country of ref document: EP

Kind code of ref document: A1