Patents by Inventor Xiaofei Wang
Xiaofei Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20250261233Abstract: Devices, methods and systems for parameterized spatial reuse (PSR). A parameterized spatial reuse reception (PSRR) Physical Layer protocol data unit (PPDU) which includes a trigger frame is received from an access point (AP). A PSR opportunity is identified, responsive the PSRR PPDU, and a PSR-based backoff procedure is started based on the PSR opportunity. A parameterized spatial reuse transmission (PSRT) PPDU is transmitted. Devices, methods and systems for enhanced spatial reuse (ESR). An enhanced spatial reuse reception (ESRR) physical protocol data unit PPDU is received, the ESRR PPDU including a trigger frame that indicates that at least one subchannel may be punctured, and a duration of an ESR operation. An enhanced spatial reuse transmission (ESRT) PPDU is transmitted on at least one punctured subchannel, on an ESR opportunity based on the ESRR PPDU. A response to the ESRT PPDU is received on the at least one punctured subchannel.Type: ApplicationFiled: April 7, 2023Publication date: August 14, 2025Applicant: INTERDIGITAL PATENT HOLDINGS, INC.Inventors: Hanqing Lou, Zinan Lin, Mahmoud Saad, Rui Yang, Xiaofei Wang
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Publication number: 20250247881Abstract: Enhanced protocols and devices may be used to alleviate loss of spectrum efficiency in wideband transmission. The protocols may implement a wideband transmission opportunity (TXOP) truncation where one or more of the channels involved in communication over the wideband are released. In one scenario, an access point (AP) may receive, from a wireless transmit receive unit (WTRU), a first CF-End frame that includes a duration field and a basic service set identifier (BSSID) field that includes an individual/group bit. On a condition that the individual/group bit of the BSSID field has a value of one (1), the AP may determine that a scrambling sequence of the first CF-End frame indicates a bandwidth associated with a transmit opportunity (TXOP) being truncated by the WTRU. The AP may then transmit a second CF-End frame at the bandwidth indicated by the scrambling sequence of the first CF-End frame.Type: ApplicationFiled: April 15, 2025Publication date: July 31, 2025Applicant: InterDigital Patent Holdings, Inc.Inventors: Bhaskar M. Anepu, Sudheer A. Grandhi, Xiaofei Wang
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Publication number: 20250240644Abstract: A method and apparatus may be used for WiFi sectorization medium access control enhancement (WISE MAC). An IEEE 802.11 STA may receive an omni-directional indication of a first sectorized transmission opportunity (TXOP) associated with a second STA. The omni-directional indication may include an identifier (ID) of a first sector associated with the first sectorized TXOP. The STA may transmit a directional indication of a second sectorized TXOP a condition that a second sector associated with the second sectorized TXOP does not interfere with the first sector associated with the first sectorized TXOP.Type: ApplicationFiled: April 7, 2025Publication date: July 24, 2025Applicant: InterDigital Patent Holdings, Inc.Inventors: Xiaofei Wang, Guodong Zhang
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Publication number: 20250233694Abstract: Methods and apparatuses are described herein for HARQ signaling and acknowledgement as well as HARQ MAC procedures in wireless networks.Type: ApplicationFiled: December 20, 2024Publication date: July 17, 2025Inventors: Xiaofei WANG, Oghenekome OTERI, Hanqing LOU, Li Hsiang SUN, Joseph LEVY, Alphan SAHIN, Frank LASITA
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Publication number: 20250227545Abstract: A method for receiving a backoff value at a wireless station is presented. A traffic indication map is received at the station, wherein a backoff number is implicitly assigned to the station based on a position of the station within the traffic indication map. The backoff value is determined by multiplying the backoff number by a predetermined time value.Type: ApplicationFiled: March 4, 2025Publication date: July 10, 2025Applicant: INTERDIGITAL PATENT HOLDINGS, INC.Inventors: Xiaofei Wang, Lei Wang, Sudheer A. Grandhi, Guodong Zhang
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Patent number: 12356338Abstract: Methods and apparatuses are described herein for adapting clear channel assessment (CCA) thresholds with or without Transmit Power Control (TPC) are disclosed. An IEEE 802.11 station (STA) may dynamically calculate a STA specific transmit power control (TPC) value and a STA specific clear channel assessment (CCA) value based on a target TPC parameter and a target CCA parameter. The target TPC parameter and the target CCA parameter may be received from an IEEE 802.11 cluster head configured to control TPC and CCA for a plurality of STAs associated with the BSS. The target TPC parameter and the target CCA parameter also may be related. The STA may then determine whether a carrier sense multiple access (CSMA) wireless medium of a wireless local area network (WLAN) basic service set (BSS) is occupied or idle based on the STA specific CCA value.Type: GrantFiled: April 27, 2023Date of Patent: July 8, 2025Assignee: InterDigital Patent Holdings, Inc.Inventors: Oghenekome Oteri, Pengfei Xia, Xiaofei Wang, Hanqing Lou, Monisha Ghosh, Robert Olesen, Nirav B Shah, Frank LaSita
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Patent number: 12356324Abstract: A method and apparatus for power savings in a wireless local area network (WLAN) are disclosed. A station (STA) may receive parameters that associate the STA to a specific group of STAs and perform a channel access during a period that is allowed for the group of STAs based on the parameters. The STA may receive information regarding an access slot that is allowed for the group of STAs and access a channel during the access slot. The STA may receive a schedule for wake up from a doze state and goes in and out of the doze state based on the schedule. A highest channel access priority may be provided to a sensor or meter type of STA. The STA may indicate to an access point (AP) that the STA will not listen to a traffic indication map (TIM) or a delivery TIM (DTIM) in a beacon.Type: GrantFiled: October 2, 2018Date of Patent: July 8, 2025Assignee: InterDigital Patent Holdings, Inc.Inventors: Xiaofei Wang, Monisha Ghosh, Lei Wang, Nirav B. Shah, Guodong Zhang, Sudheer A. Grandhi
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Publication number: 20250220674Abstract: Techniques, devices and systems are disclosed for generating a resource request poll comprising at least one response criteria, transmitting the resource request poll, receiving a resource request report from STAs that meet at least one response criteria. A trigger frame may be transmitted to the at least one STA based on the resource request report from the at least one STA. The response criteria may include at least one of a NFRP, a UL access type, a delay bound, an NDP feedback report AC, a number of indicated AID bits, an AID range, an information requested, a number of bits to be included in NDP feedback report or preamble, number of LTFs to be included in the NDP feedback report or preamble, and a number of bits to be included in NDP feedback report or preamble per LTF or per N LTF symbol.Type: ApplicationFiled: March 18, 2025Publication date: July 3, 2025Applicant: InterDigital Patent Holdings, Inc.Inventors: Xiaofei Wang, Hanqing Lou, Alphan Sahin, Li-Hsiang Sun, Joseph S. Levy, Rui Yang
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Patent number: 12342395Abstract: A method performed by a STA may comprise receiving a frame, from a first AP including an indication of a configuration change counter (CCC) associated with a second AP. The CCC may be an unsigned integer that increments when an update to one or more AP parameters of the second AP has occurred. The method may further comprise establishing a first wireless link with the first AP and establishing a master key via at least the first wireless link.Type: GrantFiled: December 22, 2023Date of Patent: June 24, 2025Inventors: Lei Wang, Yousif Targali, Sudheer A. Grandhi, Xiaofei Wang, Guodong Zhang
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Patent number: 12341580Abstract: Methods and apparatuses for multiple input-multiple output (MIMO) channel access are provided herein. A method performed by a station (STA) may include receiving, from an initiating STA, a frame including information indicating a broadcast address and a control trailer. The control trailer may include information indicating that a multi-user multiple input-multiple output (MU-MIMO) frame is to be received from the initiating STA, and information indicative of a plurality of STAs, the plurality of STAs including the STA. The method may include transmitting a response frame to the indicated broadcast address based on the received frame and receiving the MU-MIMO frame from the initiating STA.Type: GrantFiled: December 12, 2023Date of Patent: June 24, 2025Assignee: InterDigital Patent Holdings, Inc.Inventors: Frank La Sita, Hanqing Lou, Oghenekome Oteri, Alphan Sahin, Li-Hsiang Sun, Xiaofei Wang, Rui Yang
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Publication number: 20250202535Abstract: Methods performed by a station (STA) are provided herein. A method may include transmitting an association request frame to a first access point (AP) of a plurality of APs in a virtual AP set. The method may include receiving an association response frame from the first AP that indicates successful association with the virtual AP set. The method may include receiving, from the first AP, in a first frequency band, a first frame that includes an association identifier (AID) associated with the virtual AP set. The method may include receiving, from a second AP of the plurality of APs in the virtual AP set, in a second frequency band, a second frame that includes the AID assigned in association with the virtual AP set.Type: ApplicationFiled: February 27, 2025Publication date: June 19, 2025Applicant: InterDigital Patent Holdings, Inc.Inventors: Hanqing Lou, Xiaofei Wang, Li-Hsiang Sun, Oghenekome Oteri, Rui Yang, Joseph S. Levy, Frank La Sita
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Publication number: 20250202669Abstract: Systems, methods and instrumentalities are disclosed to transmission scheduling. A station (STA) in its own basic service set (BSS) receiving a transmission frame from an overlapping BSS (OBSS). The STA may decode preamble of the received transmission frame. The STA may determine, for example, using the decoded preamble that OBSS information and transmit scheme associated with the OBSS. On a condition that the transmit scheme associated with the OBSS is orthogonal frequency divisional multiple access (OFDMA), the STA in its own BSS may indicate to its access point (AP) that one or more channels or sub-channels that are available or not available for transmission. On a condition that the transmit scheme determined from the preamble of the transmission frame is orthogonal frequency divisional multiplexing (OFDM), the STA may determine that a channel is not available for transmission. The STA may set the channel to busy or idle.Type: ApplicationFiled: February 28, 2025Publication date: June 19, 2025Applicant: InterDigital Patent Holdings, Inc.Inventors: Oghenekome Oteri, Yuan Sheng Jin, Hanqing Lou, Xiaofei Wang, Robert Olesen
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Publication number: 20250193741Abstract: Methods and apparatuses are described herein for Extremely High Throughput (EHT) link adaptation (ELA). A station (STA) may receive a first physical layer protocol data unit (PPDU) including a first primary secondary (PS)160 subfield and a High Efficiency (HE)/EHT subfield. The HT/EHT subfield may indicate whether a second PPDU that will be transmitted by the STA is based on HE-related parameters or EHT-related parameters. The first PS160 subfield may indicate a primary 160 MHz channel or a secondary 160 MHz channel. The STA may transmit, based on the HE/EHT subfield, the second PPDU including a second PS160 subfield, an EHT-MCS subfield, and a number of spatial streams (NSS) subfield. The second PS160 subfield may indicates a 160 MHz channel determined based on the indication of the first PS160 subfield. An index of the EHT-MCS subfield and a value of the NSS subfield may be determined based measurement of the determined 160 MHz channel.Type: ApplicationFiled: March 10, 2023Publication date: June 12, 2025Applicant: INTERDIGITAL PATENT HOLDINGS, INC.Inventors: Zinan Lin, Hanqing Lou, Xiaofei Wang, Rui Yang
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Publication number: 20250193718Abstract: Device, systems, and/or techniques for using sub-channel signaling information between an access point and a first station are disclosed. In one aspect, a method performed by a station (STA) includes: receiving, from a neighboring STA in an overlapping basic service set (OBSS), a physical (PHY) layer preamble that includes a signal field indicating a plurality of sub-bands and associated power thresholds for Uplink Orthogonal Frequency-Divisional Multiple Access (UL OFDMA) transmission, that are available for OBSS spatial reuse (SR) by the STA; and sending, to an AP with which the STA is associated, an UL OFDMA transmission using a sub-band of the plurality of sub-bands and an associated power threshold indicated in the signal field. Additional embodiments are disclosed.Type: ApplicationFiled: February 18, 2025Publication date: June 12, 2025Applicant: InterDigital Patent Holdings, Inc.Inventors: Oghenekome Oteri, Hanqing Lou, Nirav B. Shah, Xiaofei Wang, Rui Yang, Guodong Zhang, Frank La Sita, Robert L. Olesen
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Patent number: 12302327Abstract: A method of multi-access point (multi-AP) communication performed by a wireless transmit/receive unit (WTRU) comprises: receiving a first trigger frame from a first access point (AP) of a plurality of APs, the first trigger frame comprising first information; receiving a second trigger frame from a second AP of the plurality of APs at a predetermined time duration after receiving the first trigger frame, the second trigger frame also comprising the first information of the first trigger frame; generating a synchronization frame based on the first trigger frame and the second trigger frame, the synchronization frame comprising synchronization information; transmitting the synchronization frame to at least the first AP and the second AP; and receiving a data transmission based on the synchronization information from each of the first AP and the second AP.Type: GrantFiled: November 29, 2023Date of Patent: May 13, 2025Assignee: InterDigital Patent Holdings, Inc.Inventors: Oghenekome Oteri, Hanqing Lou, Li-Hsiang Sun, Xiaofei Wang, Alphan Sahin, Rui Yang, Frank La Sita
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Patent number: 12302390Abstract: Systems, methods, and instrumentalities are provided to implement transmission scheduling. A multiband device may send a request via a first frequency band. The request may include a multiband Request to Send (MRTS) transmission. The request may be associated with a second frequency band and/or a beamforming training schedule. The first frequency band may be associated with a quasi-omni transmission and the second frequency band may be associated with a directional transmission. The first frequency band may be a 5 GHz band and the second frequency band may be a 60 GHz band. The multiband device may receive a multiband Clear to Send (MCTS) transmission via the first frequency band confirming the request. The multiband device may be configured to send a beamforming signal in accordance with the request, for example, via the second frequency band. The beamforming signal may be sent in accordance with a beamforming training schedule.Type: GrantFiled: June 10, 2019Date of Patent: May 13, 2025Assignee: InterDigital Patent Holdings, Inc.Inventors: Hanqing Lou, Monisha Ghosh, Xiaofei Wang, Robert L. Olesen
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Patent number: 12302382Abstract: Enhanced protocols and devices may be used to alleviate loss of spectrum efficiency in wideband transmission. The protocols may implement a wideband transmission opportunity (TXOP) truncation where one or more of the channels involved in communication over the wideband are released. In one scenario, an access point (AP) may receive, from a wireless transmit receive unit (WTRU), a first CF-End frame that includes a duration field and a basic service set identifier (BSSID) field that includes an individual/group bit. On a condition that the individual/group bit of the BSSID field has a value of one (1), the AP may determine that a scrambling sequence of the first CF-End frame indicates a bandwidth associated with a transmit opportunity (TXOP) being truncated by the WTRU. The AP may then transmit a second CF-End frame at the bandwidth indicated by the scrambling sequence of the first CF-End frame.Type: GrantFiled: October 2, 2023Date of Patent: May 13, 2025Assignee: InterDigital Patent Holdings, Inc.Inventors: Bhaskar M. Anepu, Sudheer A. Grandhi, Xiaofei Wang
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Publication number: 20250151107Abstract: Methods, devices and systems are provided for performing for multi-user (MU) transmission. A wireless transmit/receive unit (WTRU) may be configured to receive a frame, decode the received frame and determine whether the received frame is a null data packet (NDP) multi-user (MU) media access control (MAC) physical layer convergence protocol (PLCP) protocol data unit (PPDU) (NDP MU MAC PPDU) based on meeting an NDP condition. The NDP MU MAC PPDU may correspond to an MU transmission and may include a PLCP header which includes an NDP signal (SIG) field having MU control information. Based on the received frame meeting the NDP condition, the WTRU may be further configured to process the NDP SIG field, generate a response based on the NDP SIG field and the MU control information, and transmit the response.Type: ApplicationFiled: December 31, 2024Publication date: May 8, 2025Applicant: InterDigital Patent Holdings, Inc.Inventors: Hanqing Lou, Guodong Zhang, Robert Olesen, Xiaofei Wang
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Publication number: 20250132784Abstract: A method and apparatus may be used in multi-AP and multi-wireless transmit/receive unit joint transmissions. The apparatus may be configured to transmit a joint transmission request on a first medium, and receive a joint transmission response on the first medium. In response, the apparatus my perform a joint transmission negotiation on a second medium and transmit data on the second medium based on the joint transmission negotiation. The apparatus may be configured to perform coordinated sectorized or beamformed transmissions through access point (AP)/PCP negotiations. The apparatus may provide an indication of support for joint transmission and coordinated sectorized or beamformed transmissions. The method and apparatus may also implement multi-AP/WTRU request-to-send (RTS)/clear-to-send (CTS) procedures. The apparatus may be configured to perform coordinated sectorized or beamforming grouping.Type: ApplicationFiled: December 31, 2024Publication date: April 24, 2025Applicant: InterDigital Patent Holdings, Inc.Inventors: Xiaofei Wang, Guodong Zhang, Oghenekome Oteri, Pengfei Xia
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Publication number: 20250119191Abstract: Dynamic puncturing in a wireless local area network (WLAN) supporting 320 MHz bandwidths is disclosed. In one example, a method includes a first station (STA1) transmitting a null data packet announcement (NDPA) frame including an indicator of an orthogonal frequency division multiple access (OFDMA) subchannel puncturing over a wireless medium and subsequently transmitting a null data packet (NDP) having a U-SIG field specifying an OFDMA puncturing pattern. The NDPA may indicate that the subsequent NDP, which preferably occupies an 80 MHz channel, includes the OFDMA puncturing pattern in its U-SIG field. The method may further include transmitting a beamforming report poll (BFRP) soliciting measurement by the receiving station (STA2) on active resources, e.g., subchannels which have not been punctured.Type: ApplicationFiled: February 6, 2023Publication date: April 10, 2025Applicant: INTERDIGITAL PATENT HOLDINGS, INC.Inventors: Hanqing Lou, Zinan Lin, Mahmoud Saad, Xiaofei Wang, Rui Yang