公开(公告)号：US20230060492A1

公开(公告)日：2023-03-02

申请号：US17894998

申请日：2022-08-24

Applicant: NXP USA, Inc.

Inventor： Dong Wei ,  Rui Cao ,  Hongyuan Zhang ,  Christian Raimund Berger ,  Liwen Chu

IPC: H04W24/08 ,  H04W52/14 ,  H04W52/54

Abstract: Embodiments of a device, a method, and a system for wireless local area network (WLAN) sensing are disclosed. In an embodiment, the device for WLAN sensing includes a wireless network interface device implemented on one or more integrated circuits (ICs), where the wireless network interface device is configured to receive a sounding Physical Layer (PHY) Protocol Data Unit (PPDU) that includes preamble training fields, and detect environmental changes using managed sensing measurements obtained from the preamble training fields included in the sounding PPDU.

公开(公告)号：US20220416988A1

公开(公告)日：2022-12-29

申请号：US17842740

申请日：2022-06-16

Applicant: NXP USA, Inc.

Inventor： Rui Cao ,  Ying Liu ,  Dong Wei ,  Yan Zhang

IPC: H04L5/00 ,  H04B1/69

Abstract: A wireless communication system, apparatus, and methodology are described for enabling wireless communication station (STA) devices to generate a Physical Layer Protocol Data Unit (PPDU) that includes a resource unit (RU) having a size that is less than a spreading frequency block by using one or more predetermined pilot and/or data tone mapping plans to control how each pilot/data tone from the RU is distributed onto a disjoint set of pilot/data subcarriers forming a distributed RU included in the spreading frequency block, thereby accommodating transmission of wider bandwidth and multiple resource unit assignments in accordance with power spectrum density (PSD) limits provided for orthogonal frequency-division multiplexing (OFDM) modulated symbols supported by emerging 802.11 standards.

公开(公告)号：US11539481B2

公开(公告)日：2022-12-27

申请号：US17354084

申请日：2021-06-22

Applicant: NXP USA, Inc.

Inventor： Yan Zhang ,  Sudhir Srinivasa ,  Hongyuan Zhang ,  Rui Cao

IPC: H04W84/12 ,  H04L5/00 ,  H04B7/0452

Abstract: A first device transmits to a second device a first data unit which indicates a maximum number of long training field (LTF) symbols that the first device transmits and receives for a multiple input multiple output communication. The first device receives, from the second device, a second data unit which comprises a plurality of LTF symbols up to the maximum number of LTF symbols the first device receives indicated by the first data unit. A channel estimation is performed based on the plurality of LTF symbols of the second data unit up to the maximum number of LTF symbols indicated by the first data unit to recover information in one or more fields of the second data unit. For the case when the second data unit is a trigger frame, the first device generates the third data unit with a plurality of LTF symbols up to the maximum number of LTF symbols the first device transmits indicated by the first data unit and transmits the third data unit.

公开(公告)号：US20220408462A1

公开(公告)日：2022-12-22

申请号：US17806859

申请日：2022-06-14

Applicant: NXP USA, Inc

Inventor： Rui Cao

IPC: H04W72/12

Abstract: Wireless communications comprises generating a trigger frame which has a first set of bits which directly indicates a resource unit (RU) arranged as a distributed RU is solicited to be transmitted in an uplink direction in a first frequency block and a second set of bits which directly indicates for one or more second frequency subblocks a spreading bandwidth of tones of the distributed RU or whether a second frequency subblock is a punctured subchannel. An access point (AP) transmits the trigger frame in a downlink direction to a non-AP station. The non-AP station generates and transmits in the uplink direction a Physical Layer Protocol Data Unit (PPDU) to the AP station with data modulated on the tones of the distributed RU based on the first set of bits and the second set of bits of the trigger frame.

公开(公告)号：US11496926B2

公开(公告)日：2022-11-08

申请号：US17319060

申请日：2021-05-12

Applicant: NXP USA, Inc.

Inventor： Rui Cao ,  Sudhir Srinivasa ,  Hongyuan Zhang ,  Mao Yu

IPC: H04W28/06 ,  H04L27/26 ,  H04L69/04 ,  H04W72/04

Abstract: In an 802.11be wireless system, data units are generated for transmission by configuring a transmitting device to process encoding parameters, including a first encoding parameter NSD and a second encoding parameter NSD,short, to select a padding boundary from pre-defined padding boundaries in the last symbol that will most closely include the number of information bits NEXCESS in the last symbol and to append padding bits to the number of information bits NEXCESS to fill up to the selected padding boundary in the last symbol, thereby generating pre-encoded data bits which are encoded for data transmission, where at least the first encoding parameter NSD is specified for an aggregated resource unit size that is allowed under the 802.11be protocol as a sum of NSD values for at two other resource units.

公开(公告)号：US11490362B2

公开(公告)日：2022-11-01

申请号：US17012702

申请日：2020-09-04

Applicant: NXP USA, INC.

Inventor： Hongyuan Zhang ,  Rui Cao ,  Yan Zhang ,  Liwen Chu

IPC: H04W72/00 ,  H04L1/18 ,  H04W72/04 ,  H04W4/44

Abstract: Certain specific examples are directed to or involve a plurality of vehicular communication stations including a first type and a second type which communicate over a shared communications channel characterized by a common RF frequency band. The stations may also include at least one of the plurality of vehicular communication stations broadcasting a set of vehicle-specific data over the shared communication channel for reception by the first type according to a first wireless communication protocol and concurrently for reception by the second type according to a second different wireless communication protocol. The broadcast may include a plurality of repetitive consecutive transmissions of the set of vehicle-specific data which may allow for improved range extension and reliability. Each of the repetitive consecutive transmissions may be formatted consistent with the first wireless communication protocol.

公开(公告)号：US11387955B2

公开(公告)日：2022-07-12

申请号：US17095625

申请日：2020-11-11

Applicant: NXP USA, Inc.

Inventor： Liwen Chu ,  Rui Cao ,  Hongyuan Zhang ,  Huiling Lou

IPC: H04L5/00 ,  H04W80/02 ,  H04W28/06 ,  H04L1/16 ,  H04W4/40

Abstract: In an IEEE 802.11bc wireless system, aggregated data frames are communicated between first and second STA devices by configuring the first STA device to assemble and transmit an A-MPDU frame having multiple A-MPDU subframes characterized by a fixed MPDU start spacing parameter and a fixed maximal MPDU length parameter, where the first STA device is configured with the fixed MPDU start spacing parameter and the fixed maximal MPDU length parameter without negotiating association request and response messages, and by configuring the second STA device to assemble and transmit a BA message comprising a BA bitmap identifying the one or more of the multiple A-MPDU subframes which are not successfully received by the second STA device, where the BA bitmap has a size characterized by a fixed buffer size parameter which is configured at the second STA device without negotiating add BA request (ADDBA Request) request and response messages.

公开(公告)号：US11212705B2

公开(公告)日：2021-12-28

申请号：US16882366

申请日：2020-05-22

Applicant: NXP USA, Inc.

Inventor： Rui Cao ,  Hongyuan Zhang ,  Liwen Chu ,  Sudhir Srinivasa

IPC: H04W28/06 ,  H04L1/00 ,  H04L27/18 ,  H04W84/12

Abstract: Techniques for signaling new versions of a communication protocol differentiated from legacy versions of the communication protocol that are interoperable with stations implementing legacy versions of the communication protocol, that are compatible with future new versions of the communication protocol, and that do not overly complicate the receiver state machine have been disclosed.

公开(公告)号：US20210399850A1

公开(公告)日：2021-12-23

申请号：US17354084

申请日：2021-06-22

Applicant: NXP USA, Inc.

Inventor： Yan Zhang ,  Sudhir Srinivasa ,  Hongyuan Zhang ,  Rui Cao

IPC: H04L5/00 ,  H04B7/0452

Abstract: A first device transmits to a second device a first data unit which indicates a maximum number of long training field (LTF) symbols that the first device transmits and receives for a multiple input multiple output communication. The first device receives, from the second device, a second data unit which comprises a plurality of LTF symbols up to the maximum number of LTF symbols the first device receives indicated by the first data unit. A channel estimation is performed based on the plurality of LTF symbols of the second data unit up to the maximum number of LTF symbols indicated by the first data unit to recover information in one or more fields of the second data unit. For the case when the second data unit is a trigger frame, the first device generates the third data unit with a plurality of LTF symbols up to the maximum number of LTF symbols the first device transmits indicated by the first data unit and transmits the third data unit.

公开(公告)号：US20210336752A1

公开(公告)日：2021-10-28

申请号：US17239363

申请日：2021-04-23

Applicant: NXP USA, Inc.

Inventor： Young Hoon Kwon ,  Rui Cao ,  Liwen Chu ,  Hongyuan Zhang ,  Hari Ram Balakrishnan ,  Sudhir Srinivasa ,  Sayak Roy ,  Xiayu Zheng

IPC: H04L5/00 ,  H04L1/18 ,  H04L25/02 ,  H04L1/00

Abstract: Embodiments of a method and an apparatus for wireless communications are disclosed. In an embodiment, a method for wireless communications involves operating an Access Point (AP) using feedback subcarrier indices for a bandwidth up to 320 MHz, signaling, by the AP, to a client, a subcarrier location set on which a feedback report is solicited, signaling, by the AP, to a client, a feedback type solicited on the subcarrier location, and indicating, by the client, feedback subcarrier indices for the subcarrier location set via the feedback report solicited by the AP.