公开(公告)号：US20210385115A1

公开(公告)日：2021-12-09

申请号：US17181935

申请日：2021-02-22

Applicant: NXP USA, Inc.

Inventor： Rui Cao ,  Liwen Chu ,  Young Hoon Kwon ,  Hongyuan Zhang ,  SUDHIR SRINIVASA

IPC: H04L27/26 ,  H04L29/06 ,  H04L5/00

Abstract: One example discloses an IEEE 802.11 compliant wireless communications device, including: a processor configured to generate a hybrid-physical protocol data unit (hybrid-PPDU) that includes a set of sub-PPDUs; a first sub-PPDU in the set of sub-PPDUs includes a first preamble portion and a first data payload portion; a second sub-PPDU in the set of sub-PPDUs includes a second preamble portion and a second data payload portion; wherein an OFDMA communications signal includes a set of symbol tones divided into a set of resource units (RUs); wherein the processor is configured to map the first sub-PPDU to a first RU within the set of RUs, and map the second sub-PPDU to a second RU within the set of RUs; and wherein the first preamble portion corresponds to a first 802.11 packet format, and the second preamble portion corresponds to a second 802.11 packet format.

公开(公告)号：US20210360633A1

公开(公告)日：2021-11-18

申请号：US17323811

申请日：2021-05-18

Applicant: NXP USA, Inc.

Inventor： Liwen CHU ,  Yi-Ling Chao ,  Hongyuan Zhang ,  Huiling Lou ,  Young Hoon Kwon ,  Rui Cao

IPC: H04W72/04 ,  H04W52/36

Abstract: Various embodiments relate to a method performed by a station to identify the maximum allowed transmit power spectral density (PSD) of a basic service set (BSS), including: receiving, by the station, a first field from an access point (AP) of the BSS, wherein the first field indicates that the BSS bandwidth is set to M times a unit channel bandwidth; receiving, by the station, a set of second fields from the AP, wherein the set of second fields includes K fields corresponding to K channels and wherein each of the K second fields indicates the maximum allowed transmit PSD for the K channels and the bandwidth of the channel is the unit channel bandwidth; and identifying, by the station, the maximum allowed transmit PSD of the M channels of the BSS bandwidth from the first M consecutive second fields.

公开(公告)号：US20210194621A1

公开(公告)日：2021-06-24

申请号：US17194847

申请日：2021-03-08

Applicant: NXP USA, INC.

Inventor： Yakun Sun ,  Hongyuan Zhang ,  Sudhir Srinivasa ,  Rui Cao

IPC: H04L1/00 ,  H04L5/00 ,  H04L27/26

Abstract: Systems, apparatuses and methods described herein provide a method for padding a signal extension of orthogonal frequency-division multiplexing (OFDM) symbols. A transceiver may obtain a plurality of data symbols for transmission, and determine that a number of information bits for a last symbol of the plurality of data symbols is not an integer value. A special padding rule may be applied to add padding bits to the last symbol. A number of coded bits for the last symbol may be determined when the number of information bits for the last symbol has changed, and the plurality of data symbols for data transmission may be encoded based on the determined number of coded bits for the last symbol.

公开(公告)号：US20210160959A1

公开(公告)日：2021-05-27

申请号：US17102656

申请日：2020-11-24

Applicant: NXP USA, Inc.

Inventor： Rui Cao ,  Hongyuan Zhang ,  Sudhir Srinivasa

IPC: H04W80/02 ,  H04W72/04 ,  H04L5/00 ,  H04B7/0413

Abstract: A data unit comprising bits to transmit over one or more frequency segments in a frequency range is obtained. An effective bandwidth in each frequency segment of the frequency range is determined, where the effective bandwidth excludes bandwidth of one or more punctured subchannels in a respective frequency segment. Bits are encoded based on the effective bandwidth of each frequency segment followed by parsing the encoded bits to one or more streams and parsing the encoded bits of a stream to the one or more frequency segments. The parsing of the encoded bits of the stream comprises allocating a first number of consecutive encoded bits to a first frequency segment and allocating a second number of consecutive encoded bits to a second frequency segment, wherein the first number and the second number are based on the effective bandwidth of the first frequency segment and the second frequency segment. The encoded bits are modulated and mapped to subcarriers for transmission.

公开(公告)号：US20200382998A1

公开(公告)日：2020-12-03

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 ,  H04L27/18 ,  H04L1/00

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：US10715368B2

公开(公告)日：2020-07-14

申请号：US16564927

申请日：2019-09-09

Applicant: NXP USA, Inc.

Inventor： Hongyuan Zhang ,  Yakun Sun ,  Mingguang Xu ,  Rui Cao ,  Hui-Ling Lou

IPC: H04L27/26 ,  H04L5/00 ,  H04L1/00 ,  H04L1/06 ,  H04W84/12

Abstract: A communication device generates a first portion of a physical layer (PHY) preamble of a PHY data unit to include a first plurality of orthogonal frequency division multiplexing (OFDM) symbols. Each OFDM symbol of the first plurality of OFDM symbols is modulated on at most X OFDM subcarriers, where X is a positive integer greater than one. The communication device generates a second portion of the PHY preamble to include a second plurality of OFDM symbols. Each OFDM symbol of the second plurality of OFDM symbols is modulated on at most N*X OFDM subcarriers, where N is a positive integer greater than one. The communication device generates a PHY data portion of the PHY data unit to include one or more third OFDM symbols. Each third OFDM symbol is modulated on at most N*X OFDM subcarriers. The communication device transmits the PHY data unit via the wireless communication channel.

公开(公告)号：US12245226B2

公开(公告)日：2025-03-04

申请号：US17806859

申请日：2022-06-14

Applicant: NXP USA, Inc.

Inventor： Rui Cao

IPC: H04W72/1268 ,  H04W72/23

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：US20240340026A1

公开(公告)日：2024-10-10

申请号：US18629795

申请日：2024-04-08

Applicant: NXP USA, Inc.

Inventor： Amer Al-Baidhani ,  Yan Zhang ,  Rui Cao ,  Sudhir Srinivasa ,  Hongyuan Zhang

IPC: H03M13/25 ,  H04L1/00 ,  H04L5/00 ,  H04W84/12

CPC classification number: H03M13/255 ,  H04L1/0008 ,  H04L5/0007 ,  H04W84/12

Abstract: Embodiments of a method and apparatus for wireless communications are disclosed. In an embodiment, a wireless device includes a controller configured to generate a control signal and a wireless transceiver configured to, in response the control signal, perform a low-density parity-check (LDPC) encoding operation to generate an encoded data unit with extra LDPC symbol segments.

公开(公告)号：US20240236810A9

公开(公告)日：2024-07-11

申请号：US18382457

申请日：2023-10-20

Applicant: NXP USA, Inc.

Inventor： Liwen Chu ,  Rui Cao ,  Kiseon Ryu ,  Hongyuan Zhang

IPC: H04W40/22

CPC classification number: H04W40/22 ,  H04W84/12

Abstract: Embodiments of a method and apparatus for wireless communications are disclosed. In an embodiment, a wireless device includes a controller configured to select a wireless relay device from multiple wireless relay devices for data exchanges between the wireless device and a second wireless device and a wireless transceiver configured to exchange data with the second wireless device through the selected wireless relay device.

公开(公告)号：US20240178931A1

公开(公告)日：2024-05-30

申请号：US18523816

申请日：2023-11-29

Applicant: NXP USA, Inc.

Inventor： Yan Zhang ,  Amer Al-Baidhani ,  Rui Cao

IPC: H04L1/00 ,  H04L5/00

CPC classification number: H04L1/0003 ,  H04L5/0044 ,  H04W84/12

Abstract: In an IEEE 802.11 wireless system, a wireless STA is configured to signal a plurality of different spatial stream encoding values to a second STA device in a wireless personal area network in accordance with IEEE 802.11 protocol by generating a signaling physical layer protocol data unit (PPDU) which comprises a dedicated user information field which directly or indirectly identifies a plurality of different modulation and coding selection (MCS) values or different modulation orders used to encode different spatial streams from a plurality of spatial streams Nss used in a beamformed MIMO transmission of a data packet for each scheduled user of the signaling PPDU.