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：US10862549B2

公开(公告)日：2020-12-08

申请号：US15911584

申请日：2018-03-05

Applicant: NXP USA, Inc.

Inventor： Liwen Chu ,  Lei Wang ,  Hongyuan Zhang ,  Hui-Ling Lou ,  Yakun Sun ,  Jinjing Jiang

IPC: H04B7/0413 ,  H04L5/00 ,  H04W72/04 ,  H04W74/02 ,  H04B7/0452 ,  H04L27/26 ,  H04W84/12

Abstract: A first communication device allocates respective frequency sub-channels for subsequent orthogonal frequency division multiple access (OFDMA) communications with two or more second communication devices, including allocating a first frequency sub-channel, a second frequency sub-channel, and a third frequency sub-channel between the first frequency sub-channel and the second frequency sub-channel. The first communication device generates and transmits a first downlink OFDMA data unit configured to prompt the two or more second communication devices to transmit as part of a multi-user transmission that spans the first frequency sub-channel, the second frequency sub-channel, and the third frequency sub-channel. The first communication device receives an uplink OFDMA transmission and determines that the uplink OFDMA transmission did not include a transmission within the third frequency sub-channel. In response, the first communication device does not transmit within the third frequency sub-channel when transmitting one or more subsequent downlink OFDMA data units via the communication channel.

公开(公告)号：US20200288393A1

公开(公告)日：2020-09-10

申请号：US16849063

申请日：2020-04-15

Applicant: NXP USA, INC.

Inventor： Hongyuan Zhang ,  Mingguang Xu ,  Yakun Sun

IPC: H04W52/02 ,  H04L27/26 ,  H04L5/00 ,  H04W52/16 ,  H04W52/32

Abstract: Accordingly, systems and methods for managing power when the number of training and data tones are increased in a wireless communications system are provided. An L-SIG field is generated that includes a set of data and pilot tones, wherein the pilot tones are inserted between the data tones in the set of data and pilot tones. A plurality of training tones is added to the L-SIG field before and after the set of data and pilot tones. A symbol is generated that includes the L-SIG field, an L-LTF field, and a data field, wherein the training tones of the L-SIG field provide channel estimates for the data field. Power of the L-LTF field is managed relative to power of the L-SIG field in the generated symbol in a time domain.

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：US11463908B2

公开(公告)日：2022-10-04

申请号：US16939813

申请日：2020-07-27

Applicant: NXP USA, INC.

Inventor： Yakun Sun ,  Hongyuan Zhang ,  Sudhir Srinivasa ,  Xiayu Zheng

IPC: H04W28/06 ,  H04L25/02 ,  H04L27/26 ,  H04B7/06 ,  H04B7/04 ,  H04W84/12

Abstract: Some embodiments described herein provide a method for transmitting a preamble in accordance with a wireless local area network communication protocol. In some embodiments, a data frame may be obtained for transmission including a preamble compliant with the wireless local area network communication protocol. It may be determined that the preamble includes a first preamble portion that spans multiple symbol durations and a second preamble portion that spans a single symbol duration. The first preamble portion via beamforming may be transmitted based on a first beamforming matrix. When a transmission mode of the second preamble portion is beamforming, a second beamforming matrix may be generated based on the first beamforming matrix, each tone for the second preamble portion may be calculated based on the second beamforming matrix. Each calculated tone may be transmitted in accordance with the wireless local area network communication protocol.

公开(公告)号：US11202310B2

公开(公告)日：2021-12-14

申请号：US16792351

申请日：2020-02-17

Applicant: NXP USA, INC.

Inventor： Jinjing Jiang ,  Liwen Chu ,  Lei Wang ,  Yakun Sun ,  Hongyuan Zhang ,  Huiling Lou

IPC: H04W74/00 ,  H04W48/20 ,  H04W74/08 ,  H04W84/12

Abstract: A communication device determines, in connection with a prior uplink multi-user (UL MU) communication in which the communication device participated, whether the communication device is to use one or more first channel access parameters, or one or more second channel access parameters for accessing a communication medium for a single user (SU) transmission by the communication device, where using the one or more first channel access parameters is associated with a greater probability of obtaining access to the communication medium as compared to using the one or more second channel access parameters. Depending on the determination made, the communication device uses the one or more first channel access parameters, or the one or more second channel access parameters to attempt to access the communication medium. In response to accessing the communication medium, the communication device transmits the SU transmission via the communication medium.

公开(公告)号：US10945245B2

公开(公告)日：2021-03-09

申请号：US16532051

申请日：2019-08-05

Applicant: NXP USA, Inc.

Inventor： Liwen Chu ,  Yakun Sun ,  Hongyuan Zhang ,  Lei Wang ,  Jinjing Jiang ,  Hui-Ling Lou

IPC: H04W72/04 ,  H04L27/26 ,  H04L5/00 ,  H04W72/00 ,  H04W4/06

Abstract: Multiple trigger frames are generated at a first communication device to trigger an uplink orthogonal frequency multiple access (OFDMA) transmission by multiple second communication devices. The multiple trigger frames include a broadcast trigger frame that includes information to indicate transmission parameters for a first subset of the second communication devices, and one or more unicast trigger frames, each of the one or more unicast trigger frame including information to indicate transmission parameters for a particular second communication device in a second subset of the second communication devices. The broadcast trigger frame is transmitted, in a first frequency portion of a downlink OFDMA transmission, to the first subset of the second communication devices, and respective unicast trigger frames are transmitted, in respective second frequency portions of the downlink OFDMA transmission, to the second subset of the second communication devices.

公开(公告)号：US10938454B2

公开(公告)日：2021-03-02

申请号：US16700613

申请日：2019-12-02

Applicant: NXP USA, Inc.

Inventor： Liwen Chu ,  Lei Wang ,  Hongyuan Zhang ,  Hui-Ling Lou ,  Yakun Sun ,  Jinjing Jiang

IPC: H04B7/0413 ,  H04L5/00 ,  H04W72/04 ,  H04L27/26 ,  H04W74/02 ,  H04B7/0452 ,  H04W84/12

Abstract: A first communication device transmits a trigger frame transmission to multiple second communication devices to prompt the multiple second communication devices to simultaneously transmit in multiple communication sub-channels. The first communication device receives one or more transmissions from one or more of the second communication devices in less than all of the communication sub-channels. The first communication device generates acknowledgment information for the one or more transmissions from the one or more of the second communication devices, and transmits the acknowledgment information via all of communication sub-channels.

公开(公告)号：US10797821B1

公开(公告)日：2020-10-06

申请号：US16505356

申请日：2019-07-08

Applicant: NXP USA, Inc.

Inventor： Yakun Sun ,  Hongyuan Zhang

IPC: H04L5/00 ,  H04L1/00 ,  H04L27/26 ,  H04W88/06

Abstract: A communication device receives a physical layer (PHY) data unit via a communication channel, and analyzes i) a length value in a field in a legacy portion of a PHY preamble of the PHY data unit, and ii) a phase of modulation of an orthogonal frequency division modulation (OFDM) symbol in a non-legacy portion of the PHY preamble. The communication device determines a format of the received PHY data unit corresponding to the analysis of i) the length value and ii) the phase of modulation of the OFDM symbol in the non-legacy portion of the PHY preamble, where the determined format is from a set of multiple PHY formats defined by a communication protocol. The communication device then processes the received PHY data unit according to the determined format.

公开(公告)号：US10790937B1

公开(公告)日：2020-09-29

申请号：US15876360

申请日：2018-01-22

Applicant: NXP USA, Inc.

Inventor： Yakun Sun ,  Liwen Chu ,  Hongyuan Zhang ,  Sudhir Srinivasa ,  Hui-Ling Lou

IPC: H04L1/18 ,  H04L5/00 ,  H04L27/26 ,  H04L1/16 ,  H04W84/02 ,  H04W84/12

Abstract: A first communication device generates and transmits a first physical layer (PHY) data unit as part of a hybrid automatic repeat request (HARQ) session, the first PHY data unit having a first plurality of media access control (MAC) protocol data units (MPDUs) including a first MPDU. The first communication device determines that a second communication device did not acknowledge successfully receiving the first MPDU. The first communication device generates and transmits a second PHY data unit as part of the HARQ session, the second PHY data unit having a second plurality of MPDUs, the second plurality of MPDUs including the first MPDU.