公开(公告)号：US10320459B2

公开(公告)日：2019-06-11

申请号：US14338914

申请日：2014-07-23

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Hongyuan Zhang ,  Rohit U. Nabar ,  Pen Chung Li

IPC: H04B7/06 ,  H04W28/04 ,  H04B7/022 ,  H04B7/0413 ,  H04L25/03 ,  H04L25/02 ,  H04B7/0456 ,  H04W84/12

Abstract: In a method for reducing interference in a first wireless communication network and a second wireless communication network, a first access point (AP) device of the first wireless communication network coordinates with a second AP device of the second wireless communication network with respect to utilizing transmit beamforming at the first AP device and transmit beamforming at the second AP device for the purpose of reducing interference in the first wireless communication network and the second wireless communication network. Based on coordinating with the second AP device, the first AP device uses a beamforming matrix to transmit, via a multiple input, multiple output (MIMO) communication channel, to one or more first stations in the first wireless communication network for mitigating interference between the first wireless communication network and the second wireless communication network.

公开(公告)号：US10313923B2

公开(公告)日：2019-06-04

申请号：US16039248

申请日：2018-07-18

Applicant: Marvell World Trade Ltd.

Inventor： Liwen Chu ,  Hongyuan Zhang ,  Hui-Ling Lou

IPC: H04L5/00 ,  H04W28/18 ,  H04L12/851 ,  H04L27/26 ,  H04B7/0452 ,  H04W28/04 ,  H04L1/18 ,  H04L1/16 ,  H04W84/12

Abstract: A first communication device receives one or more aggregate medium access control (MAC) data units from respective one or more second communication devices. Respective aggregate MAC data units include multiple MAC data units from respective ones of the one or more second communication devices. The first communication device generates one or more acknowledgement information fields, including a first acknowledgement information field corresponding to a particular second communication device includes i) a length indication that indicates a length of an acknowledgement field, and ii) the acknowledgment field of the indicated length. The acknowledgement field includes respective acknowledgement information for at least some of the multiple MAC data units received from the particular second communication device. The first communication device generates an acknowledgement data unit to include the one or more one or more acknowledgement information fields, and transmits the acknowledgment data unit to the one or more second communication devices.

公开(公告)号：US10257006B2

公开(公告)日：2019-04-09

申请号：US15793664

申请日：2017-10-25

Applicant: Marvell World Trade Ltd.

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

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

Abstract: A communication device determines that an extension field should be included in physical layer (PHY) data unit to provide a receiver with more processing time to process data included in the PHY data unit, wherein the extension field is not required to be processed by the receiver. The communication device generates i) a PHY preamble of the PHY data unit, and ii) a PHY data portion of the PHY data unit, the PHY data unit conforming to a first communication protocol. Each orthogonal frequency division multiplexing (OFDM) symbol in the PHY data portion is generated with a first tone spacing, which is a fraction 1/N of a second tone spacing defined by a second communication protocol, wherein N is a positive integer greater than one. The communication device also generates the extension field of the PHY data unit, which is appended to an end of the PHY data portion.

公开(公告)号：US10219274B2

公开(公告)日：2019-02-26

申请号：US15135428

申请日：2016-04-21

Applicant: Marvell World Trade Ltd.

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

IPC: H04W72/04 ,  H04W74/08 ,  H04W24/02 ,  H04W24/08 ,  H04W72/08 ,  H04W84/12

Abstract: Systems and techniques relating to wireless communications are described. A described technique includes sensing a group of channels for a channel contention operation that acquires two or more channels of the group of channels and detects a busy channel of the group of channels; determining a channel bonding indicator based on the channel contention operation; generating a preamble portion of a frame that includes the channel bonding indicator; generating a data portion of the frame, and transmitting the frame to one or more devices. Generating the preamble portion can include duplicating a legacy preamble on each of the acquired channels within the preamble portion. Generating the data portion can include setting first subcarriers that correspond to the acquired channels to data values, and setting second subcarriers that correspond to the busy channel to null values for at least a portion of the data portion of the frame.

公开(公告)号：US10218822B2

公开(公告)日：2019-02-26

申请号：US15017385

申请日：2016-02-05

Applicant: Marvell World Trade Ltd.

Inventor： Hongyuan Zhang ,  Yakun Sun ,  Mingguang Xu

IPC: H04L27/26 ,  H04L29/06 ,  H04W84/12 ,  H04L5/00

Abstract: A first communication device generates a physical layer (PHY) preamble for a PHY data unit that conforms to a first communication protocol. A first portion of the PHY preamble is generated to include a first signal field having a length subfield that indicates a length of the PHY data unit, A second signal field is generated, and the second signal field and a duplicate of the second signal field are included in the PHY preamble. The PHY preamble is formatted such that the first portion of the PHY preamble is decodable by any second communication device that conforms to a second communication protocol, but does not conform to the first communication protocol, to determine a duration of the PHY data unit based on the length subfield in the first portion of the PHY preamble. The first communication device generates the PHY data unit to include the PHY preamble.

公开(公告)号：US10201017B2

公开(公告)日：2019-02-05

申请号：US15096098

申请日：2016-04-11

Applicant: Marvell World Trade Ltd.

Inventor： Yakun Sun ,  Hongyuan Zhang

IPC: H04W72/04 ,  H04W74/08 ,  H04L5/00 ,  H04W8/24 ,  H04W52/50 ,  H04W74/00

Abstract: A first communication device generates a trigger frame to trigger a contention-based uplink orthogonal frequency multiple access (OFDMA) transmission by multiple second communication devices. The trigger frame may be configured to indicate a predetermined length of the contention-based uplink OFDMA transmission, where the predetermined length corresponds to contention-based uplink OFDMA transmissions. The first communication device transmits the trigger frame to the multiple second communication devices, receives the contention-based uplink OFDMA transmission. The contention-based uplink OFDMA transmission may be of the predetermined length.

公开(公告)号：US10142067B2

公开(公告)日：2018-11-27

申请号：US14688859

申请日：2015-04-16

Applicant: Marvell World Trade Ltd.

Inventor： Rui Cao ,  Xiayu Zheng ,  Hongyuan Zhang

IPC: H04L5/14 ,  H04L5/00 ,  H04B7/12 ,  H04L27/26

Abstract: A physical layer (PHY) data unit is received via an orthogonal frequency division multiplexing (OFDM) communication channel. The PHY data unit includes (i) a first set of one or more short OFDM symbols generated using a normal tone spacing and (ii) a second set of one or more long OFDM symbols generated using a reduced tone spacing, (iii) an OFDM symbol indicator indicative of a number of OFDM symbols in at least one of (a) the first set of OFDM symbols and (b) the second set of OFDM symbols; Based at least in part on the OFDM symbol indicator, (i) a number of short OFDM symbols in the set of one or more short OFDM symbols and (ii) a number of long OFDM symbols in the set of one or more long OFDM symbols are determined.

公开(公告)号：US10098119B2

公开(公告)日：2018-10-09

申请号：US15337668

申请日：2016-10-28

Applicant: Marvell World Trade Ltd.

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

IPC: H04W4/00 ,  H04W72/04 ,  H04L5/00 ,  H04B7/0452 ,  H04L27/26 ,  H04W84/12

Abstract: A first communication device generates a multi-user (MU) physical layer (PHY) data unit having independent data for multiple second communication devices. The first communication device also generates respective control frames to prompt second communication devices to transmit an orthogonal frequency division multiple access (OFDMA) PHY data unit to acknowledge that the second communication devices received the MU PHY data unit. The MU PHY data unit and the respective control frames are transmitted to the multiple second communication devices. The first communication device receives the OFDMA PHY data unit from at least some of the second communication devices. The first communication device processes the OFDMA PHY data unit to determine whether the multiple second communication devices received the MU PHY data unit.

公开(公告)号：US20180262951A1

公开(公告)日：2018-09-13

申请号：US15916940

申请日：2018-03-09

Applicant: Marvell World Trade Ltd.

Inventor： Jinjin Jiang ,  Liwen Chu ,  Hongyuan Zhang ,  Hui-Ling Lou

IPC: H04W28/06 ,  H04L12/805 ,  H04L1/00 ,  H04L12/801

Abstract: Embodiments described herein provide a method for fragmenting and reassembling data frames on a medium access control (MAC) layer in a wireless local area network. A datagram is received from an application running on a first network device, for transmission over a wireless communication link in the wireless local area network. A negotiation request is initiated with a second network device for determining whether both the first network device and the second network device have enhanced directional multi-gigabit capability (EMDG) for data segmentation and reassembly. When both devices have EMDG capability and the size of the datagram exceeds the maximum size defined by the wireless local area network transmission protocol, the datagram is segmented into a plurality of transmission data units on the MAC layer.

公开(公告)号：US10075318B2

公开(公告)日：2018-09-11

申请号：US15295685

申请日：2016-10-17

Applicant: Marvell World Trade Ltd.

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

IPC: H04B7/06 ,  H04L27/26 ,  H04W4/08 ,  H04L5/00 ,  H04W72/08 ,  H04B17/318 ,  H04B17/336 ,  H04W72/04 ,  H04W84/12

CPC classification number: H04L27/2646 ,  H04B7/0632 ,  H04B17/318 ,  H04B17/336 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0094 ,  H04W4/08 ,  H04W72/0453 ,  H04W72/08 ,  H04W72/082 ,  H04W84/12

Abstract: A first communication device receives sounding feedback packets from a plurality of second communication devices, wherein each sounding feedback packet includes one or more channel quality indicators (CQIs) corresponding to one or more groups of orthogonal frequency division multiplexing (OFDM) subcarriers associated with the corresponding second communication device. The first communication device selects a group of second communications devices, based on the received one or more CQIs, for orthogonal frequency division multiple access (OFDMA) communication. The first communication device transmits at least one OFDMA data unit that includes respective data directed to two or more second communication devices of the group, where the respective data are transmitted via respective groups of subcarriers that were allocated to the two or more second communication devices of the group by the first communication device using the received CQIs.