公开(公告)号：US10285202B2

公开(公告)日：2019-05-07

申请号：US15178307

申请日：2016-06-09

Applicant: MARVELL WORLD TRADE LTD.

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

IPC: H04W24/10 ,  H04W74/00 ,  H04W74/08 ,  H04W84/12 ,  H04W88/10

Abstract: A first communication device determines whether the first communication device is to use a first channel access mode or a second channel access mode for accessing a communication channel when the first communication device is triggered for uplink transmission by a second communication device. The first communication device receives a trigger frame from the second communication device. The first communication device transmits, to the second communication device, a data unit triggered by the trigger frame, including using the determined one of the first channel access mode or the second channel access mode to gain access to the communication channel.

公开(公告)号：US20190104513A1

公开(公告)日：2019-04-04

申请号：US16149825

申请日：2018-10-02

Applicant: Marvell World Trade Ltd.

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

IPC: H04W72/04 ,  H04W28/06 ,  H04W74/08

Abstract: Embodiments described herein provide a method for establishing multi-user operation with duplex medium access control in a wireless local area network. Specifically, a trigger frame is transmitted to one or more client stations in a wireless local area network. In response to transmitting the trigger frame, one or more uplink data packets are received from the one or more client stations. It is then determined whether the one or more client stations support duplex operation. A downlink data packet configured in a multi-user data format is transmitted to at least one destined client station that supports duplex operation while simultaneously receiving the one or more uplink data packets from the one or more client stations.

公开(公告)号：US20190089503A1

公开(公告)日：2019-03-21

申请号：US16170891

申请日：2018-10-25

Applicant: Marvell World Trade Ltd.

Inventor： Hongyuan Zhang ,  Sudhir Srinivasa

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

CPC classification number: H04L5/0048 ,  H04L5/0053 ,  H04L27/2613 ,  H04W84/12

Abstract: A method for transmitting an 802.11ah packet is provided. A training field sequence is generated using control circuitry. A preamble for a packet is generated using the control circuitry. The preamble includes a training field symbol which includes the training field sequence. A portion of the training field sequence is within a plurality of guard tones of the training field symbol. The preamble is transmitted using transmit circuitry.

公开(公告)号：US10153930B2

公开(公告)日：2018-12-11

申请号：US15647918

申请日：2017-07-12

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Hongyuan Zhang ,  Hui-Ling Lou ,  Su Khiong Yong

IPC: H04J11/00 ,  H04L27/26 ,  H04L1/00 ,  H04W52/28 ,  H04W84/12

Abstract: A communication device encodes a plurality of information bits to generate a plurality of encoded bits, and maps the plurality of encoded bits to a plurality of constellation symbols, including mapping each bit to multiple constellation symbols. The communication device generates a plurality of orthogonal frequency division multiplexing (OFDM) symbols corresponding to a physical layer (PHY) data unit using the plurality of constellation symbols, wherein the OFDM symbols are generated such that: the OFDM symbols have a tone spacing that is ¼ of a tone spacing of a legacy wireless communication protocol, and the OFDM symbols span only a subband of a 20 MHz communication channel. The communication device generates a transmission signal using the plurality of OFDM symbols, the transmission signal spanning only the subband of the 20 MHz communication channel.

公开(公告)号：US10135572B2

公开(公告)日：2018-11-20

申请号：US14846280

申请日：2015-09-04

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Hongyuan Zhang ,  Sudhir Srinivasa ,  Rohit U. Nabar ,  Raja Banerjea

IPC: H04J3/16 ,  H04L1/00 ,  H04W84/02 ,  H03M13/09 ,  H03M13/00 ,  H04L5/00

Abstract: In a method for generating a data unit conforming to a first communication protocol, a first field and a second field to be included in a preamble of the data unit are generated. The first field includes a first set of one or more information bits that indicate a duration of the data unit and is formatted such that the first field allows a receiver device that conforms to a second communication protocol to determine the duration of the data unit. The second field includes a second set of one or more information bits that indicate to a receiver device that conforms to the first communication protocol that the data unit conforms to the first communication protocol. The first field and the second field are modulated using a modulation scheme specified for a field corresponding to the first field and the second field, respectively, by the second communication protocol.

公开(公告)号：US10033563B2

公开(公告)日：2018-07-24

申请号：US15075823

申请日：2016-03-21

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Hongyuan Zhang

IPC: H04L27/26 ,  H04W84/12

Abstract: A wireless network interface device selects a guard interval from a set of guard intervals including a first guard interval, a second guard interval, and a third guard interval, where in the first guard interval has a length that is 50% of a length of the second guard interval, and wherein the length of the second guard interval is 50% of a length of the third guard interval. The wireless network interface device generates a preamble of a data unit to include: a legacy signal field, a repetition of the legacy field, and a non-legacy field that includes a field that indicates the selected guard interval. The wireless network interface device generates a data portion of the data unit, including generating orthogonal frequency division multiplexing (OFDM) symbols of the data portion using the selected guard interval.

公开(公告)号：US10027449B2

公开(公告)日：2018-07-17

申请号：US14956947

申请日：2015-12-02

Applicant: MARVELL WORLD TRADE LTD.

Inventor： Yakun Sun ,  Hongyuan Zhang ,  Liwen Chu ,  Lei Wang ,  Jinjing Jiang ,  Mingguang Xu

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

Abstract: A first signal field to be included in a preamble of a physical layer (PHY) data unit is generated. The first signal field includes formatting information for a second signal field to be included in the PHY data unit. The formatting information includes an indication of a number of orthogonal frequency division multiplexing (OFDM) symbols in the second signal field. The second signal field is generated according to the formatting information in the first signal field. The second signal field includes formatting information for a data portion of the PHY data unit. The data portion is generated according to the formatting information in the second signal field. The preamble is generated to include at least the first signal field and the second signal field, The PHY data unit is generated to include the preamble and the data portion.

公开(公告)号：US10021224B2

公开(公告)日：2018-07-10

申请号：US15372146

申请日：2016-12-07

Applicant: Marvell World Trade Ltd.

Inventor： Yakun Sun ,  Hongyuan Zhang ,  Liwen Chu ,  Lei Wang

IPC: H04L29/08 ,  H04L5/00 ,  H04L29/06 ,  H04W72/04 ,  H04L1/00 ,  H04W74/06 ,  H04W84/12

CPC classification number: H04L69/324 ,  H04L1/0029 ,  H04L1/003 ,  H04L1/16 ,  H04L5/0007 ,  H04L5/0048 ,  H04L5/0053 ,  H04L5/0094 ,  H04L69/22 ,  H04L69/323 ,  H04W72/044 ,  H04W74/06 ,  H04W84/12

Abstract: A first communication device receives, from a second communication device, a trigger frame. The first communication device generates a single-user (SU) physical layer (PHY) protocol data unit that includes a PHY protocol payload, wherein the PHY protocol payload include information other than information that acknowledges a previous transmission from the second communication device. In response to the trigger frame, the first communication device transmits the SU PHY protocol data unit to the second communication device, such that the SU PHY protocol data unit is transmitted prior to the first communication device transmitting any other PHY protocol data unit after receiving the trigger frame.

公开(公告)号：US10014992B2

公开(公告)日：2018-07-03

申请号：US15702812

申请日：2017-09-13

Applicant: Marvell World Trade Ltd.

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

IPC: H04L1/00 ,  H04L5/00 ,  H04L25/12 ,  H04L27/26 ,  H04W84/12 ,  H04L27/12

CPC classification number: H04L5/0007 ,  H04L1/0042 ,  H04L1/0059 ,  H04L5/0044 ,  H04L27/12 ,  H04L27/2613 ,  H04W84/12

Abstract: A method for generating a physical layer (PHY) data unit includes generating a first signal field to include multiple copies of first signal field content, wherein the first signal field content spans one sub-band of a plurality of sub-bands of the PHY data unit, and wherein the multiple copies collectively span the plurality of sub-bands of the PHY data unit; generating a second signal field to include multiple copies of second signal field content, wherein the second signal field content spans multiple ones of the plurality of sub-bands of the PHY data unit, and wherein the multiple copies of the second signal field collectively span the plurality of sub-bands of the PHY data unit; generating a preamble of the PHY data unit to include at least the first signal field and the second signal field; generating the PHY data unit to include at least the preamble.

公开(公告)号：US10014917B2

公开(公告)日：2018-07-03

申请号：US15380795

申请日：2016-12-15

Applicant: Marvell World Trade Ltd.

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

IPC: H04B7/04 ,  H04W28/02 ,  H04W72/12 ,  H04B7/0452 ,  H04L5/00 ,  H04W72/04 ,  H04W84/12

CPC classification number: H04B7/0452 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0053 ,  H04L5/0091 ,  H04W28/0231 ,  H04W72/0413 ,  H04W72/0446 ,  H04W72/121 ,  H04W72/1289 ,  H04W84/12

Abstract: In a method for communicating in a wireless communication network a trigger frame is generated to trigger simultaneous uplink transmissions by multiple communication devices. The trigger frame includes a padding portion having a length determined based on respective time duration requirements of the multiple communication devices, the respective time duration requirements for preparing uplink transmission by the corresponding second communication devices. The trigger frame is transmitted to the multiple communication devices. The simultaneous uplink transmissions, triggered by the trigger frame, are received from the multiple communication devices.