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公开(公告)号：US11303330B2
公开(公告)日：2022-04-12
申请号：US16700562
申请日：2019-12-02
Applicant: Marvell World Trade Ltd.
Inventor： Rui Cao , Hongyuan Zhang
IPC: H04B7/0417 , H04L5/00 , H04W16/28 , H04B7/0456 , H04B7/06
Abstract: A first communication device transmits a plurality of training signals to a second communication device via a communication channel. The first communication device receives feedback generated at the second communication device based on the plurality of training signals. The feedback includes steering matrix information for a plurality of orthogonal frequency division multiplexing (OFDM) tones and (ii) additional phase information corresponding to channel estimates obtained for the plurality of OFDM tone. The first communication device constructs, based on the steering matrix information, a plurality of steering matrices corresponding to the plurality of OFDM tones, and compensates, using the additional phase information, the plurality of steering matrices to reduce phase discontinuities between the OFDM tones. The first communication device steers, using the compensated steering matrices, at least one transmission via the communication channel to the second communication device.
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公开(公告)号：US11071060B2
公开(公告)日：2021-07-20
申请号：US16176099
申请日：2018-10-31
Applicant: Marvell World Trade Ltd.
Inventor： Rui Cao , Hongyuan Zhang , Sudhir Srinivasa
IPC: H04B7/0413 , H04W52/02 , H04B7/06 , H04B7/04 , H04W84/12
Abstract: Embodiments described herein provide a method for transmitting a wake-up radio packet to low power devices in a wireless local area network. At a wireless access point having a plurality of antennas, data for transmission to one or more lower power wireless devices are received. A wake-up radio packet, including a wake-up data frame, is configured for transmission to the one or more lower power wireless devices. A waveform for transmitting the wake-up radio packet is generated. At each of the plurality of antennas, the waveform is adjusted with spatial mapping to prevent unintentional spatial nulling of the waveform during transmission of the wake-up radio packet. The wake-up radio packet is transmitted, via the plurality of antennas, in a form of the adjusted waveform to the one or more lower power wireless devices prior to transmitting the received data to the one or more lower power wireless devices.
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公开(公告)号：US10986639B2
公开(公告)日：2021-04-20
申请号：US16588395
申请日：2019-09-30
Applicant: Marvell World Trade Ltd.
Inventor： Hongyuan Zhang , Yakun Sun , Hui-Ling Lou , Liwen Chu
Abstract: A first communication device determines assignment of at least a first orthogonal frequency division multiplex (OFDM) tone block and a second OFDM tone block for communication with a second communication device in a wireless local area network (WLAN). The first OFDM tone block is separated from the second OFDM tone block by a gap in frequency. The first communication device generates a physical layer (PHY) data unit for transmission to the second communication device, including generating a data portion of the PHY data unit that spans the first OFDM tone block and the second OFDM tone block. The first communication device transmits the PHY data unit to the second communication device via the first OFDM tone block and the second OFDM tone block such that no data is transmitted in the third OFDM tone block for the data portion of the PHY data unit.
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公开(公告)号：US10772056B2
公开(公告)日：2020-09-08
申请号：US16049732
申请日：2018-07-30
Applicant: Marvell World Trade Ltd.
Inventor： Hari Balakrishnan , Sri Varsha Rottela , Rui Cao , Hongyuan Zhang , Sudhir Srinivasa , Hua Mu , Xiayu Zheng
Abstract: A first communication device generates a first portion and a second portion of a wakeup radio (WUR) wakeup packet. The first portion of the WUR wakeup packet corresponds to a wireless local area network (WLAN) legacy preamble, and spans a first frequency bandwidth. The second portion of the WUR wakeup packet spans a second bandwidth that is less than the first bandwidth, and is configured to cause a WUR of a second communication device to cause a WLAN network interface device of the second communication device to transition from a low power state to the active state. Generating the second portion of the WUR wakeup packet includes i) generating a sync portion having a plurality of sync symbols, and ii) generating a wakeup packet body. The first communication device transmits the WUR wakeup packet.
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公开(公告)号：US10727912B2
公开(公告)日：2020-07-28
申请号：US14955004
申请日：2015-11-30
Applicant: MARVELL WORLD TRADE LTD.
Inventor： Liwen Chu , Hongyuan Zhang , Hui-Ling Lou
IPC: H04B7/212 , H04B7/0452 , H04L1/18 , H04L5/00 , H04W72/12 , H04L1/16 , H04W72/04 , H04W76/40 , H04W84/12 , H04L1/00
Abstract: A communication device of a client uplink group transmits an enhanced request to send (E-RTS) message to an access point of a wireless local area network, wherein the E-RTS message includes i) a length of a TXOP of the communication device and ii) an indication of a data unit size for an uplink MU-MIMO data unit to be transmitted by the communication device simultaneously with transmissions of other members of the client uplink group. The communication device receives a communication frame from the access point, the communication frame including a prompt to transmit an uplink MU-MIMO data unit having the indicated data unit size. The communication device generates the uplink MU-MIMO data unit having the indicated data unit size, and transmits, in response to the communication frame, the uplink MU-MIMO data unit to the access point during the TXOP simultaneously with transmissions of other members of the client uplink group.
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Patent Agency Ranking
公开(公告)号：US10694546B2
公开(公告)日：2020-06-23
申请号：US16132154
申请日：2018-09-14
Applicant: Marvell World Trade Ltd.
Inventor： Liwen Chu , Hongyuan Zhang , Hui-Ling Lou
Abstract: A first communication device receives an indication that a second communication device permits a duplex transmission while the second communication device transmits during a transmit opportunity period (TXOP), where duplex transmissions involve simultaneously transmitting and receiving via a same wireless frequency band. The indication is included in a media access control layer (MAC) protocol data unit (MPDU). In response to receiving the indication that the second communication device permits the duplex transmission, the first communication device determines that the first communication device is permitted to perform the duplex transmission during the TXOP. The first communication device receives a first packet from the second communication device during the TXOP, and transmits a second packet while the first communication device is receiving the first packet.
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公开(公告)号：US10656256B2
公开(公告)日：2020-05-19
申请号：US15947306
申请日：2018-04-06
Applicant: Marvell World Trade Ltd.
Inventor： Liwen Chu , Sagar Tamhane , Hongyuan Zhang , Christian Berger , Niranjan Grandhe , Sudhir Srinivasa , Hui-Ling Lou
Abstract: During a service period (SP) for a ranging measurement signal exchange between a first communication device and one or more second communication devices, the first communication device receives respective first null data packets (NDPs) from the one or more second communication devices, and transmits respective second NDPs to the one or more second communication devices. The first communication device transmits, during the SP, respective first ranging measurement feedback packets to the one or more second communication devices to allow each of the one or more second communication devices to determine a time-of-flight between the first communication device and the second communication device and/or receives, during the SP, respective second ranging measurement feedback packets from the one or more second communication devices to allow the first communication device to determine respective times-of-flight between the first communication device and the one or more second communication devices.
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公开(公告)号：US10581580B2
公开(公告)日：2020-03-03
申请号：US16397722
申请日：2019-04-29
Applicant: Marvell World Trade Ltd.
Inventor： Liwen Chu , Lei Wang , Jinjing Jiang , Hongyuan Zhang , Hui-Ling Lou
IPC: H04L5/00 , H04L1/16 , H04W28/18 , H04B7/0452 , H04L12/851 , H04L27/26 , H04W84/12
Abstract: A first communication device receives an aggregate medium access control data unit (MAC) protocol data unit (A-MPDU) that aggregates multiple MAC protocol data units from a second communication device. The first communication device generates an acknowledgment data unit that includes a length indication that indicates a length of an acknowledgement field and the acknowledgment field of the indicated length. The length of the acknowledgement field is selected from a subset of predetermined lengths, among a set predetermined lengths, that includes multiple predetermined lengths that do not exceed a maximum number of MAC protocol data units that can be included in the A-MPDU. The maximum number of MAC protocol data units is limited by a buffer size negotiated in an acknowledgement setup procedure previously conducted between the first communication device and the second communication device. The first communication device transmits the acknowledgment data unit to the second communication device.
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公开(公告)号：US10567996B2
公开(公告)日：2020-02-18
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: H04J3/24 , H04W28/06 , H04L12/801 , H04L1/00 , H04L12/805
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 (EDMG) for data segmentation and reassembly. When both devices have EDMG 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.
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公开(公告)号：US10560158B2
公开(公告)日：2020-02-11
申请号：US16025273
申请日：2018-07-02
Applicant: Marvell World Trade Ltd.
Inventor： Liwen Chu , Yakun Sun , Hongyuan Zhang , Lei Wang , Hui-Ling Lou
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.
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