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1.发明授权公开(公告)号：US11166159B1
公开(公告)日：2021-11-02
申请号：US16005437
申请日：2018-06-11
Applicant: Marvell International Ltd.
Inventor： Christian Raimund Berger , Liwen Chu , Sudhir Srinivasa , Niranjan Grandhe
Abstract: The present disclosure describes methods and apparatuses for secure fine timing measurement (FTM) with encoded long training fields (LTFs). In some aspects, a device transmits an announcement frame for an FTM exchange that includes an indication of encoding. Based on the indication of encoding, an LTF of a first null data packet (NDP) of the FTM exchange is encoded. The device transmits the first NDP having the encoded LTF to another device, and receives, from the other device, a second NDP having an encoded LTF. A round-trip time for the first and second NDPs with encoded LTFs is determined. Based on this round-trip time, a distance between the device and the other device can be determined. By encoding the LTFs of the NDPs of the FTM exchange, third parties can be prevented from spoofing an FTM frame to compromise the FTM exchange and related proximity-based security.
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公开(公告)号：US10928505B1
公开(公告)日：2021-02-23
申请号：US15977643
申请日：2018-05-11
Applicant: Marvell International Ltd.
Inventor： Liwen Chu , Hongyuan Zhang , Hui-Ling Lou
Abstract: A first communication device generates a null data packet (NDP) announcement (NDPA) frame, which indicates that the first communication device will transmit a first NDP after transmitting the NDPA frame, and which includes information that indicates the NDPA frame is part of a ranging measurement exchange session. The first communication device transmits the NDPA frame as part of the ranging measurement exchange session, and transmits the first NDP after transmitting the NDPA frame. The first communication device receives a second NDP from a second communication device as part of the ranging measurement exchange session, and receives a feedback packet from the second communication device as part of the ranging measurement exchange session. The feedback packet includes feedback information regarding the ranging measurement exchange session.
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公开(公告)号：US10764855B1
公开(公告)日：2020-09-01
申请号：US16262616
申请日：2019-01-30
Applicant: Marvell International Ltd.
Inventor： Liwen Chu , Hongyuan Zhang , Hui-Ling Lou
Abstract: A first communication device includes a first timer and a second communication device includes a second timer. The first communication device receives, from the second communication device, a packet that includes a timestamp that corresponds to a least significant portion of the second timer. The first communication device determines whether a most significant bit of a least significant portion of the first timer is different than a most significant bit of the timestamp. At least when the most significant bit of the least significant portion of the first timer is different than the most significant bit of the timestamp: the first communication device determines a mathematical difference between i) the least significant portion of the first timer and ii) the timestamp, and selectively adjusts a most significant portion of the first timer based on the mathematical difference. The first communication device uses the timestamp to set the least significant portion of the first timer.
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公开(公告)号：US10484980B1
公开(公告)日：2019-11-19
申请号：US15488281
申请日：2017-04-14
Applicant: Marvell International Ltd.
Inventor： Jinjing Jiang , Liwen Chu , Lei Wang , Yakun Sun , Hongyuan Zhang , Hui-Ling Lou
Abstract: Systems, devices, and techniques relating to a link layer service platform (LSP) that provides, among other things, assisted multi-band wireless communications are described. A described device includes a first radio to transmit and receive based on a first wireless protocol; a second radio to transmit and receive based on a second wireless protocol, the second wireless protocol being different from the first wireless protocol; and a controller to use the first radio to assist communications via the second radio. The controller can be configured to cause the first radio to transmit, receive, or both one or more control frames associated with the second wireless protocol using the first wireless protocol, and cause the second radio to transmit or receive one or more data frames using the second wireless protocol in accordance with the one or more control frames.
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公开(公告)号：US10454798B1
公开(公告)日：2019-10-22
申请号：US15376267
申请日：2016-12-12
Applicant: Marvell International Ltd.
Inventor： Yakun Sun , Hongyuan Zhang , Liwen Chu , Sudhir Srinivasa
IPC: H04L12/26 , H04L12/841 , H04L5/00 , H04L12/18
Abstract: A method for adjusting an arrival time of a first orthogonal frequency division multiplex (OFDM) data unit of an uplink multi-user (MU) data unit is described. Respective round trip times (RTTs) are determined by a first communication device for multiple communication devices that communicate with the first communication device. A first time offset for a second communication device of the multiple communication devices is determined by the first communication device based on the respective RTTs. The first OFDM data unit is to be transmitted by the second communication device. A first timing control message that indicates the first time offset is generated by the first communication device. The first timing control message is caused by the first communication device to be transmitted to the second communication device.
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Patent Agency Ranking
公开(公告)号：US10306704B1
公开(公告)日：2019-05-28
申请号：US15589774
申请日：2017-05-08
Applicant: Marvell International Ltd.
Inventor： Lei Wang , Liwen Chu , Jinjin Jiang , Hongyuan Zhang , Hui-Ling Lou
Abstract: Aspects of the disclosure provide an apparatus for wireless communication. The apparatus includes a transceiver and a processing circuit. The transceiver is configured to transmit and receive wireless signals. The processing circuit is configured to detect an error of a previous scheduled transmission of data units from the apparatus to another apparatus. The other apparatus provides scheduled resources for transmission between the two apparatuses. Further, the processing circuit is configured to determine resources that are scheduled by the other apparatus for the apparatus to perform retransmission, and provide one or more of the data units in the previous scheduled transmission to the transceiver for retransmission using the scheduled resources.
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公开(公告)号：US10257328B2
公开(公告)日：2019-04-09
申请号：US15691398
申请日：2017-08-30
Applicant: Marvell International Ltd.
Inventor： Liwen Chu , Sagar A. Tamhane , Hongyuan Zhang , Hui-Ling Lou
Abstract: Aspects of the disclosure provide an apparatus having a processing circuit and a transceiver. The processing circuit is configured to generate a frame to have an extended subtype under a control type, configure a media access control (MAC) header of the frame to indicate an extended control frame format, and configure a field of the frame to be an extended subtype field according to the extended control frame format to carry an identification for the extended subtype. The extended subtype is defined in addition to a plurality of subtypes that are identifiable using a subtype field in the frame according to a control frame format. The transceiver is configured to transmit signals to carry the frame.
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公开(公告)号：US10135582B1
公开(公告)日：2018-11-20
申请号：US14582568
申请日：2014-12-24
Applicant: Marvell International Ltd.
Inventor： Yakun Sun , Hongyuan Zhang , Liwen Chu , Hui-Ling Lou
Abstract: Systems and methods are provided for introducing time diversity in a transmitter. The systems and methods may include receiving, at the transmitter, a request from a receiver to retransmit data. The systems and methods may further include receiving an input of data corresponding to the data requested for retransmission at a first transmitter block. The systems and methods may further include operating on the signals using the first transmitter block in at least one of a first mode and a second mode, such that an output of signals from the first transmitter block is dependent on a time-varying function and corresponds to the data requested by the receiver for retransmission.
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公开(公告)号：US10128966B1
公开(公告)日：2018-11-13
申请号：US15589796
申请日：2017-05-08
Applicant: Marvell International Ltd.
Inventor： Liwen Chu , Lei Wang , Jinjin Jiang , Hongyuan Zhang , Hui-Ling Lou
IPC: H04W74/00 , H04B17/345 , H04W16/02 , H04W52/24 , H04L12/823 , H04W16/10 , H04W84/12 , H04L5/00 , H04L1/00
Abstract: Aspects of the disclosure provide an apparatus for wireless communication. The apparatus includes a transceiver and a processing circuit. The transceiver is configured to transmit and receive wireless signals. The processing circuit is configured to determine a transmission parameter adjustment for the transceiver, detect that the transmission parameter adjustment has a potential to cause a collision to an overlapping basic service set (OBSS), adjust timings for transmission control to avoid the collision, and control the transceiver based on the determined transmission parameter adjustment and the adjusted timings for transmission control.
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公开(公告)号：US10045340B1
公开(公告)日：2018-08-07
申请号：US14961558
申请日：2015-12-07
Applicant: Marvell International Ltd.
Inventor： Liwen Chu , Lei Wang , Jinjing Jiang , Hongyuan Zhang , Hui-Ling Lou
Abstract: A method is carried out on a device capable of utilizing a high efficiency wireless local area network (HEW) communication protocol and a legacy communication protocol, and includes wirelessly receiving a communication frame; when the measured energy level of the frame exceeds a static clear channel assessment (CCA) energy level, identifying the BSS to which the frame corresponds, wherein identifying the BSS to which the frame corresponds comprises utilizing a BSS identifier included in the frame when the frame is an HEW frame or utilizing a MAC address included in the frame when the frame is a legacy frame; when the frame corresponds to the same BSS as the device, processing the frame utilizing the static CCA energy level; and when the frame corresponds to an overlapping OBSS, processing the frame utilizing a dynamic CCA energy level.
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