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

IPC: H04W56/00 ,  H04W72/04 ,  H04W52/02 ,  H04L27/12 ,  H04W84/12

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.

公开(公告)号：US20180084501A1

公开(公告)日：2018-03-22

申请号：US15708507

申请日：2017-09-19

Applicant: Marvell World Trade Ltd.

Inventor： Hua Mu ,  Rui Cao ,  Hongyuan Zhang

IPC: H04W52/02 ,  H04L27/12 ,  H04L12/24 ,  H04L5/00 ,  H04L29/08

Abstract: Embodiments described herein provide a method for transmitting a wake-up radio signal to low power devices in a wireless local area network. Data for transmission to a wireless device is received at a wireless access point, and a wake-up radio packet is generated. The wake-up signal includes a first preamble, a second preamble, and payload data including a wake-up user identifier assigned to the wireless device. The wake-up radio packet is encoded into an encoded wake-up radio frame including a plurality of encoded data symbols representing modulated payload data. The encoded wake-up radio frame is modulated onto a modulated waveform for transmission. A signal corresponding to the modulated waveform is transmitted to the wireless device.

公开(公告)号：US10716067B2

公开(公告)日：2020-07-14

申请号：US15708507

申请日：2017-09-19

Applicant: Marvell World Trade Ltd.

Inventor： Hua Mu ,  Rui Cao ,  Hongyuan Zhang

IPC: H04W52/02 ,  H04L27/26 ,  H04L12/28 ,  H04W68/00 ,  H04L12/24 ,  H04L29/08 ,  H04L27/04 ,  H04L5/00 ,  H04L27/12 ,  H04W84/12 ,  H04W88/08

Abstract: Embodiments described herein provide a method for transmitting a wake-up radio signal to low power devices in a wireless local area network. Data for transmission to a wireless device is received at a wireless access point, and a wake-up radio packet is generated. The wake-up signal includes a first preamble, a second preamble, and payload data including a wake-up user identifier assigned to the wireless device. The wake-up radio packet is encoded into an encoded wake-up radio frame including a plurality of encoded data symbols representing modulated payload data. The encoded wake-up radio frame is modulated onto a modulated waveform for transmission. A signal corresponding to the modulated waveform is transmitted to the wireless device.

公开(公告)号：US10541796B2

公开(公告)日：2020-01-21

申请号：US16001648

申请日：2018-06-06

Applicant: Marvell World Trade Ltd.

Inventor： Hua Mu ,  Hongyuan Zhang ,  Rui Cao ,  Xiayu Zheng ,  Sergey Timofeev

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

Abstract: A communication device generates: i) a physical layer (PHY) preamble of a PHY protocol data unit (PPDU), ii) a first portion of a PHY data payload of the PPDU, and iii) a second portion of the PHY data payload. The PHY preamble includes a first training field, and one or more second training fields. The first portion of the PHY data payload and the second portion of the PHY data payload include a plurality of first orthogonal frequency division multiplexing (OFDM) symbols. Each of multiple first OFDM symbols has a first duration. The communication device generates a PHY midamble of the PPDU to be included between the first and second portions of the PHY data payload. The PHY midamble includes one or more third training fields, each including a respective second OFDM symbol having a second duration shorter than the first duration.

公开(公告)号：US10701632B2

公开(公告)日：2020-06-30

申请号：US16030264

申请日：2018-07-09

Applicant: Marvell World Trade Ltd.

Inventor： Hua Mu ,  Rui Cao ,  Xiayu Zheng ,  Hongyuan Zhang

IPC: H04W52/02 ,  H04L27/26 ,  H04L25/03 ,  H04W84/12

Abstract: A first communication device generates and transmits a wakeup packet configured to cause a wakeup radio of a second communication device to prompt a wireless local area network (WLAN) network interface device of the second communication device to transition from a low power state to an active state. The wakeup packet is generated to include i) a WLAN legacy preamble, ii) a wakeup radio (WUR) preamble, and iii) a data portion. The data portion comprises a plurality of time segments, each time segment corresponds to a respective information bit. The data portion is generated to include a respective prefix inserted prior to each time segment corresponding to the respective bit to mitigate intersymbol interference at a receiver caused at least by multipath effects.