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    Preamble Designs For Next-Generation WLAN In 60GHz Band
    21.
    发明公开
    Preamble Designs For Next-Generation WLAN In 60GHz Band 审中-公开

    公开(公告)号：US20230318891A1

    公开(公告)日：2023-10-05

    申请号：US18127680

    申请日：2023-03-29

    Applicant: MediaTek Inc.

    Inventor： Shengquan Hu ,  Jianhan Liu ,  Thomas Edward Pare, JR.

    IPC: H04L27/26

    CPC classification number: H04L27/2603 ,  H04L27/2613

    Abstract: Techniques pertaining to preamble designs for next-generation wireless local area networks (WLANs) in 60 GHz band are described. A first apparatus communicates in a 60 GHz band wirelessly with a second apparatus by transmitting a first physical-layer protocol data unit (PPDU) to the second apparatus and/or receiving a second PPDU from the second apparatus. Each of the first PPDU and the second PPDU and a respective preamble thereof are either with or without at least partial backward compatibility with one or more preexisting PPDU formats and preambles.

    Multi-user (MU) wake-up signal transmission by using FDMA scheme in WLAN
    24.
    发明授权
    Multi-user (MU) wake-up signal transmission by using FDMA scheme in WLAN 有权

    公开(公告)号：US10470125B2

    公开(公告)日：2019-11-05

    申请号：US15852548

    申请日：2017-12-22

    Applicant: MEDIATEK INC.

    Inventor： Jianhan Liu ,  Thomas Edward Pare, Jr. ,  Keng Leong Fong

    IPC: H04W52/02 ,  H04L27/10 ,  H04W74/00 ,  H04W84/12

    Abstract: Systems and methods of transmitting a multi-user (MU) wake-up packet in WLAN including wake-up signals to activate main radios on multiple communication devices via the wake-up radios (WURs). In the multi-user wake-up packet, a frequency channel can be divided into several sub-channels for transmitting multiple wake-up signals in FDMA. Each wake-up signal is modulated in ON/OFF Key modulation. Two adjacent wake-up signals are adequately spaced apart by a certain frequency spacing to reduce adjacent channel interferences. Once a WUR on a receive device receives the packet, it generates a wake-up indication to wake up the main radio for active data communication. The MU wake-up packet may also include a sequence of multiple wake-up signals transmitted using the same sub-channel and cascaded in a time-domain. A reconfiguration window may be inserted between consecutive wake-up signals on the same sub-channel, and between a legacy preamble and the following wakeup signals.

    Low PAPR dual sub-carrier modulation scheme for BPSK in WLAN
    26.
    发明授权
    Low PAPR dual sub-carrier modulation scheme for BPSK in WLAN 有权

    公开(公告)号：US10225122B2

    公开(公告)日：2019-03-05

    申请号：US15422755

    申请日：2017-02-02

    Applicant: MEDIATEK INC.

    Inventor： Gary A. Anwyl ,  Jianhan Liu ,  Tianyu Wu ,  Thomas Edward Pare, Jr.

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

    Abstract: Dual sub-carrier modulation (DCM) is introduced in high efficiency (HE) WLAN. DCM is a solution to deal with narrow band interferences and for range extension. DCM can introduce frequency diversity into OFDM systems by transmitting the same information on two subcarriers separated in frequency. If DCM is applied, then the transmitter modulates the same encoded bits onto two separated subcarriers with the same or different constellation mapping schemes. DCM suffers from a high peak-to-average power ratio (PAPR). In accordance with one novel aspect, a method of transmitting and encoding a HE PPDU frame with binary phase shift keying (BPSK) DCM and lower PAPR is proposed.

    Method and electronic apparatus for automatically detecting bandwidth and packet type of packet
    27.
    发明授权
    Method and electronic apparatus for automatically detecting bandwidth and packet type of packet 有权

    公开(公告)号：US10003488B2

    公开(公告)日：2018-06-19

    申请号：US15060624

    申请日：2016-03-04

    Applicant: MEDIATEK INC.

    Inventor： Chien-Fang Hsu ,  Jianhan Liu

    IPC: H04L27/26 ,  H04L27/00

    CPC classification number: H04L27/2666 ,  H04L27/0012 ,  H04L27/2613

    Abstract: The present invention provides a method and an electronic apparatus for automatically detecting bandwidth and the packet type of a packet, so as to solve the problem mentioned above. The method comprises: detecting a plurality of symbols in the preamble of the packet; generating a sign pattern according to the symbols; and determining the bandwidth and the packet type of the packet according to the detected sign pattern. The electronic apparatus comprises: a symbol detecting circuit, a sign pattern generating circuit, and a determining circuit. The symbol detecting circuit is utilized for detecting a plurality of symbols in the preamble of the packet. The sign pattern generating circuit is utilized for generating a sign pattern according to the symbols. The determining circuit is utilized for determining the bandwidth and the packet type of the packet according to the detected sign pattern.

    LDPC Tone Mapping Schemes for Dual-Sub-Carrier Modulation in WLAN
    28.
    发明申请
    LDPC Tone Mapping Schemes for Dual-Sub-Carrier Modulation in WLAN 审中-公开

    公开(公告)号：US20170104553A1

    公开(公告)日：2017-04-13

    申请号：US15290135

    申请日：2016-10-11

    Applicant: MEDIATEK INC.

    Inventor： Jianhan Liu ,  Shengquan Hu ,  Tianyu Wu ,  Thomas Edward PARE, JR.

    IPC: H04L1/00 ,  H04L27/00

    CPC classification number: H04L1/0041 ,  H04L27/0008 ,  H04L27/2601 ,  H04L27/2613 ,  H04L27/2626 ,  H04W72/0453 ,  H04W84/12

    Abstract: A new lower density parity check (LDPC) tone mapper is proposed when DCM is applied for a given resource unit (RU) when LDPC is used as the channel control coding. For HE PPDU transmission with DCM, LDPC encoded streams are first modulated by a DCM constellation mapper. The modulated symbols of the lower half of the frequency segment and the modulated symbols of the upper half of the frequency segment are modulated using the same LDPC encoded bits using DCM mapping. The modulated symbols of the lower half of the frequency segment are mapped to lower half of the data subcarriers using DCM LDPC tone mapper. The modulated symbols of the upper half of the frequency segment are mapped to upper half of the data subcarriers using the same DCM LDPC tone mapper. Maximum frequency diversity for DCM can be achieved.

    METHOD FOR IDENTIFYING SOURCE BSS IN WLAN
    30.
    发明申请
    METHOD FOR IDENTIFYING SOURCE BSS IN WLAN 审中-公开
    WLAN中识别源BSS的方法

    公开(公告)号：US20160353275A1

    公开(公告)日：2016-12-01

    申请号：US15117448

    申请日：2015-02-10

    Applicant: Jianhan Liu ,  Tianyu Wu ,  Thomas Edward Pare Jr. ,  MEDIATEK INC.

    Inventor： Jianhan Liu ,  Tianyu Wu ,  Thomas Edward Pare Jr.

    IPC: H04W8/26 ,  H04L12/823 ,  H04W48/16

    CPC classification number: H04W8/26 ,  H04L47/32 ,  H04W16/10 ,  H04W48/16 ,  H04W84/12

    Abstract: A method for identifying source BSS in WLAN is proposed. A high efficiency (HE) access point (AP) sends a packet containing a basic service set (BSS) color to a HE station. The HE AP also sends a packet containing an assigned association identification (AID) to a very high throughput (VHT) station. The assigned AID comprises at least part of the BSS color information. The VHT station therefore sends a packet containing the at least part of the BSS color information such that any AP or station that receives the packet can determine the BSS the VHT station is in.

    Abstract translation: 提出了一种识别WLAN中源BSS的方法。 高效（HE）接入点（AP）向HE站发送包含基本服务集（BSS）颜色的分组。 HE AP还将包含分配的关联标识（AID）的分组发送到非常高的吞吐量（VHT）站。 分配的AID包括BSS颜色信息的至少一部分。 因此，VHT站发送包含BSS颜色信息的至少一部分的分组，使得接收分组的任何AP或站可以确定VHT站所在的BSS。

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