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    System and method for a CSMA-CA half window scheme
    42.
    发明授权
    System and method for a CSMA-CA half window scheme 有权

    公开(公告)号：US09622265B2

    公开(公告)日：2017-04-11

    申请号：US14309521

    申请日：2014-06-19

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Sheng Sun ,  Jung Hoon Suh

    IPC: H04W74/08 ,  H04W84/12

    CPC classification number: H04W74/0816 ,  H04W84/12

    Abstract: Embodiments are provided for implementing a CSMA-CA half window scheme in 802.11 networks or other suitable wireless networks that could benefit from such scheme. The half window scheme improves a back-off time calculation by adding a probability prediction factor. The back-off time is part of a delay time in accessing a wireless transmission medium by a station (STA). The probability prediction factor is used to adjust a contention widow (CW) used to calculate the back-off time, based on the STA's medium access probability. The STA splits the CW into two at least half windows and then chooses one of the windows according to the window's information gain for the probability prediction. The selected window is used to select a random number for the back-off time. The improved back-off time calculation reduces contention between STAs in accessing the medium.

    Fast authentication for inter-domain handovers
    43.
    发明授权
    Fast authentication for inter-domain handovers 有权
    域间切换的快速身份验证

    公开(公告)号：US09264900B2

    公开(公告)日：2016-02-16

    申请号：US14218567

    申请日：2014-03-18

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Sheng Sun ,  Osama Aboul-Magd ,  Kwok Shum (Edward) Au ,  Junghoon Suh ,  Alex Stephenne

    IPC: H04M1/66 ,  H04W12/06 ,  H04W36/00 ,  H04W12/04

    CPC classification number: H04W12/06 ,  H04L9/0844 ,  H04L2209/42 ,  H04L2209/80 ,  H04W12/04 ,  H04W36/0038 ,  H04W36/14

    Abstract: Fast mobile device authentication can be achieved during inter-domain handovers between administrative domains operating under a federated service agreement using pseudonym identifications (PID). Specifically, the mobile device may derive a PID when obtaining authentication in a first wireless network, and then use the PID to obtain fast authentication in a second wireless network. The PID may be generated during an Elliptic curve Diffie-Hellman (ECDH) authentication procedure using public keys associated with the mobile device and the first wireless network. The PID (or a derivative thereof) may then be provided to an authentication server in a second wireless network for validation. The PID may be validated by the second authentication server via online or offline validation procedures. The PID can also be used as an electronic coupon for accessing the second network.

    Abstract translation: 在使用假名识别（PID）的联合服务协议下运行的管理域之间的域间切换期间，可以实现快速移动设备认证。 具体地，当在第一无线网络中获得认证时，移动设备可以导出PID，然后使用PID在第二无线网络中获得快速认证。 可以在使用与移动设备和第一无线网络相关联的公钥的椭圆曲线Diffie-Hellman（ECDH）认证过程期间生成PID。 然后可以将PID（或其导数）提供给第二无线网络中的认证服务器以进行验证。 PID可以由第二认证服务器通过在线或离线验证过程来验证。 PID也可以用作访问第二个网络的电子优惠券。

    Dual-Stream Signal (SIG) Field Encoding with Higher Order Modulation
    44.
    发明申请
    Dual-Stream Signal (SIG) Field Encoding with Higher Order Modulation 有权
    双流信号（SIG）字段编码与高阶调制

    公开(公告)号：US20150215818A1

    公开(公告)日：2015-07-30

    申请号：US14677356

    申请日：2015-04-02

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Jung Hoon Suh ,  Kwok Shum Au ,  Osama Aboul-Magd ,  Sheng Sun

    IPC: H04W28/06 ,  H04L5/00 ,  H04L27/20 ,  H04L1/06

    CPC classification number: H04W28/065 ,  H04L1/0643 ,  H04L5/0023 ,  H04L27/20 ,  H04L27/2602 ,  H04L27/2613 ,  H04W84/12

    Abstract: Signal (SIF) field capacity can be significantly increased by encoding SIG field data using two streams in accordance with a space-time block code (STBC) encoding scheme. Dual-stream SIG field encoding allows for the utilization of higher order modulation schemes, such as quadrature phase-shift keying (QPSK), which increases SIG field capacity. Dual-stream encoded SIG fields are transmitted using an omnidirectional beam to allow mobile stations to accurately decode the SIG field irrespective of their spatial location.

    Abstract translation: 根据空时块码（STBC）编码方案，通过使用两个流编码SIG场数据可以显着增加信号（SIF）场容量。 双流SIG字段编码允许利用诸如正交相移键控（QPSK）的更高阶调制方案，这增加了SIG场容量。 双流编码的SIG字段使用全向光束传输，以允许移动台准确地解码SIG字段，而不考虑它们的空间位置。

    BCC puncturing patterns for data retransmission in wireless network
    46.
    发明授权
    BCC puncturing patterns for data retransmission in wireless network 有权

    公开(公告)号：US11239948B2

    公开(公告)日：2022-02-01

    申请号：US16809347

    申请日：2020-03-04

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Jung Hoon Suh ,  Yan Xin ,  Osama Aboul-Magd ,  Sheng Sun

    IPC: H04L1/00 ,  H04L1/24 ,  H04W84/12

    Abstract: Transmitting, in a wireless local area network (WLAN), a second punctured coded bit sequence generated by puncturing coded data using a second puncturing pattern, wherein the coded data has previously been punctured using a first puncturing pattern to generate a first punctured coded bit sequence transmitted in the WLAN. The second puncturing pattern is different than the first puncturing pattern to cause at least some bits of the coded data that were omitted in the first punctured coded bit sequence to be included in the second punctured coded bit sequence.

    Systems and methods for interference alignment in Wi-Fi
    49.
    发明授权
    Systems and methods for interference alignment in Wi-Fi 有权

    公开(公告)号：US10299280B2

    公开(公告)日：2019-05-21

    申请号：US14961602

    申请日：2015-12-07

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Jung Hoon Suh ,  Osama Aboul-Magd ,  Kwok Shum Au ,  Sheng Sun

    IPC: H04W72/08 ,  H04W72/12 ,  H04B7/06 ,  H04L1/00 ,  H04L25/02 ,  H04L27/26 ,  H04W84/12

    Abstract: System and method embodiments are provided for interference alignment in a wireless local area network (LAN) with an overlapping basic service set (OBSS). In an embodiment, a method includes instructing a first access point (AP) in the wireless LAN to broadcast a null data packet (NDP) sounding packet to a plurality of stations when no other AP is broadcasting, wherein the NDP sounding packet comprises a plurality of long training field (LTFs), and wherein a total number of LTFs is equal to a total number of transmission streams, receiving channel beamforming (BF) information and a signal plus interference to noise ratio (SINR) from each of the stations, wherein each of the stations computes the channel BF information and the SINR from sounding packets received from each of the APs in the wireless LAN, and determining a transmission schedule according to the SINRs and the channel BF information.

    System and method for preambles in a wireless communications network
    50.
    发明授权
    System and method for preambles in a wireless communications network 有权

    公开(公告)号：US10285091B2

    公开(公告)日：2019-05-07

    申请号：US15643253

    申请日：2017-07-06

    Applicant: Huawei Technologies Co., Ltd.

    Inventor： Jung Hoon Suh ,  Yunbo Li ,  Kwok Shum Au ,  Osama Aboul-Magd ,  Sheng Sun

    IPC: H04W28/06 ,  H04B7/06 ,  H04L5/00 ,  H04L27/26 ,  H04L29/06 ,  H04W84/12

    Abstract: A method for transmitting a frame includes generating an omni portion of the frame, the omni portion including a non-beamformed long training field and a signal field, the non-beamformed long training field including channel estimation information used to decode the signal field, the non-beamformed long training field configured to be transmitted through one of multiple antennas and multiple streams. The method also includes generating a multi-stream portion of the frame, the multi-stream portion including a data field and a multi-stream long training field, the multi-stream long training field including station-specific decoding information for station-specific data in the data field. The method further includes applying a beamforming indicator to the signal field of the omni portion, and transmitting the frame.

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