知搜-全球专利检索

  1. Login
  2. Sign Up

Search Results

127 records (took 0.036 seconds)

    DATA TRANSMISSION COEXISTENCE WITHIN TELEVISION WHITE SPACE CHANNELS
    41.
    发明申请
    DATA TRANSMISSION COEXISTENCE WITHIN TELEVISION WHITE SPACE CHANNELS 有权
    电视空白通道中的数据传输共存

    公开(公告)号：US20150304148A1

    公开(公告)日：2015-10-22

    申请号：US14258627

    申请日：2014-04-22

    Applicant: Qualcomm Incorporated

    Inventor： Sameer Vermani ,  Santosh Paul Abraham ,  Vincent Knowles Jones, IV ,  Stephen Jay Shellhammer ,  Didier Johannes Richard Van Nee ,  Rahul Tandra ,  Albert Van Zelst

    IPC: H04L27/26 ,  H04W16/14

    CPC classification number: H04L27/2649 ,  H04L5/0048 ,  H04L27/0006 ,  H04L27/2613 ,  H04L27/2634 ,  H04L27/2666 ,  H04W16/14

    Abstract: Methods, systems, and/or devices are provided that permit data transmissions over unused television channels. A method operational in a receiver device, includes monitoring one or more repurposed channels within a television broadcast frequency spectrum for data waveforms, wherein waveforms of different bandwidths coexist within the one or more repurposed channels, and at least a larger waveform has a first bandwidth larger than a channel bandwidth for each repurposed channel. The method also includes receiving a waveform over a repurposed channel from among the one or more repurposed channels, wherein the received waveform has a second bandwidth smaller than the channel bandwidth. The method further includes processing the received waveform by applying a downclocking factor to a clock of the receiver device that causes the receiver device to process the received waveform according to the second bandwidth to obtain a data payload from the received waveform.

    Abstract translation: 提供允许在未使用的电视频道上进行数据传输的方法，系统和/或设备。 一种在接收机设备中操作的方法，包括监测用于数据波形的电视广播频谱内的一个或多个重用信道，其中不同带宽的波形在一个或多个重用信道中共存，并且至少较大的波形具有较大的第一带宽 比每个重用通道的通道带宽。 该方法还包括从一个或多个重新利用的信道中的经重用信道接收波形，其中所接收的波形具有小于信道带宽的第二带宽。 该方法还包括通过对接收机设备的时钟施加降频因子来处理所接收的波形，所述时钟使得接收机设备根据第二带宽处理接收到的波形，以从接收到的波形获得数据有效载荷。

    Spatio-temporal random voting scheme for cognitive networks
    42.
    发明授权
    Spatio-temporal random voting scheme for cognitive networks 有权
    认知网络的时空随机投票方案

    公开(公告)号：US08948744B2

    公开(公告)日：2015-02-03

    申请号：US13916297

    申请日：2013-06-12

    Applicant: QUALCOMM Incorporated

    Inventor： Yong Jin Kim ,  Lakshminath Reddy Dondeti ,  Stephen Jay Shellhammer ,  Wenyi Zhang

    IPC: H04W24/00 ,  H04W72/02 ,  H04W72/08

    CPC classification number: H04W24/00 ,  H04W72/02 ,  H04W72/082 ,  H04W84/18

    Abstract: A spatio-temporal random voting scheme is provided that incorporates location distribution, spatial randomness, and temporal randomness in the collection of information from a plurality of sensing devices within the cognitive network. The region is divided into a plurality of sectors, where each sector is a portion of the region. A subset of sectors is selected from the plurality of sectors in the region to provide spatial randomness. A device is randomly selected from each sector in the subset of sectors to provide additional spatial randomness to the information collection process. Temporal randomness may be introduced by randomly selecting a timeslot within a sensing window period in which devices are to scan a frequency spectrum band to determine if a signal energy above a threshold is detected. Sensing reports are then collected from the selected sensing devices and used to determine whether the frequency spectrum band is available or in use.

    Abstract translation: 提供了一种时空随机投票方案，其包括来自认知网络内的多个感测装置的信息收集中的位置分布，空间随机性和时间随机性。 该区域被分成多个扇区，其中每个扇区是区域的一部分。 从区域中的多个扇区中选择扇区的子集以提供空间随机性。 从扇区子集中的每个扇区随机选择一个设备，以向信息收集过程提供额外的空间随机性。 可以通过在感测窗口周期内随机选择时隙来引入时间随机性，其中设备将扫描频谱带以确定是否检测到高于阈值的信号能量。 然后从所选择的感测装置收集感测报告，并用于确定频谱带是可用还是正在使用。

    Link adaptation protocol in a wireless local area network (WLAN)
    43.
    发明授权
    Link adaptation protocol in a wireless local area network (WLAN) 有权

    公开(公告)号：US12244417B2

    公开(公告)日：2025-03-04

    申请号：US17121642

    申请日：2020-12-14

    Applicant: QUALCOMM Incorporated

    Inventor： Stephen Jay Shellhammer ,  Sameer Vermani ,  Lin Yang ,  Jialing Li Chen ,  Dung Ngoc Doan ,  Bin Tian

    IPC: H04L1/00 ,  H04B7/0452 ,  H04B7/06 ,  H04W24/10 ,  H04W84/12

    Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for a link adaptation protocol in a wireless local area network (WLAN). In one aspect, the link adaptation protocol may be used to select a transmission rate option (such as a modulation and coding scheme (MCS)) for communications from a first WLAN device to a second WLAN device based on wireless channel conditions. This disclosure includes several example message sequences for the link adaptation protocol which can accommodate a variety of uplink or downlink data transmission designs, including single user (SU) and multi-user (MU) transmissions. The example message sequences may be used with orthogonal frequency division multiple access (OFDMA), multiple-input-multiple-output (MIMO), and beamformed transmissions.

    Priority access in a wireless local area network (WLAN)
    44.
    发明授权
    Priority access in a wireless local area network (WLAN) 有权

    公开(公告)号：US12160908B2

    公开(公告)日：2024-12-03

    申请号：US18153159

    申请日：2023-01-11

    Applicant: QUALCOMM Incorporated

    Inventor： George Cherian ,  Alfred Asterjadhi ,  Bin Tian ,  Stephen Jay Shellhammer

    IPC: H04W74/08 ,  H04W4/90 ,  H04W12/06 ,  H04W48/06

    Abstract: This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for priority access on a shared wireless channel. A priority station (STA), an access point (AP), or a network operator may activate a priority access service. The priority access service provides priority access to authorize priority STAs by allowing them to use more aggressive contention parameters for contention-based access of the wireless channel as compared to other STAs. In some implementations, non-priority STAs may be configured with weakened contention parameters to increase or ensure the likelihood that a priority STA will win contention for access to the wireless channel.

    RANGING NULL DATA PACKETS FOR WIDE BANDWIDTH NETWORKS
    45.
    发明公开
    RANGING NULL DATA PACKETS FOR WIDE BANDWIDTH NETWORKS 审中-公开

    公开(公告)号：US20240163059A1

    公开(公告)日：2024-05-16

    申请号：US18054531

    申请日：2022-11-10

    Applicant: QUALCOMM Incorporated

    Inventor： Stephen Jay Shellhammer ,  Bin Tian ,  Alireza Raissinia ,  Yanjun Sun

    IPC: H04L5/00 ,  H03M13/00 ,  H04L69/22

    CPC classification number: H04L5/0053 ,  H03M13/6312 ,  H04L5/0064 ,  H04L69/22

    Abstract: This disclosure provides methods, components, devices and systems for ranging measurement procedures between two wireless devices that communicate in wide bandwidth networks. Some aspects more specifically relate to null data packet (NDP) transmissions via a 320 megahertz (MHz) bandwidth. In some examples, a first wireless device and a second wireless device may participate in a ranging measurement procedure and may exchange one or more NDPs to facilitate distance measurements and one or both of the first wireless device and the second wireless device may indicate that an associated protocol data unit (PDU) is a 320 MHz ranging NDP (e.g., an NDP of a ranging variant associated with a bandwidth of 320 MHz) via one or more bits of the preamble of the PDU. The one or more bits may be included in a universal signal (U-SIG) field of the preamble of the PDU.

    SECURE LONG TRAINING FIELD (LTF)
    48.
    发明申请
    SECURE LONG TRAINING FIELD (LTF) 有权

    公开(公告)号：US20230113177A1

    公开(公告)日：2023-04-13

    申请号：US18065523

    申请日：2022-12-13

    Applicant: QUALCOMM Incorporated

    Inventor： Stephen Jay Shellhammer ,  Bin Tian ,  Alireza Raissinia ,  Youhan Kim

    IPC: H04L27/26 ,  H04L5/00

    Abstract: This disclosure provides methods, devices and systems for generating a secure long training field (LTF). In some implementations, the secure LTF may include a randomized bit sequence that is difficult, if not impossible, to replicate by any device other than the transmitting device and the intended receiving device. For example, the transmitting device may use a block cipher or stream cipher to generate a pseudorandom bit sequence and may select a subset of bits of the pseudorandom bit sequence to be mapped to a sequence of modulation symbols representing an LTF symbol of the secure LTF. More specifically, each of the modulation symbols is mapped to a respective one of a number of subcarriers spanning a bandwidth of the secure LTF. The transmitting device may further transmit a physical layer convergence protocol (PLCP) protocol data unit (PPDU) that includes the secure LTF to the receiving device.

    SCALING AND QUANTIZATION FOR CHANNEL STATE INFORMATION REPORTING
    49.
    发明申请
    SCALING AND QUANTIZATION FOR CHANNEL STATE INFORMATION REPORTING 有权

    公开(公告)号：US20230033864A1

    公开(公告)日：2023-02-02

    申请号：US17382145

    申请日：2021-07-21

    Applicant: QUALCOMM Incorporated

    Inventor： Stephen Jay Shellhammer ,  Bin Tian ,  Alireza Raissinia ,  Simone Merlin

    IPC: H04L5/00 ,  H04B17/318

    Abstract: Methods, systems, and devices for wireless communications are described. A station (STA) may receive a null data packet (NDP) on a plurality of subcarriers, and the STA may generate a channel state information (CSI) matrix for each subcarrier of the plurality of subcarriers. After generating a CSI matrix for a subcarrier, such as at least one subcarrier, the STA may scale each value in the CSI matrix using a power-of-two value to minimize complexity. Specifically, instead of scaling each value in the CSI matrix to a value between zero and one using divisions (for example, which may be computationally expensive), the STA may use shifting to scale each value in the CSI matrix. The STA may then quantize the scaled values in the CSI matrix for reporting, and the STA may transmit the quantized, scaled values in the CSI matrix in a CSI report.

Patent Agency Ranking