利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

56 条记录 (耗时 0.019 秒)

    Transmitter-based link adaptation
    2.
    发明授权
    Transmitter-based link adaptation 有权

    公开(公告)号：US11805431B2

    公开(公告)日：2023-10-31

    申请号：US17092702

    申请日：2020-11-09

    申请人： QUALCOMM Incorporated

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

    IPC分类号： H04W24/08 ,  H04L27/26 ,  H04W84/12

    CPC分类号： H04W24/08 ,  H04L27/2627 ,  H04W84/12

    摘要： This disclosure provides methods, devices and systems for link adaptation in wireless communications. Some implementations more specifically relate to transmitter-based modulation and coding scheme (MCS) selection. A transmitting device transmits a test packet, over a wireless channel, to a receiving device. The receiving device generates one or more signal-to-interference-plus-noise ratio (SINR) estimates for the wireless channel based on the received sounding packet. In some aspects, each SINR estimate may be associated with a particular modulation order. In some other aspects, each SINR estimate may be generated based on a transmitter configuration or a receiver type to be used for subsequent communications between the transmitting device and the receiving device. The receiving device transmits feedback, including the SINR estimates, to the transmitting device. The transmitting device then selects an MCS to be used for subsequent communications with the receiving device based on the SINR estimates and associated modulation orders.

    HYBRID AUTOMATIC REPEAT REQUEST (HARQ) WITH SLIDING WINDOW FEEDBACK
    3.
    发明申请
    HYBRID AUTOMATIC REPEAT REQUEST (HARQ) WITH SLIDING WINDOW FEEDBACK 有权

    公开(公告)号：US20210036809A1

    公开(公告)日：2021-02-04

    申请号：US16945605

    申请日：2020-07-31

    申请人： QUALCOMM Incorporated

    发明人： Stephen Jay Shellhammer ,  Jialing Li Chen ,  Dung Ngoc Doan ,  Bin Tian ,  Alfred Asterjadhi

    IPC分类号： H04L1/18 ,  H04B7/0456 ,  H04W80/02 ,  H04L1/00 ,  H04L1/16

    摘要： This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for implementing a hybrid automatic repeat request (HARQ) protocol in a wireless local area network (WLAN). A first WLAN device may transmit a first HARQ frame to a second WLAN device. The first HARQ frame may include initial transmissions of a first plurality of forward error correction (FEC) codewords. The HARQ protocol may support new techniques for feedback, such as a feedback capability in which a bitmap may be used to indicate decoding failures of codewords. The first feedback message may include indicators to change a HARQ configuration parameter based on channel conditions. In some implementations, the second HARQ frame may combine retransmissions regarding the failed codewords with initial transmissions of a second plurality of codewords.

    METHODS AND APPARATUS FOR PACKET ACQUISITION IN MIXED-RATE WIRELESS COMMUNICATION NETWORKS
    6.
    发明申请
    METHODS AND APPARATUS FOR PACKET ACQUISITION IN MIXED-RATE WIRELESS COMMUNICATION NETWORKS 有权
    混合无线通信网络中分组获取的方法与设备

    公开(公告)号：US20160080973A1

    公开(公告)日：2016-03-17

    申请号：US14852207

    申请日：2015-09-11

    申请人： QUALCOMM Incorporated

    发明人： Bin Tian ,  Tao Tian ,  Sameer Vermani ,  Eric Pierre Rebeiz ,  Dung Ngoc Doan ,  Lin Yang ,  Rahul Tandra

    IPC分类号： H04W28/06

    CPC分类号： H04L27/261

    摘要： A method of wirelessly communicating a packet including a first portion for transmission over at least one channel of a first transmission type and a second portion for transmission over at least one channel of a second transmission type. In one aspect, the method includes generating, at a wireless device, a packet including a first portion having a first symbol duration. The packet further includes a second portion having a second symbol duration greater than the first. The second portion can include a plurality of repeated portions of the signal field, the repeated portions having the second symbol duration. The first portion includes a first training field. The method further includes prepending or appending a second training field to the first portion. The second training field has the second symbol duration. The method further includes transmitting the packet.

    摘要翻译： 一种无线地传送分组的方法，包括用于通过第一传输类型和第二部分的至少一个信道进行传输的第一部分，用于通过第二传输类型的至少一个信道进行传输。 在一个方面，该方法包括在无线设备处生成包括具有第一符号持续时间的第一部分的分组。 分组还包括具有大于第一符号持续时间的第二符号持续时间的第二部分。 第二部分可以包括信号场的多个重复部分，重复部分具有第二符号持续时间。 第一部分包括第一训练场。 该方法还包括向第一部分预先或附加第二训练场。 第二个训练场具有第二个符号持续时间。 该方法还包括发送分组。

    TECHNIQUES FOR OUTER LOOP MANAGEMENT IN A MULTIPLE OUTPUT SYSTEM
    7.
    发明申请
    TECHNIQUES FOR OUTER LOOP MANAGEMENT IN A MULTIPLE OUTPUT SYSTEM 有权
    在多输出系统中进行外环管理的技术

    公开(公告)号：US20150139125A1

    公开(公告)日：2015-05-21

    申请号：US14543839

    申请日：2014-11-17

    申请人： QUALCOMM Incorporated

    发明人： Arjun BHARADWAJ ,  Dung Ngoc Doan ,  Sharad Deepak Sambhwani

    IPC分类号： H04L5/00 ,  H04W72/06 ,  H04W72/04

    CPC分类号： H04L5/0057 ,  H04L1/0026 ,  H04L1/0031 ,  H04L1/1607 ,  H04L1/20 ,  H04L5/0055 ,  H04W72/0413 ,  H04W72/06

    摘要： An example method may include decoding, at a UE, a downlink data transmission and determining, over each of multiple streams including a single stream and two dual streams, whether to transmit an acknowledge (ACK) or a negative acknowledge (NACK) message to a base station based on a result of the decoding. Further, the example method may include calculating a signal noise ratio (SNR) value for adjusting each of the multiple streams based on the determining. Further still, the example method may include mapping the calculated SNR value of the single stream to a first channel quality indicator (CQI) value. Moreover, the example method may include mapping the calculated SNR value of the two dual streams to a second CQI value. In addition, the example method may include transmitting the first CQI value and the second CQI value to the base station.

    摘要翻译： 一个示例性方法可以包括在UE处对下行链路数据传输进行解码，并且通过包括单个流和两个双流的多个流中的每一个确定是否将确认（ACK）或否定确认（NACK）消息发送到 基于解码结果的基站。 此外，示例性方法可以包括基于确定来计算用于调整多个流中的每一个的信号噪声比（SNR）值。 此外，示例性方法可以包括将所计算的单个流的SNR值映射到第一信道质量指示符（CQI）值。 此外，示例性方法可以包括将所计算的两个双流的SNR值映射到第二CQI值。 此外，示例性方法可以包括向基站发送第一CQI值和第二CQI值。

    Medium access control (MAC) protocol data unit (MPDU) and codeword alignment and validation
    9.
    发明授权
    Medium access control (MAC) protocol data unit (MPDU) and codeword alignment and validation 有权

    公开(公告)号：US11496924B2

    公开(公告)日：2022-11-08

    申请号：US16917225

    申请日：2020-06-30

    申请人： QUALCOMM Incorporated

    发明人： Jialing Li Chen ,  Alfred Asterjadhi ,  Stephen Jay Shellhammer ,  Dung Ngoc Doan ,  Bin Tian ,  George Cherian ,  Abhishek Pramod Patil

    IPC分类号： H04W28/04 ,  H04L1/00 ,  H04L1/18

    摘要： This disclosure provides methods, devices and systems of wireless communication in accordance with hybrid automatic repeat request (HARQ) techniques. Some implementations more specifically relate to aligning aggregate medium access control (MAC) protocol data unit (A-MPDU) subframes with codeword boundaries in a physical-layer service data unit (PSDU). The alignment may be performed by selectively adding padding bits to the PSDU based on the size of each A-MPDU subframe and the lengths of the codewords. In some aspects, an A-MPDU subframe may be aligned with a first codeword of the PSDU so that the first A-MPDU subframe is encoded exclusively within the first codeword. In some other aspects, an A-MPDU subframe may be aligned with two or more contiguous codewords of the PSDU so that the two or more contiguous codewords include the A-MPDU subframe and no portions of any other A-MPDU subframe.

    LINK ADAPTATION USING A LINK QUALITY ESTIMATION SEQUENCE
    10.
    发明申请
    LINK ADAPTATION USING A LINK QUALITY ESTIMATION SEQUENCE 有权

    公开(公告)号：US20210176657A1

    公开(公告)日：2021-06-10

    申请号：US17105349

    申请日：2020-11-25

    申请人： QUALCOMM Incorporated

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

    IPC分类号： H04W28/02 ,  H04B7/0413 ,  H04B17/309 ,  H04L5/00

    摘要： This disclosure provides systems, methods, and apparatus for link adaptation in a wireless local area network (WLAN). A link adaptation test packet from a first WLAN device to a second WLAN device may be formatted as a multiple-input-multiple-output (MIMO) transmission and may include one or more test portions for link quality estimation of the MIMO transmission. A link quality estimation portion of the test packet may permit measurement of link quality for various spatial streams of the MIMO transmission. The link adaptation test packet may enable a fast rate adaptation of a communication link based on the impact of interference to the various spatial streams. The second WLAN device may provide feedback information regarding the one or more test portions. The feedback information may be used to determine a transmission rate for a subsequent transmission from the first WLAN device to the second WLAN device based on wireless channel conditions.