利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

97 条记录 (耗时 0.039 秒)

    Peer-to-peer communication in ad hoc wireless network
    1.
    发明授权
    Peer-to-peer communication in ad hoc wireless network 有权

    公开(公告)号：US08576846B2

    公开(公告)日：2013-11-05

    申请号：US11538222

    申请日：2006-10-03

    申请人： Ravi Kumar ,  J. Rodney Walton ,  Qiang Fu ,  Subrahmanyam Dravida

    发明人： Ravi Kumar ,  J. Rodney Walton ,  Qiang Fu ,  Subrahmanyam Dravida

    IPC分类号： H04L12/56

    CPC分类号： H04W76/11 ,  H04L63/0428 ,  H04W8/005 ,  H04W12/04 ,  H04W12/06 ,  H04W28/0268 ,  H04W48/16 ,  H04W84/18

    摘要： For a peer-to-peer call in an ad hoc wireless network, a wireless device performs discovery of a target wireless device, performs authentication of the target wireless device and generates a session key (e.g., using a pre-shared key or a certificate provisioned on the wireless device), forms an ad hoc wireless network with the target wireless device, and communicates peer-to-peer with the target wireless device via the ad hoc wireless network. The wireless device may perform discovery with a list of identifiers for wireless devices designated to communicate with this wireless device. The wireless device may derive a service set identifier (SSID) used to identify the ad hoc wireless network based on its user-specific identifier (e.g., its phone number) and/or a user-specific identifier for the target wireless device. The wireless device may also performs IP address discovery using the user-specific identifier for the target wireless device.

    Rate selection with margin sharing
    4.
    发明授权
    Rate selection with margin sharing 有权
    费率选择与保证金共享

    公开(公告)号：US08855226B2

    公开(公告)日：2014-10-07

    申请号：US12270842

    申请日：2008-11-13

    申请人： Irina Medvedev ,  J. Rodney Walton

    发明人： Irina Medvedev ,  J. Rodney Walton

    IPC分类号： H04B7/02 ,  H04L1/00 ,  H04B7/04

    CPC分类号： H04L1/0002 ,  H04B7/0413 ,  H04L1/0015 ,  Y02D50/10

    摘要： Rate selection with margin sharing in a system with independent data stream rates is presented. Signal-to-Noise Ratio (SNR) estimates are obtained for each stream. Rates are selected for the streams based on the SNR estimates, such that at least one data stream has an SNR margin below a threshold, each remaining data stream has an SNR margin above a respective threshold, and the total SNR margin for all streams is above a total threshold. For rate selection with margin sharing with a vector-quantized rate set, SNR estimates are obtained for usable transmission channels. The total SNR margin is determined for each rate combination based on the estimates. Each rate combination is associated with a specific number of data streams to transmit, a specific rate for each data stream, and a specific overall throughput. The combination with the highest overall throughput and non-negative total SNR margin is selected.

    摘要翻译： 介绍了具有独立数据流速率的系统中利润分配的费率选择。 获得每个流的信噪比（SNR）估计。 基于SNR估计为流选择速率，使得至少一个数据流的SNR余量低于阈值，每个剩余数据流具有高于相应阈值的SNR裕度，并且所有流的总SNR余量高于 总门槛。 对于利用矢量量化速率集进行边缘共享的速率选择，可获得可用传输信道的SNR估计。 基于估计，确定每个速率组合的总SNR容限。 每个速率组合与要发送的特定数量的数据流，每个数据流的特定速率以及特定的总吞吐量相关联。 选择具有最高总吞吐量和非负总体SNR余量的组合。

    MULTI-ANTENNA TRANSMISSION FOR SPATIAL DIVISION MULTIPLE ACCESS
    8.
    发明申请
    MULTI-ANTENNA TRANSMISSION FOR SPATIAL DIVISION MULTIPLE ACCESS 有权
    用于空间多路访问的多天线传输

    公开(公告)号：US20120213302A1

    公开(公告)日：2012-08-23

    申请号：US11869547

    申请日：2007-10-09

    申请人： J. Rodney Walton ,  John W. Ketchum ,  John Edward Smee ,  Mark S. Wallace ,  Steven J. Howard

    发明人： J. Rodney Walton ,  John W. Ketchum ,  John Edward Smee ,  Mark S. Wallace ,  Steven J. Howard

    IPC分类号： H04B7/02

    CPC分类号： H04B7/043 ,  H04B1/71072 ,  H04B7/0408 ,  H04B7/0413 ,  H04B7/0421 ,  H04B7/0617 ,  H04B7/0619 ,  H04B7/0697 ,  H04B17/309 ,  H04L5/023 ,  H04W16/28

    摘要： An uplink channel response matrix is obtained for each terminal and decomposed to obtain a steering vector used by the terminal to transmit on the uplink. An “effective” uplink channel response vector is formed for each terminal based on its steering vector and its channel response matrix. Multiple sets of terminals are evaluated based on their effective channel response vectors to determine the best set (e.g., with highest overall throughput) for uplink transmission. Each selected terminal performs spatial processing on its data symbol stream with its steering vector and transmits its spatially processed data symbol stream to an access point. The multiple selected terminals simultaneously transmit their data symbol streams via their respective MIMO channels to the access point. The access point performs receiver spatial processing on its received symbol streams in accordance with a receiver spatial processing technique to recover the data symbol streams transmitted by the selected terminals.

    摘要翻译： 获得每个终端的上行链路信道响应矩阵，并对其进行分解，得到终端在上行链路上使用的导向矢量。 基于其导向向量及其信道响应矩阵，为每个终端形成“有效”上行链路信道响应向量。 基于其有效信道响应向量来评估多组终端，以确定用于上行链路传输的最佳集合（例如具有最高总吞吐量）。 每个选择的终端利用其导向向量对其数据符号流执行空间处理，并将其空间处理的数据符号流发送到接入点。 多个选择的终端通过其相应的MIMO信道同时将其数据符号流发送到接入点。 接入点根据接收机空间处理技术对其接收到的符号流执行接收机空间处理，以恢复由所选终端发送的数据符号流。

    METHOD AND APPARATUS FOR ALLOCATING downlink RESOURCES IN A MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) COMMUNICATION SYSTEM
    9.
    发明申请
    METHOD AND APPARATUS FOR ALLOCATING downlink RESOURCES IN A MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) COMMUNICATION SYSTEM 有权
    用于在多输入多输出（MIMO）通信系统中分配下行链路资源的方法和装置

    公开(公告)号：US20110261899A1

    公开(公告)日：2011-10-27

    申请号：US13030183

    申请日：2011-02-18

    申请人： J. Rodney Walton ,  Mark S. Wallace ,  Steven J. Howard

    发明人： J. Rodney Walton ,  Mark S. Wallace ,  Steven J. Howard

    IPC分类号： H04L27/00

    CPC分类号： H04W16/00 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/061 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0026 ,  H04L1/06 ,  H04L25/0204 ,  H04L2025/03426 ,  H04W16/28 ,  H04W84/14

    摘要： Techniques to schedule downlink data transmission to a number of terminals in a wireless communication system. In one method, one or more sets of terminals are formed for possible data transmission, with each set including a unique combination of one or more terminals and corresponding to a hypothesis to be evaluated. One or more sub-hypotheses may further be formed for each hypothesis, with each sub-hypothesis corresponding to specific assignments of a number of transmit antennas to the one or more terminals in the hypothesis. The performance of each sub-hypothesis is then evaluated, and one of the evaluated sub-hypotheses is selected based on their performance. The terminal(s) in the selected sub-hypothesis are then scheduled for data transmission, and data is thereafter coded, modulated, and transmitted to each scheduled terminal from one or more transmit antennas assigned to the terminal.

    摘要翻译： 将无线通信系统中的下行链路数据传输调度到多个终端的技术。 在一种方法中，形成一组或多组终端用于可能的数据传输，每组包括一个或多个终端的唯一组合，并对应于待评估的假设。 可以针对每个假设进一步形成一个或多个子假设，其中每个子假设对应于假设中的一个或多个终端的多个发射天线的特定分配。 然后评估每个子假设的性能，并根据其性能选择评估的子假设之一。 然后将所选子假设中的终端调度用于数据传输，然后将数据从分配给终端的一个或多个发射天线编码，调制并发送到每个调度终端。