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    Reuse pattern network scheduling using load levels
    4.
    发明公开
    Reuse pattern network scheduling using load levels 审中-公开
    Netzplanung mit Wiederverwendungsmustern unter Verwendung von Laststufen

    公开(公告)号：EP1944911A2

    公开(公告)日：2008-07-16

    申请号：EP07118157.2

    申请日：2007-10-09

    申请人： FUJITSU LIMITED

    发明人： Zhu, Chenxi ,  Chen, Wei-Peng ,  Agre, Jonathan ,  Viorel, Dorin ,  Seshadri, Jagan

    IPC分类号： H04L12/28

    CPC分类号： H04W16/04 ,  H04B7/2606 ,  H04W16/26 ,  H04W84/047

    摘要： One or more stations are sorted based on respective load levels, and a reuse pattern is generated, based on the sorted load levels and mapped interference levels, including one or more reuse sets of stations capable of sharing a transmission resource. The stations within each reuse set are listed in order based on their respective load levels, and an additional station is added to a reuse set, as long as the cumulative transmission level within the reuse set is below a threshold interference level and the additional station is not already listed in another reuse set. A network schedule is updated based on the reuse pattern to increase bandwidth efficiency in the network.

    摘要翻译： 基于相应的负载水平对一个或多个站进行排序，并且基于排序的负载水平和映射的干扰水平（包括能够共享传输资源的站的一个或多个重用集合）生成重用模式。 每个重用集合内的站点按照它们各自的负载水平顺序列出，并且只要重用集合内的累积传输级别低于阈值干扰级别，并且附加站是 尚未列入另一个重用集。 基于重用模式更新网络调度以提高网络中的带宽效率。

    Beamforming from multiple transmission sites
    6.
    发明公开
    Beamforming from multiple transmission sites 有权
    Strahlformung von mehreren Sendestellen

    公开(公告)号：EP2523363A2

    公开(公告)日：2012-11-14

    申请号：EP12167722.3

    申请日：2012-05-11

    申请人： FUJITSU LIMITED

    发明人： Zhu, Chenxi

    IPC分类号： H04B7/06 ,  H04B7/02

    CPC分类号： H04B7/0639 ,  H04B7/024 ,  H04L5/0007 ,  H04L25/0224 ,  H04L25/03904 ,  H04L25/03955

    摘要： A beamforming method including selecting a first transmission site from a plurality of transmission sites (108a, 108b, 108c) based on the quality of a first channel between the first transmission site and an endpoint or terminal (110). The method further includes determining a first precoding matrix corresponding to the first transmission site. The first precoding matrix may be applied to data transmitted by the first transmission site to the endpoint. The method further includes determining a second precoding matrix corresponding to a second transmission site of the plurality of transmission sites. The second precoding matrix may be determined based on at least a first spatial direction that is calculated based on at least the first channel.

    摘要翻译： 一种波束形成方法，包括：基于所述第一传输站点与端点或终端（110）之间的第一信道的质量从多个传输站点（108a，108b，108c）中选择第一传输站点。 该方法还包括确定对应于第一传输站点的第一预编码矩阵。 第一预编码矩阵可以应用于由第一传输站点发送到端点的数据。 该方法还包括确定对应于多个传输站点的第二传输站点的第二预编码矩阵。 可以基于至少基于第一信道计算的至少第一空间方向来确定第二预编码矩阵。

    Power setting and pre-coding for wireless data transmission from multiple locations to a single device
    7.
    发明公开
    Power setting and pre-coding for wireless data transmission from multiple locations to a single device 审中-公开
    功率设置和预编码用于来自多个网站的一台设备上的无线数据传输

    公开(公告)号：EP2477341A1

    公开(公告)日：2012-07-18

    申请号：EP12151037.4

    申请日：2012-01-13

    申请人： Fujitsu Limited

    发明人： Zhu, Chenxi

    IPC分类号： H04B7/02 ,  H04B7/06 ,  H04W52/24

    CPC分类号： H04B7/024 ,  H04B7/0634 ,  H04B7/0639 ,  H04W52/242

    摘要： In one embodiment, a mobile device determines channel coefficient matrices for radio transmission from antennas at a plurality of locations, generates a power scaling vector based on the channel coefficient matrices, and selects one or more pre-coding matrices based on at least in part the power scaling vector. The antennas are operably connected to one or more base stations. The mobile device transmits the selected pre-coding matrices and the power scaling vector to the base stations, causing the base stations to transmit further data to the mobile device based on the selected pre-coding matrices and the power scaling vector.

    摘要翻译： 在一个实施方案中，在位置上的多个移动设备bestimmt信道系数矩阵用于从天线无线发送，基因速率的功率缩放向量基于所述信道系数矩阵，并且基于选择一个或多个预编码矩阵的至少一部分的 功率缩放向量。 天线被可操作地连接到一个或多个基站。 所述移动设备发送所选择的预编码矩阵和所述功率缩放矢量到基站，使得所述基站到另外的数据发送到基于所选择的预编码矩阵和所述功率缩放矢量的移动设备。

    communication systems
    8.
    发明公开
    communication systems 审中-公开

    公开(公告)号：EP2136587A3

    公开(公告)日：2012-05-02

    申请号：EP09171903.9

    申请日：2007-07-31

    申请人： FUJITSU LIMITED

    发明人： Hart, Michael John Beems ,  Zhou, Yuefeng ,  Viorel, Dorin ,  Zhu, Chenxi ,  Nakamura, Michiharu ,  Watanabe, Masahiro ,  Fujita, Hiroshi ,  Yoshida, Makoto

    IPC分类号： H04W28/16 ,  H04B7/15 ,  H04W40/22

    CPC分类号： H04W28/16 ,  H04B7/15507 ,  H04B7/2606 ,  H04L5/0007 ,  H04L5/0032 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2655 ,  H04L27/2692 ,  H04W48/08 ,  H04W84/047

    摘要： A transmission method for use in a multi-hop wireless communication system, the system comprising a source apparatus, a destination apparatus and one or more intermediate apparatuses, said source apparatus being operable to transmit information along a series of links forming a communication path extending from the source apparatus to the destination apparatus via the or each intermediate apparatus, and the or each intermediate apparatus being operable to receive information from a previous apparatus along the path and to transmit the received information to a subsequent apparatus along the path, the system having access to at least one predetermined transmission introduction sequence and also having access to a time-frequency format for use in assigning available transmission frequency bandwidth during a discrete transmission interval, said format defining a plurality of transmission windows within such an interval, each window occupying a different part of that interval and having a frequency bandwidth profile within said available transmission frequency bandwidth over its part of that interval, each said window being assignable for such a transmission interval to at least one of said apparatuses for use in transmission, the method comprising: when transmitting a message with a preamble in a particular transmission interval, transmitting the preamble in a first transmission window of that transmission interval; and transmitting the or one of the transmission introduction sequences in a second transmission window of that transmission interval other than the first transmission window preferably as control information for use by at least one said intermediate apparatus or the destination apparatus.

    A new scheme for operating a wireless station having directional antennas
    10.
    发明公开
    A new scheme for operating a wireless station having directional antennas 有权
    一种用于操作具有定向天线的无线站的新方案

    公开(公告)号：EP1710960A2

    公开(公告)日：2006-10-11

    申请号：EP06007379.8

    申请日：2006-04-07

    申请人： FUJITSU LIMITED

    发明人： Zhu, Chenxi ,  Nadeem, Tamer ,  Agre, Jonathan, R.

    IPC分类号： H04L12/28

    CPC分类号： H04W74/0808 ,  H04W16/28 ,  H04W84/12

    摘要： Disclosed is a wireless station having a receiver and a network allocation vector associated with each of a plurality of directional antennas. The receivers concurrently listen for frames from remote stations. When any receiver detects a frame from a remote station, the receiver activates its associated NAV. The station has one or more transmitters that can transmit using the antennas. While transmitting a signal using an antenna, the receivers associated with any non-transmitting antennas continue to listen for signals from remote stations. The station cancels any signals from the transmitting antenna received by the non-transmitting antennas. To perform the cancellation, the station performs a self-calibration procedure. The station can self-calibrate by either silencing neighboring stations or by inserting null tones into a transmitted calibration signal.

    摘要翻译： 公开了一种具有接收机和与多个定向天线中的每一个相关联的网络分配向量的无线站。 接收机同时侦听来自远程站的帧。 当任何接收器检测到来自远程站的帧时，接收器激活其关联的NAV。 该电台有一个或多个可以使用天线进行传输的发射机。 在使用天线发送信号时，与任何非发射天线相关联的接收机继续侦听来自远程站的信号。 该站取消由非发射天线接收的来自发射天线的任何信号。 要执行取消，电台执行自我校准程序。 该电台可以通过使相邻电台静音或将空音插入发送的校准信号来进行自校准。