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    Graduated single frequency network
    1.
    发明授权
    Graduated single frequency network 有权
    毕业单频网络

    公开(公告)号：US08229441B2

    公开(公告)日：2012-07-24

    申请号：US12197942

    申请日：2008-08-25

    申请人： Aaron Callard ,  Jianglei Ma ,  Sophie Vrzic

    发明人： Aaron Callard ,  Jianglei Ma ,  Sophie Vrzic

    IPC分类号： H04W40/00

    CPC分类号： H04W72/085 ,  H04B7/022 ,  H04W72/005

    摘要： The signals from adjacent transmitters reinforce one another. As a result of this over-the-air combining, signal quality is improved in the network and especially at or near cell boundaries. The present invention provides a graduated single frequency network (GSFN) wherein transmitters in cells throughout a geographic area cooperate to broadcast data to user terminals throughout the geographic area, and adjacent transmitters transmit signals that substantially reinforce one another. When transmitting the data, transmitters in certain adjacent cells throughout the geographic area may employ slightly different transmit parameters to provide slightly different transmission signals. The transmission signals used to transmit the data may be varied in a graduated fashion throughout the geographic area, wherein even when there is a difference in the transmission signals of transmitters in adjacent cells, the transmission signals reinforce one another despite being different.

    摘要翻译： 来自相邻发射机的信号相互加强。 作为这种空中组合的结果，网络中的信号质量得到改善，特别是在小区边界处或附近。 本发明提供了一种分级单频网络（GSFN），其中整个地理区域中的小区中的发射机协作以在整个地理区域中向用户终端广播数据，并且相邻的发射机发射基本上相互强化的信号。 当发送数据时，整个地理区域的某些相邻小区中的发射机可以采用稍微不同的发射参数来提供稍微不同的传输信号。 用于发送数据的传输信号可以在整个地理区域以分级方式变化，其中即使当相邻小区中的发射机的传输信号存在差异时，尽管不同，传输信号彼此相互加强。

    GRADUATED SINGLE FREQUENCY NETWORK
    2.
    发明申请
    GRADUATED SINGLE FREQUENCY NETWORK 有权
    研究单一频率网络

    公开(公告)号：US20090291700A1

    公开(公告)日：2009-11-26

    申请号：US12197942

    申请日：2008-08-25

    申请人： Aaron Callard ,  Jianglei Ma ,  Sophie Vrzic

    发明人： Aaron Callard ,  Jianglei Ma ,  Sophie Vrzic

    IPC分类号： H04B7/00

    CPC分类号： H04W72/085 ,  H04B7/022 ,  H04W72/005

    摘要： The signals from adjacent transmitters reinforce one another. As a result of this over-the-air combining, signal quality is improved in the network and especially at or near cell boundaries. The present invention provides a graduated single frequency network (GSFN) wherein transmitters in cells throughout a geographic area cooperate to broadcast data to user terminals throughout the geographic area, and adjacent transmitters transmit signals that substantially reinforce one another. When transmitting the data, transmitters in certain adjacent cells throughout the geographic area may employ slightly different transmit parameters to provide slightly different transmission signals. The transmission signals used to transmit the data may be varied in a graduated fashion throughout the geographic area, wherein even when there is a difference in the transmission signals of transmitters in adjacent cells, the transmission signals reinforce one another despite being different.

    摘要翻译： 来自相邻发射机的信号相互加强。 作为这种空中组合的结果，网络中的信号质量得到改善，特别是在小区边界处或附近。 本发明提供了一种分级单频网络（GSFN），其中整个地理区域中的小区中的发射机协作以在整个地理区域中向用户终端广播数据，并且相邻的发射机发射基本上相互强化的信号。 当发送数据时，整个地理区域的某些相邻小区中的发射机可以采用稍微不同的发射参数来提供稍微不同的传输信号。 用于发送数据的传输信号可以在整个地理区域以分级方式变化，其中即使当相邻小区中的发射机的传输信号存在差异时，尽管不同，传输信号彼此相互加强。

    METHOD AND APPARATUS FOR DETERMINING CHANNEL QUALITY INDEX IN MULTIPLE USER-MIMO COMMUNICATION NETWORKS
    3.
    发明申请
    METHOD AND APPARATUS FOR DETERMINING CHANNEL QUALITY INDEX IN MULTIPLE USER-MIMO COMMUNICATION NETWORKS 有权
    在多用户MIMO通信网络中确定通道质量指标的方法和装置

    公开(公告)号：US20130128820A1

    公开(公告)日：2013-05-23

    申请号：US13265639

    申请日：2010-04-21

    申请人： Sophie Vrzic ,  Mo-Han Fong ,  Robert Novak ,  Dong-Sheng Yu ,  Jianglei Ma ,  Jianglei Ma

    发明人： Jun Yuan ,  Sophie Vrzic ,  Mo-Han Fong ,  Robert Novak ,  Dong-Sheng Yu ,  Jianglei Ma ,  Jianglei Ma

    IPC分类号： H04W72/08 ,  H04B7/04

    CPC分类号： H04W72/085 ,  H04B7/0452 ,  H04B7/0456 ,  H04B7/0623 ,  H04B7/0632 ,  H04B7/0634 ,  H04B7/0686 ,  H04B17/373 ,  H04L1/0005 ,  H04L1/0016 ,  H04L1/0026 ,  H04L1/0031 ,  H04L1/0656 ,  H04W36/385 ,  H04W88/08

    摘要： In order to minimize the control signaling overhead associated with transmitting CQI data from mobile stations to base stations in wireless communication networks supporting MU-MIMO, the CQI during MU-MIMO operation is estimated based on SU-MIMO CQI data, mobile station geometry data, and mobile station PMI (Precoding Matrix Index) data. More particularly, the base station maintains and updates a knowledge pool that correlates geometry data and learned impact of interfering precoder data to degradation of CQI values responsive to switching from SU-MIMO operation to MU-MIMO operations. Then, when the base station switches from SU-MIMO operation to MU-MIMO operation, it consults the knowledge pool to predict the degradation in CQI and subtracts them from the known, pre-switching SU-MIMO CQI feedback data for each relevant mobile station to predict the post-switching MU-MIMO CQIs for that mobile station.

    摘要翻译： 为了最小化支持MU-MIMO的无线通信网络中的将CQI数据从移动站发送到基站的控制信令开销，基于SU-MIMO CQI数据，移动站几何数据， 和移动台PMI（预编码矩阵索引）数据。 更具体地，基站维护和更新将几何数据与学习的干扰预编码器数据的影响相关联的知识库与响应于从SU-MIMO操作切换到MU-MIMO操作的CQI值劣化。 然后，当基站从SU-MIMO操作切换到MU-MIMO操作时，它咨询知识库以预测CQI中的劣化，并从每个相关移动站的已知的预切换SU-MIMO CQI反馈数据中减去它们 以预测该移动台的后切换MU-MIMO CQI。

    Link Scheduling System and Method
    4.
    发明申请
    Link Scheduling System and Method 有权
    链路调度系统与方法

    公开(公告)号：US20170055276A1

    公开(公告)日：2017-02-23

    申请号：US14828872

    申请日：2015-08-18

    申请人： Aaron Callard ,  Alex Stephenne ,  Sophie Vrzic ,  Philippe Leroux

    发明人： Aaron Callard ,  Alex Stephenne ,  Sophie Vrzic ,  Philippe Leroux

    IPC分类号： H04W72/12

    摘要： A hierarchical link scheduling system and method is provided. A central controller gathers network information, including global parameters and long term demands, and determines an initial schedule for link activation based on these variables. A scheduler receives the initial schedule and modifies the initial schedule based on local parameters, inter-schedule negotiation, or other short term or localized requests. The scheduler activates the links according to the modified schedule. Accordingly, the scheduler can be responsible for modifying the initial schedule provided by central controller with localized or short term requests or demands, and providing the necessary parameters to enable link activation between nodes according to the modified schedule.

    摘要翻译： 提供了一种分级链路调度系统和方法。 中央控制器收集网络信息，包括全局参数和长期需求，并根据这些变量确定链接激活的初始调度。 调度器接收初始调度并基于本地参数，时间间协商或其他短期或本地化请求修改初始调度。 调度程序根据修改的时间表激活链接。 因此，调度器可以负责修改由中央控制器提供的具有本地化或短期请求或需求的初始调度，并且提供必要的参数以根据修改的调度来启用节点之间的链路激活。

    Link scheduling system and method
    5.
    发明授权
    Link scheduling system and method 有权

    公开(公告)号：US10425956B2

    公开(公告)日：2019-09-24

    申请号：US14828872

    申请日：2015-08-18

    申请人： Aaron Callard ,  Alex Stephenne ,  Sophie Vrzic ,  Philippe Leroux

    发明人： Aaron Callard ,  Alex Stephenne ,  Sophie Vrzic ,  Philippe Leroux

    IPC分类号： H04W72/12

    摘要： A hierarchical link scheduling system and method is provided. A central controller gathers network information, including global parameters and long term demands, and determines an initial schedule for link activation based on these variables. A scheduler receives the initial schedule and modifies the initial schedule based on local parameters, inter-schedule negotiation, or other short term or localized requests. The scheduler activates the links according to the modified schedule. Accordingly, the scheduler can be responsible for modifying the initial schedule provided by central controller with localized or short term requests or demands, and providing the necessary parameters to enable link activation between nodes according to the modified schedule.

    Pilot design for wireless system
    10.
    发明授权
    Pilot design for wireless system 有权
    无线系统的试点设计

    公开(公告)号：US08537915B2

    公开(公告)日：2013-09-17

    申请号：US13476242

    申请日：2012-05-21

    申请人： Dong-Sheng Yu ,  Mo-Han Fong ,  Jianglei Ma ,  Sophie Vrzic ,  Hang Zhang

    发明人： Dong-Sheng Yu ,  Mo-Han Fong ,  Jianglei Ma ,  Sophie Vrzic ,  Hang Zhang

    IPC分类号： H04K1/10

    CPC分类号： H04L27/2613 ,  H04B7/0413 ,  H04B7/0621 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/26 ,  H04L27/2611 ,  H04L27/2647 ,  H04L27/2662 ,  H04L2025/03414

    摘要： The description herein relates to pilot designs for an Orthogonal Frequency Division Multiplexing (OFDM) based communication system. In the preferred embodiment, the communication system is one operating according to the IEEE 802.16m, or WiMax, standard. In general, an OFDM transmitter operates to insert pilot symbols into a resource of a transmit frame according to a predetermined staggered pilot symbol pattern defining pilot symbol locations within the resource of the transmit frame. The predetermined pilot symbol pattern is defined such that pilot symbols are located at or near time boundaries of the resource, at or near frequency boundaries of the resource, or both. By doing so, when generating a channel estimate for the communication channel between the OFDM transmitter and an OFDM receiver based on the pilot symbols, extrapolations needed to estimate the channel near the boundaries of the resource are optimized, thereby improving overall channel estimation accuracy.

    摘要翻译： 这里的描述涉及用于基于正交频分复用（OFDM）的通信系统的导频设计。 在优选实施例中，通信系统是根据IEEE 802.16m或WiMax标准进行操作的通信系统。 通常，OFDM发射机操作以根据在发送帧的资源内定义导频符号位置的预定交错导频符号模式将导频符号插入到发射帧的资源中。 定义的导频符号模式被定义为使得导频符号位于资源的时间边界处或附近，在资源的频率边界处或附近，或两者附近。 通过这样做，当基于导频符号生成OFDM发射机和OFDM接收机之间的通信信道的信道估计时，优化估计资源边界附近的信道所需的外推，从而提高整体信道估计精度。