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254 条记录 (耗时 0.031 秒)

    Inter-cell power control in the presence of fractional frequency reuse
    51.
    发明授权
    Inter-cell power control in the presence of fractional frequency reuse 有权
    存在分数频率重用的单元间功率控制

    公开(公告)号：US08712424B2

    公开(公告)日：2014-04-29

    申请号：US12443780

    申请日：2007-10-30

    申请人： Xiliang Luo ,  Durga Prasad Malladi ,  Xiaoxia Zhang

    发明人： Xiliang Luo ,  Durga Prasad Malladi ,  Xiaoxia Zhang

    IPC分类号： H04B15/00

    CPC分类号： H04W52/24 ,  H04W16/02 ,  H04W24/02 ,  H04W52/146 ,  H04W52/225 ,  H04W52/241 ,  H04W52/247 ,  H04W52/343

    摘要： System(s) and method(s) are provided for inter-cell power control in the presence of fractional frequency reuse in a wireless communication system. Transmission power control of a terminal (210); and ensuing inter-cell interference mitigation, is accomplished by receiving load indicators (23Oi) from non-serving sectors (246i), decoding those load indicators corresponding to the non-serving sectors that operate in the same frequency bands as the terminal, and adjusting the transmission power according to the states of the decoded load indicators in conjunction with the associated non-serving sector forward link signal-to-interference and-noise ratio at the terminal. The states of the load indicators reflect magnitudes of interference metrics with respect to threshold values. Load indicators can also be conveyed by the non-serving sector to a base station (260) serving the terminal through a backhaul (250) communication, and said base station can schedule an adjusted transmission power for the terminal.

    摘要翻译： 在无线通信系统中存在分数次频率重用的情况下，为单元间功率控制提供系统和方法。 终端（210）的传输功率控制; 并且随后进行小区间干扰减轻，是通过从非服务扇区（246i）接收负载指示符（230i）来完成的，解码对应于与终端在相同频带中工作的非服务扇区的那些负载指示符，并且调整 根据解码的负载指示符的状态结合在终端处的相关联的非服务扇区前向链路信号与干扰噪声比的发送功率。 负载指示器的状态反映相对于阈值的干扰度量的幅度。 负载指示符也可以由非服务扇区传送到通过回程（250）通信为终端服务的基站（260），并且所述基站可以为终端调度调整的传输功率。

    Uplink pilot multiplexing in single user MIMO and SDMA for single carrier frequency division multiple access systems
    52.
    发明授权
    Uplink pilot multiplexing in single user MIMO and SDMA for single carrier frequency division multiple access systems 有权
    用于单载波频分多址系统的单用户MIMO和SDMA中的上行链路导频复用

    公开(公告)号：US08300533B2

    公开(公告)日：2012-10-30

    申请号：US12440586

    申请日：2007-10-05

    申请人： Durga Prasad Malladi ,  Juan Montojo ,  Xiaoxia Zhang

    发明人： Durga Prasad Malladi ,  Juan Montojo ,  Xiaoxia Zhang

    IPC分类号： G01R31/08 ,  H04J1/00

    CPC分类号： H04L5/0048 ,  H04L5/0023

    摘要： Systems and methodologies are described that facilitate adaptive uplink pilot multiplexing schemes. In various embodiments, frequency position and pilot channel bandwidth can be adaptively varied in a block over time based on the uplink channel data, such as the number of streams to be multiplexed. Thus, the provided adaptive uplink pilot multiplexing schemes provide flexible uplink pilot allocation schemes while maintaining single carrier waveform for improved transmit power efficiency and orthogonality of pilots within blocks for improve channel estimation and suppression of interference.

    摘要翻译： 描述了促进自适应上行链路导频复用方案的系统和方法。 在各种实施例中，频率位置和导频信道带宽可以基于上行链路信道数据（诸如要多路复用的流的数量）随时间在块中自适应地变化。 因此，提供的自适应上行链路导频复用方案提供灵活的上行链路导频分配方案，同时保持单载波波形，以提高块内导频的发射功率效率和正交性，以改善信道估计和干扰抑制。

    Inter-cell power control for interference management
    53.
    发明授权
    Inter-cell power control for interference management 有权
    用于干扰管理的单元间功率控制

    公开(公告)号：US08285216B2

    公开(公告)日：2012-10-09

    申请号：US12443969

    申请日：2007-10-31

    申请人： Durga Prasad Malladi ,  Xiaoxia Zhang

    发明人： Durga Prasad Malladi ,  Xiaoxia Zhang

    IPC分类号： H04B1/00 ,  H04B15/00

    CPC分类号： H04W52/10 ,  H04W52/08 ,  H04W52/242

    摘要： A system and method for inter-cell power control for interference management in an OFDM system is provided. The system provides for a combination use of open loop and closed loop PSD control algorithms. The open loop control is a function of path loss from the serving cell as well as the neighboring cells. The closed loop control updates the end node transmit PSD by listening to the load indicators from the serving cell and at least one other neighboring non-serving cell which generates the highest level of interference. The system thus provides a fast and tight control with multi-cell information that allows improved inter-cell interference control.

    摘要翻译： 提供了一种用于OFDM系统中的干扰管理的小区间功率控制的系统和方法。 该系统提供组合使用开环和闭环PSD控制算法。 开环控制是来自服务小区以及相邻小区的路径损耗的函数。 闭环控制通过监听来自服务小区的负载指示符和产生最高干扰水平的至少一个其他相邻非服务小区来更新终端节点传输PSD。 因此，该系统提供了具有允许改进的小区间干扰控制的多小区信息的快速且严格的控制。

    CONTROL CHANNEL FORMAT INDICATOR FREQUENCY MAPPING
    55.
    发明申请
    CONTROL CHANNEL FORMAT INDICATOR FREQUENCY MAPPING 有权
    控制通道格式指示器频率映射

    公开(公告)号：US20090022235A1

    公开(公告)日：2009-01-22

    申请号：US12142131

    申请日：2008-06-19

    申请人： Xiaoxia Zhang ,  Durga Prasad Malladi ,  Juan Montojo

    发明人： Xiaoxia Zhang ,  Durga Prasad Malladi ,  Juan Montojo

    IPC分类号： H04L27/28

    CPC分类号： H04L5/0053 ,  H04L5/0007 ,  H04L5/0016 ,  H04W48/12

    摘要： Systems and methodologies are described that facilitate selecting frequency for transmitting control channel format indicator (CCFI) data such to identify a related cell. In one example, the CCFI data can be transmitted in an initial portion of frequency (such as an orthogonal frequency division multiplexing (OFDM) symbol) in a time transmit interval (TTI). The CCFI data can be spread across the initial portion of frequency and be shifted to identify the transmitting cell. Additionally, the CCFI data can be scrambled to further identify the cell. The CCFI data can also be utilized to determine structure of subsequent control and/or data channels.

    摘要翻译： 描述了促进选择用于发送控制信道格式指示符（CCFI）数据以识别相关小区的频率的系统和方法。 在一个示例中，CCFI数据可以在时间发射间隔（TTI）中的频率的初始部分（诸如正交频分复用（OFDM）符号）中发送。 CCFI数据可以分布在频率的初始部分，并被移位以识别发射小区。 另外，可以加扰CCFI数据以进一步识别小区。 也可以利用CCFI数据来确定后续控制和/或数据信道的结构。

    Systems and methods for communicating control data using multiple slot formats
    56.
    发明授权
    Systems and methods for communicating control data using multiple slot formats 有权
    使用多种格式传输控制数据的系统和方法

    公开(公告)号：US07474643B2

    公开(公告)日：2009-01-06

    申请号：US10952426

    申请日：2004-09-27

    申请人： Durga Prasad Malladi ,  Serge D. Willenegger ,  Xiaoxia Zhang

    发明人： Durga Prasad Malladi ,  Serge D. Willenegger ,  Xiaoxia Zhang

    IPC分类号： H04Q7/00 ,  H04Q7/28 ,  H04J3/00 ,  H04J3/12 ,  H04B7/212

    CPC分类号： H04W28/06 ,  H04B7/2618 ,  H04B7/2637 ,  H04B7/2659 ,  H04L1/0002 ,  H04W28/22 ,  H04W52/58

    摘要： Systems and methods for communicating control information in slots that use at least two different slot formats. In one embodiment, a method implemented in a wireless communication system includes providing at least two different slot formats, formatting control data in the slots of a control frame according to the at least two different slot formats, transmitting the control frame from a mobile station to a base station via a control channel, receiving the control frame, extracting data rate information from the control frame according to the at least two different slot formats, decoding the extracted control data, parsing the extracted data into separate data rate information and decoding data received via one or more data channels using the decoded control data. In one embodiment, the method is used to enable additional TFCI data corresponding to two different data channels to be transmitted on a single control channel.

    摘要翻译： 用于在使用至少两种不同的时隙格式的时隙中传送控制信息的系统和方法。 在一个实施例中，在无线通信系统中实现的方法包括提供至少两种不同的时隙格式，根据至少两种不同的时隙格式在控制帧的时隙中格式化控制数据，将控制帧从移动台发送到 通过控制信道接收基站，接收控制帧，根据至少两种不同的时隙格式从控制帧提取数据速率信息，对所提取的控制数据进行解码，将所提取的数据解析成单独的数据速率信息和解码接收的数据 通过使用解码的控制数据的一个或多个数据信道。 在一个实施例中，该方法用于使得能够在单个控制信道上发送对应于两个不同数据信道的附加TFCI数据。

    UPLINK TIMING CONTROL
    57.
    发明申请
    UPLINK TIMING CONTROL 有权
    上拉时序控制

    公开(公告)号：US20080279131A1

    公开(公告)日：2008-11-13

    申请号：US12050702

    申请日：2008-03-18

    申请人： Durga Prasad Malladi ,  Xiaoxia Zhang

    发明人： Durga Prasad Malladi ,  Xiaoxia Zhang

    IPC分类号： G08C17/00

    CPC分类号： H04W52/0216 ,  H04W52/0248 ,  H04W56/0045 ,  Y02D70/1242 ,  Y02D70/1262

    摘要： Systems and methodologies are described that facilitate evaluating and utilizing timing updates in a wireless communications network. A base station can transmit timing adjustment commands to mobile devices as needed as opposed to a periodic timing update where timing adjustment commands are always sent within a certain period. However, the mobile devices need to stay awake to monitor the timing adjustment message resulting in high power consumption. On the other hand with periodic update, the mobile devices can wake up to check whether there is a timing adjustment for itself and, if not, return to a sleep mode. With the proposed method, a mobile device can sleep for a period of time to check for timing adjustment commands upon waking. Thus, both the mobile power consumption and downlink signaling overhead are reduced.

    摘要翻译： 描述了有助于评估和利用无线通信网络中的定时更新的系统和方法。 根据需要，基站可以根据需要向移动设备发送定时调整命令，而不是在一定周期内总是发送定时调整命令的周期性定时更新。 然而，移动设备需要保持清醒以监视定时调整消息，导致高功耗。 另一方面，随着定期更新，移动设备可以唤醒以检查是否有自己的时序调整，如果不是，则返回休眠模式。 利用所提出的方法，移动设备可以在一段时间内睡眠以在醒来时检查定时调整命令。 因此，移动功耗和下行信令开销都降低了。

    CYCLIC DELAY DIVERSITY AND PRECODING FOR WIRELESS COMMUNICATION
    58.
    发明申请
    CYCLIC DELAY DIVERSITY AND PRECODING FOR WIRELESS COMMUNICATION 有权
    循环延迟多样性和无线通信预测

    公开(公告)号：US20080247364A1

    公开(公告)日：2008-10-09

    申请号：US12026360

    申请日：2008-02-05

    申请人： Byoung-Hoon Kim ,  Durga Prasad Malladi ,  Xiaoxia Zhang ,  Taesang Yoo

    发明人： Byoung-Hoon Kim ,  Durga Prasad Malladi ,  Xiaoxia Zhang ,  Taesang Yoo

    IPC分类号： H04J3/00 ,  H04B7/02

    CPC分类号： H04B7/0671 ,  H04B7/0473 ,  H04L5/0023 ,  H04L25/03898 ,  H04L27/2646

    摘要： Techniques for sending a MIMO transmission using a combination of cyclic delay diversity and precoding are described. A set of delays (e.g., zero delay, small delay, and large delay) for cyclic delay diversity and a set of precoding matrices may be supported. In one design, a Node B may select a delay specifically for a UE or for a set of UEs served by the Node B. In another design, a UE may evaluate different combinations of precoding matrix and delay, determine the combination with the best performance, and send this combination of precoding matrix and delay to the Node B. The Node B may perform precoding with the precoding matrix and then processing for cyclic delay diversity based on the selected delay. Alternatively, the Node B may perform processing for cyclic delay diversity based on the selected delay and then precoding with the precoding matrix.

    摘要翻译： 描述了使用循环延迟分集和预编码的组合来发送MIMO传输的技术。 可以支持用于循环延迟分集和一组预编码矩阵的一组延迟（例如，零延迟，小延迟和大延迟）。 在一种设计中，节点B可以针对UE或由节点B服务的一组UE选择延迟。在另一种设计中，UE可以评估预编码矩阵和延迟的不同组合，确定具有最佳性能的组合 并将预编码矩阵和延迟的组合发送到节点B.节点B可以利用预编码矩阵执行预编码，然后基于所选择的延迟来执行循环延迟分集的处理。 或者，节点B可以基于所选择的延迟执行循环延迟分集的处理，然后用预编码矩阵进行预编码。

    Uplink timing control
    59.
    发明授权
    Uplink timing control 有权
    上行时序控制

    公开(公告)号：US08942150B2

    公开(公告)日：2015-01-27

    申请号：US12050702

    申请日：2008-03-18

    申请人： Durga Prasad Malladi ,  Xiaoxia Zhang

    发明人： Durga Prasad Malladi ,  Xiaoxia Zhang

    IPC分类号： G08C17/00

    CPC分类号： H04W52/0216 ,  H04W52/0248 ,  H04W56/0045 ,  Y02D70/1242 ,  Y02D70/1262

    摘要： Systems and methodologies are described that facilitate evaluating and utilizing timing updates in a wireless communications network. A base station can transmit timing adjustment commands to mobile devices as needed as opposed to a periodic timing update where timing adjustment commands are always sent within a certain period. However, the mobile devices need to stay awake to monitor the timing adjustment message resulting in high power consumption. On the other hand with periodic update, the mobile devices can wake up to check whether there is a timing adjustment for itself and, if not, return to a sleep mode. With the proposed method, a mobile device can sleep for a period of time to check for timing adjustment commands upon waking. Thus, both the mobile power consumption and downlink signaling overhead are reduced.

    摘要翻译： 描述了有助于评估和利用无线通信网络中的定时更新的系统和方法。 根据需要，基站可以根据需要向移动设备发送定时调整命令，而不是在一定周期内总是发送定时调整命令的周期性定时更新。 然而，移动设备需要保持清醒以监视定时调整消息，导致高功耗。 另一方面，随着定期更新，移动设备可以唤醒以检查是否有自己的时序调整，如果不是，则返回休眠模式。 利用所提出的方法，移动设备可以在一段时间内睡眠以在醒来时检查定时调整命令。 因此，移动功耗和下行信令开销都降低了。

    SPATIAL TECHNIQUES FOR EVOLVED MULTIMEDIA BROADCAST MULTICAST SERVICE ENHANCEMENT
    60.
    发明申请
    SPATIAL TECHNIQUES FOR EVOLVED MULTIMEDIA BROADCAST MULTICAST SERVICE ENHANCEMENT 审中-公开
    多媒体多媒体广播服务增强的空间技术

    公开(公告)号：US20120213144A1

    公开(公告)日：2012-08-23

    申请号：US13402799

    申请日：2012-02-22

    申请人： Xiaoxia Zhang ,  Yongbin Wei ,  Durga Prasad Malladi

    发明人： Xiaoxia Zhang ,  Yongbin Wei ,  Durga Prasad Malladi

    IPC分类号： H04W4/06 ,  H04H20/71

    CPC分类号： H04B7/024 ,  H04B7/026 ,  H04B7/0682

    摘要： Transmission of eMBMS signals by at least one network entity of a wireless communications system may include coordinating transmission of eMBMS signaling with a remote access point of a wireless communications system to broadcast the eMBMS signaling from a multiple antenna matrix comprising at least one antenna of the network entity and at least one antenna of the access node. The network entity may be an access point. The access point may vary a precoding matrix applied to the eMBMS signaling to transmit from the network entity, or use alternative techniques for providing transmit diversity. Accordingly, the access point may provide transmit diversity for the eMBMS signaling transmitted from the multiple antenna matrix implemented between different cells on the wireless communication network. The access point may vary the precoding matrix to cause cyclical rotation of beam direction for the eMBMS transmissions from different cells of the network.

    摘要翻译： 由无线通信系统的至少一个网络实体传输eMBMS信号可以包括协调eMBMS信令与无线通信系统的远程接入点的传输，以从包括网络的至少一个天线的多天线阵列广播eMBMS信令 实体和接入节点的至少一个天线。 网络实体可以是接入点。 接入点可以改变应用于从网络实体发送的eMBMS信令的预编码矩阵，或者使用替代技术来提供发射分集。 因此，接入点可以提供从在无线通信网络上的不同小区之间实现的多天线矩阵发送的eMBMS信令的发射分集。 接入点可以改变预编码矩阵以引起来自网络的不同小区的eMBMS传输的波束方向的周期性旋转。