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    MITIGATION OF CRS MISALIGNMENT IN COORDINATED MULTIPOINT COMMUNICATIONS
    4.
    发明申请
    MITIGATION OF CRS MISALIGNMENT IN COORDINATED MULTIPOINT COMMUNICATIONS 审中-公开
    协调多点通信中CRS缺失的缓解

    公开(公告)号：US20110032838A1

    公开(公告)日：2011-02-10

    申请号：US12849602

    申请日：2010-08-03

    申请人： Ke Liu ,  Xiaoxia Zhang ,  Durga Prasad Malladi ,  Hao Xu

    发明人： Ke Liu ,  Xiaoxia Zhang ,  Durga Prasad Malladi ,  Hao Xu

    IPC分类号： H04W40/00 ,  H04W24/00

    CPC分类号： H04L5/0032 ,  H04L5/005 ,  H04L5/0091

    摘要： Certain aspects of the present disclosure relate to a method for coordinated multipoint wireless communications. A technique for joint processing of misaligned reference signals in coordinated multipoint communications is provided. In one aspect, a cell may transmit an offsetting reference signal which, when processed by a receiving user equipment, at least partially cancels a first reference signal transmitted by the cell.

    摘要翻译： 本公开的某些方面涉及用于协调多点无线通信的方法。 提供了一种在协调多点通信中联合处理未对准参考信号的技术。 在一个方面，小区可以发送偏移参考信号，该偏移参考信号在被接收用户设备处理时至少部分地消除由小区发送的第一参考信号。

    DETERMINATION OF NETWORK SYNCHRONIZATION
    5.
    发明申请
    DETERMINATION OF NETWORK SYNCHRONIZATION 有权
    网络同步的确定

    公开(公告)号：US20120044928A1

    公开(公告)日：2012-02-23

    申请号：US13212829

    申请日：2011-08-18

    申请人： Kapil Bhattad ,  Tao Luo ,  Taesang Yoo ,  Xiaoxia Zhang ,  Xiliang Luo ,  Ke Liu ,  Durga Prasad Malladi

    发明人： Kapil Bhattad ,  Tao Luo ,  Taesang Yoo ,  Xiaoxia Zhang ,  Xiliang Luo ,  Ke Liu ,  Durga Prasad Malladi

    IPC分类号： H04J3/06

    CPC分类号： H04J11/0083 ,  H04B1/70718 ,  H04L5/0007 ,  H04W28/04 ,  H04W48/16 ,  H04W88/02

    摘要： User equipment (UE) associated with synchronous networks operate in a synchronous mode while UEs associated with asynchronous networks operate in an asynchronous mode. When operating in a synchronous mode, a UE can significantly improve performance of synchronization signal detection, data decoding, and tracking loop management by using the interference cancellation (IC) techniques that are not available in an asynchronous mode of operation. Obtaining synchronization indicators and determining the synchronization status of the current network by UE is disclosed. The determination may be based on the synchronization indicator, whether detected through signal detection, signal measurements, signal analysis, or the like.

    摘要翻译： 与同步网络相关联的用户设备（UE）以同步模式工作，而与异步网络相关联的UE以异步模式工作。 当在同步模式下工作时，UE可以通过使用在异步操作模式中不可用的干扰消除（IC）技术来显着提高同步信号检测，数据解码和跟踪环路管理的性能。 公开了获取同步指示符并确定UE当前网络的同步状态。 该确定可以基于通过信号检测，信号测量，信号分析等检测的同步指示器。

    Per-cell timing and/or frequency acquisition and their use on channel estimation in wireless networks
    6.
    发明授权
    Per-cell timing and/or frequency acquisition and their use on channel estimation in wireless networks 有权

    公开(公告)号：US10111111B2

    公开(公告)日：2018-10-23

    申请号：US12949020

    申请日：2010-11-18

    申请人： Taesang Yoo ,  Tao Luo ,  Xiaoxia Zhang ,  Ke Liu

    发明人： Taesang Yoo ,  Tao Luo ,  Xiaoxia Zhang ,  Ke Liu

    IPC分类号： H04W24/00 ,  H04W56/00

    摘要： A method, an apparatus, and a computer program product for wireless communication are provided in which a system timing is estimated, derived from timing of one or more cells, a timing offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the timing offsets. In addition, a method, an apparatus, and a computer program product for wireless communication are provided in which a carrier frequency is estimated, derived from a frequency of one or more cells, a frequency offset is determined for a plurality of cells relative to the estimated system timing, and signals received form the plurality of cells are processed using the frequency offsets.

    Adaptive transmissions in coordinated multiple point communications
    7.
    发明授权
    Adaptive transmissions in coordinated multiple point communications 有权
    协调多点通信中的自适应传输

    公开(公告)号：US09172561B2

    公开(公告)日：2015-10-27

    申请号：US12842752

    申请日：2010-07-23

    申请人： Tao Luo ,  Durga Prasad Malladi ,  Xiaoxia Zhang ,  Yongbin Wei ,  Juan Montojo ,  Ke Liu

    发明人： Tao Luo ,  Durga Prasad Malladi ,  Xiaoxia Zhang ,  Yongbin Wei ,  Juan Montojo ,  Ke Liu

    IPC分类号： H04L12/26 ,  H04L25/02 ,  H04B7/02 ,  H04B7/04

    CPC分类号： H04L25/0224 ,  H04B7/024 ,  H04B7/0417

    摘要： Systems and methodologies are described that facilitate adaptively communicating data to wireless devices. An access point can precode a dedicated reference signal (DRS) for transmitting to a wireless device, and the wireless device can receive the precoded DRS. The wireless device can determine the precoder by estimating a channel of the DRS and can provide channel condition feedback to the access point. The access point can create data signals including a single or a burst of data transmissions according to the feedback and can precode the data signals using the same precoder. The wireless device can additionally decode the data signals using the precoder. Moreover, the access point can cycle through precoders according to a patterned, random, pseudo-random, and/or similar sequence.

    摘要翻译： 描述了促进将数据自适应地传送到无线设备的系统和方法。 接入点可以对专用参考信号（DRS）进行预编码，以发送到无线设备，并且无线设备可以接收预编码的DRS。 无线设备可以通过估计DRS的信道来确定预编码器，并且可以向接入点提供信道条件反馈。 接入点可以根据反馈创建数据信号，包括数据传输的单个或突发，并且可以使用相同的预编码器来对数据信号进行预编码。 无线设备可以使用预编码器来附加地解码数据信号。 此外，接入点可以根据图案化，随机，伪随机和/或类似的顺序循环穿过预编码器。

    Detecting and reporting physical-layer cell identifier collisions in wireless networks
    8.
    发明授权
    Detecting and reporting physical-layer cell identifier collisions in wireless networks 有权
    检测和报告无线网络中的物理层小区标识符冲突

    公开(公告)号：US09143955B2

    公开(公告)日：2015-09-22

    申请号：US13101877

    申请日：2011-05-05

    申请人： Xiaoxia Zhang ,  Ke Liu ,  Kapil Bhattad ,  Taesang Yoo ,  Tao Luo

    发明人： Xiaoxia Zhang ,  Ke Liu ,  Kapil Bhattad ,  Taesang Yoo ,  Tao Luo

    IPC分类号： H04W4/00 ,  H04W24/02 ,  H04W48/08 ,  H04W16/14

    CPC分类号： H04W24/02 ,  H04W16/14 ,  H04W48/08

    摘要： Physical-Layer Cell Identifier (PCID) collisions may occur in a wireless network when two neighboring evolved Node Bs (eNBs) having different Global Cell Identifiers (GCID) select identical PCIDs. Evolved Node Bs may uniquely identify themselves by transmitting on a broadcast channel, such as a Physical Broadcast Channel (PBCH), a pattern of bits corresponding to the eNB's GCID. Individual User Equipments (UEs) may recognize the PCID collision by decoding the PBCH payload to identify different GCID-modulated payloads from two eNBs involved in the PCID collision. Alternatively, UEs may detect PCID collisions in the wireless network by monitoring Primary Synchronization Signals (PSS) and Secondary Synchronization Signals (SSS) on the PBCH for identical signals separated by a relatively large time offset. After detecting a PCID collision, the UEs may attempt by best effort to report the PCID collision, may report to a fallback eNB, or the UEs may use special resources on an uplink channel.

    摘要翻译： 当具有不同的全局小区标识符（GCID）的两个相邻演进节点B（eNB）选择相同的PCID时，物理层小区标识符（PCID）冲突可能发生在无线网络中。 演进节点B可以通过在诸如物理广播信道（PBCH）的广播信道上发送与eNB的GCID相对应的比特模式来唯一地标识自身。 个体用户设备（UE）可以通过解码PBCH净荷来识别PCID冲突，从而识别来自涉及PCID冲突的两个eNB的不同GCID调制的有效载荷。 或者，UE可以通过监视PBCH上的主同步信号（PSS）和次同步信号（SSS）来检测无线网络中的PCID冲突，用相对较大的时间偏移分开的相同信号。 在检测到PCID冲突之后，UE可以尽最大努力报告PCID冲突，可以向后退eNB报告，或者UE可以在上行链路信道上使用特殊资源。

    Sample selection for secondary synchronization signal (SSS) detection
    9.
    发明授权
    Sample selection for secondary synchronization signal (SSS) detection 有权
    次同步信号（SSS）检测的采样选择

    公开(公告)号：US08768359B2

    公开(公告)日：2014-07-01

    申请号：US13212812

    申请日：2011-08-18

    申请人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

    发明人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

    IPC分类号： H04W36/00 ,  H04B7/00

    CPC分类号： H04W56/001 ,  H04J11/005 ,  H04J11/0069 ,  H04J11/0093 ,  H04W24/02 ,  H04W72/042

    摘要： Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell.

    摘要翻译： 描述了用于选择二次同步信号（SSS）检测的样本的方法和装置。 提供了多种替代方案用于高效的小区标识符检测。 在第一替代方案中，从采样间隔之间以不均匀的间隔对从小区接收的信号的多个突发进行采样，以确定用于小区识别的序列。 在第二替代方案中，从较强小区接收到的第一和第二信号的样本被取消，并且用于检测较弱小区的序列是通过减少从不重叠的较弱小区接收的第三信号的样本的影响来确定的 具有较强小区的主同步信号（PSS）或SSS。 在第三替代方案中，用于检测较弱小区的序列通过减少对应于来自较强小区的信号的高发射功率部分的任何采样突发的影响来确定。

    SAMPLE SELECTION FOR SECONDARY SYNCHRONIZATION SIGNAL (SSS) DETECTION
    10.
    发明申请
    SAMPLE SELECTION FOR SECONDARY SYNCHRONIZATION SIGNAL (SSS) DETECTION 有权
    用于二次同步信号（SSS）检测的样本选择

    公开(公告)号：US20120046056A1

    公开(公告)日：2012-02-23

    申请号：US13212812

    申请日：2011-08-18

    申请人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

    发明人： Tao Luo ,  Kapil Bhattad ,  Xiaoxia Zhang ,  Taesang Yoo ,  Xiliang Luo ,  Ke Liu

    IPC分类号： H04B7/24

    CPC分类号： H04W56/001 ,  H04J11/005 ,  H04J11/0069 ,  H04J11/0093 ,  H04W24/02 ,  H04W72/042

    摘要： Methods and apparatus for selecting samples for secondary synchronization signal (SSS) detection are described. Several alternatives are provided for efficient cell identifier detection. In a first alternative, multiple bursts of a signal received from a cell are sampled with non-uniform spacing between sampling intervals to determine a sequence for cell identification. In a second alternative, samples of a first and a second signal received from a stronger cell are cancelled, and a sequence for detecting a weaker cell is determined by reducing effects of the samples of a third signal received from the weaker cell which do not overlap with the primary synchronization signal (PSS) or SSS of the stronger cell. In a third alternative, a sequence for detecting a weaker cell is determined by reducing effects of any sampled bursts that correspond to a high transmission power portion of a signal from a stronger cell.

    摘要翻译： 描述了用于选择二次同步信号（SSS）检测的样本的方法和装置。 提供了多种替代方案用于高效的小区标识符检测。 在第一替代方案中，从采样间隔之间以不均匀的间隔对从小区接收的信号的多个突发进行采样，以确定用于小区识别的序列。 在第二替代方案中，从较强小区接收到的第一和第二信号的样本被取消，并且用于检测较弱小区的序列是通过减少从不重叠的较弱小区接收的第三信号的样本的影响来确定的 具有较强小区的主同步信号（PSS）或SSS。 在第三替代方案中，用于检测较弱小区的序列通过减少对应于来自较强小区的信号的高发射功率部分的任何采样突发的影响来确定。