公开(公告)号：US20120046056A1

公开(公告)日：2012-02-23

申请号：US13212812

申请日：2011-08-18

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

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

IPC: H04B7/24

CPC classification number: H04W56/001 ,  H04J11/005 ,  H04J11/0069 ,  H04J11/0093 ,  H04W24/02 ,  H04W72/042

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20120039220A1

公开(公告)日：2012-02-16

申请号：US13210083

申请日：2011-08-15

Applicant: Wanshi Chen ,  Juan Montojo ,  Tao Luo ,  Kapil Bhattad ,  Peter Gaal

Inventor： Wanshi Chen ,  Juan Montojo ,  Tao Luo ,  Kapil Bhattad ,  Peter Gaal

IPC: H04W72/08 ,  H04W88/04

CPC classification number: H04L5/0053 ,  H04B7/2606 ,  H04W72/042 ,  H04W84/047

Abstract: Certain aspects of the present disclosure provide methods and apparatus for interleaving control information for one or more nodes. For certain aspects, the control information may comprise one or more Relay Physical Downlink Control Channels (R-PDCCHs) for one or more relay nodes. The interleaving may comprise interleaving Common Reference Signal (CRS)-based R-PDCCH, wherein the resource elements (REs) for CRS and/or Channel State Information Reference Signal (CSI-RS) may be discounted in a physical resource block (PRB).

Abstract translation: 本公开的某些方面提供了用于交织一个或多个节点的控制信息的方法和装置。 对于某些方面，控制信息可以包括用于一个或多个中继节点的一个或多个中继物理下行链路控制信道（R-PDCCH）。 交织可以包括基于公共参考信号（CRS）的R-PDCCH的交织，其中用于CRS和/或信道状态信息参考信号（CSI-RS）的资源元素（RE）可以在物理资源块（PRB） 。

公开(公告)号：US20120027054A1

公开(公告)日：2012-02-02

申请号：US13194731

申请日：2011-07-29

Applicant: Ravi Palanki ,  Dexu Lin ,  Kapil Bhattad ,  Dhananjay Ashok Gore

Inventor： Ravi Palanki ,  Dexu Lin ,  Kapil Bhattad ,  Dhananjay Ashok Gore

IPC: H04W88/04 ,  H04B7/02 ,  H04L27/28 ,  H04B7/14

CPC classification number: H04B7/15571 ,  H04B7/0671 ,  H04B7/084 ,  H04B7/0857 ,  H04B7/0894 ,  H04B7/10 ,  H04B7/155

Abstract: Systems and methodologies are described that enable serving cell selection in a wireless network with a multiple antenna repeater operable to support MIMO communications. In one example, a repeater using orthogonal frequency division multiplexing on the downlink can be equipped to receive, by one or more receive antennas, one or more signals using one or more radio frequency (RF) isolation schemes. The repeater can further be equipped to amplify and delay the one or more signals using one or more combination schemes. Moreover, the repeater can be equipped to transmit, by one or more transmit antennas, the amplified and delayed one or more signals, wherein at least one of the one or more receive antennas or the one or more transmit antennas includes two or more antennas.

Abstract translation: 描述了能够利用可操作以支持MIMO通信的多天线中继器在无线网络中服务小区选择的系统和方法。 在一个示例中，在下行链路上使用正交频分复用的中继器可以被配置成通过一个或多个接收天线使用一个或多个射频（RF）隔离方案来接收一个或多个信号。 中继器还可以被配置成使用一个或多个组合方案来放大和延迟一个或多个信号。 此外，中继器可以被配置成通过一个或多个发射天线发射放大和延迟的一个或多个信号，其中一个或多个接收天线或一个或多个发射天线中的至少一个包括两个或更多个天线。

公开(公告)号：US20120020433A1

公开(公告)日：2012-01-26

申请号：US13011595

申请日：2011-01-21

Applicant: Kapil Bhattad ,  Peter Gaal ,  Alexei Yurievitch Gorokhov ,  Juan Montojo

Inventor： Kapil Bhattad ,  Peter Gaal ,  Alexei Yurievitch Gorokhov ,  Juan Montojo

IPC: H04L25/49

CPC classification number: H04B7/0417 ,  H04B7/0452 ,  H04B7/0639

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided in which a precoding matrix is determined from a set of precoding matrices with a first throughput based on a reference signal. In addition, a subset of precoding matrices is determined from the set of precoding matrices with a second throughput greater than a fraction of the first throughput based on the reference signal. Furthermore, a precoding matrix is selected from the subset of precoding matrices based on a metric.

Abstract translation: 提供了一种用于无线通信的方法，装置和计算机程序产品，其中，从具有基于参考信号的第一吞吐量的一组预编码矩阵确定预编码矩阵。 另外，根据基于参考信号的第二吞吐量大于第一吞吐量的一部分的预编码矩阵集来确定预编码矩阵的子集。 此外，基于度量从预编码矩阵的子集中选择预编码矩阵。

公开(公告)号：US20100255790A1

公开(公告)日：2010-10-07

申请号：US12750423

申请日：2010-03-30

Applicant: Amir Farajidana ,  Alexei Gorokhov ,  Kapil Bhattad

Inventor： Amir Farajidana ,  Alexei Gorokhov ,  Kapil Bhattad

IPC: H04B7/02 ,  H04B7/00

CPC classification number: H04B7/0695 ,  H04B17/26

Abstract: A method for transmission beamforming is disclosed. One or more channel knowledge metrics are obtained for one or more channels. A confidence level of each channel knowledge metric is determined. Beamforming specifications are selected based on the channel knowledge metrics and the confidence levels. A signal stream is transmitted on the one or more channels using the selected beamforming specifications.

Abstract translation: 公开了一种用于发射波束形成的方法。 获得一个或多个信道的一个或多个信道知识度量。 确定每个渠道知识度量的置信水平。 基于信道知识度量和置信水平来选择波束形成规范。 使用所选择的波束成形规格在一个或多个信道上发送信号流。

公开(公告)号：US20100075706A1

公开(公告)日：2010-03-25

申请号：US12561984

申请日：2009-09-17

Applicant: Juan Montojo ,  Ravi Palanki ,  Amir Farajidana ,  Kapil Bhattad

Inventor： Juan Montojo ,  Ravi Palanki ,  Amir Farajidana ,  Kapil Bhattad

IPC: H04B7/00

CPC classification number: H04B7/061 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0634 ,  H04B7/0671 ,  H04B7/0691 ,  H04B7/0874 ,  H04L5/0091 ,  H04W72/1273

Abstract: Systems and methodologies are described that facilitate creating antenna ports to correspond to two or more groups of user equipment (UEs). The subject innovation can organize two or more groups of user equipment and signal to each of the two or more groups a respective antenna port. The subject innovation can further communicate mapping information, a reference signal, or delay related to a linear combination in order to identify antenna ports. Based on such communicated information, the reference signal can be decoded in order to identify each antenna port.

Abstract translation: 描述了有助于创建天线端口以对应于两组或多组用户设备（UE）的系统和方法。 本发明可以组织两组或多组用户设备并且向相应的天线端口中的两个或更多个组中的每个组发送信号。 本发明可以进一步传送映射信息，参考信号或与线性组合相关的延迟，以便识别天线端口。 基于这样传送的信息，可以对参考信号进行解码，以识别每个天线端口。

公开(公告)号：US20100008317A1

公开(公告)日：2010-01-14

申请号：US12499425

申请日：2009-07-08

Applicant: Kapil Bhattad ,  Ravi Palanki

Inventor： Kapil Bhattad ,  Ravi Palanki

IPC: H04W40/16 ,  H04B17/00

CPC classification number: H04W72/005 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0007 ,  H04L5/0053 ,  H04L5/0073 ,  H04W16/10 ,  H04W48/12 ,  H04W72/0453 ,  H04W72/08 ,  H04W84/045

Abstract: Techniques for supporting communication in a dominant interference scenario are described. A user equipment (UE) may communicate with a first base station and may observe high interference from and/or may cause high interference to a second base station. In one design, the first base station may use a first frequency band, which may overlap at least partially with a second frequency band for the second base station and may further extend beyond the second frequency band. The first base station may send at least one synchronization signal and a broadcast channel in a center portion of the first frequency band for use by UEs to detect the first base station. The second frequency band may be non-overlapping with the center portion of the first frequency band. The first base station may also communicate with at least one UE on the first frequency band.

Abstract translation: 描述了支配主导干扰场景中通信的技术。 用户设备（UE）可以与第一基站进行通信，并且可以观察到高干扰和/或可能对第二基站造成高干扰。 在一种设计中，第一基站可以使用第一频带，其可以至少部分地与第二基站的第二频带重叠，并且可以进一步延伸超过第二频带。 第一基站可以在第一频带的中心部分发送至少一个同步信号和广播信道，供UE使用以检测第一基站。 第二频带可以与第一频带的中心部分不重叠。 第一基站还可以与第一频带上的至少一个UE进行通信。

公开(公告)号：US09867203B2

公开(公告)日：2018-01-09

申请号：US12499432

申请日：2009-07-08

Applicant: Kapil Bhattad ,  Ravi Palanki

Inventor： Kapil Bhattad ,  Ravi Palanki

IPC: H04L12/26 ,  H04W72/08 ,  H04W16/14 ,  H04J11/00 ,  H04J3/02 ,  H04W16/32

CPC classification number: H04W72/082 ,  H04J3/02 ,  H04J11/005 ,  H04J11/0069 ,  H04W16/14 ,  H04W16/32

Abstract: Techniques for supporting communication in a heterogeneous network are described. In an aspect, communication in a dominant interference scenario may be supported by reserving subframes for a weaker base station observing high interference from a strong interfering base station. In another aspect, interference due to a first reference signal from a first station (e.g., a base station) may be mitigated by canceling the interference at a second station (e.g., a UE) or by selecting different resources for sending a second reference signal by the second station (e.g., another base station) to avoid collision with the first reference signal. In yet another aspect, a relay may transmit in an MBSFN mode in subframes that it listens to a macro base station and in a regular mode in subframes that it transmits to UEs. In yet another aspect, a station may transmit more TDM control symbols than a dominant interferer.

公开(公告)号：US09565011B2

公开(公告)日：2017-02-07

申请号：US12792121

申请日：2010-06-02

Applicant: Ravi Palanki ,  Aamod Dinkar Khandekar ,  Kapil Bhattad

Inventor： Ravi Palanki ,  Aamod Dinkar Khandekar ,  Kapil Bhattad

IPC: H04L5/00

CPC classification number: H04L5/0091 ,  H04L5/0053 ,  H04L5/0055 ,  Y02D70/122 ,  Y02D70/124 ,  Y02D70/126 ,  Y02D70/14

Abstract: Techniques for supporting communication in dominant interference scenarios are described. In an aspect, communication in a dominant interference scenario may be supported with cross-subframe control. Different base stations may be allocated different subframes for sending control information. Each base station may send control messages in the subframes allocated to that base station. Different base stations may have different timelines for sending control messages due to their different allocated subframes. With cross-subframe control, control information (e.g., grants, acknowledgement, etc.) may be sent in a first subframe and may be applicable for data transmission in a second subframe, which may be a variable number of subframes from the first subframe. In another aspect, messages to mitigate interference may be sent on a physical downlink control channel (PDCCH).

Abstract translation: 描述了在主要干扰场景中支持通信的技术。 在一方面，可以通过跨子帧控制来支持主要干扰场景中的通信。 可以为不同的基站分配不同的子帧以发送控制信息。 每个基站可以在分配给该基站的子帧中发送控制消息。 不同的基站可能具有不同的时间线，用于由于其不同的分配子帧而发送控制消息。 利用跨子帧控制，可以在第一子帧中发送控制信息（例如，授权，确认等），并且可以适用于第二子帧中的数据传输，其可以是来自第一子帧的可变数量的子帧。 在另一方面，可以在物理下行链路控制信道（PDCCH）上发送用于减轻干扰的消息。

公开(公告)号：US09369885B2

公开(公告)日：2016-06-14

申请号：US13269408

申请日：2011-10-07

Applicant: Kapil Bhattad ,  Ke Liu ,  Tao Luo ,  Yongbin Wei

Inventor： Kapil Bhattad ,  Ke Liu ,  Tao Luo ,  Yongbin Wei

IPC: H04B1/00 ,  H04J11/00 ,  H04B7/00 ,  H04W24/02 ,  H04L27/26 ,  H04L5/00 ,  H04L25/02 ,  H04W84/04

CPC classification number: H04W24/02 ,  H03G1/02 ,  H04L5/0053 ,  H04L25/0202 ,  H04L27/2601 ,  H04W84/045

Abstract: Methods and apparatuses are provided that include selecting reference signal (RS) or other tones to utilize in estimating a channel for decoding one or more channels. Where the RS tones are interfered by other base stations, interference cancelation can be performed over the RS tones. Since interference can vary over the tones, interference cancelation can yield RS tones of varying quality. Thus, a quality of each of the RS tones can be determined, and at least a subset of the RS tones can be selected for estimating a channel. Additionally or alternatively, the RS tones can be weighted or otherwise classified for performing channel estimation using the RS tones.