FEEDBACK REPORTING BASED ON CHANNEL STATE INFORMATION REFERENCE SIGNAL (CSI-RS) GROUPS
    31.
    发明申请
    FEEDBACK REPORTING BASED ON CHANNEL STATE INFORMATION REFERENCE SIGNAL (CSI-RS) GROUPS 有权
    基于信道状态信息参考信号(CSI-RS)组的反馈报告

    公开(公告)号:US20130021926A1

    公开(公告)日:2013-01-24

    申请号:US13359154

    申请日:2012-01-26

    IPC分类号: H04W24/00 H04W4/00

    CPC分类号: H04L5/0048

    摘要: In macro/RRH setups, channel state information reference signals (CSI-RS) and demodulation reference signals (DM-RS) may be used to decouple control and data transmission. Data transmission (e.g. for LTE Rel 10 and beyond) may be based on CSI-RS and DM-RS, while control may be received from a different set of cells or TxPs via CRS. Certain aspects of the present disclosure introduce a reporting framework, in which configuration of data-serving cells/TxPs may be carried out based on CSI-RS. In certain aspects, a new concept of CSI-RS groups, i.e., a set of CSI-RS ports that a UE considers as one group for precoding matrix indicator (PMI)/channel quality indicator (CQI)/rank indicator (RI) reporting, may be defined.

    摘要翻译: 在宏/ RRH设置中,可以使用信道状态信息参考信号(CSI-RS)和解调参考信号(DM-RS)来去耦合控制和数据传输。 数据传输(例如,对于LTE Rel 10及其以外)可以基于CSI-RS和DM-RS,而可以经由CRS从不同的小区或TxP接收控制。 本公开的某些方面引入了报告框架,其中可以基于CSI-RS来执行数据服务小区/ TxP的配置。 在某些方面,CSI-RS组的新概念,即UE认为一组用于预编码矩阵指示符(PMI)/信道质量指示符(CQI)/秩指示符(RI)报告)的一组CSI-RS端口 ,可以被定义。

    DL MU-MIMO operation in LTE-A
    33.
    发明申请
    DL MU-MIMO operation in LTE-A 有权
    LTE-A中的DL MU-MIMO操作

    公开(公告)号:US20110194593A1

    公开(公告)日:2011-08-11

    申请号:US12857112

    申请日:2010-08-16

    IPC分类号: H04W72/08 H04W24/00

    摘要: Techniques for scheduling UEs are described. In one design, a scheduler (e.g., for a cell) may receive channel direction information (CDI) and channel strength information (CSI) from a plurality of UEs. In one design, the CDI from each UE may include at least one eigenvector, and the CSI from each UE may include at least one singular value corresponding to the at least one eigenvector. The scheduler may schedule at least one UE among the plurality of UEs for data transmission based on the CDI and CSI from the plurality of UEs. The scheduler may select the at least one UE based on a metric related to signal-to-leakage ratio (SLR), or spectral efficiency, etc. In one design, the scheduler may evaluate the performance of different sets of UEs to determine whether to schedule one UE for single-user MIMO or multiple UEs for multi-user MIMO.

    摘要翻译: 描述用于调度UE的技术。 在一种设计中,调度器(例如,用于小区)可以从多个UE接收信道方向信息(CDI)和信道强度信息(CSI)。 在一种设计中,来自每个UE的CDI可以包括至少一个特征向量,并且来自每个UE的CSI可以包括对应于该至少一个特征向量的至少一个奇异值。 调度器可以基于来自多个UE的CDI和CSI来调度多个UE中的至少一个UE进行数据传输。 调度器可以基于与信号泄漏比(SLR)或频谱效率等相关的度量来选择至少一个UE。在一个设计中,调度器可以评估不同组的UE的性能,以确定是否 调度一个UE用于单用户MIMO或多个UE用于多用户MIMO。

    Enforcing constant modulus and finite alphabet properties in adaptive and dual-stage codebooks
    35.
    发明授权
    Enforcing constant modulus and finite alphabet properties in adaptive and dual-stage codebooks 有权
    在自适应和双级码本中实现恒定模量和有限的字母表属性

    公开(公告)号:US09571173B2

    公开(公告)日:2017-02-14

    申请号:US13210052

    申请日:2011-08-15

    IPC分类号: H04B7/02 H04B7/04 H04B7/06

    摘要: Methods and apparatus for enforcing codebook properties (e.g., constant modulus and/or finite alphabet) in adaptive and dual-stage codebooks are described. One example method generally includes receiving multiple feedback aspects of a channel for wireless communications determining multiple codewords based on the multiple feedback aspects, determining a final precoding matrix based on the multiple codewords, enforcing at least one codebook property in at least one of the multiple codewords or the final precoding matrix, applying the final precoding matrix to a plurality of spatial streams to form precoded spatial streams, and transmitting the precoded spatial streams. For certain aspects, enforcing the at least one codebook property includes quantizing elements in each of the multiple codewords and/or the final precoding matrix to the nearest value in a finite alphabet or to increase a performance metric.

    摘要翻译: 描述了在自适应和双级码本中强制码本属性(例如恒定模数和/或有限字母表)的方法和装置。 一个示例性方法通常包括接收用于基于多个反馈方面确定多个码字的无线通信的信道的多个反馈方面,基于多个码字确定最终预编码矩阵,在多个码字中的至少一个中实施至少一个码本属性 或最终预编码矩阵,将最终预编码矩阵应用于多个空间流以形成预编码的空间流,以及发送预编码的空间流。 对于某些方面,强制执行至少一个码本属性包括在多个码字和/或最终预编码矩阵中的每个中将元素量化到有限字母表中的最接近的值,或者增加性能度量。

    Structured MIMO codebook
    37.
    发明授权
    Structured MIMO codebook 有权
    结构化MIMO码本

    公开(公告)号:US08891652B2

    公开(公告)日:2014-11-18

    申请号:US13167209

    申请日:2011-06-23

    摘要: Provided is a method of wireless communication which includes selecting a codebook from a plurality of codebooks in accordance with an antenna characteristic, and transmitting an indication of the selected codebook. Each of the plurality of codebooks is associated with one of a plurality of antenna characteristics. In some designs, channel state information is received from a user equipment. The channel state information may be used to determine downlink scheduling and/or precoding. In some designs, the channel state information may include feedback elements associated with different subband granularity. The feedback elements may also indicate a selection of a subset of precoder column vectors and/or a phase offset between two groups of transmit antennas.

    摘要翻译: 提供了一种无线通信方法,其包括根据天线特性从多个码本中选择码本,并发送所选码本的指示。 多个码本中的每一个与多个天线特性之一相关联。 在一些设计中,从用户设备接收信道状态信息。 信道状态信息可以用于确定下行链路调度和/或预编码。 在一些设计中,信道状态信息可以包括与不同子带粒度相关联的反馈元件。 反馈元件还可以指示预编码器列向量的子集的选择和/或两组发射天线之间的相位偏移。

    METHOD AND APPARATUS FOR ENABLING CHANNEL AND INTERFERENCE ESTIMATIONS IN MACRO/RRH SYSTEM
    39.
    发明申请
    METHOD AND APPARATUS FOR ENABLING CHANNEL AND INTERFERENCE ESTIMATIONS IN MACRO/RRH SYSTEM 有权
    用于在MACRO / RRH系统中实现通道和干扰估计的方法和装置

    公开(公告)号:US20120207043A1

    公开(公告)日:2012-08-16

    申请号:US13336599

    申请日:2011-12-23

    IPC分类号: H04W24/00

    摘要: Aspects disclosed herein relate to channel and interference estimations in a multiple transmission point environment including an eNB and RRHs. In the disclosed aspects, one or more transmission points can signal to a UE to measure channel state conditions based on a first and a second resource pattern. The UE may receive the signaling and perform interference estimation based at least in part on the first resource pattern, and channel estimation based at least in part on the second resource pattern. The UE may generate a channel state report based on the interference and channel estimations, and transmit the channel state report to a transmission point. The eNB may employ the received channel state report in scheduling one or more resources for use by the UE, and may select or adjust network traffic on the first and the second resource pattern, to affect the resulting channel and interference estimation.

    摘要翻译: 本文公开的方面涉及包括eNB和RRH在内的多传输点环境中的信道和干扰估计。 在所公开的方面中,一个或多个传输点可以向UE发信号,以基于第一和第二资源模式测量信道状态条件。 UE可以至少部分地基于第一资源模式接收信令并执行干扰估计,以及至少部分地基于第二资源模式来进行信道估计。 UE可以基于干扰和信道估计产生信道状态报告,并将信道状态报告发送到传输点。 eNB可以使用所接收的信道状态报告来调度一个或多个资源供UE使用,并且可以选择或调整第一和第二资源模式上的网络流量,以影响所得到的信道和干扰估计。

    STRUCTURED MIMO CODEBOOK
    40.
    发明申请
    STRUCTURED MIMO CODEBOOK 有权
    结构化MIMO CODEBOOK

    公开(公告)号:US20120027113A1

    公开(公告)日:2012-02-02

    申请号:US13167209

    申请日:2011-06-23

    IPC分类号: H04L27/28 H04B7/02

    摘要: Provided is a method of wireless communication which includes selecting a codebook from a plurality of codebooks in accordance with an antenna characteristic, and transmitting an indication of the selected codebook. Each of the plurality of codebooks is associated with one of a plurality of antenna characteristics. In some designs, channel state information is received from a user equipment. The channel state information may be used to determine downlink scheduling and/or precoding. In some designs, the channel state information may include feedback elements associated with different subband granularity. The feedback elements may also indicate a selection of a subset of precoder column vectors and/or a phase offset between two groups of transmit antennas.

    摘要翻译: 提供了一种无线通信方法,其包括根据天线特性从多个码本中选择码本,并发送所选码本的指示。 多个码本中的每一个与多个天线特性之一相关联。 在一些设计中,从用户设备接收信道状态信息。 信道状态信息可以用于确定下行链路调度和/或预编码。 在一些设计中,信道状态信息可以包括与不同子带粒度相关联的反馈元件。 反馈元件还可以指示预编码器列向量的子集的选择和/或两组发射天线之间的相位偏移。