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    Coordinated multiple point transmission and reception
    11.
    发明授权
    Coordinated multiple point transmission and reception 有权
    协调多点传输和接收

    公开(公告)号：US09148818B2

    公开(公告)日：2015-09-29

    申请号：US13749869

    申请日：2013-01-25

    Applicant: NEC Laboratories America, Inc.

    Inventor： Guosen Yue ,  Narayan Prasad ,  Meilong Jiang ,  Sampath Rangarajan

    IPC: H04W4/00 ,  H04W28/04 ,  H04B7/02 ,  H04B7/04 ,  H04L5/00

    CPC classification number: H04W28/044 ,  H04B7/024 ,  H04B7/0486 ,  H04L5/001 ,  H04L5/0035 ,  H04L5/0044 ,  H04L5/0051 ,  H04W74/085

    Abstract: A method implemented in a mobile communications network supporting coordinated multiple point transmission and reception (CoMP) is disclosed. The method includes transmitting, to a user equipment (UE), data in a physical downlink shared channel (PDSCH), and transmitting a reference signal to the UE, wherein a union of resource elements (REs) allocated for reference signals transmitted from a subset of a plurality of transmission points (TPs) in a CoMP set are excluded from resource mapping for transmitting the data to the UE. Other methods, systems, and apparatuses also are disclosed.

    Abstract translation: 公开了一种在支持协调多点发送和接收（CoMP）的移动通信网中实现的方法。 该方法包括向用户设备（UE）发送物理下行链路共享信道（PDSCH）中的数据，以及向UE发送参考信号，其中分配给用于从子集发送的参考信号的资源元素（RE）的并集 从用于向UE发送数据的资源映射中排除CoMP集合中的多个传输点（TP）。 还公开了其它方法，系统和装置。

    Cloud-based Radio Access Network for Small Cells
    14.
    发明申请
    Cloud-based Radio Access Network for Small Cells 有权
    基于云的小型无线电接入网络

    公开(公告)号：US20140031049A1

    公开(公告)日：2014-01-30

    申请号：US13951396

    申请日：2013-07-25

    Applicant: NEC Laboratories America, Inc.

    Inventor： Karthikeyan Sundaresan ,  Cheng Liu ,  Mustafa Arslan ,  Meilong Jiang ,  Sampath Rangarajan

    IPC: H04W16/02 ,  H04W84/04

    CPC classification number: H04W16/02 ,  H04W16/32 ,  H04W24/02 ,  H04W84/042 ,  H04W88/085

    Abstract: A wireless communications system is disclosed. The system comprises a baseband processing unit (BBU) pool including one or more baseband processing units (BBUs), and a plurality of remote radio heads (RRHs) connected to the BBU pool through a front-haul network, wherein the wireless communications system has a plurality of sectors, each of which includes one or more small cells, each of which is deployed by one of the plurality of RRHs, wherein a BBUs is mapped to two or more RRHs in a sector in a one-to-many configuration, and a BBU is mapped to a single RRH in a sector in a one-to-one configuration, and wherein a combination of the one-to-one configuration and the one-to-many configuration is applied to each sector. Other systems, apparatuses, and methods also are disclosed.

    Abstract translation: 公开了一种无线通信系统。 该系统包括一个包括一个或多个基带处理单元（BBU）的基带处理单元（BBU）池以及通过前端网络连接到BBU池的多个远程无线电头（RRH），其中该无线通信系统具有 多个扇区，每个扇区包括一个或多个小小区，每个小小区由多个RRH中的一个部署，其中BBU被映射到一对多配置中扇区中的两个或更多个RRH， 并且BBU以一对一配置映射到扇区中的单个RRH，并且其中将一对一配置和一对多配置的组合应用于每个扇区。 还公开了其它系统，装置和方法。

    DFT-BASED CHANNEL ESTIMATION SYSTEMS AND METHODS
    15.
    发明申请
    DFT-BASED CHANNEL ESTIMATION SYSTEMS AND METHODS 审中-公开
    基于DFT的信道估计系统和方法

    公开(公告)号：US20130101063A1

    公开(公告)日：2013-04-25

    申请号：US13655073

    申请日：2012-10-18

    Applicant: NEC Laboratories America, Inc.

    Inventor： Meilong Jiang ,  Guosen Yue ,  Narayan Prasad ,  Sampath Rangarajan

    IPC: H04B15/00

    CPC classification number: H04L27/265 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0228

    Abstract: DFT-based channel estimation methods and systems are disclosed. One system includes an inverse discrete Fourier transform module, a noise power estimator, a noise filter and a discrete Fourier transform module. The inverse discrete Fourier transform module is configured to determine time domain estimates by applying an inverse discrete Fourier transform to initial channel estimates computed from pilot signals. Additionally, the noise power estimator is configured to estimate noise power by determining and utilizing time domain samples that are within a vicinity of sinc nulls of the time domain estimates. The noise filter is configured to filter noise from the time domain estimates based on the estimated noise power to obtain noise filtered time domain estimates. Further, the discrete Fourier transform module is configured to perform a discrete Fourier transform on the noise filtered time domain estimates to obtain frequency domain channel estimates for channels on which pilot signals are transmitted.

    Abstract translation: 公开了基于DFT的信道估计方法和系统。 一个系统包括逆离散傅里叶变换模块，噪声功率估计器，噪声滤波器和离散傅里叶变换模块。 逆离散傅立叶变换模块被配置为通过对从导频信号计算的初始信道估计应用逆离散傅里叶变换来确定时域估计。 此外，噪声功率估计器被配置为通过确定和利用在时域估计的sinc空值附近的时域采样来估计噪声功率。 噪声滤波器被配置为基于估计的噪声功率从时域估计中滤除噪声，以获得经噪声滤波的时域估计。 此外，离散傅里叶变换模块被配置为对经噪声滤波的时域估计执行离散付里叶变换，以获得其上发送导频信号的信道的频域信道估计。

    Coordinated multipoint transmission and reception (CoMP)
    17.
    发明授权
    Coordinated multipoint transmission and reception (CoMP) 有权

    公开(公告)号：US08891529B2

    公开(公告)日：2014-11-18

    申请号：US13948409

    申请日：2013-07-23

    Applicant: NEC Laboratories America, Inc.

    Inventor： Guosen Yue ,  Narayan Prasad ,  Meilong Jiang ,  Sampath Rangarajan

    IPC: H04L12/26 ,  H04W4/00 ,  H04W72/04 ,  H04L5/00

    Abstract: A communications method implemented in a transmission point (TP) used in a coordinated multipoint transmission and reception (CoMP) system is disclosed. The communications method comprises transmitting, to a user equipment (UE), attributers for up to four indicators indicating at least physical downlink shared channel (PDSCH) resource element (RE) mapping, and transmitting, to the UE, one of the four indicators, each of which is conveyed in 2 bits, wherein the four indicators comprises ‘00’, ‘01’, ‘10’, and ‘11’ corresponding to a first set, a second set, a third set, and a fourth set of parameters, respectively. Other methods, apparatuses, and systems are also disclosed.

    Feedback and Scheduling for Coordinated Multi-Point (CoMP) Joint Transmission (JT) in Orthogonal Frequency Division Multiple Access (OFDMA)
    18.
    发明申请
    Feedback and Scheduling for Coordinated Multi-Point (CoMP) Joint Transmission (JT) in Orthogonal Frequency Division Multiple Access (OFDMA) 有权
    正交频分多址（OFDMA）中的协调多点（CoMP）联合传输（JT）的反馈和调度

    公开(公告)号：US20140133325A1

    公开(公告)日：2014-05-15

    申请号：US13845623

    申请日：2013-03-18

    Applicant: NEC LABORATORIES AMERICA, INC.

    Inventor： Narayan Prasad ,  Guosen Yue ,  Sampath Rangarajan ,  Meilong Jiang

    IPC: H04W24/08

    CPC classification number: H04B7/024 ,  H04B7/063 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/065 ,  H04L1/0026 ,  H04W72/1231

    Abstract: A method implemented in a user equipment (UE) used in an orthogonal frequency division multiple access (OFDMA) wireless communications system supporting coordinated multi-point (CoMP) joint transmission (JT) is disclosed. The method includes measuring reference signal received power (RSRP), transmitting, to a network, first feedback on the RSRP, receiving, from the network, a CoMP measurement set, conducting pre-scheduling CoMP UE fallback according to the CoMP measurement set, computing channel quality and direction information according to a UE category, and transmitting, to the network, second feedback on the channel quality and direction information. Other methods, apparatuses, and systems also are disclosed.

    Abstract translation: 公开了一种在支持协调多点（CoMP）联合传输（JT）的正交频分多址（OFDMA）无线通信系统中使用的用户设备（UE）中实现的方法。 该方法包括测量参考信号接收功率（RSRP），向网络发送关于RSRP的第一反馈，从网络接收CoMP测量集，根据CoMP测量集进行预调度CoMP UE后退，计算 信道质量和方向信息，并且向网络发送关于信道质量和方向信息的第二反馈。 还公开了其它方法，装置和系统。

    Coordinated Multipoint Transmission and Reception (CoMP)
    19.
    发明申请
    Coordinated Multipoint Transmission and Reception (CoMP) 审中-公开
    协调多点传输和接收（CoMP）

    公开(公告)号：US20140045510A1

    公开(公告)日：2014-02-13

    申请号：US13948388

    申请日：2013-07-23

    Applicant: NEC Laboratories America, Inc.

    Inventor： Guosen Yue ,  Narayan Prasad ,  Meilong Jiang ,  Sampath Rangarajan

    IPC: H04L5/00

    CPC classification number: H04J11/0053 ,  H04B7/024 ,  H04B7/0456 ,  H04B7/063 ,  H04B7/0632 ,  H04L1/0026 ,  H04L1/0068 ,  H04L1/0077 ,  H04L5/0035 ,  H04L5/0044 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0053 ,  H04L5/0057 ,  H04L5/0073 ,  H04L5/0091 ,  H04W24/10 ,  H04W72/042

    Abstract: A communications method implemented in a transmission point (TP) used in a coordinated multipoint transmission and reception (CoMP) system is disclosed. The communications method includes transmitting, to a user equipment (UE), an indication of a channel state information (CSI) process in a CSI pattern comprising a set of CSI processes, wherein the UE is configured with the CSI process for at least one of the other CSI processes in the CSI pattern, and wherein a reported rank indication (RI) for the CSI process is the same as an RI for said at least one of the other CSI processes. Other methods, apparatuses, and systems are also disclosed.

    Abstract translation: 公开了在协调多点发送和接收（CoMP）系统中使用的传输点（TP）中实现的通信方法。 通信方法包括向用户设备（UE）发送包括一组CSI进程的CSI模式中的信道状态信息（CSI）处理的指示，其中，所述UE配置有CSI过程，用于以下各项中的至少一个： CSI模式中的其他CSI进程，并且其中针对所述CSI进程的所报告的秩指示（RI）与所述至少一个其他CSI进程的RI相同。 还公开了其它方法，装置和系统。

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