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.

公开(公告)号：US20140241449A1

公开(公告)日：2014-08-28

申请号：US14198653

申请日：2014-03-06

Applicant: NEC Laboratories America, Inc.

Inventor： Narayan Prasad ,  Guosen Yue ,  Mohammad Khojastepour ,  Sampath Rangarajan

IPC: H04L25/03

CPC classification number: H04B7/0469 ,  H04B7/0456 ,  H04B7/0478 ,  H04B7/0486 ,  H04B7/0617 ,  H04B7/0626 ,  H04B7/0641 ,  H04B7/065 ,  H04L1/06 ,  H04L25/0391 ,  H04L27/20

Abstract: A method implemented in a base station used in a wireless communications system is disclosed. The method comprises having a codebook including a plurality of precoding matrices, precoding data with one of the plurality of precoding matrices, and transmitting, to a user equipment, the precoded data, wherein each precoding matrix W satisfies W=W(1)W(2), where first matrix W(1) is chosen from first codebook (1), and second matrix W(2) is chosen from a second codebook. Other apparatuses, systems, and methods also are disclosed.

Abstract translation: 公开了一种在无线通信系统中使用的基站中实现的方法。 该方法包括具有包括多个预编码矩阵的码本，与多个预编码矩阵之一进行预编码数据，并向用户设备发送预编码数据，其中每个预编码矩阵W满足W = W（1）W（ 2），其中从第一码本（1）中选择第一矩阵W（1），并且从第二码本中选择第二矩阵W（2）。 还公开了其他装置，系统和方法。

公开(公告)号：US08767665B2

公开(公告)日：2014-07-01

申请号：US13967582

申请日：2013-08-15

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad A. Khojastepour ,  Narayan Prasad ,  Sampath Rangarajan

IPC: H04B7/02 ,  H04B7/04 ,  H04L5/00 ,  H04B7/06

CPC classification number: H04B7/0452 ,  H04B7/0632 ,  H04B7/0639 ,  H04B7/0665 ,  H04L5/0023 ,  H04L5/0094

Abstract: A method implemented in a base station used in a wireless communications system is disclosed. The method comprises transmitting an index indicating data stream parameters, and transmitting an indication of the number of transmit antennas at the base station, wherein the data stream parameters for 8 transmit antennas are indicated by the index according to a first table, and wherein the data stream parameters for 4 transmit antennas are indicated by the index according to a second table. Other methods, apparatuses, and systems also are disclosed.

Abstract translation: 公开了一种在无线通信系统中使用的基站中实现的方法。 该方法包括发送指示数据流参数的索引，以及发送在基站处的发射天线数量的指示，其中根据第一表由索引指示8个发射天线的数据流参数，并且其中数据 4个发射天线的流参数由第二个表的索引表示。 还公开了其它方法，装置和系统。

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。

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。

公开(公告)号：US20130242926A1

公开(公告)日：2013-09-19

申请号：US13888785

申请日：2013-05-07

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： Narayan Prasad ,  Mohammad Ali Khojastepour ,  Meilong Jiang ,  Xiaodong Wang ,  Sampath Rangarajan

IPC: H04W72/12

CPC classification number: H04W72/04 ,  H04B7/0452 ,  H04B7/0639 ,  H04B7/066 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/20 ,  H04L5/0007 ,  H04L25/0208 ,  H04W8/26 ,  H04W28/04 ,  H04W52/346 ,  H04W72/0446 ,  H04W72/12 ,  H04W72/1231 ,  H04W72/1289

Abstract: A method implemented in a base station for conveying scheduling information in an orthogonal frequency division multiple access (OFDMA) multi-user (MU)-multiple input multiple output (MIMO) system is disclosed. The method includes transmitting to a first user equipment (UE) the scheduling information including first scheduling information of the first UE and at least a portion of second scheduling information of at least one second UE, wherein the scheduling information includes a resource block (RB) assigned to the first UE, the number of streams, and an indication of one or more dedicated reference symbol (RS) layers assigned to the first UE. Other methods, systems, and apparatuses also are disclosed.

Abstract translation: 公开了一种在基站中实现的用于在正交频分多址（MIMO）多用户（MU）多输入多输出（MIMO））系统中传送调度信息的方法。 该方法包括向第一用户设备（UE）发送包括第一UE的第一调度信息和至少一个第二UE的第二调度信息的至少一部分的调度信息，其中调度信息包括资源块（RB） 分配给第一UE，流的数量以及分配给第一UE的一个或多个专用参考符号（RS）层的指示。 还公开了其它方法，系统和装置。