公开(公告)号：US20140044061A1

公开(公告)日：2014-02-13

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: H04W72/04

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 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.

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。 所述通信方法包括：向用户设备（UE）发送最多指示至少物理下行链路共享信道（PDSCH）资源元素（RE）映射的四个指示符的属性，并向所述UE发送所述四个指示符之一， 其中每一个以2位传送，其中四个指示符包括对应于第一组，第二组，第三组和第四组参数的“00”，“01”，“10”和“11” ， 分别。 还公开了其它方法，装置和系统。

公开(公告)号：US09337906B2

公开(公告)日：2016-05-10

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: H04B7/02 ,  H04L1/00 ,  H04W72/12 ,  H04B7/06

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：US20150288434A1

公开(公告)日：2015-10-08

申请号：US14744496

申请日：2015-06-19

Applicant: NEC Laboratories America, Inc.

Inventor： Narayan Prasad ,  Guosen Yue ,  Mohammad A. Khojastepour ,  Meilong Jiang ,  Sampath Rangarajan

IPC: H04B7/04 ,  H04L27/00 ,  H04J11/00 ,  H04W72/04 ,  H04L5/00

CPC classification number: H04B7/0452 ,  H04J11/0046 ,  H04L5/0023 ,  H04L25/03331 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/34 ,  H04W72/042 ,  H04W72/12

Abstract: A method implemented in a user equipment used in a wireless communications system is disclosed. The method comprises receiving from a base station an indication of a first modulation type for the user equipment, receiving from the base station a first data signal for the user equipment, receiving from the base station an indication of a minimum time-frequency unit that is assigned to another user equipment, receiving a second data signal for said another user equipment, where a second modulation type for said another user equipment is unknown to the user equipment, and cancelling and suppressing interference by using the minimum time-frequency unit. Other methods, systems, and apparatuses also are disclosed.

Abstract translation: 公开了一种在无线通信系统中使用的用户设备中实现的方法。 该方法包括从基站接收用户设备的第一调制类型的指示，从基站接收用户设备的第一数据信号，从基站接收最小时间频率单元的指示，该最小时间频率单位是 分配给另一用户设备，接收用于所述另一用户设备的第二数据信号，其中所述另一用户设备的第二调制类型对于用户设备是未知的，并且通过使用最小时间频率单元来消除和抑制干扰。 还公开了其它方法，系统和装置。

公开(公告)号：US09125047B2

公开(公告)日：2015-09-01

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: H04W80/04 ,  H04W16/02 ,  H04W84/04 ,  H04W24/02 ,  H04W16/32 ,  H04W88/08

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。

公开(公告)号：US20140219379A1

公开(公告)日：2014-08-07

申请号：US14247643

申请日：2014-04-08

Applicant: NEC Laboratories America, Inc.

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

IPC: H04B7/04 ,  H04L1/18

CPC classification number: H04B7/0456 ,  H04L1/0618 ,  H04L1/1896 ,  H04L25/03343 ,  H04L2025/03426

Abstract: A method implemented in a user terminal is disclosed. The method comprises obtaining known precoding matrix P of rank r and modulation and coding scheme assignments used in an original transmission, and a desired retransmission rank r′, forming an approximate channel covariance matrix, estimating a minimum mean square error receiver SINR for each layer to be retransmitted responsive to said forming, and finding a retransmission precoding matrix from a preceding codebook that maximizes a sum-rate for enabling precoding selections for retransmissions in uplink multiple-input multiple-output MIMO hybrid automatic repeat request HARQ. Other methods, apparatuses, and systems also are disclosed.

Abstract translation: 公开了一种在用户终端中实现的方法。 该方法包括获得秩r的已知预编码矩阵P以及在原始传输中使用的调制和编码方案分配以及期望的重传秩r'，形成近似信道协方差矩阵，估计每层的最小均方误差接收机SINR 响应于所述形成重新发送，并从上一个码本中找到重新发送预编码矩阵，其使在上行链路多输入多输出MIMO混合自动重传请求HARQ中进行重新发送的预编码选择最大化的和速率。 还公开了其它方法，装置和系统。

公开(公告)号：US09025692B2

公开(公告)日：2015-05-05

申请号：US14247643

申请日：2014-04-08

Applicant: NEC Laboratories America, Inc.

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

IPC: H04L27/00 ,  H04B7/04 ,  H04L25/03 ,  H04L1/18 ,  H04L1/06

CPC classification number: H04B7/0456 ,  H04L1/0618 ,  H04L1/1896 ,  H04L25/03343 ,  H04L2025/03426

Abstract: A method implemented in a user terminal is disclosed. The method comprises obtaining known precoding matrix P of rank r and modulation and coding scheme assignments used in an original transmission, and a desired retransmission rank r′, forming an approximate channel covariance matrix, estimating a minimum mean square error receiver SINR for each layer to be retransmitted responsive to said forming, and finding a retransmission precoding matrix from a preceding codebook that maximizes a sum-rate for enabling precoding selections for retransmissions in uplink multiple-input multiple-output MIMO hybrid automatic repeat request HARQ. Other methods, apparatuses, and systems also are disclosed.

Abstract translation: 公开了一种在用户终端中实现的方法。 该方法包括获得秩r的已知预编码矩阵P以及在原始传输中使用的调制和编码方案分配以及期望的重传秩r'，形成近似信道协方差矩阵，估计每层的最小均方误差接收机SINR 响应于所述形成重新发送，并从上一个码本中找到重新发送预编码矩阵，其使在上行链路多输入多输出MIMO混合自动重传请求HARQ中进行重新发送的预编码选择最大化的和速率。 还公开了其它方法，装置和系统。

公开(公告)号：US20140341064A1

公开(公告)日：2014-11-20

申请号：US14449307

申请日：2014-08-01

Applicant: NEC Laboratories America, Inc.

Inventor： Narayan Prasad ,  Guosen Yue ,  Meilong Jiang ,  Mohammad A. Khojastepour ,  Sampath Rangarajan

IPC: H04W24/10 ,  H04B7/04

CPC classification number: H04W24/10 ,  H04B7/0417 ,  H04B7/0452 ,  H04B7/0469 ,  H04B7/0486 ,  H04B7/0626 ,  H04B7/063 ,  H04B7/065

Abstract: A method implemented in a user equipment configured to be used in a multi-user (MU) multiple-input multiple-output (MIMO) wireless communications system is disclosed. The method includes transmitting to a base station a first channel state information (CSI) report determined according to a single-user (SU) MIMO rule, and transmitting to the base station a second CSI report determined according to an MU-MIMO rule. Other methods, apparatuses, and systems also are disclosed.

Abstract translation: 公开了一种在配置成在多用户（MU）多输入多输出（MIMO）无线通信系统中使用的用户设备中实现的方法。 该方法包括向基站发送根据单用户（SU）MIMO规则确定的第一信道状态信息（CSI）报告，以及向基站发送根据MU-MIMO规则确定的第二CSI报告。 还公开了其它方法，装置和系统。

公开(公告)号：US20140233414A1

公开(公告)日：2014-08-21

申请号：US14248048

申请日：2014-04-08

Applicant: NEC Laboratories America, Inc.

Inventor： Narayan Prasad ,  Guosen Yue ,  Mohammad A. Khojastepour ,  Meilong Jiang ,  Sampath Rangarajan

IPC: H04W24/08

CPC classification number: H04W24/08 ,  H04B7/0452 ,  H04B7/0465 ,  H04B7/0486 ,  H04W52/346 ,  H04W72/0406 ,  H04W72/085

Abstract: A method for determining attributes of communication channels of multi-user (MU)-multiple input multiple output (MIMO) users in an orthogonal frequency division multiplexing based multiple access (OFDMA) system is disclosed. The method comprises receiving from a base station, for at least one sub-band of contiguous sub-carriers, an indication of an estimate of or an upper-bound on a total number of streams that are co-scheduled by the base station on the at least one sub-band or an indication of a fraction of a transmit power at the base station that is applied to streams that are scheduled for transmission to a particular user, determining one or more signal quality measures for the at least one sub-band based on at least one of the fraction or the estimate of or the upper-bound on the total number of streams that are scheduled by the base station on the at least one sub-band, and transmitting to the base station an indication of the one or more signal quality measures. Other methods, apparatuses, and systems also are disclosed.

Abstract translation: 公开了一种用于在基于正交频分复用的多址（OFDMA）系统中确定多用户（MU） - 多输入多输出（MIMO））用户的通信信道的属性的方法。 该方法包括从基站接收对于连续子载波的至少一个子带，在基站上共同调度的流的总数的估计或上限的指示 至少一个子带或基站处的发射功率的一小部分的指示，其被施加到被调度用于传输到特定用户的流，确定用于所述至少一个子带的一个或多个信号质量度量 基于由所述基站在所述至少一个子带上调度的流的总数的分数或估计或上限中的至少一个，并且向所述基站发送所述一个的所述一个 或更多的信号质量措施。 还公开了其它方法，装置和系统。

公开(公告)号：US20140226745A1

公开(公告)日：2014-08-14

申请号：US14258378

申请日：2014-04-22

Applicant: NEC Laboratories America, Inc.

Inventor： Narayan Prasad ,  Guosen Yue ,  Mohammad A. Khojastepour ,  Meilong Jiang ,  Sampath Rangarajan

IPC: H04B7/04 ,  H04L27/34

CPC classification number: H04B7/0452 ,  H04J11/0046 ,  H04L5/0023 ,  H04L25/03331 ,  H04L27/0008 ,  H04L27/0012 ,  H04L27/34 ,  H04W72/042 ,  H04W72/12

Abstract: A method implemented in a user equipment used in a multi-user multiple input multiple output (MU-MIMO) wireless communications system is disclosed. The method includes receiving from a base station an indication of a first modulation type for the user equipment, receiving a first data signal for the user equipment, receiving a second data signal for a co-scheduled user equipment, where a second modulation type for the co-scheduled user equipment is unknown to the user equipment, and deciding the second modulation type. Other methods, systems, and apparatuses also are disclosed.

Abstract translation: 公开了一种在多用户多输入多输出（MU-MIMO）无线通信系统中使用的用户设备中实现的方法。 该方法包括从基站接收用户设备的第一调制类型的指示，接收用户设备的第一数据信号，为共同调度的用户设备接收第二数据信号，其中第二调制类型为 共同调度的用户设备对于用户设备是未知的，并且确定第二调制类型。 还公开了其它方法，系统和装置。

公开(公告)号：US20130229992A1

公开(公告)日：2013-09-05

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: H04W28/04

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。