公开(公告)号：US08891604B2

公开(公告)日：2014-11-18

申请号：US13629034

申请日：2012-09-27

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad A. Khojastepour ,  Xinyu Zhang ,  Karthikeyan Sundaresan ,  Sampath Rangarajan

IPC: H04B3/46 ,  H04B17/00 ,  H04Q1/20 ,  H04B7/04 ,  H04B7/02

CPC classification number: H04B7/0456 ,  H04B7/024

Abstract: In a multiple-input multiple-output (MIMO) wireless system supporting Coordinated Multi-Point (CoMP) transmission and having a first base station, a second base station, and a user equipment, a communications method implemented in the first base station is disclosed. In an aspect, the communications method includes exchanging, with the second base station through local information exchange, first information about a first channel between the first base station and the user equipment and second information about a second channel between the second base station and the user equipment, and computing at least one of a precoding matrix, a receiver filter, and a projection matrix, wherein the user equipment estimates the first information and the second information, and shares the first information and the second information with the first base station. Other apparatuses and some methods for wireless communications also are disclosed.

Abstract translation: 在支持协调多点（CoMP）传输并具有第一基站，第二基站和用户设备的多输入多输出（MIMO）无线系统中，公开了在第一基站中实现的通信方法 。 一方面，通信方法包括通过本地信息交换与第二基站交换关于第一基站和用户设备之间的第一信道的第一信息和关于第二基站与用户之间的第二信道的第二信息 设备，以及计算预编码矩阵，接收机过滤器和投影矩阵中的至少一个，其中用户设备估计第一信息和第二信息，并与第一基站共享第一信息和第二信息。 还公开了用于无线通信的其它装置和一些方法。

公开(公告)号：US08923907B2

公开(公告)日：2014-12-30

申请号：US13755485

申请日：2013-01-31

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad A. Khojastepour ,  Xinyu Zhang ,  Karthikeyan Sundaresan ,  Sampath Rangarajan

IPC: H04W68/00 ,  H04W4/00 ,  H04W74/00 ,  H04W72/08 ,  H04L1/00 ,  H04L1/06 ,  H04B7/02 ,  H04W74/08 ,  H04B7/04

CPC classification number: H04W74/00 ,  H04B7/024 ,  H04B7/0452 ,  H04L1/0015 ,  H04L1/0026 ,  H04L1/06 ,  H04W72/082 ,  H04W74/08

Abstract: Systems and methods for system for channel access adaptation are disclosed. One system includes a plurality of remote antennas and a plurality of access points. The remote antennas transmit data to receivers and obtain channel state information. Additionally, each access point controls a different cluster of the remote antennas and receives the respective channel state information from the remote antennas of the cluster. Further, each access point is configured to, independently from other access points, adapt channel allocations to the remote antennas of the respective cluster based on a tracking of sums of collision loss probabilities. Each given sum is determined by the access point for a different given set of a plurality of sets of cooperating remote antennas in the respective cluster, where each constituent collision loss probability in the given sum is determined by the access point from a different interference clique to which the given set belongs.

Abstract translation: 公开了用于信道接入适配的系统和方法。 一个系统包括多个远程天线和多个接入点。 远程天线向接收机发送数据并获取信道状态信息。 此外，每个接入点控制远程天线的不同簇，并从群集的远程天线接收相应的信道状态信息。 此外，每个接入点被配置为独立于其他接入点，基于对碰撞丢失概率的和的跟踪来将信道分配调整到相应群集的远程天线。 每个给定的和由相应集群中的多组协作远程天线的不同给定集合的接入点确定，其中给定和中的每个组成冲突丢失概率由接入点由不同的干扰集团确定 给定集合属于哪个。

公开(公告)号：US20130237265A1

公开(公告)日：2013-09-12

申请号：US13755485

申请日：2013-01-31

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： Mohammad A. Khojastepour ,  Xinyu Zhang ,  Karthikeyan Sundaresan ,  Sampath Rangarajan

IPC: H04W74/00

CPC classification number: H04W74/00 ,  H04B7/024 ,  H04B7/0452 ,  H04L1/0015 ,  H04L1/0026 ,  H04L1/06 ,  H04W72/082 ,  H04W74/08

Abstract: Systems and methods for system for channel access adaptation are disclosed. One system includes a plurality of remote antennas and a plurality of access points. The remote antennas transmit data to receivers and obtain channel state information. Additionally, each access point controls a different cluster of the remote antennas and receives the respective channel state information from the remote antennas of the cluster. Further, each access point is configured to, independently from other access points, adapt channel allocations to the remote antennas of the respective cluster based on a tracking of sums of collision loss probabilities. Each given sum is determined by the access point for a different given set of a plurality of sets of cooperating remote antennas in the respective cluster, where each constituent collision loss probability in the given sum is determined by the access point from a different interference clique to which the given set belongs.

Abstract translation: 公开了用于信道接入适配的系统和方法。 一个系统包括多个远程天线和多个接入点。 远程天线向接收机发送数据并获取信道状态信息。 此外，每个接入点控制远程天线的不同簇，并从群集的远程天线接收相应的信道状态信息。 此外，每个接入点被配置为独立于其他接入点，基于对碰撞丢失概率的和的跟踪来将信道分配调整到相应群集的远程天线。 每个给定的和由相应集群中的多组协作远程天线的不同给定集合的接入点确定，其中给定和中的每个组成冲突丢失概率由接入点由不同的干扰集团确定 给定集合属于哪个。

公开(公告)号：US20130170533A1

公开(公告)日：2013-07-04

申请号：US13629034

申请日：2012-09-27

Applicant: Nec Laboratories America, Inc.

Inventor： Mohammad A. Khojastepour ,  Xinyu Zhang ,  Karthikeyan Sundaresan ,  Sampath Rangarajan

IPC: H04B7/04

CPC classification number: H04B7/0456 ,  H04B7/024

Abstract: In a multiple-input multiple-output (MIMO) wireless system supporting Coordinated Multi-Point (CoMP) transmission and having a first base station, a second base station, and a user equipment, a communications method implemented in the first base station is disclosed. In an aspect, the communications method includes exchanging, with the second base station through local information exchange, first information about a first channel between the first base station and the user equipment and second information about a second channel between the second base station and the user equipment, and computing at least one of a precoding matrix, a receiver filter, and a projection matrix, wherein the user equipment estimates the first information and the second information, and shares the first information and the second information with the first base station. Other apparatuses and some methods for wireless communications also are disclosed.

Abstract translation: 在支持协调多点（CoMP）传输并具有第一基站，第二基站和用户设备的多输入多输出（MIMO）无线系统中，公开了在第一基站中实现的通信方法 。 一方面，通信方法包括通过本地信息交换与第二基站交换关于第一基站和用户设备之间的第一信道的第一信息和关于第二基站与用户之间的第二信道的第二信息 设备，以及计算预编码矩阵，接收机过滤器和投影矩阵中的至少一个，其中用户设备估计第一信息和第二信息，并与第一基站共享第一信息和第二信息。 还公开了用于无线通信的其它装置和一些方法。