公开(公告)号：US20160269941A1

公开(公告)日：2016-09-15

申请号：US15057272

申请日：2016-03-01

Applicant: NEC Laboratories America, Inc.

Inventor： Eugene Chai ,  Karthikeyan Sundaresan ,  Mohammad Khojastepour ,  Sampath Rangarajan ,  Krishna Garikipati

IPC: H04W28/26 ,  H04L12/26 ,  H04L12/851 ,  H04W28/12 ,  H04L12/801

CPC classification number: H04L47/24 ,  H04L43/0829 ,  H04L43/0852 ,  H04L47/14 ,  H04W28/12 ,  H04W74/0816 ,  H04W80/00 ,  H04W88/10

Abstract: Methods and systems of asynchronous access and synchronous transmission include transmitting an initial reservation packet using a first protocol to prevent other devices that use the first protocol from transmitting during a reserved duration. A carrier using a second protocol is activated. Information is transmitted using a second protocol during the reserved duration. During a last subframe of the reserved duration, an additional reservation packet is transmitted using the first protocol to extend the reserved duration. The transmission of the additional reservation packet takes place while the carrier using the second protocol is still active.

Abstract translation: 异步访问和同步传输的方法和系统包括使用第一协议发送初始预留分组，以防止在保留持续时间期间使用第一协议的其他设备进行传输。 使用第二协议的载波被激活。 在保留期间内使用第二协议发送信息。 在保留持续时间的最后一个子帧期间，使用第一协议传输附加的预留分组以延长预留的持续时间。 当使用第二协议的载波仍然有效时，发生附加预约分组。

公开(公告)号：US20150381335A1

公开(公告)日：2015-12-31

申请号：US14818447

申请日：2015-08-05

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Karthikeyan Sundaresan ,  Eugene Chai ,  Sampath Rangarajan

IPC: H04L5/16 ,  H04B15/00 ,  H04W72/04 ,  H04B7/04 ,  H04L5/00

CPC classification number: H04W52/14 ,  H04B7/022 ,  H04B7/0413 ,  H04B7/0421 ,  H04B7/0456 ,  H04B7/0619 ,  H04B15/00 ,  H04B17/345 ,  H04L5/0048 ,  H04L5/16 ,  H04W52/241 ,  H04W72/0406 ,  H04W72/082

Abstract: A method implemented in an access point (AP) used in a wireless communications system including a first uplink (UL) client device, a second UL client device, and a first downlink (DL) client device is disclosed. The method comprises: receiving, from the first DL client device, first composite channel matrix M1 comprising a first channel matrix and a second channel matrix, wherein the first DL client device estimates the first channel matrix and the second channel matrix. Other methods, systems, and apparatuses also are disclosed.

Abstract translation: 公开了在包括第一上行链路（UL）客户端设备，第二UL客户端设备和第一下行链路（DL）客户端设备的无线通信系统中使用的接入点（AP）中实现的方法。 该方法包括：从第一DL客户端设备接收包括第一信道矩阵和第二信道矩阵的第一复合信道矩阵M1，其中第一DL客户端设备估计第一信道矩阵和第二信道矩阵。 还公开了其它方法，系统和装置。

公开(公告)号：US20150381334A1

公开(公告)日：2015-12-31

申请号：US14818427

申请日：2015-08-05

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Karthikeyan Sundaresan ,  Eugene Chai ,  Sampath Rangarajan

IPC: H04L5/16 ,  H04W72/08 ,  H04B7/04 ,  H04W72/04

CPC classification number: H04W52/14 ,  H04B7/022 ,  H04B7/0413 ,  H04B7/0421 ,  H04B7/0456 ,  H04B7/0619 ,  H04B15/00 ,  H04B17/345 ,  H04L5/0048 ,  H04L5/16 ,  H04W52/241 ,  H04W72/0406 ,  H04W72/082

Abstract: A method implemented in a wireless communications system including a first uplink (UL) client device, a second UL client device, a first downlink (DL) client device, and an access point (AP) is disclosed. The method comprises the following steps in this order: a) determining interference alignment (IA) solution between the first and second UL client devices and the first device; and b) determining, according to the IA solution, receive filter U0 for the AP and precoder V0 for the AP to improve a UL stream rate and a DL stream rate. Other methods, systems, and apparatuses also are disclosed.

Abstract translation: 公开了一种在包括第一上行链路（UL）客户端设备，第二UL客户端设备，第一下行链路（DL）客户端设备和接入点（AP））的无线通信系统中实现的方法。 该方法包括以下步骤：a）确定第一和第二UL客户端设备与第一设备之间的干扰对准（IA）解决方案; 以及b）根据IA解决方案确定接收用于AP的滤波器U0和用于AP的预编码器V0以改善UL流速率和DL流速率。 还公开了其它方法，系统和装置。

公开(公告)号：US20150372743A1

公开(公告)日：2015-12-24

申请号：US14742039

申请日：2015-06-17

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad Khojastepour ,  Karthikeyan Sundaresan

IPC: H04B7/06 ,  H04B15/00 ,  H04L5/14

CPC classification number: H04B7/0634 ,  H04B7/0456 ,  H04B2215/00 ,  H04L5/0023 ,  H04L5/0035 ,  H04L5/0073 ,  H04L5/143 ,  H04L25/03343 ,  H04L25/03898

Abstract: Systems and methods for full-duplex communication in a communications network, including generating a combined channel matrix including two or more channel matrices and determining a null space and a basis for the combined channel matrix. Common, individual, and disjoint vector spaces are determined, and common vector space is determined for each of one or more receiving nodes and each or one or more transmitting nodes, disjoint vector spaces for each of the one or more nodes are determined based on the common vector space for each of the one or more nodes, and individual vector spaces are determined based on the common and the disjoint vector spaces. Signals are mapped at each of the nodes to determine corresponding vector spaces; and interference alignment is performed in common vector spaces and zero forcing in disjoint vector spaces using a hardware processor.

Abstract translation: 包括生成包括两个或更多个信道矩阵并且确定零空间的组合信道矩阵以及组合信道矩阵的基础的用于通信网络中的全双工通信的系统和方法。 确定公共，个体和不相交向量空间，并且为一个或多个接收节点中的每一个确定公共向量空间，并且基于所述一个或多个接收节点确定每个或一个或多个发送节点，所述一个或多个节点中的每一个的不相交向量空间 基于公共和不相交向量空间来确定一个或多个节点中的每一个的公共向量空间以及各个向量空间。 信号被映射到每个节点以确定相应的向量空间; 并且使用硬件处理器在公共向量空间中执行干涉对准并且在不相交的向量空间中执行零强制。

公开(公告)号：US20150117370A1

公开(公告)日：2015-04-30

申请号：US14527801

申请日：2014-10-30

Applicant: NEC Laboratories America, Inc.

Inventor： Narayan Prasad, I ,  Mohammad Khojastepour ,  Mustafa Arslan ,  Karthikeyan Sundaresan ,  Sampath Rangarajan

IPC: H04L5/00 ,  H04B7/04

CPC classification number: H04B7/0626 ,  H04B7/024 ,  H04L5/0035 ,  H04L5/0053 ,  H04L5/0057

Abstract: A wireless communications method implemented in a transmission point (TP) used in a mobile communications system is disclosed. The wireless communications method includes receiving, from a user equipment (UE), short-term channel state information (short-term CSI), processing the short-term CSI, and transmitting, to another TP, the processed short-term CSI. Other methods, systems, and apparatuses also are disclosed.

Abstract translation: 公开了一种在移动通信系统中使用的传输点（TP）中实现的无线通信方法。 无线通信方法包括从用户设备（UE）接收短期信道状态信息（短期CSI），处理短期CSI，并向另一TP发送经处理的短期CSI。 还公开了其它方法，系统和装置。

公开(公告)号：US08976696B2

公开(公告)日：2015-03-10

申请号：US13676865

申请日：2012-11-14

Applicant: NEC Laboratories America, Inc.

Inventor： Karthikeyan Sundaresan ,  Mustafa Y. Arslan ,  Sampath Rangarajan

IPC: H04W72/08 ,  H04W72/04

CPC classification number: H04W72/085 ,  H04W72/046

Abstract: Methods and systems for simultaneous determination of channel resource allocations and beam vectors for uplink frames are disclosed. One method includes receiving batch information from client devices indicating amounts of data to be transmitted on the uplink by the client devices. Further, signal quality can be measured on channel resources for each of the client devices and for each of a plurality of beam vectors. Additionally, rate information for the channel resources for each of the client devices is determined based on signal quality measurements. Moreover, the method includes computing, based on the batch information and the rate information, utilities for allocations of the channel resources to the client devices and for the beam vectors for at least one uplink frame and selecting, based on the utilities, at least one of the beam vectors and at least one of the allocations for transmission of the data on the uplink frame(s).

Abstract translation: 公开了用于同时确定用于上行链路帧的信道资源分配和波束向量的方法和系统。 一种方法包括从客户端设备接收指示客户端设备在上行链路上发送的数据量的批量信息。 此外，可以针对每个客户端设备和多个波束矢量中的每一个的信道资源测量信号质量。 此外，基于信号质量测量来确定用于每个客户端设备的信道资源的速率信息。 此外，该方法包括基于批量信息和速率信息计算用于向客户端设备分配信道资源的用途以及用于至少一个上行链路帧的波束向量的用途，并且基于该实用程序来选择至少一个 的波束矢量和用于在上行链路帧上传输数据的分配中的至少一个。

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：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。

公开(公告)号：US20140023005A1

公开(公告)日：2014-01-23

申请号：US13946499

申请日：2013-07-19

Applicant: NEC Laboratories America, Inc.

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

IPC: H04W72/04

CPC classification number: H04W72/048 ,  H04W4/00 ,  H04W4/50

Abstract: Systems and methods for data transmission include categorizing users into one of a plurality of profiles using a processor based on device and channel characteristics. Each of the plurality of profiles is mapped to one of a plurality of transmission schemes. Data is combined for a plurality of users categorized with different profiles for data transmission.

Abstract translation: 用于数据传输的系统和方法包括使用基于设备和信道特性的处理器将用户分类为多个简档之一。 多个简档中的每个被映射到多个传输方案中的一个。 数据被组合用于被分类用于数据传输的不同简档的多个用户。

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。