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    Energy efficient downlink scheduling in LTE-advanced networks
    2.
    发明授权
    Energy efficient downlink scheduling in LTE-advanced networks 有权

    公开(公告)号：US10206169B2

    公开(公告)日：2019-02-12

    申请号：US15255288

    申请日：2016-09-02

    申请人： NEC Laboratories America, Inc.

    发明人： Narayan Prasad ,  Sampath Rangarajan ,  Hajar Mahdavi-Doost

    IPC分类号： H04W52/02 ,  H04W72/12 ,  H04W72/04

    摘要： A method is provided for performing downlink scheduling in Long Term Evolution-Advanced networks. The method includes assigning resource blocks and transmission modes to users such that (i) each of the users that is assigned at least one of the resource blocks is assigned only one transmission mode chosen from a finite set of transmission modes, (ii) a sum of normalized costs across all of the resource blocks that are assigned to the users is less than unity. The method further includes incorporating a resource block and transmission mode assignment for a user into downlink scheduler of a base station to cause the downlink scheduler to perform downlink scheduling in accordance with the resource block and transmission mode assignment.

    Link Packing in mmWave Networks
    4.
    发明申请
    Link Packing in mmWave Networks 审中-公开

    公开(公告)号：US20180084600A1

    公开(公告)日：2018-03-22

    申请号：US15678681

    申请日：2017-08-16

    申请人： NEC Laboratories America, Inc.

    发明人： Narayan Prasad ,  Mohammad Khojastepour ,  Sampath Rangarajan ,  Yasaman Ghasempour

    IPC分类号： H04W76/04 ,  H04W24/08 ,  H04B17/336

    CPC分类号： H04W76/20 ,  H04B17/336 ,  H04W24/08

    摘要： A computer-implemented method for establishing communication links in a millimeter wave (mmWave) network by solving a linear integer packing problem is presented. The computer-implemented method includes determining active communication links between a plurality of transmitters and a plurality of receivers, setting each active communication link to have any arbitrary chosen weight or priority, and setting a minimum link quality threshold for each active communication link and subjecting each active communication link to constraints. Detected phantom constraints are mitigated by introducing new constraints with binary coefficients and by modifying one or more existing constraints by setting a number of coefficients within the existing constraints to zero.

    Exploiting cell dormancy and load balancing in LTE HetNets
    6.
    发明授权
    Exploiting cell dormancy and load balancing in LTE HetNets 有权
    在LTE HetNets中利用单元休眠和负载均衡

    公开(公告)号：US09420493B2

    公开(公告)日：2016-08-16

    申请号：US14499219

    申请日：2014-09-28

    申请人： NEC Laboratories America, Inc.

    发明人： Narayan Prasad ,  Mustafa Arslan ,  Sampath Rangarajan

    IPC分类号： H04J1/16 ,  H04W28/08 ,  H04W84/04

    CPC分类号： H04W28/08 ,  H04W84/045

    摘要： At a coarse time-scale, at the start of each frame the choice of TPs to be made active and users to associate with the active TPs are determined by solving an optimization problem. The inputs to the optimization problem are averaged slowly varying metrics that are relevant for a period longer than the backhaul latency. At a the fine time-scale, in each slot each active TP independently does scheduling over the set of users associated with it, without any coordination with any of the other active TPs, based on fast changing information, such as instantaneous rate or SINR estimates.

    摘要翻译： 在粗略的时间尺度上，在每个帧的开始，通过求解优化问题来确定要激活的TP的选择和用户与活动的TP相关联。 对优化问题的输入是平均缓慢变化的度量，其与回程延迟时间长度相关。 在精细的时间尺度上，在每个时隙中，每个活动TP独立地对与其相关联的用户集合进行调度，而不需要基于快速变化的信息（例如瞬时速率或SINR估计）与任何其他活动TP的任何协调 。

    STANDARDS COMPLIANT COORDINATED MULTI-POINT SCHEDULING OVER LTE HETEROGENEOUS WIRELESS NETWORKS
    7.
    发明申请
    STANDARDS COMPLIANT COORDINATED MULTI-POINT SCHEDULING OVER LTE HETEROGENEOUS WIRELESS NETWORKS 有权
    标准在LTE异质无线网络上的合规多点调度

    公开(公告)号：US20160233994A1

    公开(公告)日：2016-08-11

    申请号：US15015333

    申请日：2016-02-04

    申请人： NEC Laboratories America, Inc.

    发明人： Narayan Prasad ,  Sampath Rangarajan ,  Yasushi Maruta ,  Duong Pham ,  Arun Gurung ,  Caroline Liang ,  Patricia Wells ,  Robert Arnott

    IPC分类号： H04L5/00 ,  H04W72/04 ,  H04W72/08 ,  H04W72/06 ,  H04W24/02

    CPC分类号： H04L5/0035 ,  H04B7/024 ,  H04B7/0626 ,  H04L5/0057 ,  H04L5/006 ,  H04L5/0064 ,  H04W24/02 ,  H04W72/0406 ,  H04W72/06 ,  H04W72/082 ,  H04W72/085 ,  H04W84/042 ,  H04W88/02 ,  H04W88/08

    摘要： A method and transmitting device are provided for coordinated multi-point transmission scheduling by a transmitting device over one or more heterogeneous wireless networks that include a set of clusters. Each of the clusters has a set of transmission points for serving a set of user equipment devices. The method includes determining constraints imposed on any of the user equipment devices. The method further includes receiving channel state information feedback from the user equipment devices. The method also includes obtaining user weights and buffer sizes. The method additionally includes iteratively determining a weighted sum of user rates based on the constraints, the channel state information feedback, the user weights, and the buffer sizes. The iteratively determining step determines the weighted sum of user rates based on an initial weighted sum of user rates determined for the user equipment devices without the constraints.

    摘要翻译： 提供了一种方法和发送设备，用于通过一个或多个包括一组集群的异构无线网络的发送设备进行协调的多点传输调度。 每个群集具有用于服务一组用户设备设备的一组传输点。 该方法包括确定施加在任何用户设备设备上的约束。 该方法还包括从用户设备设备接收信道状态信息反馈。 该方法还包括获得用户权重和缓冲区大小。 该方法还包括基于约束，信道状态信息反馈，用户权重和缓冲器大小迭代地确定用户速率的加权和。 迭代确定步骤基于为用户设备设备确定的用户速率的初始加权和而不受限制地确定用户速率的加权和。

    SYSTEM AND METHOD FOR RESOURCE MANAGEMENT IN HETEROGENEOUS WIRELESS NETWORKS
    8.
    发明申请
    SYSTEM AND METHOD FOR RESOURCE MANAGEMENT IN HETEROGENEOUS WIRELESS NETWORKS 有权
    异构无线网络资源管理系统与方法

    公开(公告)号：US20160037387A1

    公开(公告)日：2016-02-04

    申请号：US14812580

    申请日：2015-07-29

    申请人： NEC Laboratories America, Inc.

    发明人： Narayan Prasad ,  Vaibhav Singh ,  Sampath Rangarajan

    IPC分类号： H04W28/26 ,  H04W24/02

    CPC分类号： H04W24/02 ,  H04L47/41 ,  H04W28/02 ,  H04W72/0446

    摘要： A system and method for resource management in a heterogeneous wireless network wherein the resources of the mobile communications system are managed on a coarse time-scale and a fine time-scale. The coarse time-scale management comprises a first stage of determining the user association for each of the plurality of TPs followed by a second stage of determining activation fractions for all TPs. The determining of the user association is performed by utilizing a GLS procedure having a Greedy Stage and a Local Search Stage. In the Greedy Stage, new user, TP pairs are analyzed and the pair with the greatest improvement in system utility is selected. In the Local Search Stage, potential swaps are analyzed and a pair offering the greatest improvement that exceeds a threshold is selected. The determining of activation fractions for all TPs is performed by utilizing an auxiliary function method.

    摘要翻译： 一种用于异构无线网络中的资源管理的系统和方法，其中移动通信系统的资源以粗略的时间尺度和精细的时间尺度进行管理。 粗略的时间尺度管理包括确定多个TP中的每个TP的用户关联的第一阶段，随后是确定所有TP的激活分数的第二阶段。 通过利用具有贪婪阶段和本地搜索阶段的GLS过程来执行用户关联的确定。 在贪婪阶段，对新用户TP对进行分析，选择系统效用最大的对。 在本地搜索阶段，分析潜在的交换，并选择一个提供超过阈值的最大改进的对。 通过利用辅助功能方法来确定所有TP的活化分数。

    Uplink power control
    9.
    发明授权
    Uplink power control 有权
    上行电源控制

    公开(公告)号：US09042937B2

    公开(公告)日：2015-05-26

    申请号：US14093565

    申请日：2013-12-02

    申请人： NEC Laboratories America, Inc.

    发明人： Honghai Zhang ,  Narayan Prasad ,  Sampath Rangarajan

    IPC分类号： H04B7/00 ,  H04W52/14 ,  H04W52/08 ,  H04W52/10 ,  H04W52/24

    CPC分类号： H04W52/146 ,  H04W52/08 ,  H04W52/10 ,  H04W52/242 ,  H04W52/243

    摘要： A method for uplink power control implemented in a wireless communications system including one or more user equipment, a serving base station, and at least one neighboring base station is disclosed. The method comprises measuring, at each user equipment, pathloss, sending, from each user equipment to the serving base station, the pathloss, and determining, at the serving base station, uplink transmit power based on the pathloss. Other methods, systems, and apparatuses also are disclosed.

    摘要翻译： 公开了一种在包括一个或多个用户设备，服务基站和至少一个相邻基站的无线通信系统中实现的上行链路功率控制的方法。 该方法包括在每个用户设备处测量路径损耗，从每个用户设备向服务基站发送路径损耗，以及基于路径损耗在服务基站确定上行链路发射功率。 还公开了其它方法，系统和装置。

    Precoding selection for retransmission in uplink MIMO hybrid ARQ
    10.
    发明授权
    Precoding selection for retransmission in uplink MIMO hybrid ARQ 有权
    上行MIMO混合ARQ中重传的预编码选择

    公开(公告)号：US09025692B2

    公开(公告)日：2015-05-05

    申请号：US14247643

    申请日：2014-04-08

    申请人： NEC Laboratories America, Inc.

    发明人： Guosen Yue ,  Narayan Prasad ,  Meilong Jiang ,  Sampath Rangarajan

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

    CPC分类号： H04B7/0456 ,  H04L1/0618 ,  H04L1/1896 ,  H04L25/03343 ,  H04L2025/03426

    摘要： 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.

    摘要翻译： 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。