公开(公告)号：US08705956B2

公开(公告)日：2014-04-22

申请号：US13086724

申请日：2011-04-14

Applicant: Mingzheng Cao ,  Dayou Qian

Inventor： Mingzheng Cao ,  Dayou Qian

IPC: H04B17/00 ,  H04K1/10 ,  H04B1/707 ,  H04L12/26

CPC classification number: H04L27/2659 ,  H04L27/266 ,  H04L27/2671 ,  H04L27/2675 ,  H04L27/2692

Abstract: A system and method are provided for carrier frequency offset (CFO) estimation for coherent optical orthogonal-frequency-division-multiplexing (CO-OFDM) broadband systems. The method includes obtaining an initial estimate of a normalized CFO with an estimation range equal to ±L/2 subcarrier subspacing using a single training symbol with L identical portions. The method further includes obtaining a maximum likelihood (ML) estimate of the CFO by performing a local grid search based on the initial estimate.

Abstract translation: 提供了一种用于相干光正交频分复用（CO-OFDM）宽带系统的载波频偏（CFO）估计的系统和方法。 该方法包括使用具有L个相同部分的单个训练符号获得具有等于±L / 2子载波子空间的估计范围的归一化CFO的初始估计。 该方法还包括通过基于初始估计执行局部网格搜索来获得CFO的最大似然（ML）估计。

公开(公告)号：US08705392B2

公开(公告)日：2014-04-22

申请号：US13080416

申请日：2011-04-05

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

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

IPC: H04L12/26 ,  H04W4/00 ,  H04B7/02

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

Abstract: Methods and systems for determining attributes of communication channels of MU-MIMO users in an (OFDMA) system are disclosed. One method includes 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. The method further includes determining one or more signal quality measures for the at least one sub-band based on 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 in accordance with at least one of single-user scheduling rules or multi-user scheduling rules. In addition, the method includes transmitting to the base station an indication of the one or more signal quality measures and at least one tag identifying each signal quality measure as being determined in accordance with the single-user scheduling rules or the multi-user scheduling rules.

Abstract translation: 公开了一种用于确定（OFDMA）系统中MU-MIMO用户的通信信道属性的方法和系统。 一种方法包括从基站接收对于连续子载波的至少一个子带，对由基站在...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。 所述方法还包括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估计或所述上限来确定所述至少一个子带的一个或多个信号质量度量 根据单用户调度规则或多用户调度规则中的至少一个。 此外，该方法包括向基站发送一个或多个信号质量测量的指示，以及标识每个信号质量测量的至少一个标签，根据单用户调度规则或多用户调度规则确定 。

公开(公告)号：US20140109112A1

公开(公告)日：2014-04-17

申请号：US13850531

申请日：2013-03-26

Applicant: NEC Laboratories America, Inc.

Inventor： Hui Zhang ,  Jungwhan Rhee ,  Guofei Jiang ,  Kenji Yoshihira

IPC: G06F9/54

CPC classification number: G06F9/542 ,  G06F11/3466 ,  G06F11/3636 ,  G06F2201/86 ,  G06F2201/865

Abstract: A method for request profiling in service systems with kernel events includes collecting kernel events traces from a target system, the kernel event traces being obtainable from individual service machines by instrumenting core kernel functions, analyzing kernel event traces for constructing end-to-end request profiling traces consisting of kernel events belonging to service processes, and categorizing request traces responsive to the analyzing with the constructing including grouping requests based on marking kernel events used in the analyzing.

Abstract translation: 在具有内核事件的服务系统中请求分析的方法包括从目标系统收集内核事件跟踪，内核事件跟踪可通过测试核心内核功能从各个服务机器获得，分析内核事件跟踪以构建端到端请求分析 由属于服务进程的内核事件组成的跟踪，以及响应于构建分析的分类请求分类，包括基于分析中使用的内核事件的分组请求。

公开(公告)号：US20140108867A1

公开(公告)日：2014-04-17

申请号：US13800060

申请日：2013-03-13

Applicant: NEC Laboratories America, Inc.

Inventor： Malay Ganai ,  Dongyoon Lee ,  Aarti Gupta

IPC: G06F11/14

CPC classification number: G06F11/1482 ,  G06F11/3612

Abstract: Disclosed is a dynamic taint analysis framework for multithreaded programs (DTAM) that identifies a subset of program inputs and shared memory accesses that are relevant for issues related to concurrency. Computer implemented methods according to the framework generally involve the computer implemented steps of: applying independently a dynamic taint analysis to each of the multiple threads comprising a multi-threaded computer program; aggregating each independent result from the analysis for each of the multiple threads by consolidating effect of taint analysis in one or more possible re-orderings of observed shared memory accesses among threads; and outputting an indicia of the aggregated result as a set of relevant program inputs or a set of relevant shared memory accesses.

Abstract translation: 公开了一种用于多线程程序（DTAM）的动态污点分析框架，该框架标识与并发相关的问题相关的程序输入和共享存储器访问的子集。 根据框架的计算机实现的方法通常涉及计算机实现的步骤：对包括多线程计算机程序的多个线程中的每一个独立地应用动态污点分析; 通过在线程中观察到的共享存储器访问的一个或多个可能重新排序中合并污染分析的影响来聚合每个多线程的分析的每个独立结果; 并将所述聚合结果的标记输出为一组相关的程序输入或一组相关的共享存储器访问。

公开(公告)号：US20140100705A1

公开(公告)日：2014-04-10

申请号：US14043894

申请日：2013-10-02

Applicant: Di Shi ,  Ratnesh Kumar Sharma ,  Yanzhu Ye

Inventor： Di Shi ,  Ratnesh Kumar Sharma ,  Yanzhu Ye

IPC: G06F1/30

CPC classification number: G06F1/305 ,  H02J3/381 ,  H02J3/383 ,  H02J3/46 ,  H02J2003/388 ,  Y02E10/563

Abstract: System and methods are disclosed to handle power imbalance in one or more distributed generation (DG) units: detecting islanding at time t1; selecting Phasor Measurement Unit (PMU) measurements during a pre-defined time window [t1-τ, t1]; checking the time window for an abrupt voltage change; if no sudden change of voltage is detected, determining an average value of sPMUt between t1-τ and t1 and using the average as a best estimate of a system power imbalance; if a sudden change of voltage is detected at time instant t2, determining the average value of sPMUt between t1-τ and t2 and using the average as a best estimate of the system power imbalance; and adjusting a power reference of the DG units based on the best estimated system power imbalance.

Abstract translation: 公开了系统和方法来处理一个或多个分布式发电（DG）单元中的功率不平衡：在时间t1检测孤岛; 在预定义的时间窗口[t1-τ，t1]期间选择相量测量单元（PMU）测量; 检查时间窗口突然的电压变化; 如果没有检测到电压的突然变化，则确定t1-τ和t1之间的sPMUt的平均值，并使用平均值作为系统功率不平衡的最佳估计值; 如果在时刻t2检测到电压的突然变化，则确定t1-τ和t2之间的sPMUt的平均值，并使用平均值作为系统功率不平衡的最佳估计值; 并且基于最佳估计的系统功率不平衡来调整DG单元的功率基准。

公开(公告)号：US08694644B2

公开(公告)日：2014-04-08

申请号：US13485924

申请日：2012-06-01

Applicant: Haifeng Chen ,  Guofei Jiang

Inventor： Haifeng Chen ,  Guofei Jiang

IPC: G06F15/16

CPC classification number: G06F9/4856

Abstract: Systems and methods are disclosed to schedule virtual machine (VM) migrations by analyzing VM migration behavior; building a simulation tool to predict time for multiple migrations under different links conditions and VM characteristics; determining a predetermined bandwidth sharing policy for each network link; applying a bin-packing technique to organize bandwidth resources from all network links, and allocating the links to different migration tasks.

Abstract translation: 公开了系统和方法，通过分析VM迁移行为来调度虚拟机（VM）迁移; 构建一个模拟工具，以预测不同链接条件和VM特性下的多个迁移的时间; 确定每个网络链路的预定带宽共享策略; 应用二进制包装技术来组织来自所有网络链路的带宽资源，并将链路分配给不同的迁移任务。

公开(公告)号：US08693890B2

公开(公告)日：2014-04-08

申请号：US13081693

申请日：2011-04-07

Applicant: Dayou Qian ,  Ting Wang

Inventor： Dayou Qian ,  Ting Wang

IPC: H04B10/12 ,  H04B10/04

CPC classification number: H04B10/2543

Abstract: Systems and methods are disclosed to process an optical signal with a pre-processing module to populate a non-linearity compensation look-up table based on a set of predetermined rules in a non-real-time off-line mode; and a transmitter applying said predetermined rules in real-time to multiple channel input data to generate a real-time symbol pattern, searching the look-up table with the real-time symbol pattern to determine a non-linearity compensation output, and modulating the optical signal with the compensation output.

Abstract translation: 公开了系统和方法来处理具有预处理模块的光信号，以基于非实时离线模式中的一组预定规则来填充非线性补偿查找表; 以及发射机将所述预定规则实时地应用于多个信道输入数据以产生实时符号模式，用实时符号模式搜索查找表以确定非线性补偿输出，并且调制 光信号具有补偿输出。

公开(公告)号：US20140095685A1

公开(公告)日：2014-04-03

申请号：US14044177

申请日：2013-10-02

Applicant: NEC Laboratories America, Inc.

Inventor： Neda Cvijetic ,  Ankitkumar Patel ,  Philip Nan Ji ,  Ting Wang ,  Maria Ioanna Angelou

IPC: H04L12/24

CPC classification number: H04L41/00 ,  H04L41/022 ,  H04L41/04 ,  H04L41/044 ,  H04L41/12 ,  H04L45/38 ,  H04L45/42

Abstract: A generic centralized, software-defined networking configuration for connecting network is defined as a generic multi-layer topology network entities interconnected either vertically or horizontally regardless of the employed network topology/graph). This centralized configuration enables establishment of a connection between any two networking entities by 1) bypassing intermediate protocol layers and 2) eliminating any handshaking between peer elements of the same layer. The centralized software-defined controller notifies in parallel all involved network entities along a connection path to take all necessary actions (i.e. reconfiguration) to establish the new connection. The centralized controller has authority to control only entities that are software-defined SD.

Abstract translation: 用于连接网络的通用集中式软件定义网络配置被定义为垂直或水平互连的通用多层拓扑网络实体，而不管采用的网络拓扑/图形如何）。 这种集中式配置可以通过以下方式建立任何两个组网实体之间的连接：1）绕过中间协议层，以及2）消除同一层的对等体元素之间的任何握手。 集中式软件定义的控制器并行地通过连接路径并行地通知所有涉及的网络实体，以采取所有必要的动作（即重新配置）来建立新的连接。 集中控制器具有仅控制软件定义SD的实体的权限。

公开(公告)号：US20140087783A1

公开(公告)日：2014-03-27

申请号：US14093565

申请日：2013-12-02

Applicant: NEC Laboratories America, Inc.

Inventor： Honghai Zhang ,  Narayan Prasad ,  Sampath Rangarajan

IPC: H04W52/14

CPC classification number: H04W52/146 ,  H04W52/08 ,  H04W52/10 ,  H04W52/242 ,  H04W52/243

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20140058571A1

公开(公告)日：2014-02-27

申请号：US13858033

申请日：2013-04-06

Applicant: NEC LABORATORIES AMERICA, INC.

Inventor： Ali Hooshmand ,  Ratnesh Sharma ,  Babak Asghari

IPC: G05B15/02

CPC classification number: G05B15/02 ,  H02J3/00 ,  H02J2003/003 ,  Y04S10/54

Abstract: Systems and methods are disclosed for multi-objective energy management of micro-grids. A two-layer control method is used. In the first layer which is the advisory layer, a Model Predictive Control (MPC) method is used as a long term scheduler. The result of this layer will be used as optimality constraints in the second layer. In the second layer, a real-time controller guarantees a second-by-second balance between supply and demand subject to the constraints provided by the advisory layer.

Abstract translation: 公开了用于微网格的多目标能量管理的系统和方法。 使用两层控制方法。 在作为建议层的第一层中，使用模型预测控制（MPC）作为长期调度器。 该层的结果将被用作第二层中的最优约束。 在第二层中，实时控制器保证在咨询层提供的约束条件下，供应和需求之间的二阶平衡。