公开(公告)号：US20140140428A1

公开(公告)日：2014-05-22

申请号：US14082695

申请日：2013-11-18

Applicant: NEC Laboratories America, Inc.

Inventor： Mohammad A. Khojastepour ,  Sampath Rangarajan

IPC: H04B7/04 ,  H04L25/49

CPC classification number: H04L25/03955 ,  H04B7/0417 ,  H04B7/0639 ,  H04L25/03898

Abstract: There is provided a method performed by a transmitter in a multi-user communication system. The method includes transmitting a first part of a codeword to a plurality of receivers over a communication channel in a transmission. The method further includes receiving feedback on the transmission of the first part of the codeword. The method also includes providing an artificial channel having channel parameters adjustable responsive to the received feedback. The method additionally includes virtually feeding the artificial channel with the first part of the codeword to generate artificial channel output data. The method further includes encoding a second part of the codeword for transmission to the plurality of receivers over the communication channel responsive to the artificial channel output data. The method also includes transmitting the encoded signals to the plurality of receivers over the communication channel.

Abstract translation: 提供了一种由多用户通信系统中的发射机执行的方法。 该方法包括通过传输中的通信信道将码字的第一部分发送到多个接收机。 该方法还包括接收关于码字的第一部分的传输的反馈。 该方法还包括提供具有响应于所接收的反馈可调节的信道参数的人造通道。 该方法还包括虚拟地将人造通道与码字的第一部分进行馈送以产生人造通道输出数据。 该方法还包括响应于人造渠道输出数据，通过通信通道对码字的第二部分进行编码以传输到多个接收机。 该方法还包括通过通信信道将编码信号发送到多个接收机。

公开(公告)号：US20140129588A1

公开(公告)日：2014-05-08

申请号：US14070603

申请日：2013-11-04

Applicant: NEC Laboratories America, Inc.

Inventor： Yun Chi ,  Vahit Hakan Hacigumus ,  Wang-Pin Hsiung

IPC: G06F17/30

CPC classification number: G06F17/30979

Abstract: Systems and methods for prioritizing queries in a cloud based database by determining a priority score in real time under an imprecise query execution time; and incrementally maintaining query priority scores.

Abstract translation: 通过在不精确的查询执行时间内实时确定优先级得分，在基于云的数据库中优先查询的系统和方法; 并逐步维护查询优先级分数。

公开(公告)号：US08718490B2

公开(公告)日：2014-05-06

申请号：US12183332

申请日：2008-07-31

Applicant: Lei Xu ,  Junqiang Hu ,  Ting Wang ,  Dayou Qian ,  Yutaka Yano

Inventor： Lei Xu ,  Junqiang Hu ,  Ting Wang ,  Dayou Qian ,  Yutaka Yano

IPC: H04B10/61

CPC classification number: H04L27/2647 ,  H04B10/63

Abstract: A method includes producing interference between a received optical OFDM signal and an optical carrier extracted from the received optical OFDM signal to provide optical coherent detection of the received optical OFDM signal. Preferably, producing the interference includes optically splitting the received optical OFDM signal into a first part that is filtered to extract the carrier from the received optical OFDM signal and a second part similar to the received optical OFDM signal.

Abstract translation: 一种方法包括：从所接收的光学OFDM信号中提取接收到的光OFDM信号与光载波之间产生干扰，以提供所接收的光OFDM信号的光相干检测。 优选地，产生干扰包括将所接收的光学OFDM信号光学分割成被滤波的第一部分，以从接收的光学OFDM信号中提取载波，以及类似于接收的光学OFDM信号的第二部分。

公开(公告)号：US08707278B2

公开(公告)日：2014-04-22

申请号：US13251463

申请日：2011-10-03

Applicant: Gogul Balakrishnan ,  Naoto Maeda ,  Franjo Ivancic ,  Nishant Sinha ,  Aarti Gupta ,  Jing Yang

Inventor： Gogul Balakrishnan ,  Naoto Maeda ,  Franjo Ivancic ,  Nishant Sinha ,  Aarti Gupta ,  Jing Yang

IPC: G06F9/45

CPC classification number: G06F8/4434 ,  G06F8/24 ,  G06F8/443 ,  G06F8/51 ,  G06F8/75

Abstract: A model is provided for transforming a program with a priori given class hierarchy that is induced by inheritance. An inheritance remover is configured to remove inheritance from a given program to produce an analysis-friendly program which does not include virtual-function pointer tables and runtime libraries associated with inheritance-related operations. The analysis-friendly program preserves the semantics of the given program with respect to a given class hierarchy. A clarifier is configured to identify implicit expressions and function calls and transform the given program into at least one intermediate program having explicit expressions and function calls.

Abstract translation: 提供了一个模型，用于使用由继承引发的先验给定的类层次结构来转换程序。 继承去除器配置为从给定的程序中删除继承，以生成一个不包含与继承相关的操作相关联的虚拟函数指针表和运行时库的分析友好的程序。 分析友好的程序保留给定程序相对于给定类层次结构的语义。 澄清器被配置为识别隐式表达式和函数调用，并将给定程序转换成具有显式表达式和函数调用的至少一个中间程序。

公开(公告)号：US08705963B2

公开(公告)日：2014-04-22

申请号：US13236460

申请日：2011-09-19

Applicant: Ankitkumar Patel ,  Philip Nan Ji

Inventor： Ankitkumar Patel ,  Philip Nan Ji

IPC: H04J14/00

CPC classification number: H04J14/0224 ,  H04J14/0257 ,  H04J14/026 ,  H04J14/0267

Abstract: A method implemented in an optical flexible wavelength division multiplexing FWDM network includes finding a first channel out of available channels with sufficient spectrum on a given route out of available channels in an optical FWDM network; finding a second channel at a lower wavelength out of the available channels for minimizing total spectrum on the given route; selecting a channel out of the available channels on K-distinct shortest routes; and finding line rates of channels using a predetermined channel selection.

Abstract translation: 在光学灵活波分复用FWDM网络中实现的方法包括：在光纤FWDM网络中的可用信道之外，在给定路由上从具有足够频谱的可用信道中发现第一信道; 从可用信道中找到较低波长的第二信道，以使给定路由上的总频谱最小化; 在K个不同的最短路线上从可用频道中选择频道; 并且使用预定的频道选择来找到频道的频率。

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。