公开(公告)号：US08959381B2

公开(公告)日：2015-02-17

申请号：US13603977

申请日：2012-09-05

Applicant: James Aweya ,  Nayef AlSindi

Inventor： James Aweya ,  Nayef AlSindi

IPC: G06F1/04 ,  G06F1/00 ,  G06F15/16 ,  G06F1/14

CPC classification number: G06F1/04 ,  G06F1/14 ,  H04J3/0667 ,  H04L43/087

Abstract: This invention relates to methods and devices for clock offset and skew estimation. The invention has particular application in the alignment of slave clocks to a master clock. In embodiments of the invention, the slave clock employs an independent free running clock and a recursive estimation technique to estimate the clock offset and clock skew between the slave and master clocks. The slave can then use the offset and skew to correct the free running clock to reflect an accurate image of the master clock.

Abstract translation: 本发明涉及用于时钟偏移和偏斜估计的方法和装置。 本发明特别适用于从时钟到主时钟的对准。 在本发明的实施例中，从时钟采用独立的自由运行时钟和递归估计技术来估计从时钟和主时钟之间的时钟偏移和时钟偏移。 然后，从机可以使用偏移和偏移来校正自由运行的时钟，以反映主时钟的准确图像。

公开(公告)号：US08737279B1

公开(公告)日：2014-05-27

申请号：US13431423

申请日：2012-03-27

Applicant: James Aweya ,  Luis Orozco-Barbosa

Inventor： James Aweya ,  Luis Orozco-Barbosa

IPC: H04B7/00

CPC classification number: G01S5/14 ,  G01S13/46 ,  G01S13/878 ,  G01S2013/466 ,  H04J3/0667

Abstract: A method and system for position location of clients in wireless local area networks. (WLANs). The position location technique utilizes time-of-flight (TOF) measurements of signals transmitted from a client to a number of wireless access points (APs) or vice versa to determine distances. Round-trip time (RTT) measurement protocols are used to estimate TOF and distances between the client at an unknown position and the WLAN APs. The method and system improves positioning accuracy by identifying and mitigating non-line-of sight (NLOS) errors such as multipaths. Trilateration algorithms are utilized in combination with median filtering of measurements to accurately estimate the position of the client.

Abstract translation: 一种在无线局域网中客户端定位的方法和系统。 （WLAN）。 位置定位技术利用从客户端发送到多个无线接入点（AP）的信号的飞行时间（TOF）测量，反之亦然，以确定距离。 往返时间（RTT）测量协议用于估计TOF和未知位置的客户端与WLAN AP之间的距离。 该方法和系统通过识别和减轻诸如多路径之类的非视距（NLOS）错误来提高定位精度。 三边测量算法与测量的中值滤波结合使用，以准确估计客户端的位置。

公开(公告)号：US20140062793A1

公开(公告)日：2014-03-06

申请号：US13604063

申请日：2012-09-05

Applicant: Nayef AlSindi ,  James Aweya

Inventor： Nayef AlSindi ,  James Aweya

IPC: G01S3/02 ,  H04B17/00

CPC classification number: G01S5/0215 ,  H04B17/24 ,  H04B17/27 ,  H04B17/364 ,  H04B17/391

Abstract: This invention relates to methods and devices for channel identification. The invention is particularly concerned with techniques for non-line of sight channel identification. In embodiments of the invention the methods and devices are used for channel identification in wireless geolocation systems. Embodiments of the invention make use of an entropy estimation of the channel to distinguish channel conditions and in particular to identify line-of-sight and non-line-of-sight channels and which can be used to solve the NLOS problem of determining relative distances between transmitter and receiver. In particular embodiments an entropy estimation of the channel impulse response (CIR) is used to construct a robust entropy-based channel identification technique. As a result, more accurate localization in indoor and other multipath environments may be possible.

Abstract translation: 本发明涉及用于信道识别的方法和装置。 本发明特别涉及非视线通道识别技术。 在本发明的实施例中，方法和装置用于无线地理定位系统中的信道识别。 本发明的实施例利用信道的熵估计来区分信道条件，特别是识别视线和非视距信道，并且其可以用于解决确定相对距离的NLOS问题 在发射机和接收机之间。 在特定实施例中，信道脉冲响应（CIR）的熵估计用于构建基于鲁棒熵的信道识别技术。 因此，在室内和其他多路径环境中更准确的定位是可能的。

公开(公告)号：US08165150B2

公开(公告)日：2012-04-24

申请号：US12336671

申请日：2008-12-17

Applicant: James Aweya ,  Luis Orozco Barbosa

Inventor： James Aweya ,  Luis Orozco Barbosa

IPC: H04L12/28

CPC classification number: G01S5/14 ,  G01S13/46 ,  G01S13/878 ,  G01S2013/466 ,  H04J3/0667

Abstract: A method and system for position location of clients in wireless local area networks. (WLANs). The position location technique utilizes time-of-flight (TOF) measurements of signals transmitted from a client to a number of wireless access points (APs) or vice versa to determine distances. Round-trip time (RTT) measurement protocols are used to estimate TOF and distances between the client at an unknown position and the WLAN APs. The method and system improves positioning accuracy by identifying and mitigating non-line-of sight (NLOS) errors such as multipaths. Trilateration algorithms are utilized in combination with median filtering of measurements to accurately estimate the position of the client.

Abstract translation: 一种在无线局域网中客户端定位的方法和系统。 （WLAN）。 位置定位技术利用从客户端发送到多个无线接入点（AP）的信号的飞行时间（TOF）测量，反之亦然，以确定距离。 往返时间（RTT）测量协议用于估计TOF和未知位置的客户端与WLAN AP之间的距离。 该方法和系统通过识别和减轻诸如多路径之类的非视距（NLOS）错误来提高定位精度。 三边测量算法与测量的中值滤波结合使用，以准确估计客户端的位置。

公开(公告)号：US07787370B1

公开(公告)日：2010-08-31

申请号：US09946736

申请日：2001-09-06

Applicant: James Aweya ,  Michel Ouellette ,  Delfin Y. Montuno ,  Kent Felske

Inventor： James Aweya ,  Michel Ouellette ,  Delfin Y. Montuno ,  Kent Felske

IPC: G01R31/08

CPC classification number: H04L47/10 ,  H04L45/245 ,  H04L47/125 ,  Y02D50/30

Abstract: A technique for adaptively load balancing connections in multi-link trunks is disclosed. The present invention provides an adaptive load balancing algorithm that utilizes relative link quality metrics to adjust traffic distribution between links. Link quality metrics may include short-term averages of an observed packet drop rate for each member link in a bundle. The present invention may dynamically adjust the number of flows on each link in proportion to available bandwidth. In addition, link quality metrics may be equalized, such that no link is more lossy than the others.

Abstract translation: 公开了一种用于在多链路干线中自适应地负载平衡连接的技术。 本发明提供一种自适应负载平衡算法，其利用相对链路质量度量来调整链路之间的业务分布。 链路质量度量可以包括捆绑中每个成员链路观察到的分组丢弃率的短期平均值。 本发明可以与可用带宽成比例地动态地调整每个链路上的流量。 此外，链路质量度量可能会相等，使得没有链路比其他链路更有损耗。

公开(公告)号：US07684333B1

公开(公告)日：2010-03-23

申请号：US11191485

申请日：2005-07-28

Applicant: Abel Clement Dasylva ,  Zhonghui Yao ,  Delfin Montuno ,  Michel Ouellette ,  James Aweya ,  Wenfeng Chen ,  Kent Felske

Inventor： Abel Clement Dasylva ,  Zhonghui Yao ,  Delfin Montuno ,  Michel Ouellette ,  James Aweya ,  Wenfeng Chen ,  Kent Felske

IPC: H04L5/12 ,  G01R3/08 ,  G06F11/00 ,  G08C15/00

CPC classification number: H04L5/0037 ,  H04L5/0064

Abstract: A method and system for allocating bandwidth of a wireless channel to different types of traffic includes partitioning the bandwidth of the wireless channel into a plurality of contention periods. Traffic flows are associated with access categories, and one or more of the access categories are assigned to each contention period. During at least one of the contention periods, traffic flows associated with a proper subset of the access categories contend for access to the wireless channel.

Abstract translation: 将无线信道的带宽分配给不同类型的业务的方法和系统包括将无线信道的带宽划分成多个争用周期。 业务流与访问类别相关联，并且一个或多个访问类别被分配给每个争用期。 在至少一个竞争时段期间，与访问类别的适当子集相关联的业务流竞争访问无线信道。

公开(公告)号：US07409020B1

公开(公告)日：2008-08-05

申请号：US10732532

申请日：2003-12-11

Applicant: Aneta Wyrzykowska ,  Kah Ming Soh ,  James Aweya ,  Delfin Montuno ,  Michel Ouellette

Inventor： Aneta Wyrzykowska ,  Kah Ming Soh ,  James Aweya ,  Delfin Montuno ,  Michel Ouellette

IPC: H04B1/10

CPC classification number: H03L7/093 ,  H04J3/0632

Abstract: A technique for filter-enhanced clock synchronization is disclosed. In one particular exemplary embodiment, the technique may be realized by/as a method for filter-enhanced clock synchronization. The method comprises subjecting a clock error signal to a first exponentially weighted moving average (EWMA) filter to generate a first output signal, where the first EWMA filter comprises a first gain element. And the method further comprises subjecting the first output signal to a second EWMA filter to generate a second output signal, where the second EWMA filter comprises a second gain element and the second EWMA filter is coupled with a feedback loop having a delay element and a summing junction.

Abstract translation: 公开了一种用于滤波器增强时钟同步的技术。 在一个特定的示例性实施例中，该技术可以通过/作为滤波器增强时钟同步的方法来实现。 该方法包括使时钟误差信号经受第一指数加权移动平均（EWMA）滤波器以产生第一输出信号，其中第一EWMA滤波器包括第一增益元件。 并且该方法还包括使第一输出信号经受第二EWMA滤波器以产生第二输出信号，其中第二EWMA滤波器包括第二增益元件，而第二EWMA滤波器与具有延迟元件的反馈回路耦合， 交界处

公开(公告)号：US07324519B2

公开(公告)日：2008-01-29

申请号：US11034839

申请日：2005-01-14

Applicant: Delfin Y. Montuno ,  James Aweya

Inventor： Delfin Y. Montuno ,  James Aweya

IPC: H04L12/56

CPC classification number: H04L45/00 ,  H04L45/54 ,  Y10S707/99933

Abstract: A method and apparatus for locating in a list of pre-defined codes, a longest code matching a given code. The method and apparatus involve producing a search mask encoding at least one portion of said given code and comparing the search mask to a search key having a Prefix Node Bit Array (PNBA) in which a bit is set active in at least one of a plurality of bit positions corresponding to possible bit combinations of bits in a bit string having a length equal to or less than the longest predefined code in the plurality of pre-defined codes and arranged by the lengths of possible bit combinations and by numeric values of the bit combinations, to identify a common active bit position in the search key and the search mask corresponding to one of the pre-defined codes having a length greater than all others of said pre-defined codes which correspond to common active bit positions.

Abstract translation: 用于定位在预定义代码列表中的方法和装置，其是与给定代码匹配的最长代码。 所述方法和装置包括产生编码所述给定代码的至少一部分的搜索掩码，并且将搜索掩码与具有前缀节点位阵列（PNBA）的搜索关键字进行比较，其中将位设置为多个 对应于具有等于或小于多个预定义代码中的最长预定义代码的长度的比特串中的比特的可能比特组合的比特位置，并且由可能的比特组合的长度和比特的数值 组合，以识别搜索关键字中的公共活动比特位置和对应于具有大于对应于公共活动比特位置的所述预定义码的所有其他长度的预定义码之一的搜索掩码。

公开(公告)号：US07298699B1

公开(公告)日：2007-11-20

申请号：US10426289

申请日：2003-04-30

Applicant: Delfin Montuno ,  James Aweya ,  Michel Ouellette ,  Kent Felske

Inventor： Delfin Montuno ,  James Aweya ,  Michel Ouellette ,  Kent Felske

IPC: H04L12/26

CPC classification number: H04L47/31 ,  H04L41/142 ,  H04L43/00 ,  H04L43/022 ,  H04L43/0894 ,  H04L43/16 ,  H04L47/10 ,  H04L47/18

Abstract: Disclosed is an Active Queue Management method and apparatus which uses traffic rate information for congestion control. Using a nonlinear fluid-flow model of Traffic Control Protocol, an integral controller in a closed loop configuration with gain settings characterized for stable operation allows a matching of the aggregate rate of the active TCP connections to the available capacity. Further disclosed is a method for calculation of the regime of gains for which stable operation of a given network obtains. This approach allows for capacity matching while maintaining minimal queue size and high link utilization.

Abstract translation: 公开了一种使用业务速率信息进行拥塞控制的活动队列管理方法和装置。 使用流量控制协议的非线性流体流模型，具有以稳定操作为特征的增益设置的闭环配置中的集成控制器允许活动TCP连接的总速率与可用容量的匹配。 进一步公开了一种用于计算给定网络的稳定运行获得的增益方案的方法。 这种方法允许容量匹配，同时保持最小的队列大小和高的链路利用率。

公开(公告)号：US07221656B1

公开(公告)日：2007-05-22

申请号：US10172981

申请日：2002-06-18

Applicant: James Aweya ,  Michel Ouellette ,  Delfin Y. Montuno

Inventor： James Aweya ,  Michel Ouellette ,  Delfin Y. Montuno

IPC: H04J1/16 ,  G08C15/00

CPC classification number: H04L47/10 ,  H04L47/2441 ,  H04L47/30 ,  H04L47/326

Abstract: A technique for implementing an admission control scheme for data flows is disclosed. In one embodiment, the technique is realized by determining a current error value in response to a queue size in a packet buffer; generating a packet drop probability based at least in part on the current error value; receiving a data packet having a data type; and determining whether to reject or accept the received data packet at a queue based at least in part on the packet drop probability and a predetermined flow rejection threshold. In addition, the technique may involve determining whether a randomly generated number is less than or equal to the packet drop probability and determining whether a count variable is greater than or equal to an inter-drop interval.

Abstract translation: 公开了一种用于实现数据流的准入控制方案的技术。 在一个实施例中，通过响应于分组缓冲器中的队列大小来确定当前错误值来实现该技术; 至少部分地基于当前误差值产生分组丢弃概率; 接收具有数据类型的数据分组; 以及至少部分地基于分组丢弃概率和预定流拒绝阈值来确定是否拒绝或接受队列处的接收数据分组。 此外，该技术可以涉及确定随机生成的数量是否小于或等于分组丢弃概率，并且确定计数变量是否大于或等于中间间隔。