公开(公告)号：US07460649B2

公开(公告)日：2008-12-02

申请号：US11035422

申请日：2005-01-14

申请人： Feng Ouyang ,  Patrick Duvaut ,  Ming Gu

发明人： Feng Ouyang ,  Patrick Duvaut ,  Ming Gu

IPC分类号： H04M1/24 ,  H04M3/08 ,  H04M3/22

CPC分类号： H04M3/305 ,  H04B3/46 ,  H04M1/24 ,  H04M3/2209

摘要： A method and apparatus for single end loop testing for DSL provisioning and maintenance provides testing of the DSL loop using digital techniques including frequency compensation, matched filtering and median filtering, to remove strong background and enhance desired signal for peak detection. The SELT system allows DSL providers to extract loop information from reflective measurements at the central office (CO) so as to determine loop capability of supporting different DSL services. The method and apparatus acquires the desired signal (the far-end echo) which is submerged in the correlated background noise (the near-end echo) by providing a process for detecting loop length and termination types with high accuracy for loops up to 12 kft for 24 AWG and up to 9 kft for 26 AWG by exploiting several digital signal processing techniques including frequency.

摘要翻译： 用于DSL供应和维护的单端环路测试的方法和装置使用包括频率补偿，匹配滤波和中值滤波的数字技术来测试DSL环路，以去除强背景并增强用于峰值检测的期望信号。 SELT系统允许DSL提供商从中心局（CO）的反射测量中提取循环信息，以确定支持不同DSL服务的循环能力。 该方法和装置通过提供用于检测环路长度和端接类型的过程，以高达12kft的环路获得淹没在相关背景噪声（近端回波）中的期望信号（远端回波） 通过利用几种数字信号处理技术（包括频率），可实现24 AWG和高达9 kft的26 AWG。

公开(公告)号：US20050163287A1

公开(公告)日：2005-07-28

申请号：US11035422

申请日：2005-01-14

申请人： Feng Ouyang ,  Patrick Duvaut ,  Ming Gu

发明人： Feng Ouyang ,  Patrick Duvaut ,  Ming Gu

IPC分类号： H04M1/24 ,  H04M3/30 ,  H04M3/08

CPC分类号： H04M3/305 ,  H04B3/46 ,  H04M1/24 ,  H04M3/2209

摘要： A method and apparatus for single end loop testing for DSL provisioning and maintenance provides testing of the DSL loop using digital techniques including frequency compensation, matched filtering and median filtering, to remove strong background and enhance desired signal for peak detection. The SELT system allows DSL providers to extract loop information from reflective measurements at the central office (CO) so as to determine loop capability of supporting different DSL services. The method and apparatus acquires the desired signal (the far-end echo) which is submerged in the correlated background noise (the near-end echo) by providing a process for detecting loop length and termination types with high accuracy for loops up to 12 kft for 24 AWG and up to 9 kft for 26 AWG by exploiting several digital signal processing techniques including frequency.

摘要翻译： 用于DSL供应和维护的单端环路测试的方法和装置使用包括频率补偿，匹配滤波和中值滤波的数字技术来测试DSL环路，以去除强背景并增强用于峰值检测的期望信号。 SELT系统允许DSL提供商从中心局（CO）的反射测量中提取循环信息，以确定支持不同DSL服务的循环能力。 该方法和装置通过提供用于检测环路长度和端接类型的过程，以高达12kft的环路获得淹没在相关背景噪声（近端回波）中的期望信号（远端回波） 通过利用几种数字信号处理技术（包括频率），可实现24 AWG和高达9 kft的26 AWG。

公开(公告)号：US07974583B2

公开(公告)日：2011-07-05

申请号：US11031020

申请日：2005-01-10

申请人： Patrick Duvaut ,  Feng Ouyang

发明人： Patrick Duvaut ,  Feng Ouyang

IPC分类号： H04B7/00

CPC分类号： H04L5/0044 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/14 ,  H04W52/34

摘要： A technique for real-time formation of optimal power spectral density masks is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for real-time formation of optimal power spectral density masks. The method may comprise sensing line conditions in a communication medium, wherein the communication medium is capable of carrying signals in a plurality of tones. The method may also comprise determining, in real-time, one or more power spectral density masks that substantially optimize transmissions of the signals in the plurality of tones. The method may further comprise transmitting the signals in the plurality of tones based on the one or more power spectral masks.

摘要翻译： 公开了一种用于实时形成最佳功率谱密度掩模的技术。 在一个特定的示例性实施例中，该技术可以被实现为用于实时形成最佳功率谱密度掩模的方法。 该方法可以包括感测通信介质中的线路条件，其中通信介质能够承载多个音调的信号。 该方法还可以包括实时地确定基本上优化多个音调中的信号的传输的一个或多个功率谱密度掩模。 该方法还可以包括基于一个或多个功率谱掩模来发送多个音调中的信号。

公开(公告)号：US07406126B2

公开(公告)日：2008-07-29

申请号：US10714655

申请日：2003-11-18

申请人： Patrick Duvaut ,  Ehud Langberg ,  Lujing Cai ,  Laurent Pierrugues ,  William Scholtz ,  Oliver Moreno ,  Feng Ouyang ,  Massimo Sorbara

发明人： Patrick Duvaut ,  Ehud Langberg ,  Lujing Cai ,  Laurent Pierrugues ,  William Scholtz ,  Oliver Moreno ,  Feng Ouyang ,  Massimo Sorbara

IPC分类号： H04K1/10 ,  H04L27/28

CPC分类号： H04L5/143 ,  H04L5/1438 ,  H04L27/2626 ,  H04Q2213/13039

摘要： Various embodiments for addressing the performance objectives of LDSL and examples of smart systems for LDSL are disclosed. An evaluation of the spectral compatibility of two LDSL modes based on two different downstream masks, identified herein as LDSL Wide and Narrow, is disclosed. Spectral compatibility is evaluated in accordance with existing rules. Other embodiments may further comprise determining features of upstream transmission.

摘要翻译： 公开了用于解决LDSL的性能目标的各种实施例和用于LDSL的智能系统的示例。 公开了基于两种不同下游掩模的两种LDSL模式的频谱兼容性的评估，这两种不同的下行掩码在本文中被标识为LDSL Wide和Narrow。 光谱兼容性根据现有规则进行评估。 其他实施例还可以包括确定上行传输的特征。

公开(公告)号：US20080089485A1

公开(公告)日：2008-04-17

申请号：US11865817

申请日：2007-10-02

申请人： Patrick Duvaut ,  Amitkumar Mahadevan ,  Feng Ouyang

发明人： Patrick Duvaut ,  Amitkumar Mahadevan ,  Feng Ouyang

IPC分类号： H04M1/24

CPC分类号： H04M1/24

摘要： Systems and methods for performing single-end line testing (SELT) are described. At least one embodiment includes a method for SELT to determine loop characteristics for a loop. The method for performing SELT comprises generating a test signal through a loop to be tested and receiving an echo response. The method further comprises subtracting predetermined near end echo response from the received echo to derive a far end echo response, performing time-dependent scaling on the far end echo response to compensate for loop attenuation, comparing the time-scaled far end echo response to a set of predefined templates, and providing an estimate of loop characteristics by identifying a matching template within the set of predefined templates, wherein the matching template contains information relating to loop characteristics comprising loop length and loop termination.

摘要翻译： 描述了执行单端线路测试（SELT）的系统和方法。 至少一个实施例包括用于SELT来确定循环的循环特性的方法。 用于执行SELT的方法包括通过要测试的环路产生测试信号并接收回波响应。 该方法还包括从接收到的回波中减去预定的近端回波响应以导出远端回波响应，对远端回波响应执行时间依赖的缩放以补偿环路衰减，将时间标度的远端回波响应与 一组预定义的模板，以及通过识别该组预定义模板内的匹配模板来提供循环特征的估计，其中该匹配模板包含与包括环路长度和环路终止的环路特性有关的信息。

公开(公告)号：US07580379B2

公开(公告)日：2009-08-25

申请号：US10824611

申请日：2004-04-15

申请人： Feng Ouyang ,  Patrick Duvaut ,  Chengshu Wang

发明人： Feng Ouyang ,  Patrick Duvaut ,  Chengshu Wang

IPC分类号： H04J1/00

CPC分类号： H04L27/2608

摘要： A technique for dynamic bin allocation is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for dynamic bin allocation. The method may comprise obtaining link performance data based on a plurality of test transmissions between two network elements, wherein the plurality of test transmissions utilize at least one transmission mode in each of a plurality of frequency ranges. The method may also comprise determining a desired transmission scheme, wherein each of the plurality of frequency ranges is designated for at least one of the at least one transmission mode based at least in part on the link performance data. The desired transmission scheme may be determined by identifying a desired transmission mode for each of the plurality of frequency ranges, or the desired transmission scheme may be selected from a plurality of predetermined transmission schemes.

摘要翻译： 公开了一种用于动态分配箱的技术。 在一个特定的示例性实施例中，该技术可以被实现为用于动态仓分配的方法。 该方法可以包括基于两个网络元件之间的多个测试传输来获得链路性能数据，其中多个测试传输在多个频率范围的每一个中使用至少一个传输模式。 该方法还可以包括确定期望的传输方案，其中至少部分地基于链路性能数据来指定多个频率范围中的每一个针对至少一个传输模式中的至少一个。 可以通过识别多个频率范围中的每一个的期望的传输模式来确定期望的传输方案，或者可以从多个预定传输方案中选择所需的传输方案。

公开(公告)号：US20050232172A1

公开(公告)日：2005-10-20

申请号：US10824611

申请日：2004-04-15

申请人： Feng Ouyang ,  Patrick Duvaut ,  Chengshu Wang

发明人： Feng Ouyang ,  Patrick Duvaut ,  Chengshu Wang

IPC分类号： H04L5/16 ,  H04L27/26

CPC分类号： H04L27/2608

摘要： A technique for dynamic bin allocation is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for dynamic bin allocation. The method may comprise obtaining link performance data based on a plurality of test transmissions between two network elements, wherein the plurality of test transmissions utilize at least one transmission mode in each of a plurality of frequency ranges. The method may also comprise determining a desired transmission scheme, wherein each of the plurality of frequency ranges is designated for at least one of the at least one transmission mode based at least in part on the link performance data. The desired transmission scheme may be determined by identifying a desired transmission mode for each of the plurality of frequency ranges, or the desired transmission scheme may be selected from a plurality of predetermined transmission schemes.

摘要翻译： 公开了一种用于动态分配箱的技术。 在一个特定的示例性实施例中，该技术可以被实现为用于动态仓分配的方法。 该方法可以包括基于两个网络元件之间的多个测试传输来获得链路性能数据，其中多个测试传输在多个频率范围的每一个中使用至少一个传输模式。 该方法还可以包括确定期望的传输方案，其中至少部分地基于链路性能数据来指定多个频率范围中的每一个针对至少一个传输模式中的至少一个。 可以通过识别多个频率范围中的每一个的期望的传输模式来确定期望的传输方案，或者可以从多个预定传输方案中选择所需的传输方案。

公开(公告)号：US20050152442A1

公开(公告)日：2005-07-14

申请号：US11031020

申请日：2005-01-10

申请人： Patrick Duvaut ,  Feng Ouyang

发明人： Patrick Duvaut ,  Feng Ouyang

IPC分类号： H04B1/38 ,  H04L5/16 ,  H04L27/26

CPC分类号： H04L5/0044 ,  H04L5/0007 ,  H04L5/006 ,  H04L5/14 ,  H04W52/34

摘要： A technique for real-time formation of optimal power spectral density masks is disclosed. In one particular exemplary embodiment, the technique may be realized as a method for real- time formation of optimal power spectral density masks. The method may comprise sensing line conditions in a communication medium, wherein the communication medium is capable of carrying signals in a plurality of tones. The method may also comprise determining, in real-time, one or more power spectral density masks that substantially optimize transmissions of the signals in the plurality of tones. The method may further comprise transmitting the signals in the plurality of tones based on the one or more power spectral masks.

摘要翻译： 公开了一种用于实时形成最佳功率谱密度掩模的技术。 在一个特定的示例性实施例中，该技术可以被实现为用于实时形成最佳功率谱密度掩模的方法。 该方法可以包括感测通信介质中的线路条件，其中通信介质能够承载多个音调的信号。 该方法还可以包括实时地确定基本上优化多个音调中的信号的传输的一个或多个功率谱密度掩模。 该方法还可以包括基于一个或多个功率谱掩模来发送多个音调中的信号。

公开(公告)号：US08300771B2

公开(公告)日：2012-10-30

申请号：US12325541

申请日：2008-12-01

申请人： Vaibhav Dinesh ,  Kunal Raheja ,  Amitkumar Mahadevan ,  Patrick Duvaut

发明人： Vaibhav Dinesh ,  Kunal Raheja ,  Amitkumar Mahadevan ,  Patrick Duvaut

IPC分类号： H04M1/24 ,  H04M3/08 ,  H04M3/22

CPC分类号： H04M3/302

摘要： Disclosed are various embodiments for determining a state of loop termination. One embodiment comprises receiving an un-calibrated echo signal for the loop under test using frequency domain reflectometry single-ended line testing (FDR-SELT) and determining the state of loop termination based on phase of the un-calibrated echo signal. The step of determining the state of loop termination comprises determining whether the loop is terminated by an open termination or a short termination by correlating the phase of the echo signal with an expected phase of the echo signal derived from measurements taken at the same loop length for open and short terminations. For other embodiments, the amplitude of the un-calibrated echo signal is analyzed to determine whether the loop is terminated by a matched-impedance termination.

摘要翻译： 公开了用于确定环路终止状态的各种实施例。 一个实施例包括使用频域反射测试单端线测试（FDR-SELT）接收待测环路的未校准回波信号，并且基于未经校准的回波信号的相位确定环路终止状态。 确定环路终止状态的步骤包括通过将回波信号的相位与从在相同环路长度处获取的测量得到的回波信号的预期相位相关联来确定环路是否由开放终止或短终端终止， 开放和短暂终止。 对于其他实施例，分析未校准的回波信号的幅度，以确定环路是否由匹配阻抗终端终止。

公开(公告)号：US08126038B2

公开(公告)日：2012-02-28

申请号：US12392039

申请日：2009-02-24

申请人： Patrick Duvaut ,  Ehud Langberg

发明人： Patrick Duvaut ,  Ehud Langberg

IPC分类号： H04B1/38

CPC分类号： H04Q11/04 ,  H04Q2213/13039 ,  H04Q2213/13094 ,  H04Q2213/13204 ,  H04Q2213/13396

摘要： The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatically check for physical layer status in terms of spectral compatibility and, thus, automatically optimize the boosted mode with the use of the mask selectable system choose the best combination of upstream/downstream masks in any physical layer noise scenario.

摘要翻译： 本发明通过定义两个上游掩码（U1，U2）和两个下行掩码（D1，D2）并使用用于长距离数字用户线（LDSL）的掩码可选择系统来克服各种问题，其中唯一的调制解调器特征被激活 在握手期间，根据频谱兼容性自动检查物理层状态，因此，使用掩码可选择系统自动优化升压模式，在任何物理层噪声场景中选择上游/下游掩码的最佳组合。