公开(公告)号：US20120287923A1

公开(公告)日：2012-11-15

申请号：US13554861

申请日：2012-07-20

申请人： William Scholtz ,  Ben Chan ,  Ehud Langberg ,  Shareq Rahman ,  Xy Chen ,  James Zhang

发明人： William Scholtz ,  Ben Chan ,  Ehud Langberg ,  Shareq Rahman ,  Xy Chen ,  James Zhang

IPC分类号： H04L12/66

CPC分类号： H04M3/4281 ,  H04M3/02 ,  H04M3/18 ,  H04M3/42365 ,  H04M7/006 ,  H04M2203/156

摘要： A method and system are provided for preventing data loss in a VoIP system. In particular, during a VoIP call, it is determined whether incoming ringing on a POTS line causes an unacceptable level of signal loss or errors. If so, for subsequent VoIP calls, the CO handling calls to the POTS line is instructed to either answer each call with a busy signal or automatically forward calls to the POTS line to the VoIP line or other selected telephone. Calling returns to normal upon ending of the VoIP call. In this manner, incoming ringing on the POTS line does not result in call dropping or lengthy retraining processes.

摘要翻译： 提供了一种防止VoIP系统中的数据丢失的方法和系统。 特别地，在VoIP呼叫期间，确定POTS线上的输入振铃是否导致不可接受的信号丢失或错误的水平。 如果是这样，对于随后的VoIP呼叫，指示对POTS线的CO处理呼叫以忙信号来应答每个呼叫，或者自动将呼叫转移到VoIP线路或其他所选电话的POTS线路。 呼叫结束时呼叫恢复正常。 以这种方式，POTS线路上的呼入不会导致呼叫丢失或冗长的再训练过程。

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。

公开(公告)号：US20110200140A1

公开(公告)日：2011-08-18

申请号：US13091651

申请日：2011-04-21

申请人： Patrick Duvaut ,  Amitkumar Mahadevan ,  Massimo Sorbara ,  Ehud Langberg

发明人： Patrick Duvaut ,  Amitkumar Mahadevan ,  Massimo Sorbara ,  Ehud Langberg

IPC分类号： H04L25/49

CPC分类号： H04B3/32 ,  H04L1/0042

摘要： One embodiment is a method for precoding data for transmission in a discrete multi-tone (DMT) system to cancel self-induced far end crosstalk (self-FEXT). The method comprises learning, by the system, characteristics associated with a plurality of N users within a digital subscriber line (xDSL) system to determine an initial off-diagonal multiple input multiple output (MIMO) precoder (ODMP) for a given tone frequency and converging towards an ODMP from the initial ODMP to cancel self-FEXT for the plurality of N users, wherein the ODMP is represented as a zero diagonal matrix containing only off-diagonal terms.

摘要翻译： 一个实施例是用于在离散多音（DMT）系统中预编码用于传输的数据以消除自感应远端串扰（self-FEXT）的方法。 该方法包括通过系统学习与数字用户线（xDSL）系统内的多个N个用户相关联的特征，以确定给定音频的初始非对角多输入多输出（MIMO）预编码器（ODMP），以及 从初始ODMP收敛到ODMP以取消多个N个用户的自身FEXT，其中ODMP被表示为仅包含非对角项的零对角矩阵。

公开(公告)号：US07957477B2

公开(公告)日：2011-06-07

申请号：US11845040

申请日：2007-08-25

申请人： Patrick Duvaut ,  Amitkumar Mahadevan ,  Massimo Sorbara ,  Ehud Langberg

发明人： Patrick Duvaut ,  Amitkumar Mahadevan ,  Massimo Sorbara ,  Ehud Langberg

IPC分类号： H04L27/28

CPC分类号： H04B3/32 ,  H04L1/0042

摘要： Systems and methods for off-diagonal MIMO precoders are described. At least one embodiment includes a method for precoding data for transmission in a discrete multi-tone (DMT) xDSL system to cancel self-induced far end crosstalk (self-FEXT) comprising: learning characteristics associated with a plurality of N users within the xDSL system to determine an initial off-diagonal multiple input multiple output (MIMO) precoder (ODMP) for a given tone frequency; and converging towards an optimum ODMP from the initial ODMP in order to cancel downstream self-FEXT for the plurality of N users, wherein the ODMP is represented as a zero diagonal matrix with only off-diagonal terms, and wherein the converging towards the optimum ODMP comprises: maximizing the channel capacity for the plurality of N users for the given tone frequency; and minimizing an increase in transmit power of the xDSL system relative to an original transmit power where a precoder is not active.

摘要翻译： 描述了非对角MIMO预编码器的系统和方法。 至少一个实施例包括用于预编码用于在离散多音（DMT）xDSL系统中传输的数据以消除自感应远端串扰（self-FEXT）的方法，包括：与xDSL内的多个N个用户相关联的学习特征 系统确定用于给定音频的初始非对角多输入多输出（MIMO）预编码器（ODMP）; 并从最初的ODMP收敛到最佳的ODMP，以消除多个N个用户的下游自身FEXT，其中ODMP被表示为只有非对角项的零对角矩阵，并且其中朝向最佳ODMP 包括：使给定音调频率的多个N个用户的信道容量最大化; 并且最小化xDSL系统相对于预编码器不活动的原始发射功率的发射功率的增加。

公开(公告)号：US20090257430A1

公开(公告)日：2009-10-15

申请号：US12427698

申请日：2009-04-21

申请人： William Scholtz ,  Ben Chan ,  Ehud Langberg ,  Shareq Rahman ,  Xy Chen ,  James Zhang

发明人： William Scholtz ,  Ben Chan ,  Ehud Langberg ,  Shareq Rahman ,  Xy Chen ,  James Zhang

IPC分类号： H04L12/66

CPC分类号： H04M3/4281 ,  H04M3/02 ,  H04M3/18 ,  H04M3/42365 ,  H04M7/006 ,  H04M2203/156

摘要： A method and system are provided for preventing data loss in a VoIP system. In particular, during a VoIP call, it is determined whether incoming ringing on a POTS line causes an unacceptable level of signal loss or errors. If so, for subsequent VoIP calls, the CO handling calls to the POTS line is instructed to either answer each call with a busy signal or automatically forward calls to the POTS line to the VoIP line or other selected telephone. Calling returns to normal upon ending of the VoIP call. In this manner, incoming ringing on the POTS line does not result in call dropping or lengthy retraining processes.

摘要翻译： 提供了一种防止VoIP系统中的数据丢失的方法和系统。 特别地，在VoIP呼叫期间，确定POTS线上的输入振铃是否导致不可接受的信号丢失或错误的水平。 如果是这样，对于随后的VoIP呼叫，指示对POTS线的CO处理呼叫以忙信号来应答每个呼叫，或者自动将呼叫转移到VoIP线路或其他所选电话的POTS线路。 呼叫结束时呼叫恢复正常。 以这种方式，POTS线路上的呼入不会导致呼叫丢失或冗长的再训练过程。

公开(公告)号：US07400710B2

公开(公告)日：2008-07-15

申请号：US10808549

申请日：2004-03-25

申请人： Ehud Langberg ,  William Scholtz ,  Lujing Cai ,  Albert Rapaport ,  Shareq Rahman ,  Patrick Duvaut

发明人： Ehud Langberg ,  William Scholtz ,  Lujing Cai ,  Albert Rapaport ,  Shareq Rahman ,  Patrick Duvaut

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

CPC分类号： H04L5/023 ,  H04L1/0026 ,  H04L27/2608

摘要： A system and method for multiple inputs, multiple outputs (MIMO) PSD allocation in a DSL system is disclosed. In some embodiments, the method may comprise monitoring system performance by performing a multi-ended line test (MELT), processing the MELT and allocating PSD based on at least one of system coupling power and system traffic.

摘要翻译： 公开了DSL系统中的多输入多输出（MIMO）PSD分配的系统和方法。 在一些实施例中，该方法可以包括通过执行多端线路测试（MELT）来监视系统性能，处理MELT并且基于系统耦合功率和系统业务中的至少一个来分配PSD。

公开(公告)号：US07400693B2

公开(公告)日：2008-07-15

申请号：US11197524

申请日：2005-08-05

申请人： Ehud Langberg ,  Lujing Cai ,  Albert Rapaport

发明人： Ehud Langberg ,  Lujing Cai ,  Albert Rapaport

IPC分类号： H03D1/04

CPC分类号： H04B3/23

摘要： An economic low-complexity system and method for echo cancellation are disclosed. The system and method are particularly suited for multi-carrier VDSL using the U0 band. The techniques taught herein may be implemented in VDSL and VDSL2 systems and used to receive signals in three bands (e.g., U0, U1 and U2) simultaneously.

摘要翻译： 公开了一种用于回波消除的经济低复杂度系统和方法。 该系统和方法特别适用于使用U0频段的多载波VDSL。 本文教导的技术可以在VDSL和VDSL2系统中实现，并且用于同时在三个频带（例如，U0，U1和U2）中接收信号。

公开(公告)号：US07386040B1

公开(公告)日：2008-06-10

申请号：US11117252

申请日：2005-04-28

申请人： Lujing Cai ,  Ehud Langberg ,  Shareq Rahman ,  William H. Scholtz

发明人： Lujing Cai ,  Ehud Langberg ,  Shareq Rahman ,  William H. Scholtz

IPC分类号： H04L5/16

CPC分类号： H04L5/1438 ,  H04L27/2608

摘要： An improved ADSL modem is presented. The ADSL modem in cooperation with a remote ADSL modem will exchange manufacturer identification information during initial DSL system training to establish a DSL communication link. The improved ADSL modem may comprise a memory device containing system parameters and operational algorithms previously determined to maximize DSL link performance between ADSL modems manufactured by different vendors. The improved ADSL modem is well suited for central office applications as it provides a solution for optimizing system performance that is transparent to remotely located ADSL modems. An ADSL modem in accordance with the present invention may comprise a digital signal processor and a memory device configured to store appropriate system parameters and operational algorithms that provide an optimized DSL communication link once applied during system initialization. The present invention also provides a method for optimizing DSL system performance. The method can be described by the following steps: supplying a default manufacturer identification for a remote modem at a master modem; applying appropriate system parameters and algorithms in response to the default manufacturer identification; initializing DSL system start-up training; receiving the actual manufacturer identification for the remote modem; determining if the current system parameters and algorithms are suitable for a DSL link with the actual manufacturer; adjusting training parameters and algorithms; restarting training when required; and establishing the DSL link.

摘要翻译： 提出了一种改进的ADSL调制解调器。 与远程ADSL调制解调器协作的ADSL调制解调器将在初始DSL系统训练期间交换制造商识别信息以建立DSL通信链路。 改进的ADSL调制解调器可以包括存储设备，该存储器设备包含先前确定的用于最大化由不同供应商制造的ADSL调制解调器之间的DSL链路性能的系统参数和操作算法。 改进的ADSL调制解调器非常适合中央办公室应用，因为它提供了一种解决方案，以优化对远程定位的ADSL调制解调器透明的系统性能。 根据本发明的ADSL调制解调器可以包括数字信号处理器和被配置为存储在系统初始化期间一旦应用的提供优化的DSL通信链路的适当系统参数和操作算法的存储器设备。 本发明还提供了一种优化DSL系统性能的方法。 该方法可以通过以下步骤来描述：在主调制解调器处提供远程调制解调器的默认制造商标识; 根据默认的制造商标识应用适当的系统参数和算法; 初始化DSL系统启动培训; 接收远程调制解调器的实际制造商标识; 确定当前的系统参数和算法是否适合于与实际制造商的DSL链路; 调整训练参数和算法; 需要时重新开始训练; 并建立DSL链路。

公开(公告)号：US06967996B1

公开(公告)日：2005-11-22

申请号：US09732456

申请日：2000-12-06

申请人： Lujing Cai ,  Ehud Langberg ,  Shareq Rahman ,  William H. Scholtz

发明人： Lujing Cai ,  Ehud Langberg ,  Shareq Rahman ,  William H. Scholtz

IPC分类号： H04L5/14 ,  H04L5/16 ,  H04L27/26

CPC分类号： H04L5/1438 ,  H04L27/2608

摘要： An improved ADSL modem is presented. The ADSL modem in cooperation with a remote ADSL modem will exchange manufacturer identification information during initial DSL system training to establish a DSL communication link. The improved ADSL modem may comprise a memory device containing system parameters and operational algorithms previously determined to maximize DSL link performance between ADSL modems manufactured by different vendors. The improved ADSL modem is well suited for central office applications as it provides a solution for optimizing system performance that is transparent to remotely located ADSL modems. An ADSL modem in accordance with the present invention may comprise a digital signal processor and a memory device configured to store appropriate system parameters and operational algorithms that provide an optimized DSL communication link once applied during system initialization. The present invention also provides a method for optimizing DSL system performance. The method can be described by the following steps: supplying a default manufacturer identification for a remote modem at a master modem; applying appropriate system parameters and algorithms in response to the default manufacturer identification; initializing DSL system start-up training; receiving the actual manufacturer identification for the remote modem; determining if the current system parameters and algorithms are suitable for a DSL link with the actual manufacturer; adjusting training parameters and algorithms; restarting training when required; and establishing the DSL link.

摘要翻译： 提出了一种改进的ADSL调制解调器。 与远程ADSL调制解调器协作的ADSL调制解调器将在初始DSL系统训练期间交换制造商识别信息以建立DSL通信链路。 改进的ADSL调制解调器可以包括存储设备，该存储器设备包含先前确定的用于最大化由不同供应商制造的ADSL调制解调器之间的DSL链路性能的系统参数和操作算法。 改进的ADSL调制解调器非常适合中央办公室应用，因为它提供了一种解决方案，以优化对远程定位的ADSL调制解调器透明的系统性能。 根据本发明的ADSL调制解调器可以包括数字信号处理器和被配置为存储在系统初始化期间一旦应用的提供优化的DSL通信链路的适当系统参数和操作算法的存储器设备。 本发明还提供了一种优化DSL系统性能的方法。 该方法可以通过以下步骤来描述：在主调制解调器处提供远程调制解调器的默认制造商标识; 根据默认的制造商标识应用适当的系统参数和算法; 初始化DSL系统启动培训; 接收远程调制解调器的实际制造商标识; 确定当前的系统参数和算法是否适合于与实际制造商的DSL链路; 调整训练参数和算法; 需要时重新开始训练; 并建立DSL链路。

公开(公告)号：US20050013379A1

公开(公告)日：2005-01-20

申请号：US10874329

申请日：2004-06-24

申请人： Patrick Duvaut ,  Ehud Langberg ,  William Scholtz

发明人： Patrick Duvaut ,  Ehud Langberg ,  William Scholtz

IPC分类号： H04L27/26 ,  H04L27/00

CPC分类号： H04L1/0656 ,  H04L27/2602 ,  H04L27/2626 ,  H04L27/2647

摘要： A technique for improving multiple-channel multi-tone transmissions is disclosed. According to one particular embodiment, a method for transmitting data over at least two bonded channels is provided, wherein each of the at least two bonded channels comprises a plurality of tones. The method may comprise: transmitting a first symbol stream over a first tone in a first bonded channel and over a second tone in a second bonded channel, wherein the first tone is bonded to the second tone, and the transmissions over the first tone and the second tone are substantially in parallel; transmitting a second symbol stream over a third tone in the first bonded channel; and transmitting a third symbol stream over a fourth tone in the second bonded channel, wherein the third tone is bonded to the fourth tone, and the transmissions of the second symbol stream and the third symbol stream are substantially in parallel.

摘要翻译： 公开了一种用于改善多声道多音调传输的技术。 根据一个特定实施例，提供了一种用于在至少两个绑定信道上传输数据的方法，其中所述至少两个绑定信道中的每一个包括多个音调。 该方法可以包括：通过第一绑定信道中的第一音调和第二绑定信道中的第二音调发送第一符号流，其中第一音调被绑定到第二音调，并且通过第一音调和 第二音基本上是平行的; 在所述第一绑定信道中通过第三音调发送第二符号流; 以及在所述第二绑定信道中通过第四音调发送第三符号流，其中所述第三音调被绑定到所述第四音调，并且所述第二符号流和所述第三符号流的传输基本上是并行的。