公开(公告)号：US20060126707A1

公开(公告)日：2006-06-15

申请号：US11009710

申请日：2004-12-13

Applicant: Patrick Duvaut ,  Ehud Langberg ,  Anupama Ramalingam

Inventor： Patrick Duvaut ,  Ehud Langberg ,  Anupama Ramalingam

IPC: H04L5/16

CPC classification number: H04B3/32 ,  H04B3/487

Abstract: A method and apparatus implements a Virtual Exchange Reference Impact (VERI) technique to define a pattern to shape the spectrum of a cabinet deployed system to minimize its impact, e.g., FEXT, into an exchange deployed system while achieving effective cabinet system performance, e.g., in terms of data transmission rate. The invention shapes the cabinet system to replicate a self-impact of the exchange system on itself based on the known distance of the cabinet from the exchange. The shaping is required when both exchange and cabinet systems share the same bundle and exhibit overlapped bandwidths. A particular example consists of VDSL deployed from remote cabinet impacting ADSL2/ADSL2+ deployed from the exchange.

Abstract translation: 一种方法和装置实现了虚拟交换参考影响（VERI）技术，以定义一种模式来形成柜部署系统的频谱，以将其影响（例如FEXT）最小化到交换部署系统中，同时实现有效的机柜系统性能， 在数据传输率方面。 本发明根据柜与交换机的已知距离对橱柜系统进行整形以将交换系统的自身影响复制到其自身上。 交换和机柜系统共享相同的捆绑包并展示重叠的带宽时，需要进行整形。 一个特定的例子包括从远程机柜部署的VDSL，影响从交换机部署的ADSL2 / ADSL2 +。

公开(公告)号：US20050018837A1

公开(公告)日：2005-01-27

申请号：US10849569

申请日：2004-05-20

Applicant: Patrick Duvaut ,  Ehud Langberg ,  Albert Rapaport ,  William Sholtz ,  Faina Shmulyian

Inventor： Patrick Duvaut ,  Ehud Langberg ,  Albert Rapaport ,  William Sholtz ,  Faina Shmulyian

IPC: H04L27/26 ,  H04M1/24 ,  H04M3/08 ,  H04M3/22

CPC classification number: H04L27/2602 ,  H04L27/2614

Abstract: The present invention is directed to implementing theoretical foundations of frequency domain methods aiming to locally decrease the impact of aggregate side lobes of a few discrete frequency tones, in the vicinity of other “victim” frequencies. The family of frequency methods referred to makes use of one or more “canceller tones.” The “canceller tones” loads are optimized to minimize the aggregate power in the neighborhood of the victim frequencies. An exemplary method for decreasing an impact of aggregate side lobes of one or more discrete frequency tones in the vicinity of one or more victim tones comprises the steps of calculating an aggregate power of one or more side lobes of one or more disturber tones within a victim bandwidth; determining at least one optimal load to minimize the aggregate power wherein the at least one optimal load comprises a linear combination of the one or more disturber tones; and applying the at least one optimal load to one or more canceller tones for minimizing the impact of the one or more side lobes of the one or more disturber tones.

Abstract translation: 本发明旨在实现频域方法的理论基础，旨在局部地减小在其他“受害者”频率附近的几个离散频率的聚集旁瓣的影响。 所提及的频率方法族使用一个或多个“消除音”。 优化“消除音”负载以最小化受害者频率附近的总功率。 减少一个或多个受害音调附近的一个或多个离散频率音调的聚集旁瓣的影响的示例性方法包括以下步骤：计算受害者中一个或多个干扰音的一个或多个旁波的总功率 带宽; 确定至少一个最佳负载以最小化所述总功率，其中所述至少一个最佳负载包括所述一个或多个干扰调制音的线性组合; 以及将所述至少一个最佳负载应用于一个或多个消除器音调，以最小化一个或多个干扰音调的一个或多个旁瓣的影响。

公开(公告)号：US08532147B2

公开(公告)日：2013-09-10

申请号：US13554861

申请日：2012-07-20

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

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

IPC: H04J1/02 ,  H04M11/00

CPC classification number: H04M3/4281 ,  H04M3/02 ,  H04M3/18 ,  H04M3/42365 ,  H04M7/006 ,  H04M2203/156

Abstract: 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.

Abstract translation: 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线路的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：US07813434B2

公开(公告)日：2010-10-12

申请号：US11559772

申请日：2006-11-14

Applicant: Yan Wu ,  Lujing Cai ,  William Scholtz ,  Ehud Langberg

Inventor： Yan Wu ,  Lujing Cai ,  William Scholtz ,  Ehud Langberg

IPC: H04K1/10 ,  H04L27/28

CPC classification number: H04L27/2608 ,  H04L1/0006 ,  H04L1/0009 ,  H04L1/0057 ,  H04L1/0058 ,  H04L1/006 ,  H04L1/007 ,  H04L5/14

Abstract: Systems and methods for performing bit loading in a dual latency data transmission system. In a computer network, such as an XDSL-based network, carrier channels are allocated between two latency paths. Error sensitive information is transmitted over a latency path employing one or more forward error correction techniques. Latency sensitive information that is relatively more tolerant of errors is transmitted over the other latency path. Rather than employing the lowest coding gain for carrier channels having the two different latency paths, the highest coding gain for each path is used by applying different target S-N-R margins for carrier channels having different latency paths.

Abstract translation: 用于在双延迟数据传输系统中执行比特加载的系统和方法。 在诸如基于XDSL的网络的计算机网络中，在两个等待时间路径之间分配载波信道。 误差敏感信息通过采用一个或多个前向纠错技术的等待时间路径传输。 通过另一个等待时间路径发送相对更容忍错误的延迟敏感信息。 不是对具有两个不同等待时间路径的载波信道采用最低的编码增益，而是通过对具有不同等待时间路径的载波信道应用不同的目标S-N-R边缘来使用每个路径的最高编码增益。

公开(公告)号：US07352805B2

公开(公告)日：2008-04-01

申请号：US11282109

申请日：2005-11-18

Applicant: Ehud Langberg ,  Lujing Cai

Inventor： Ehud Langberg ,  Lujing Cai

IPC: H03H7/30

CPC classification number: H04L5/1438 ,  H04B17/0085 ,  H04L25/03012 ,  H04L25/03019 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2628 ,  H04L27/265 ,  H04L2025/03414 ,  H04L2025/03445 ,  H04L2025/03585

Abstract: A method and system for enhancing reach-performance of a multi-carrier VDSL System estimates loop length, estimates maximum available bandwidth that can be utilized at that particular loop length, optimally selects an FFT size and sampling rate, and decides whether to apply a time domain equalization to its receiver and if so, selects a cyclic extension size. To minimize the implementation complexity, the sampling frequencies at receiver and transmitter are lowered to match the actual usable bandwidth. The FFT/IFFT sizes in the implementation are also required to set appropriately accordingly.

Abstract translation: 一种用于增强多载波VDSL系统的达到性能的方法和系统估计环路长度，估计可以在该特定环路长度下使用的最大可用带宽，最佳地选择FFT大小和采样率，并且决定是否应用时间 域均衡到其接收器，如果是，则选择循环扩展大小。 为了最小化实现复杂度，降低接收机和发射机的采样频率以匹配实际可用带宽。 执行中的FFT / IFFT大小也需要适当地进行设置。

公开(公告)号：US20050010853A1

公开(公告)日：2005-01-13

申请号：US10860286

申请日：2004-06-04

Applicant: Patrick Duvant ,  Ehud Langberg ,  Julien Pons ,  William Sholtz

Inventor： Patrick Duvant ,  Ehud Langberg ,  Julien Pons ,  William Sholtz

IPC: H03M13/25 ,  H04L1/00 ,  H03D3/22 ,  H03M13/03 ,  H04L27/22

CPC classification number: H04L1/006 ,  H03M13/255 ,  H03M13/256 ,  H03M13/635 ,  H04L1/0041 ,  H04L1/0066 ,  H04L1/007

Abstract: Disclosed herein are various techniques for multilevel channel coding. For a given binary word comprising a plurality of bits, the least-significant bit may be encoded by a boosted coding technique, such as turbo channel coding or low density parity check (LDPC) channel coding. A subset of the remaining bits of the binary word may be encoded using trellis coded modulation (TCM) coding. The results of the boosted channel coding and the TCM coding may be mapped to one or more symbols. The one or more symbols then may be transmitted to a receiver using transmission techniques well known to those skilled in the art. The present invention finds particular benefit in digital subscriber line (DSL)-based systems in accord with the ITU G.992-1 Recommendation and similar standards.

Abstract translation: 这里公开了用于多电平信道编码的各种技术。 对于包括多个位的给定二进制字，最低有效位可以通过诸如turbo信道编码或低密度奇偶校验（LDPC）信道编码的增强编码技术来编码。 可以使用网格编码调制（TCM）编码对二进制字的剩余位的子集进行编码。 增强的信道编码和TCM编码的结果可以映射到一个或多个符号。 然后可以使用本领域技术人员公知的传输技术将一个或多个符号发送到接收机。 本发明在符合ITU G.992-1建议书和类似标准的基于数字用户线路（DSL）的系统中特别有益。

公开(公告)号：US20120287923A1

公开(公告)日：2012-11-15

申请号：US13554861

申请日：2012-07-20

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

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

IPC: H04L12/66

CPC classification number: H04M3/4281 ,  H04M3/02 ,  H04M3/18 ,  H04M3/42365 ,  H04M7/006 ,  H04M2203/156

Abstract: 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.

Abstract translation: 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：US20090257430A1

公开(公告)日：2009-10-15

申请号：US12427698

申请日：2009-04-21

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

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

IPC: H04L12/66

CPC classification number: H04M3/4281 ,  H04M3/02 ,  H04M3/18 ,  H04M3/42365 ,  H04M7/006 ,  H04M2203/156

Abstract: 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.

Abstract translation: 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：US07400693B2

公开(公告)日：2008-07-15

申请号：US11197524

申请日：2005-08-05

Applicant: Ehud Langberg ,  Lujing Cai ,  Albert Rapaport

Inventor： Ehud Langberg ,  Lujing Cai ,  Albert Rapaport

IPC: H03D1/04

CPC classification number: H04B3/23

Abstract: 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.

Abstract translation: 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

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

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

IPC: H04L5/16

CPC classification number: H04L5/1438 ,  H04L27/2608

Abstract: 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.

Abstract translation: 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。