公开(公告)号：US09860188B2

公开(公告)日：2018-01-02

申请号：US13334306

申请日：2011-12-22

申请人： William J. Armstrong ,  Claude Basso ,  Chih-Jen Chang ,  Mircea Gusat ,  Cyriel J. Minkenberg ,  Fredy D. Neeser ,  Kenneth M. Valk

发明人： William J. Armstrong ,  Claude Basso ,  Chih-Jen Chang ,  Mircea Gusat ,  Cyriel J. Minkenberg ,  Fredy D. Neeser ,  Kenneth M. Valk

IPC分类号： G06F15/173 ,  G06F15/16 ,  H04L12/911 ,  H04L12/46

CPC分类号： H04L47/78 ,  H04L12/465

摘要： IEEE 802.1Q and Enhanced Transmission Selection provide only eight different traffic classes that may be used to control bandwidth in a particular physical connection (or link). Instead of relying only on these eight traffic classes to manage bandwidth, the embodiments discussed herein disclose using an Enhanced Transmission Selection scheduler that permits a network device to set the bandwidth for an individual virtual LAN. Allocating bandwidth in a port based on a virtual LAN ID permits a network device to allocate bandwidth to, e.g., millions of unique virtual LANs. Thus, this technique may increase the granular control of the network fabric and its performance.

公开(公告)号：US08667205B2

公开(公告)日：2014-03-04

申请号：US13459548

申请日：2012-04-30

申请人： Nikolaos I. Chrysos ,  Fredy D. Neeser ,  Kenneth M. Valk

发明人： Nikolaos I. Chrysos ,  Fredy D. Neeser ,  Kenneth M. Valk

IPC分类号： G06F13/36

CPC分类号： H04L47/39

摘要： A system for deadlock resolution in end-to-end credit protocol includes a plurality of source controllers configured to receive data frames on an incoming link, wherein each source controller includes a plurality of credit counters. The system also includes a plurality of end controllers configured to receive data frames from the plurality of source controllers, wherein each end controller includes a buffer credit counter, a plurality of request counters, and an output buffer. Each of the plurality of credit counters corresponds to one of the plurality of end controllers and stores a number of credits received from that end controller. The buffer credit counter of each end controller stores a number of available credits of the end controllers. Each of the request counters corresponds to one of the plurality of source controllers and stores a number of credit requests received from that source controller.

摘要翻译： 用于端对端信用协议中的死锁解析的系统包括多个源控制器，被配置为在传入链路上接收数据帧，其中每个源控制器包括多个信用计数器。 该系统还包括配置成从多个源控制器接收数据帧的多个终端控制器，其中每个终端控制器包括缓冲器信用计数器，多个请求计数器和输出缓冲器。 多个信用计数器中的每一个对应于多个终端控制器中的一个，并存储从该终端控制器接收到的信用数量。 每个终端控制器的缓冲区信用计数器存储终端控制器的许多可用信用。 每个请求计数器对应于多个源控制器中的一个，并且存储从该源控制器接收的许多信用请求。

公开(公告)号：US08655974B2

公开(公告)日：2014-02-18

申请号：US12771232

申请日：2010-04-30

申请人： Philip Frey ,  Bernard Metzler ,  Fredy D. Neeser

发明人： Philip Frey ,  Bernard Metzler ,  Fredy D. Neeser

IPC分类号： G06F15/167

CPC分类号： G06F9/544

摘要： A method for data transmission on a device without intermediate buffering is provided. An application request is received to transmit data from the device to a second device over a network. The data from application memory is formatted for transmitting to the second device. The data are transmitted from the device to the second device without intermediate buffering. A send state is retrieved. The send state is compared to expected send state. If the send state meets the expected send state, a completion of the data transmit request is generated.

摘要翻译： 提供了一种在没有中间缓冲的设备上进行数据传输的方法。 接收应用请求以通过网络将数据从设备传输到第二设备。 来自应用存储器的数据被格式化以便发送到第二设备。 数据从设备传输到第二设备，而无需中间缓冲。 发送状态被检索。 发送状态与预期发送状态进行比较。 如果发送状态满足预期发送状态，则生成数据发送请求的完成。

公开(公告)号：US20110106905A1

公开(公告)日：2011-05-05

申请号：US12609586

申请日：2009-10-30

申请人： Philip W. Frey ,  Bernard Metzler ,  Fredy D. Neeser

发明人： Philip W. Frey ,  Bernard Metzler ,  Fredy D. Neeser

IPC分类号： G06F15/167

CPC分类号： H04L69/166 ,  H04L69/16 ,  H04L69/161

摘要： Exemplary embodiments include RDMA methods and systems for sending application data to a computer memory destination in a direct but non-blocking fashion. The method can include posting a new work request for an RDMA connection or association, determining if there is a prior work request for the same connection or association enqueued for processing, in response to a determination that no prior work request is enqueued for processing, processing the new work request directly by sending RDMA frames containing application data referred to by the work request to the computer memory destination, performing direct sending while there is sufficient send space to process the new work request, and delegating the new work request to asynchronous transmission if a prior work request is already enqueued for processing or lack of send space would block a subsequent transmission operation.

摘要翻译： 示例性实施例包括用于以直接但非阻塞方式将应用数据发送到计算机存储器目的地的RDMA方法和系统。 该方法可以包括对RDMA连接或关联发布新的工作请求，确定是否存在用于处理的相同连接或关联的先前工作请求，以响应于确定没有先前的工作请求被入队用于处理，处理 通过将包含由工作请求引用的应用数据的RDMA帧发送到计算机存储器目的地直接发送新的工作请求，在存在足够的发送空间来处理新的工作请求的同时执行直接发送，并且将新的工作请求委托给异步传输，如果 先前工作请求已经入队处理或缺少发送空间将阻止后续的传输操作。

公开(公告)号：US06757325B1

公开(公告)日：2004-06-29

申请号：US09430698

申请日：1999-10-29

申请人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Ajay Dholakia ,  Dongming Hwang ,  Fredy D. Neeser ,  Robert John Schule ,  Malcolm Scott Ware ,  Hua Ye

发明人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Ajay Dholakia ,  Dongming Hwang ,  Fredy D. Neeser ,  Robert John Schule ,  Malcolm Scott Ware ,  Hua Ye

IPC分类号： H04L516

CPC分类号： H04L25/4927

摘要： Methods, modems and computer program products for detecting whether a remote modem is of a particular design type and for adjusting the communication configuration for a communication session based on a type of the remote modem. The modem type is recognized based on a knowledge that the modem design of certain manufacturers has a unique associated data pattern contained within the startup communication sequence which is not specified by the protocol but which can be demodulated and detected to thereby recognize that the remote modem is a particular manufacturer's design type. Based on knowledge of the characteristics of the remote modem design, various steps are taken which may improve performance of the communication connection in light of the particular modem design's characteristics. For example, a different Total Harmonic Distortion (THD) threshold may be used for falling back to V.34 communications when the remote modem design only supports up to 2 look ahead for spectrum shaping.

摘要翻译： 用于检测远程调制解调器是否是特定设计类型的方法，调制解调器和计算机程序产品，以及用于基于远程调制解调器的类型来调整通信会话的通信配置。 基于知道某些制造商的调制解调器设计具有包含在启动通信序列内的唯一关联数据模式的知识，可以识别调制解调器类型，该数据模式不是由协议规定的，而是可以被解调和检测，从而识别远程调制解调器 特定制造商的设计类型。 基于对远程调制解调器设计的特征的了解，采取了各种步骤，可以根据特定的调制解调器设计的特性改善通信连接的性能。 例如，当远程调制解调器设计仅支持最多2个前进用于频谱整形时，可以使用不同的总谐波失真（THD）阈值来回退到V.34通信。

公开(公告)号：US06665336B2

公开(公告)日：2003-12-16

申请号：US10428357

申请日：2003-05-02

申请人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Jeffrey Haskell Derby ,  Ajay Dholakia ,  Evangelos Stavros Eleftheriou ,  Dongming Hwang ,  Fredy D. Neeser ,  Malcolm Scott Ware ,  Hua Ye

发明人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Jeffrey Haskell Derby ,  Ajay Dholakia ,  Evangelos Stavros Eleftheriou ,  Dongming Hwang ,  Fredy D. Neeser ,  Malcolm Scott Ware ,  Hua Ye

IPC分类号： H04B1700

CPC分类号： H04L1/0021 ,  H04L1/0002 ,  H04L25/03057 ,  H04L25/4927 ,  H04L2025/03388 ,  Y02D50/10

摘要： Modems, methods, and computer program products select a data rate based on error signals in a modem. In an illustrative embodiment, error signals representing the difference between an output of an equalizer and an output of a detector are accumulated and an average error value is computed therefrom. A signal to noise ratio is determined using the average error value. The signal to noise ratio is then used to select a data rate. In another illustrative embodiment, the mean squared error at the output of the equalizer is determined and then used, along with the probability of error in correctly detecting a symbol, to select a data rate. Incorrect decisions in detecting received data symbols can cause a catastrophic failure in a decision feedback equalizer used in a modem receiver as errors are repeatedly fed back causing the tap coefficients for the equalizer filters to be shifted from their normal operating values. By adjusting the data rate in accordance with the error signals generated in a modem receiver, the decision feedback equalizer can operate with greater stability as the data rate can be reduced in response to increased noise conditions.

摘要翻译： 调制解调器，方法和计算机程序产品根据调制解调器中的错误信号选择数据速率。 在说明性实施例中，代表均衡器的输出和检测器的输出之间的差的误差信号被累加，并且从其计算出平均误差值。 使用平均误差值确定信噪比。 然后使用信噪比来选择数据速率。 在另一说明性实施例中，确定均衡器的输出处的均方误差，然后与正确检测符号的误差概率一起使用以选择数据速率。 检测接收到的数据符号时的不正确决定可能导致在调制解调器接收机中使用的判决反馈均衡器中的灾难性故障，因为错误被反复反馈，导致均衡器滤波器的抽头系数从其正常操作值偏移。 通过根据在调制解调器接收机中产生的误差信号来调整数据速率，当响应于增加的噪声条件可以减小数据速率时，判决反馈均衡器可以更稳定地工作。

公开(公告)号：US06650657B1

公开(公告)日：2003-11-18

申请号：US09429859

申请日：1999-10-29

申请人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Ajay Dholakia ,  Dongming Hwang ,  Fredy D. Neeser ,  Malcolm Scott Ware ,  Hua Ye

发明人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Ajay Dholakia ,  Dongming Hwang ,  Fredy D. Neeser ,  Malcolm Scott Ware ,  Hua Ye

IPC分类号： H04J324

CPC分类号： H04J3/125

摘要： Robbed Bit Signaling (RBS) and PAD digital impairments in sets of Digital Impairment Learning (DIL) signals that are repeatedly transmitted from a server modem to a client modem during DIL intervals are identified by identifying a PAD level for the sets of DIL signals in the DIL intervals and then identifying an RBS type for individual sets of DIL signals based upon the PAD levels so identified. The PAD level may be identified using model DIL signals that correspond to PAD levels that are not subject to RBS. The RBS type may be identified using model DIL signals that correspond to multiple RBS types that are subject to the identified PAD level. More specifically, one of the DIL intervals that contains DIL signals that are not subject to RBS is identified. A PAD level for the DIL signals in the one of the DIL intervals so identified then is determined. The PAD level that was determined is applied to the DIL signals in remaining ones of the DIL intervals, to identify an RBS for the DIL signals in the remaining ones of the DIL intervals.

摘要翻译： 通过在DIL间隔期间从服务器调制解调器重复发送到客户端调制解调器的数字损伤学习（DIL）信号中的Robbed位信令（RBS）和PAD数字损伤被识别为DIL信号组中的PAD电平 DIL间隔，然后基于所识别的PAD水平识别用于各组DIL信号的RBS类型。 可以使用对应于不受RBS的PAD电平的模型DIL信号来识别PAD电平。 可以使用对应于经受所识别的PAD电平的多个RBS类型的模型DIL信号来识别RBS类型。 更具体地，识别包含不受RBS的DIL信号的DIL间隔之一。 确定如此识别的DIL间隔之一中的DIL信号的PAD电平。 将确定的PAD电平应用于DIL间隔中剩余的DIL信号，以识别DIL间隔中剩余的DIL信号中的DBS信号的RBS。

公开(公告)号：US06341360B1

公开(公告)日：2002-01-22

申请号：US09264094

申请日：1999-03-08

申请人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Jeffrey Haskell Derby ,  Ajay Dholakia ,  Evangelos Stavros Eleftheriou ,  Dongming Hwang ,  Fredy D. Neeser ,  Malcolm Scott Ware ,  Hua Ye

发明人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Jeffrey Haskell Derby ,  Ajay Dholakia ,  Evangelos Stavros Eleftheriou ,  Dongming Hwang ,  Fredy D. Neeser ,  Malcolm Scott Ware ,  Hua Ye

IPC分类号： G06F1100

CPC分类号： H04L25/4927 ,  H04L25/03057 ,  H04L2025/03363 ,  H04L2025/03694

摘要： Decision feedback equalizers having a stabilization capability, and methods and computer program products for stabilizing a decision feedback equalizer under severe error conditions use output samples from an equalizer to determine whether a severe error event has occurred in accordance with predefined criteria. If a severe error occurs, then a determination is made to evaluate whether the number of severe errors that have occurred has exceeded a threshold. If the threshold has been exceeded, then the coefficients for the filter(s) in the decision feedback equalizer are preserved in their current state. Severe errors can cause the equalizer filter coefficients to be pulled away from their normal operating values, which can result in several modulation cycles passing before the coefficients are restored. By preserving the equalizer filter coefficients under severe error conditions, the present invention prevents sharp or dramatic changes to the coefficient values from their steady state values allowing the decision feedback equalizer to recover more quickly from the errors.

摘要翻译： 具有稳定能力的判决反馈均衡器，以及用于在严重误差条件下稳定判决反馈均衡器的方法和计算机程序产品，使用来自均衡器的输出样本来确定是否根据预定标准发生严重错误事件。 如果发生严重的错误，则进行判断，以评估发生的严重错误的数量是否超过阈值。 如果超过阈值，则判决反馈均衡器中滤波器的系数保持在其当前状态。 严重的错误可能导致均衡器滤波器系数从其正常工作值被拉开，这可能导致在系数恢复之前通过的多个调制周期。 通过在严重的误差条件下保持均衡器滤波器系数，本发明防止系数值从其稳定状态值的急剧或显着变化，从而允许判决反馈均衡器从错误中更快地恢复。

公开(公告)号：US08769036B2

公开(公告)日：2014-07-01

申请号：US12609586

申请日：2009-10-30

申请人： Philip W. Frey ,  Bernard Metzler ,  Fredy D. Neeser

发明人： Philip W. Frey ,  Bernard Metzler ,  Fredy D. Neeser

IPC分类号： G06F15/167

CPC分类号： H04L69/166 ,  H04L69/16 ,  H04L69/161

摘要： Exemplary embodiments include RDMA methods and systems for sending application data to a computer memory destination in a direct but non-blocking fashion. The method can include posting a new work request for an RDMA connection or association, determining if there is a prior work request for the same connection or association enqueued for processing, in response to a determination that no prior work request is enqueued for processing, processing the new work request directly by sending RDMA frames containing application data referred to by the work request to the computer memory destination, performing direct sending while there is sufficient send space to process the new work request, and delegating the new work request to asynchronous transmission if a prior work request is already enqueued for processing or lack of send space would block a subsequent transmission operation.

摘要翻译： 示例性实施例包括用于以直接但非阻塞方式将应用数据发送到计算机存储器目的地的RDMA方法和系统。 该方法可以包括对RDMA连接或关联发布新的工作请求，确定是否存在用于处理的相同连接或关联的先前工作请求，以响应于确定没有先前的工作请求被入队用于处理，处理 通过将包含由工作请求引用的应用数据的RDMA帧发送到计算机存储器目的地直接发送新的工作请求，在存在足够的发送空间来处理新的工作请求的同时执行直接发送，并且将新的工作请求委托给异步传输，如果 先前工作请求已经入队处理或缺少发送空间将阻止后续的传输操作。

公开(公告)号：US07003030B2

公开(公告)日：2006-02-21

申请号：US10635194

申请日：2003-08-06

申请人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Jeffrey Haskell Derby ,  Ajay Dholakia ,  Evangelos Stavros Eleftheriou ,  Robert F. H. Fischer ,  Dongming Hwang ,  Fredy D. Neeser ,  Malcolm Scott Ware ,  Hua Ye

发明人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Jeffrey Haskell Derby ,  Ajay Dholakia ,  Evangelos Stavros Eleftheriou ,  Robert F. H. Fischer ,  Dongming Hwang ,  Fredy D. Neeser ,  Malcolm Scott Ware ,  Hua Ye

IPC分类号： H03K5/159

CPC分类号： H04L7/0062 ,  H04L7/0029 ,  H04L2025/03363 ,  H04L2025/0342 ,  H04L2025/0349

摘要： Receivers, methods, and computer program products can be used to demodulate a data signal transmitted from a digital source, which has a network sampling rate that is synchronized with a network clock. In an illustrative embodiment, a receiver includes a two-stage interpolator that receives digital samples of the data signal as an input and produces an interpolated digital sample stream to be filtered by an adaptive fractionally spaced decision feedback equalizer. The digital samples received in the interpolator are synchronized with a local clock; however, the interpolated sample stream is synchronized with the network clock. A slicer generates symbols for the samples output from the decision feedback equalizer by comparing the samples with a reference signaling alphabet. The receiver can be used in a V.90 client modem to demodulate pulse code modulated (PCM) data transmitted as pulse amplitude modulated (PAM) signals from a digital network. In addition, the receiver is compatible with legacy analog modem front ends and transmitters. The two-stage interpolator allows the timing synchronization to be performed with extremely fine granularity, which can be useful in PCM modems that typically require relatively high signal to noise ratios.

摘要翻译： 接收器，方法和计算机程序产品可用于解调从具有与网络时钟同步的网络采样速率的数字源发送的数据信号。 在说明性实施例中，接收机包括二阶插值器，其接收作为输入的数据信号的数字样本，并产生经过自适应分数间隔的判决反馈均衡器滤波的内插数字样本流。 在内插器中接收的数字样本与本地时钟同步; 然而，插值的采样流与网络时钟同步。 切片器通过将样本与参考信号字母表进行比较来生成从判决反馈均衡器输出的样本的符号。 接收机可用于V.90客户端调制解调器中，以解调从数字网络传输的脉冲编码调制（PCM）数据作为脉冲幅度调制（PAM）信号。 此外，接收机与传统模拟调制解调器前端和发射机兼容。 两级内插器允许以非常精细的粒度执行定时同步，这在通常需要相对较高的信噪比的PCM调制解调器中是有用的。