公开(公告)号：US06823004B1

公开(公告)日：2004-11-23

申请号：US09430097

申请日：1999-10-29

申请人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Jeffrey Haskell Derby ,  Ajay Dholakia ,  Michelle Chan Granholm ,  Dongming Hwang ,  Fredy D. Neeser ,  Robert John Schule ,  Malcolm Scott Ware ,  Hua Ye ,  Charles Robert Young

发明人： Youssef Abdelilah ,  Gordon Taylor Davis ,  Jeffrey Haskell Derby ,  Ajay Dholakia ,  Michelle Chan Granholm ,  Dongming Hwang ,  Fredy D. Neeser ,  Robert John Schule ,  Malcolm Scott Ware ,  Hua Ye ,  Charles Robert Young

IPC分类号： H04B138

CPC分类号： G06F11/3485 ,  H04M11/066 ,  H04W24/00 ,  H04W48/16 ,  H04W76/10

摘要： Methods, systems and computer program products are provided for monitoring performance of a modem which obtain diagnostic data directly from memory associated with the modem's digital signal processor (DSP). A secondary path to the DSP memory is utilized for the monitoring operations so that real time data can be obtained during connection startup procedures and during an active connection. First-in first-out (FIFO) buffers are incorporated in the DSP memory to track state transitions of one or more of the state machines within the modem and various performance data measurements may be obtained directly from the DSP memory responsive to different state transition events. The real time collected data may be stored in a file and provided to a remote location for use in diagnosing customer problems with specific customer line connections. Accordingly, real time monitoring of digital and analog line conditions and modem performance may be utilized to diagnose problems with modems and line connections.

摘要翻译： 提供了方法，系统和计算机程序产品，用于监视直接从与调制解调器的数字信号处理器（DSP）相关联的存储器获取诊断数据的调制解调器的性能。 利用DSP存储器的辅助路径进行监视操作，以便在连接启动过程期间和在主动连接期间可以获得实时数据。 先进先出（FIFO）缓冲器被并入DSP存储器中以跟踪调制解调器内的一个或多个状态机的状态转换，并且可以响应于不同的状态转换事件从DSP存储器直接获得各种性能数据测量 。 实时收集的数据可以存储在文件中并提供给远程位置以用于诊断具有特定客户线路连接的客户问题。 因此，可以利用数字和模拟线路条件和调制解调器性能的实时监测来诊断调制解调器和线路连接的问题。

公开(公告)号：US06643815B1

公开(公告)日：2003-11-04

申请号：US09538204

申请日：2000-03-30

申请人： Gordon Taylor Davis ,  Malcolm Scott Ware ,  Charles Robert Young

发明人： Gordon Taylor Davis ,  Malcolm Scott Ware ,  Charles Robert Young

IPC分类号： G06F1100

CPC分类号： H04L69/04 ,  H04L1/0057 ,  H04L1/1607

摘要： Re-synchronization of sets of transmit and receive state variables in a communication system is achieved when an error is detected, without disrupting the connection. Each of first and second transceivers, connected by a communications channel, have a common set of transmit and receive state variables supporting a data encoding algorithm function. The transmitter of one of the first and second transceivers fist encodes data to be transmitted and updates the transmit state variables according to the data encoding algorithm and the receiver of the receiving transceiver validates whether or not each data block has been received correctly. During the process of decoding the data, the receive state variables are updated according to the same algorithm used to update the transmit state variables, thereby keeping the two sets of state variables in synchronism with each other. When an error is detected, re-synchronization occurs by switching to transparent mode in the direction of communication in which the error occurred and resetting the corresponding transmit and receive sets of state variables.

摘要翻译： 当检测到错误而不中断连接时，可以实现通信系统中发送和接收状态变量集合的重新同步。 通过通信信道连接的第一和第二收发机中的每一个具有支持数据编码算法功能的公共发送和接收状态变量集合。 第一和第二收发器之一的发射机对要发射的数据进行编码，并根据数据编码算法对发射状态变量进行更新，并且接收收发器的接收机验证每个数据块是否已被正确接收。 在解码数据的过程中，根据用于更新发送状态变量的相同算法更新接收状态变量，从而使两组状态变量保持同步。 当检测到错误时，通过在发生错误的通信方向切换到透明模式并重置相应的发送和接收状态变量集合来进行重新同步。

公开(公告)号：US06581183B1

公开(公告)日：2003-06-17

申请号：US09539105

申请日：2000-03-30

申请人： Gordon Taylor Davis ,  Malcolm Scott Ware ,  Charles Robert Young

发明人： Gordon Taylor Davis ,  Malcolm Scott Ware ,  Charles Robert Young

IPC分类号： H03M730

CPC分类号： H04L1/0061 ,  H03M7/3088 ,  H04L1/16

摘要： Broadband modems using data compression insure the physical connection between modems is solid prior to initiating error recovery procedures since its error detection runs on the compressed data. Escape sequences applicable to Transparent Mode of the Compression function enable both duplex and simplex compression functions and provide a more reliable mechanism for completion of error recovery procedures in the presence of subsequent line disturbances. Transparent Mode is used during the re-synchronization procedure. No special compression code words are required to accomplish the procedure, and there is no reduction in the number of code words available for actual compression encoding. The procedure works regardless of whether compression is being used in both directions, only one direction, or neither direction. A new Transparent Mode Command to request that the remote modem send a RESET Command is defined. The new command is termed RRESET.

摘要翻译： 使用数据压缩的宽带调制解调器确保调制解调器之间的物理连接在启动错误恢复过程之前是坚实的，因为其在压缩数据上运行错误检测。 适用于压缩功能的透明模式的转义序列支持双工和单工压缩功能，并提供更可靠的机制，用于在存在随后的线路干扰的情况下完成错误恢复过程。 在重新同步过程中使用透明模式。 不需要特殊的压缩码字来完成该过程，并且没有减少可用于实际压缩编码的码字数量。 无论压缩方向是在两个方向上使用还是在一个方向上，或者两个方向无关，程序都可以工作。 定义了一个新的透明模式命令，要求远程调制解调器发送RESET命令。 新命令被称为RRESET。

公开(公告)号：US06826157B1

公开(公告)日：2004-11-30

申请号：US09431972

申请日：1999-10-29

申请人： Gordon Taylor Davis ,  Jeffrey Haskell Derby ,  Malcolm Scott Ware ,  Charles Robert Young

发明人： Gordon Taylor Davis ,  Jeffrey Haskell Derby ,  Malcolm Scott Ware ,  Charles Robert Young

IPC分类号： H04J116

CPC分类号： H04L1/0002

摘要： Data rate control systems, methods, and computer program products in which an error counter is maintained that contains an error count. The error counter is periodically sampled to determine a sampling interval error count corresponding to a change in the error count since a previous read of the error counter. The sampling interval error count is provided to a first filter that is characterized by a slow time-constant and a second filter that is characterized by a fast time-constant. The first filter generates a slow-filtered sampling interval error count while the second filter generates a fast-filtered sampling interval error count, which are used as a basis for generating a data rate slowdown request signal. More specifically, the data rate slowdown request signal is generated if either the slow-filtered sampling interval error count or the fast-filtered sampling interval error count exceeds a threshold respectively associated therewith. Advantageously, the first filter, which is characterized by a slow time-constant, may be used to respond to lower numbers of errors that are sustained over an extended time period while the second filter, which is characterized by a fast time-constant, may be used to respond to large error bursts spanning a shorter time period. Moreover, by filtering the errors accumulated during each sampling interval, sensitivity with respect to the position in time of a given error burst relative to boundaries between sampling intervals may be avoided.

摘要翻译： 数据速率控制系统，方法和计算机程序产品，其中维护包含错误计数的错误计数器。 周期性地对误差计数器进行采样，以确定与错误计数器的先前读取相对应的误差计数变化的采样间隔误差计数。 采样间隔误差计数被提供给以慢时间常数为特征的第一滤波器和以快速时间常数为特征的第二滤波器。 第一个滤波器产生慢速滤波的采样间隔误差计数，而第二个滤波器产生快速滤波的采样间隔误差计数，用于产生数据速率减速请求信号的基础。 更具体地，如果缓慢滤波的采样间隔误差计数或快速滤波的采样间隔误差计数超过分别与其相关联的阈值，则产生数据速率减速请求信号。 有利地，以慢时间常数为特征的第一滤波器可用于响应在较长时间段内持续的较低数量的误差，而以快速时间常数为特征的第二滤波器可以 用于响应跨越较短时间段的大错误突发。 此外，通过对在每个采样间隔期间累积的误差进行滤波，可以避免相对于采样间隔之间的边界相对于给定误差突发的时间位置的灵敏度。