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1. 发明授权

US07362714B2 Packet network monitoring device 有权
标题翻译：分组网监控设备
公开(公告)号：US07362714B2
公开(公告)日：2008-04-22
申请号：US10797984
申请日：2004-03-11
申请人： William M. Richardson , Leslie H. Swanson , Ashwin Kovummal , Sandeepan Mukherjee
发明人： William M. Richardson , Leslie H. Swanson , Ashwin Kovummal , Sandeepan Mukherjee
IPC分类号： G01R31/28
CPC分类号： H04L43/50 , H04L43/022 , H04L43/0847 , H04L43/12 , H04L43/16 , H04L43/18
摘要： A network diagnostic device is disclosed that digitally samples the voltages on the cabling of the network, but does so at a much higher rate and with greater resolution then is required to minimally detect digital transmissions on the cabling. This sampling provides information on the analog characteristics of digital, noise, and interference signals on the network. Thus, network problems can be precisely diagnosed. The device includes a fast digitizer with a long memory and a system processor that statistically analyzes the signal events captured by the digitizer. The invention is also capable of performing time domain reflectometry (TDR) analysis of a functioning network. This is accomplished by placing a TDR signal on the network surrounded by a transmission that the network devices will interpret as a broadcast diagnostic packet. This will cause the network nodes to ignore the transmission. The digitizer, however, is able to detect the networks response to the TDR signal. Methods for identifying unknown network sources and Manchester decoding are also disclosed.
摘要翻译：公开了一种网络诊断装置，其数字地采样网络布线上的电压，但以更高的速率进行这样的测试，并且需要更高的分辨率来最小化地检测电缆上的数字传输。该采样提供有关网络上数字，噪声和干扰信号的模拟特性的信息。因此，可以精确诊断网络问题。该设备包括具有长存储器的快速数字转换器和统计分析数字转换器捕获的信号事件的系统处理器。本发明还能够对功能性网络进行时域反射（TDR）分析。这是通过将TDR信号放置在由网络设备围绕的网络上来实现的，网络设备将被解释为广播诊断分组。这将导致网络节点忽略传输。然而，数字化仪能够检测网络对TDR信号的响应。还公开了用于识别未知网络源和曼彻斯特解码的方法。

2. 发明授权

US06795402B1 Packet network monitoring device 有权
标题翻译：分组网监控设备
公开(公告)号：US06795402B1
公开(公告)日：2004-09-21
申请号：US09429458
申请日：1999-10-28
申请人： William M. Richardson , Leslie H. Swanson , Ashwin Kovummal , Sandeepan Mukherjee
发明人： William M. Richardson , Leslie H. Swanson , Ashwin Kovummal , Sandeepan Mukherjee
IPC分类号： H04L1226
CPC分类号： H04L43/50 , H04L43/022 , H04L43/0847 , H04L43/12 , H04L43/16 , H04L43/18
摘要： A network diagnostic device is disclosed that digitally samples the voltages on the cabling of the network, but does so at a much higher rate and with greater resolution then is required to minimally detect digital transmissions on the cabling. This sampling provides information on the analog characteristics of digital, noise, and interference signals on the network. Thus, network problems can be precisely diagnosed. The device includes a fast digitizer with a long memory and a system processor that statistically analyzes the signal events captured by the digitizer. The invention is also capable of performing time domain reflectometry (TDR) analysis of a functioning network. This is accomplished by placing a TDR signal on the network surrounded by a transmission that the network devices will interpret as a broadcast diagnostic packet. This will cause the network nodes to ignore the transmission. The digitizer, however, is able to detect the networks response to the TDR signal. Methods for identifying unknown network sources and Manchester decoding are also disclosed.
摘要翻译：公开了一种网络诊断装置，其数字地采样网络布线上的电压，但以更高的速率进行这样的测试，并且需要更高的分辨率来最小化地检测电缆上的数字传输。该采样提供有关网络上数字，噪声和干扰信号的模拟特性的信息。因此，可以精确诊断网络问题。该设备包括具有长存储器的快速数字转换器和统计分析数字转换器捕获的信号事件的系统处理器。本发明还能够对功能性网络进行时域反射（TDR）分析。这是通过将TDR信号放置在由网络设备围绕的网络上来实现的，网络设备将被解释为广播诊断分组。这将导致网络节点忽略传输。然而，数字化仪能够检测网络对TDR信号的响应。还公开了用于识别未知网络源和曼彻斯特解码的方法。

3. 发明申请

US20050058076A1 Packet network monitoring device 有权
标题翻译：分组网监控设备
公开(公告)号：US20050058076A1
公开(公告)日：2005-03-17
申请号：US10797984
申请日：2004-03-11
申请人： William Richardson , Leslie Swanson , Ashwin Kovummal , Sandeepan Mukherjee
发明人： William Richardson , Leslie Swanson , Ashwin Kovummal , Sandeepan Mukherjee
IPC分类号： H04L12/26
CPC分类号： H04L43/50 , H04L43/022 , H04L43/0847 , H04L43/12 , H04L43/16 , H04L43/18
摘要： A network diagnostic device is disclosed that digitally samples the voltages on the cabling of the network, but does so at a much higher rate and with greater resolution then is required to minimally detect digital transmissions on the cabling. This sampling provides information on the analog characteristics of digital, noise, and interference signals on the network. Thus, network problems can be precisely diagnosed. The device includes a fast digitizer with a long memory and a system processor that statistically analyzes the signal events captured by the digitizer. The invention is also capable of performing time domain reflectometry (TDR) analysis of a functioning network. This is accomplished by placing a TDR signal on the network surrounded by a transmission that the network devices will interpret as a broadcast diagnostic packet. This will cause the network nodes to ignore the transmission. The digitizer, however, is able to detect the networks response to the TDR signal. Methods for identifying unknown network sources and Manchester decoding are also disclosed.
摘要翻译：公开了一种网络诊断装置，其数字地采样网络布线上的电压，但以更高的速率进行这样的测试，并且需要更高的分辨率来最小化地检测电缆上的数字传输。该采样提供有关网络上数字，噪声和干扰信号的模拟特性的信息。因此，可以精确诊断网络问题。该设备包括具有长存储器的快速数字转换器和统计分析数字转换器捕获的信号事件的系统处理器。本发明还能够对功能性网络进行时域反射（TDR）分析。这是通过将TDR信号放置在由网络设备围绕的网络上来实现的，网络设备将被解释为广播诊断分组。这将导致网络节点忽略传输。然而，数字化仪能够检测网络对TDR信号的响应。还公开了用于识别未知网络源和曼彻斯特解码的方法。

4. 发明授权

US07652982B1 Providing high availability network services 有权
标题翻译：提供高可用性网络服务
公开(公告)号：US07652982B1
公开(公告)日：2010-01-26
申请号：US11280925
申请日：2005-11-16
申请人： Ashwin Kovummal
发明人： Ashwin Kovummal
IPC分类号： G01R31/08 , G06F11/00
CPC分类号： G06F11/1438 , G06F11/2005 , H04L41/0672 , H04L49/552
摘要： The principles of the invention allow a network device, such as a router, to maintain a high level of services during a failure without substantially utilizing redundant hardware components. During execution, the network device stores a subset of state information associated with applications executing on the network device. In the event of a failure, the network device reconstructs data structures associated with at least one of the applications based on the stored subset of state information. Next, the network device restarts at least one of the applications to resolve the failure. While restarting, the network device may continue to receive and forward information, such as packets, and, therefore, may continue to provide a high level of access to client devices previously connected to the network device. Thus, because the network device need not transfer control to a redundant hardware component, the network device may provide high availability without utilizing redundant hardware components, thereby potentially reducing the cost of high-availability routers.
摘要翻译：本发明的原理允许诸如路由器的网络设备在故障期间维持高水平的服务而不必基本上利用冗余的硬件组件。在执行期间，网络设备存储与在网络设备上执行的应用相关联的状态信息的子集。在发生故障的情况下，网络设备基于所存储的状态信息子集重建与至少一个应用相关联的数据结构。接下来，网络设备重新启动至少一个应用程序来解决故障。在重新启动时，网络设备可以继续接收和转发诸如分组的信息，并且因此可以继续提供对先前连接到网络设备的客户端设备的高级访问。因此，由于网络设备不需要将控制传输到冗余硬件组件，所以网络设备可以提供高可用性而不用冗余的硬件组件，从而潜在地降低高可用性路由器的成本。

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