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1.发明授权Fast and reliable data carrier detection by a cable modem in a cable television plant 有权通过有线电视机中的电缆调制解调器快速可靠的数据载体检测公开(公告)号：US07469414B1
公开(公告)日：2008-12-23
申请号：US10406866
申请日：2003-04-04
CPC分类号： H04L27/0012 , H04N5/4401 , H04N5/46 , H04N5/50 , H04N7/17309 , H04N21/42676 , H04N21/4382 , H04N21/4384 , H04N21/6118
摘要： Apparatus, methods, and computer program products for detecting or locating a viable data carrier in a downstream channel by a cable modem. Potential channels for data carriers can be eliminated quickly by going through a “screening” process, i.e., the first constellation diagram match, thereby preventing those potential channels from going through a significantly more time-consuming second constellation match. The determination of whether the signal in the potential channel is modulated according to the first particular modulation scheme is done rapidly and only potential channels containing a signal likely to be modulated according to the second particular modulation scheme are examined for the second determination step.
摘要翻译： 用于通过电缆调制解调器检测或定位下行信道中的可行数据载体的装置，方法和计算机程序产品。 可以通过进行“筛选”过程即第一星座图匹配来快速消除数据载体的潜在信道，从而防止这些潜在信道经历显着更耗时的第二星座匹配。 根据第一特定调制方案调制潜在信道中的信号是否被确定，并且仅在第二确定步骤中检查仅包含根据第二特定调制方案可能被调制的信号的潜在信道的潜在信道。
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2.发明授权Fast and reliable data carrier detection by a cable modem in a cable television plant 有权通过有线电视机中的电缆调制解调器快速可靠的数据载体检测公开(公告)号：US06574796B1
公开(公告)日：2003-06-03
申请号：US09227990
申请日：1999-01-08
IPC分类号： H04N7173
CPC分类号： H04L27/0012 , H04N5/4401 , H04N5/46 , H04N5/50 , H04N7/17309 , H04N21/42676 , H04N21/4382 , H04N21/4384 , H04N21/6118
摘要： Apparatus, methods, and computer program products are disclosed for detecting or locating a viable data carrier in a downstream channel by a cable modem. When a cable modem is first installed by a cable operator or powered up by a user, it must first locate or tune in to the correct downstream channel in order to receive data from the headend of the cable plant. This time-consuming process can be shortened by performing two matches between the selected, potential downstream data carrier and constellation diagrams of certain modulation schemes. Through this method, potential channels for data carriers can be eliminated quickly by going through a “screening” process (the first constellation diagram match) thereby preventing those potential channels from going through a significantly more time-consuming second constellation match. The process begins with selecting a potential frequency channel from the downstream band. It is then determined whether the potential channel contains a signal modulated in a particular modulation scheme where the modulation scheme is one not normally used on signals in the downstream channel, such as QPSK. If the signal in the potential frequency channel is not modulated according to the particular modulation scheme, the cable modem determines whether the signal in the potential channel is modulated according to another particular modulation scheme, such as QAM64 or QAM256. These particular modulation schemes, however, are ones normally used on signals in the downstream channel. The determination of whether the signal in the potential channel is modulated according to the first particular modulation scheme is done rapidly and only potential channels containing a signal likely to be modulated according to the second particular modulation scheme are examined for the second determination step.
摘要翻译： 公开了用于通过电缆调制解调器检测或定位下行信道中的可行数据载体的装置，方法和计算机程序产品。 当电缆调制解调器首先由电缆操作员安装或由用户加电时，它必须首先定位或调入正确的下游通道，以从电缆设备的前端接收数据。 可以通过在所选择的潜在下游数据载体和某些调制方案的星座图之间执行两个匹配来缩短这个耗时的过程。 通过这种方法，可以通过“筛选”过程（第一个星座图匹配）来快速消除数据载体的潜在信道，从而防止这些潜在信道经历显着更耗时的第二星座匹配。 该过程开始于从下游频带选择潜在的频道。 然后确定潜在信道是否包含在特定调制方案中调制的信号，其中调制方案是在下行信道中的信号（例如QPSK）上通常不使用的信号。 如果根据特定的调制方案没有调制潜在频道中的信号，则电缆调制解调器根据另一特定的调制方案（例如QAM64或QAM256）来确定是否调制潜在信道中的信号。 然而，这些特定的调制方案是通常用于下行信道中的信号的方案。 根据第一特定调制方案调制潜在信道中的信号是否被确定，并且仅在第二确定步骤中检查仅包含根据第二特定调制方案可能被调制的信号的潜在信道的潜在信道。
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3.发明授权Echo device method for locating upstream ingress noise gaps at cable television head ends 有权用于定位有线电视头端的上游入口噪声间隙的回波设备方法
公开(公告)号：US6032019A
公开(公告)日：2000-02-29
申请号：US234775
申请日：1999-01-20
申请人： Wei-Sing Chen , Guenter E. Roeck
发明人： Wei-Sing Chen , Guenter E. Roeck
IPC分类号： H04B3/38 , H04H20/78 , H04L12/26 , H04L12/28 , H04N5/21 , H04N7/14 , H04N7/173 , H04N17/00 , H04H1/02
CPC分类号： H04N17/00 , H04B3/38 , H04H20/12 , H04L12/2697 , H04L12/2801 , H04L43/50 , H04N7/14 , H04N7/17309 , H04H20/78 , H04N5/21
摘要： A system and method for locating ingress noise gaps for an upstream data carrier in a cable network utilizing cable modems is described. A system for identifying a transmission frequency that has less noise than other available frequency bands includes a packet generator, a rate controller, an echo device, a demodulator, and a packet checker. The packet generator and rate controller, contained in a cable modem termination system, send test data downstream to the echo device which then redirects the test data upstream at a selected test frequency. The echo device, which may be located within the cable modem termination system or outside the termination system, listens on the downstream path for data packets addressed to it. Once received, the echo changes the address of the test data to the address of the packet checker. The packet checker then receives and analyzes the test data packet sent from the echo device to assess the amount of noise on that particular test frequency. The echo device can be a subscriber cable data modem configured to receive test packets sent downstream or a custom-built device located anywhere on the downstream path or within the cable modem termination system.
摘要翻译： 描述了利用电缆调制解调器在有线网络中为上行数据载体定位入口噪声间隙的系统和方法。 用于识别具有比其它可用频带更小的噪声的传输频率的系统包括分组生成器，速率控制器，回波设备，解调器和分组检查器。 包含在电缆调制解调器终端系统中的分组生成器和速率控制器将下行的测试数据发送到回波设备，然后在所选择的测试频率上将测试数据重定向到上游。 可以位于电缆调制解调器终端系统内或终端系统外部的回波设备在下行路径上侦听寻址到其的数据分组。 一旦接收到，回波将测试数据的地址更改为分组检查器的地址。 分组检查器然后接收并分析从回波设备发送的测试数据分组，以评估该特定测试频率上的噪声量。 回波设备可以是被配置为接收下游发送的测试分组的用户电缆数据调制解调器或位于下游路径上或电缆调制解调器终端系统内的任何地方的定制设备。
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4.发明授权Echo device method for locating upstream ingress noise gaps at cable television head ends 失效用于定位有线电视头端的上游入口噪声间隙的回波设备方法
公开(公告)号：US5943604A
公开(公告)日：1999-08-24
申请号：US962231
申请日：1997-10-31
申请人： Wei-Sing Chen , Guenter E. Roeck
发明人： Wei-Sing Chen , Guenter E. Roeck
IPC分类号： H04B3/38 , H04H20/78 , H04L12/26 , H04L12/28 , H04N5/21 , H04N7/14 , H04N7/173 , H04N17/00 , H04H1/02
CPC分类号： H04N17/00 , H04B3/38 , H04H20/12 , H04L12/2697 , H04L12/2801 , H04L43/50 , H04N7/14 , H04N7/17309 , H04H20/78 , H04N5/21
摘要： A system and method for locating ingress noise gaps for an upstream data carrier in a cable network utilizing cable modems is described. A system for identifying a transmission frequency that has less noise than other available frequency bands includes a packet generator, a rate controller, an echo device, a demodulator, and a packet checker. The packet generator and rate controller, contained in a cable modem termination system, send test data downstream to the echo device which then redirects the test data upstream at a selected test frequency. The echo device, which may be located within the cable modem termination system or outside the termination system, listens on the downstream path for data packets addressed to it. Once received, the echo changes the address of the test data to the address of the packet checker. The packet checker then recieves and analyzes the test data packet sent from the echo device to assess the amount of noise on that particular test frequency. The echo device can be a subscriber cable data modem configured to receive test packets sent downstream or a custom-built device located anywhere on the downstream path or within the cable modem termination system.
摘要翻译： 描述了利用电缆调制解调器在有线网络中为上行数据载体定位入口噪声间隙的系统和方法。 用于识别具有比其它可用频带更小的噪声的传输频率的系统包括分组生成器，速率控制器，回波设备，解调器和分组检查器。 包含在电缆调制解调器终端系统中的分组生成器和速率控制器将下行的测试数据发送到回波设备，然后在所选择的测试频率上将测试数据重定向到上游。 可以位于电缆调制解调器终端系统内或终端系统外部的回波设备在下行路径上侦听寻址到其的数据分组。 一旦接收到，回波将测试数据的地址更改为分组检查器的地址。 分组检查器然后接收并分析从回波设备发送的测试数据分组，以评估特定测试频率上的噪声量。 回波设备可以是被配置为接收下游发送的测试分组的用户电缆数据调制解调器或位于下游路径上或电缆调制解调器终端系统内的任何地方的定制设备。
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5.发明授权公开(公告)号：US07227889B1
公开(公告)日：2007-06-05
申请号：US10422613
申请日：2003-04-24
申请人： Guenter E. Roeck , Wei-Sing Chen , Sunil Khaunte , Mark E. Millet
发明人： Guenter E. Roeck , Wei-Sing Chen , Sunil Khaunte , Mark E. Millet
IPC分类号： H04B1/38
CPC分类号： H04L12/66 , H04L41/0213 , H04L41/0681 , H04L43/045 , H04L43/065 , H04L43/0817 , H04L43/10 , H04N7/17309 , H04N21/2402 , H04N21/42676 , H04N21/4424 , H04N21/6583
摘要： Methods, apparatus, and computer-readable media are disclosed for performing diagnostic tests of a communication link between a headend and a cable modem without having to assign an IP address to the cable modem. The diagnostic tests are performed at the MAC layer and test the state of the hardware between and including the cable modem termination system (CMTS) and a selected cable modem. By doing so, a network operator is able to more easily focus in on a potential problem in cable RF/MAC connectivity between the two components by first eliminating (or identifying) a problem with hardware before focusing on problem-solving at the software level, typically at the Network layer, at which point the cable modem is assigned an IP address.
摘要翻译： 公开了用于执行前端和电缆调制解调器之间的通信链路的诊断测试的方法，装置和计算机可读介质，而不必为电缆调制解调器分配IP地址。 诊断测试在MAC层执行，并测试电缆调制解调器终端系统（CMTS）和所选电缆调制解调器之间的硬件状态。 通过这样做，网络运营商能够更加轻松地集中在两个组件之间的有线RF / MAC连接的潜在问题上，首先在着重于软件层面的问题解决之前消除（或识别）硬件问题， 通常在网络层，电缆调制解调器在此时被分配一个IP地址。
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6.发明授权公开(公告)号：US06594305B1
公开(公告)日：2003-07-15
申请号：US09339067
申请日：1999-06-23
申请人： Guenter E. Roeck , Wei-Sing Chen , Sunil Khaunte , Mark E. Millet
发明人： Guenter E. Roeck , Wei-Sing Chen , Sunil Khaunte , Mark E. Millet
IPC分类号： H04B138
CPC分类号： H04L12/66 , H04L41/0213 , H04L41/0681 , H04L43/045 , H04L43/065 , H04L43/0817 , H04L43/10 , H04N7/17309 , H04N21/2402 , H04N21/42676 , H04N21/4424 , H04N21/6583
摘要： Methods, apparatus, and computer-readable media are disclosed for performing diagnostic tests of a communication link between a headend and a cable modem without having to assign an IP address to the cable modem. The diagnostic tests are performed at the MAC layer and test the state of the hardware between and including the cable modem termination system (CMTS) and a selected cable modem. By doing so, a network operator is able to more easily focus in on a potential problem in cable RF/MAC connectivity between the two components by first eliminating (or identifying) a problem with hardware before focusing on problem-solving at the software level, typically at the Network layer, at which point the cable modem is assigned an IP address. A network command is received from a network operator causing the CMTS to place a service identifier corresponding to a cable modem in possible need of diagnosing into a poll list. The service identifier is placed in the poll list the number of times specified in the network command as the number of polls desired for the test. This causes the cable modem to receive a map message with a station maintenance time slot for itself from the CMTS the specified number of times. Periodic ranging is performed between the CMTS and the cable modem associated with the service identifier. If it is determined that the service identifier is in the poll list as a result of the network command, results are then evaluated from the periodic ranging and reported to the network operator as a DOCSIS ping success/failure. It is then determined whether the cable modem should remain on the poll list based on results from the periodic ranging.
摘要翻译： 公开了用于执行前端和电缆调制解调器之间的通信链路的诊断测试的方法，装置和计算机可读介质，而不必为电缆调制解调器分配IP地址。 诊断测试在MAC层执行，并测试电缆调制解调器终端系统（CMTS）和所选电缆调制解调器之间的硬件状态。 通过这样做，网络运营商能够更加轻松地集中在两个组件之间的有线RF / MAC连接的潜在问题上，首先在着重于软件层面的问题解决之前消除（或识别）硬件问题， 通常在网络层，电缆调制解调器在此时被分配一个IP地址。 从网络运营商接收到网络命令，导致CMTS将可能需要诊断的电缆调制解调器的服务标识符放置在轮询列表中。 将服务标识符作为测试所需的轮询数量放在轮询列表中指定的网络命令中的次数。 这使得电缆调制解调器从指定次数的CMTS接收到具有自身的站维护时隙的地图消息。 在CMTS和与服务标识符相关联的电缆调制解调器之间执行周期性测距。 如果由于网络命令确定服务标识符在轮询列表中，则结果将从周期范围进行评估，并作为DOCSIS ping成功/失败报告给网络运营商。 然后根据周期性测距的结果确定电缆调制解调器是否应保留在轮询列表上。
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公开(公告)号：US07966409B1
公开(公告)日：2011-06-21
申请号：US10899668
申请日：2004-07-26
IPC分类号： G06F15/16
CPC分类号： H04L45/28 , H04L12/2801 , H04L45/00 , H04L45/22 , H04L45/586 , H04M3/08 , H04N7/17309 , H04N21/2404 , H04N21/4788 , H04N21/6118 , H04N21/6168 , H04N21/6402 , H04N21/64322
摘要： A protection CMTS is available to immediately service a cable modem should that modem's service from a working CMTS fail for any reason. To speed the service transfer (cutover) from the working CMTS to the protection CMTS, the cable modem may preregister with the protection CMTS well before the cutover becomes necessary. The cable modem's registration with both the working CMTS and the protection CMTS preferably employs a single IP address, so that the cable modem need not obtain a new IP address during cutover. While the cable modem may register with both the working CMTS and the protection CMTS, the devices are designed or configured so that only the working CMTS injects a host route for the cable modem into the appropriate routing protocol. Only after cutover to the protection CMTS does the protection CMTS inject its host route.
摘要翻译： 如果调制解调器从工作CMTS的服务由于任何原因而失败，则保护CMTS可用于立即服务有线调制解调器。 为了加速从工作CMTS到保护CMTS的业务传输（切换），电缆调制解调器可以在割接变得必要之前预先注册保护CMTS。 电缆调制解调器与工作CMTS和保护CMTS的注册优选地采用单个IP地址，使得电缆调制解调器在切换期间不需要获得新的IP地址。 当电缆调制解调器可以向工作CMTS和保护CMTS两者注册时，设备被设计或配置为使得只有工作CMTS将电缆调制解调器的主机路由注入适当的路由协议。 只有在切换到保护CMTS之后，保护CMTS才会注入其主机路由。
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公开(公告)号：US06839829B1
公开(公告)日：2005-01-04
申请号：US09484189
申请日：2000-01-18
IPC分类号： H04L12/28 , H04L12/56 , H04N7/173 , G06F15/177 , G06F11/273 , G06F15/173
CPC分类号： H04L45/28 , H04L12/2801 , H04L45/00 , H04L45/22 , H04L45/586 , H04M3/08 , H04N7/17309 , H04N21/2404 , H04N21/4788 , H04N21/6118 , H04N21/6168 , H04N21/6402 , H04N21/64322
摘要： A protection CMTS is available to immediately service a cable modem should that modem's service from a working CMTS fail for any reason. To speed the service transfer (cutover) from the working CMTS to the protection CMTS, the cable modem may preregister with the protection CMTS well before the cutover becomes necessary. The cable modem's registration with both the working CMTS and the protection CMTS preferably employs a single IP address, so that the cable modem need not obtain a new IP address during cutover. While the cable modem may register with both the working CMTS and the protection CMTS, the devices are designed or configured so that only the working CMTS injects a host route for the cable modem into the appropriate routing protocol. Only after cutover to the protection CMTS does the protection CMTS inject its host route.
摘要翻译： 如果调制解调器从工作CMTS的服务由于任何原因而失败，则保护CMTS可用于立即服务有线调制解调器。 为了加速从工作CMTS到保护CMTS的业务传输（切换），电缆调制解调器可以在割接变得必要之前预先注册保护CMTS。 电缆调制解调器与工作CMTS和保护CMTS的注册优选地采用单个IP地址，使得电缆调制解调器在切换期间不需要获得新的IP地址。 当电缆调制解调器可以向工作CMTS和保护CMTS两者注册时，设备被设计或配置为使得只有工作CMTS将电缆调制解调器的主机路由注入适当的路由协议。 只有在切换到保护CMTS之后，保护CMTS才会注入其主机路由。
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公开(公告)号：US07058007B1
公开(公告)日：2006-06-06
申请号：US09484611
申请日：2000-01-18
CPC分类号： H04L45/00 , G06F11/2005 , H04L45/22 , H04L45/28
摘要： A protection CMTS is available to immediately service a cable modem should that modem's service from a working CMTS fail for any reason. To speed the service transfer (cutover) from the working CMTS to the protection CMTS, the cable modem may preregister with the protection CMTS well before the cutover becomes necessary. The cable modem's registration with both the working CMTS and the protection CMTS preferably employs a single IP address, so that the cable modem need not obtain a new IP address during cutover. While the cable modem may register with both the working CMTS and the protection CMTS, the devices are designed or configured so that only the working CMTS injects a host route for the cable modem into the appropriate routing protocol. Only after cutover to the protection CMTS does the protection CMTS inject its host route.
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公开(公告)号：US07930684B2
公开(公告)日：2011-04-19
申请号：US11248881
申请日：2005-10-12
申请人： Guenter E. Roeck , Serge Pashenkov , Serge Shats
发明人： Guenter E. Roeck , Serge Pashenkov , Serge Shats
CPC分类号： G06F11/2046 , G06F11/1471 , G06F11/2028
摘要： A system, method, and computer-accessible medium for logging and replaying asynchronous events are disclosed. One or more asynchronous events occurring during execution of a first instance of a computer program are logged. In logging the asynchronous events, a respective location in the execution of the first instance at which each of the one or more asynchronous events occurs is determined. A respective synchronous event preceding each asynchronous event is also determined. The asynchronous events are replayed during execution of a second instance of the computer program. In replaying each asynchronous event, the second instance is instrumented at the respective location during the execution of the second instance after detecting the preceding synchronous event.
摘要翻译： 公开了用于记录和重放异步事件的系统，方法和计算机可访问介质。 记录在执行计算机程序的第一实例期间发生的一个或多个异步事件。 在记录异步事件时，确定执行一个或多个异步事件中的每一个发生的第一实例的相应位置。 每个异步事件之前的相应的同步事件也被确定。 在执行计算机程序的第二个实例期间重播异步事件。 在重播每个异步事件时，在检测到先前的同步事件之后，第二个实例在执行第二个实例期间被检测在相应的位置。
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