公开(公告)号：US07246368B1

公开(公告)日：2007-07-17

申请号：US09493405

申请日：2000-01-28

申请人： Mark E. Millet ,  Guenter E. Roeck ,  Chrisanto Leano ,  James A. Clark

发明人： Mark E. Millet ,  Guenter E. Roeck ,  Chrisanto Leano ,  James A. Clark

IPC分类号： H04N7/16

CPC分类号： H04L43/50

摘要： A system for testing a cable network during normal operation interleaves test signals with live data traffic. Installed cable modems are used to generate the test signals. During live communication, such modems send upstream data at allotted time periods. Periodically, there are time slots when no modem is transmitting on the network. During these times, specific modems may be directed to transmit specific test signals. A controller such as a cable modem termination system directs specific modems to transmit signals at defined frequencies and powers during specific time slots. In this manner, the system can monitor the frequency response of the cable network at various locations, and thereby determine “on-the-fly” when maintenance or modification is required.

摘要翻译： 用于在正常操作期间测试有线网络的系统用实时数据流量交织测试信号。 安装的电缆调制解调器用于产生测试信号。 在实时通信中，这种调制解调器在分配的时间段发送上行数据。 周期性地，当网络上没有调制解调器正在发送时，有时隙。 在这些时间期间，特定的调制解调器可以被引导以发送特定的测试信号。 诸如电缆调制解调器终端系统的控制器引导特定调制解调器在特定时隙期间以定义的频率和功率发送信号。 以这种方式，系统可以监视各个位置处的电缆网络的频率响应，从而在需要维护或修改时确定“即时”。

公开(公告)号：US07068712B1

公开(公告)日：2006-06-27

申请号：US09484612

申请日：2000-01-18

申请人： Joanna Qun Zang ,  Feisal Daruwalla ,  James R. Forster ,  Guenter E. Roeck ,  Joseph O'Donnell ,  John Chen ,  Mark Millet

发明人： Joanna Qun Zang ,  Feisal Daruwalla ,  James R. Forster ,  Guenter E. Roeck ,  Joseph O'Donnell ,  John Chen ,  Mark Millet

IPC分类号： H04B1/38

CPC分类号： G06F11/2005 ,  H04L29/12009 ,  H04L61/00 ,  H04N7/173 ,  H04N21/64738

摘要： A CMTS redundancy technique requires at least two CMTS interfaces (e.g., line cards) on one or more CMTS chassis at the head end of a cable network. One of the CMTSs serves as a backup or “protecting” CMTS. When another CMTS (a “working” CMTS) becomes unavailable to service its group of cable modems, the protecting CMTS takes over service to those cable modems. The SWITCHOVER takes place transparently (or nearly transparently) to the cable modems. The protecting CMTS provides service on the same downstream channel as used by the working CMTS. The cable modems need not modify any settings pursuant to their cable modem communication protocol (e.g., DOCSIS ranging). This transparency to the cable modems is realized by keeping the working and protecting CMTSs in synchronization regarding service parameters for the cable modems. In other words, the protecting CMTS maintains a list of current parameters for allowing service to the cable modems.

摘要翻译： CMTS冗余技术在电缆网络的头端的一个或多个CMTS机架上需要至少两个CMTS接口（例如，线路卡）。 其中一个CMTS作为备份或“保护”CMTS。 当另一个CMTS（“工作”CMTS）变得不可用来为其组的电缆调制解调器服务时，保护CMTS将接管这些电缆调制解调器的服务。 SWITCHOVER透明地（或几乎透明地）发送到电缆调制解调器。 保护CMTS在工作CMTS使用的同一下行信道上提供服务。 电缆调制解调器不需要根据其电缆调制解调器通信协议（例如，DOCSIS测距）来修改任何设置。 电缆调制解调器的透明度通过保持工作和保护CMTS与电缆调制解调器的服务参数同步而实现。 换句话说，保护CMTS维护用于允许对电缆调制解调器的服务的当前参数的列表。

公开(公告)号：US06691250B1

公开(公告)日：2004-02-10

申请号：US09607108

申请日：2000-06-29

申请人： Anil K. Chandiramani ,  Guenter E. Roeck

发明人： Anil K. Chandiramani ,  Guenter E. Roeck

IPC分类号： G06F1100

CPC分类号： G06F11/079 ,  G06F11/0706 ,  G06F11/0793

摘要： Methods, apparatus, and computer program products are disclosed for analyzing and recovering from severe to catastrophic faults in a computer system. When a fault that cannot be handled by the computer system's normal fault handling processes, a shadow mode created by a fault handling virtual machine is invoked. The fault handling virtual machine executes only when the normally nonrecoverable fault is encountered and executes as a triangulated or shadow mode on the system. Once shadow mode is invoked, fault context data is collected on the system and used to analyze and recover from the fault. More specifically, one or more post-fault stable states are constructed by the fault handling virtual machine. These stable states are used to bring the computer system back to a normal operating state in which the component or action causing the initial nonrecoverable fault is avoided. Persistent faults may be encountered while the virtual machine is attempting to recover from the initial fault.

摘要翻译： 公开了用于在计算机系统中从严重到灾难性故障的分析和恢复的方法，装置和计算机程序产品。 当计算机系统的正常故障处理过程无法处理的故障时，调用由故障处理虚拟机创建的影子模式。 故障处理虚拟机仅在遇到正常不可恢复故障时执行，并在系统上作为三角测量或阴影模式执行。 一旦调用了阴影模式，系统收集故障上下文数据，并用于从故障中分析和恢复。 更具体地说，一个或多个故障后稳定状态由故障处理虚拟机构成。 这些稳定状态用于使计算机系统恢复到避免导致初始不可恢复故障的组件或动作的正常操作状态。 虚拟机试图从初始故障中恢复时可能会遇到持续的故障。

公开(公告)号：USRE44661E1

公开(公告)日：2013-12-24

申请号：US11636725

申请日：2006-12-06

申请人： Feisal Daruwalla ,  James R. Forster ,  Guenter E. Roeck ,  John T. Chapman ,  Joanna Qun Zang ,  Yong Lu

发明人： Feisal Daruwalla ,  James R. Forster ,  Guenter E. Roeck ,  John T. Chapman ,  Joanna Qun Zang ,  Yong Lu

IPC分类号： H04L12/26 ,  H04J1/16 ,  G06F11/00 ,  G08C15/00 ,  G01R31/08

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.

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。

公开(公告)号：US08117600B1

公开(公告)日：2012-02-14

申请号：US11321460

申请日：2005-12-29

申请人： Guenter E. Roeck ,  Serge Shats

发明人： Guenter E. Roeck ,  Serge Shats

IPC分类号： G06F9/44 ,  G06F9/45 ,  G06F11/00

CPC分类号： G06F11/3644 ,  G06F9/45525 ,  G06F11/3632

摘要： A system, method, and computer-accessible medium are disclosed for identifying in-line synchronization instructions in binary program code. One or more executable segments of the binary program code may be scanned to identify one or more potential in-line synchronization instructions. For each potential in-line synchronization instruction, it may be determined whether neighboring potential instructions are valid instructions. For each potential in-line synchronization instruction, it may be determined that the potential in-line synchronization instruction is a valid in-line synchronization instruction if the neighboring potential instructions are valid instructions.

摘要翻译： 公开了一种用于识别二进制程序代码中的在线同步指令的系统，方法和计算机可访问介质。 可以扫描二进制程序代码的一个或多个可执行段以识别一个或多个潜在的在线同步指令。 对于每个潜在的在线同步指令，可以确定相邻的电位指令是否是有效的指令。 对于每个潜在的在线同步指令，如果相邻电位指令是有效指令，则可以确定潜在的在线同步指令是有效的在线同步指令。

公开(公告)号：US07970000B2

公开(公告)日：2011-06-28

申请号：US11197685

申请日：2005-08-03

申请人： Guenter E. Roeck

发明人： Guenter E. Roeck

IPC分类号： H04L12/12

CPC分类号： H04L12/2801 ,  H04N21/6118

摘要： A network device communicates in a cable network. The network device has a port to allow the device to communicate on a cable network. The network device also has a processor to send a message indicating that the device is assuming a dormant state. The processor then assumes a dormant state for the device, releasing the service identifiers and service flows associated with that device for use in the cable network.

摘要翻译： 网络设备在有线网络中进行通信。 网络设备具有允许设备在有线网络上通信的端口。 网络设备还具有处理器来发送指示设备正在休眠状态的消息。 然后，处理器假设设备处于休眠状态，释放与该设备相关联的服务标识符和服务流以用于有线网络。

公开(公告)号：US07334252B1

公开(公告)日：2008-02-19

申请号：US09687297

申请日：2000-10-13

申请人： Mark Millet ,  Guenter E. Roeck

发明人： Mark Millet ,  Guenter E. Roeck

IPC分类号： H04N7/173 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04L12/2801 ,  H04L12/2856 ,  H04L12/2872 ,  H04L41/0213 ,  H04L41/0806 ,  H04L41/0816 ,  H04N21/42692 ,  H04N21/4432 ,  H04N21/6543

摘要： Methods, systems, and computer program products are disclosed for allowing rapid re-provisioning of a cable modem at the MAC/physical layer in a cable modem network. After a cable modem goes through power-up/self-test, i.e., a hard boot, and goes through initial provisioning, the modem is in a steady state in which standard DOCSIS periodic ranging is performed. It is during periodic ranging that the provisioning status, such as bit rate, ISP, etc., can be rapidly changed to allow for “on the fly” changes in provisioning. A cable modem is synchronized with the cable modem network. The modem is then provisioned once it receives a configuration file from a provisioning system. Periodic ranging is then performed between the modem and the CMTS, located either in a headend or a fiber node in the cable plant. The periodic ranging is interrupted by a command or action taken by the CMTS on the cable modem instead of the modem being affected directly by the provisioning system. Once periodic ranging is broken, either by cessation of polling messages or a ranging abort command, the modem goes directly to re-synchronizing with the cable network and re-provisions, i.e., avoids performing a power-on/self test or hard boot.

摘要翻译： 公开了方法，系统和计算机程序产品，用于允许电缆调制解调器在电缆调制解调器网络中的MAC /物理层处的快速重新供应。 在有线调制解调器通过上电/自检（即，硬启动）并且经过初始配置之后，调制解调器处于稳定状态，其中执行标准DOCSIS周期性测距。 在定期测距期间，诸如比特率，ISP等的供应状态可以被快速地改变以允许供应中的“即时”变化。 电缆调制解调器与电缆调制解调器网络同步。 一旦接收到配置系统的配置文件，调制解调器就被配置。 然后在调制解调器和位于电缆设备中的前端或光纤节点中的CMTS之间执行周期性测距。 周期性测距由CMTS在电缆调制解调器上采取的命令或动作中断，而不是调制解调器直接受到供应系统的影响。 一旦周期性测距被破坏，通过停止轮询消息或测距中止命令，调制解调器直接与有线网络重新同步并重新设置，即避免进行开机/自检或硬启动。

公开(公告)号：US06453472B1

公开(公告)日：2002-09-17

申请号：US09324358

申请日：1999-06-02

申请人： Chrisanto D. Leano ,  Guenter E. Roeck ,  Mark E. Millet

发明人： Chrisanto D. Leano ,  Guenter E. Roeck ,  Mark E. Millet

IPC分类号： H04N7173

CPC分类号： H04N7/17309 ,  H04L1/0001 ,  H04L5/023 ,  H04N21/42676

摘要： Disclosed are a method apparatus for performing periodic ranging with a cable modem. It is determined whether an actual power level of the cable modem requires adjustment to a desired power level and it is indicated to the cable modem that it should adjust the actual power level to an adjusted power level that differs from the actual power level of the cable modem by less than or equal to a first dynamic range associated with the cable modem. In one extension of this method, the first dynamic range represents a difference between a modem dynamic range of the actual power level output by the cable modem and a head end dynamic range for recognizing the actual power level output by the cable modem.

摘要翻译： 公开了一种用于利用电缆调制解调器执行周期性测距的方法装置。 确定电缆调制解调器的实际功率电平是否需要调整到期望功率电平，并且向电缆调制解调器指示其应该将实际功率电平调整到与电缆的实际功率电平不同的调整功率电平 调制解调器小于或等于与电缆调制解调器相关联的第一动态范围。 在该方法的一个扩展中，第一动态范围表示由电缆调制解调器输出的实际功率电平的调制解调器动态范围与用于识别由电缆调制解调器输出的实际功率电平的头端动态范围之间的差异。

公开(公告)号：US07627728B1

公开(公告)日：2009-12-01

申请号：US11321459

申请日：2005-12-29

申请人： Guenter E. Roeck ,  Sameer Lokray

发明人： Guenter E. Roeck ,  Sameer Lokray

IPC分类号： G06F12/16 ,  G06F11/00

CPC分类号： G06F11/203 ,  G06F11/1438

摘要： A system, method, and computer-accessible medium are disclosed for efficient generation of application snapshots. Execution of an application is stopped, wherein a plurality of memory pages are accessible to the application. By altering page permissions of the plurality of memory pages, a state of the plurality of memory pages is preserved while the execution of the application is stopped. The execution of the application may be restarted after the state of the plurality of memory pages has been preserved. The state of the plurality of memory pages may be captured after the execution of the application has been restarted.

摘要翻译： 公开了一种用于有效生成应用快照的系统，方法和计算机可访问介质。 停止执行应用程序，其中多个存储器页面可被应用程序访问。 通过改变多个存储器页面的页面许可，在停止执行应用程序的同时保留多个存储器页面的状态。 可以在多个存储器页面的状态被保留之后重新启动应用程序的执行。 可以在重新启动应用程序的执行之后捕获多个存储器页面的状态。

公开(公告)号：US07581220B1

公开(公告)日：2009-08-25

申请号：US11285272

申请日：2005-11-22

申请人： Guenter E. Roeck

发明人： Guenter E. Roeck

IPC分类号： G06F9/46

CPC分类号： G06F11/203 ,  G06F9/542 ,  G06F9/545 ,  G06F11/1469 ,  G06F11/1471 ,  G06F11/2046 ,  G06F11/2097 ,  G06F2201/84 ,  G06F2209/542 ,  G06F2209/543

摘要： A system, method, and computer-accessible medium for modifying user memory from an arbitrary kernel state are disclosed. The kernel may generate a modification to the context of the process. Subsequently, the kernel may pass control to the process in user mode, and further, the process may pass control from the user mode to the kernel in response to the modification of the context of the process. The kernel may then modify the process memory from kernel mode.

摘要翻译： 公开了一种用于从任意内核状态修改用户存储器的系统，方法和计算机可访问介质。 内核可能会生成对进程上下文的修改。 随后，内核可以以用户模式将控制传递给进程，并且此外，响应于对进程的上下文的修改，该进程可以将控制从用户模式传递到内核。 然后，内核可以从内核模式修改进程内存。