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    Method for a cable modem to rapidly switch to a backup CMTS
    1.
    再颁专利
    Method for a cable modem to rapidly switch to a backup CMTS 有权
    电缆调制解调器快速切换到备份CMTS的方法

    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。

    Downstream channel change technique implemented in an access network
    3.
    发明授权
    Downstream channel change technique implemented in an access network 有权
    在接入网中实现的下行信道改变技术

    公开(公告)号：US07672230B2

    公开(公告)日：2010-03-02

    申请号：US11484249

    申请日：2006-07-10

    申请人： John T. Chapman ,  Daniel W. Crocker ,  Feisal Y. Daruwalla ,  Joanna Qun Zang ,  Yong Lu

    发明人： John T. Chapman ,  Daniel W. Crocker ,  Feisal Y. Daruwalla ,  Joanna Qun Zang ,  Yong Lu

    IPC分类号： G01R31/08 ,  G06F11/00 ,  H04L1/00 ,  H04L12/28

    CPC分类号： H04L12/2801 ,  H04N21/242

    摘要： A dynamic channel change technique is disclosed which may be implemented between nodes and a Head End of an access network. Initially a network device may communicate with the Head End via a first downstream channel and a first upstream channel. When the network device receives a dynamic channel change request which includes instructions for the network device to switch to a second downstream channel, the network device may respond by switching from the first downstream channel to the second downstream channel. Thereafter, the network device may communicate with the Head End via the second downstream channel and first upstream channel. Further, according to a specific embodiment, the dynamic channel change request may also include an upstream channel change request for causing the network device to switch from a first upstream channel to a second upstream channel.

    摘要翻译： 公开了可以在接入网络的节点和头端之间实现的动态信道改变技术。 最初，网络设备可以经由第一下游信道和第一上行信道与头端进行通信。 当网络设备接收到包括用于网络设备切换到第二下行信道的指令的动态信道改变请求时，网络设备可以通过从第一下游信道切换到第二下游信道来进行响应。 此后，网络设备可以经由第二下游信道和第一上行信道与头端进行通信。 此外，根据具体实施例，动态信道改变请求还可以包括用于使网络设备从第一上行信道切换到第二上行信道的上行信道改变请求。

    Method and apparatus for N+1 RF switch with passive working path and active protection path
    5.
    发明授权
    Method and apparatus for N+1 RF switch with passive working path and active protection path 有权
    具有被动工作路径和主动保护路径的N + 1 RF开关的方法和装置

    公开(公告)号：US07817540B1

    公开(公告)日：2010-10-19

    申请号：US10141893

    申请日：2002-05-08

    申请人： Feisal Daruwalla ,  John T. Chapman ,  Richard Meller ,  Roland Chan ,  Nicos Achilleoudis

    发明人： Feisal Daruwalla ,  John T. Chapman ,  Richard Meller ,  Roland Chan ,  Nicos Achilleoudis

    IPC分类号： G01R31/08

    CPC分类号： H04L45/00 ,  H04L45/22 ,  H04L45/28 ,  H04N21/239

    摘要： The present disclosure relates an improved cable data switching unit that provides a fail-over system whereby one line card can protect a plurality of US (upstream) or DS (downstream) channel line cards, providing N+1 protection, with one linecard being able to protect N number of working linecards. When a failure is detected in a working linecard, the signals being routed by the failing linecards are re-routed seamlessly to a protect linecard. This disclosure provides for data to be passively routed, providing for data flow even if power is lost.

    摘要翻译： 本公开涉及一种改进的电缆数据交换单元，其提供故障转移系统，由此一个线路卡可以保护多个US（上游）或DS（下游）信道线路卡，提供N + 1保护，一个线卡可以 保护N个工作线卡。 当在工作线卡中检测到故障时，由故障线路卡路由的信号将无缝地重新路由到保护线卡。 该公开内容提供了被动地路由的数据，即使断电也提供数据流。

    CONFIGURATION OF SERVICE GROUPS IN A CABLE NETWORK
    6.
    发明申请
    CONFIGURATION OF SERVICE GROUPS IN A CABLE NETWORK 审中-公开
    在电缆网络中配置服务组

    公开(公告)号：US20080273548A1

    公开(公告)日：2008-11-06

    申请号：US11744148

    申请日：2007-05-03

    申请人： Chrisanto de Jesus Leano ,  Yong Lu ,  Jin Zhang ,  Tung-Fai Chan ,  Tony Yuan-Kon Chang ,  Alon Shlomo Bernstein ,  John T. Chapman

    发明人： Chrisanto de Jesus Leano ,  Yong Lu ,  Jin Zhang ,  Tung-Fai Chan ,  Tony Yuan-Kon Chang ,  Alon Shlomo Bernstein ,  John T. Chapman

    IPC分类号： H04B3/02

    CPC分类号： H04L12/2856 ,  H04L12/2801 ,  H04L12/2861 ,  H04L12/2874 ,  H04L41/0893 ,  H04L41/509 ,  H04N21/42684 ,  H04N21/4383

    摘要： A method and apparatus for configuring service groups in a cable network is provided. A method may comprise identifying a primary downstream channel in a cable network and identifying a plurality of fiber nodes fed by the primary downstream channel. For each fiber node identified, the method may comprise identifying a set of downstream channels communicating with the fiber node. If duplicate sets are identified, duplicate sets of downstream channels may be eliminated and a downstream service group may be associated with each of the remaining sets of downstream channels. In an example embodiment, at least one Media Access Control (MAC) domain is automatically selected to correspond to the identified service groups.

    摘要翻译： 提供了一种用于配置有线网络中的服务组的方法和装置。 方法可以包括识别有线网络中的主要下行信道，并且识别由主要下行信道馈送的多个光纤节点。 对于所识别的每个光纤节点，所述方法可以包括识别与所述光纤节点通信的一组下行信道。 如果识别出重复集合，则可以消除重复的下游信道集合，并且下游业务组可以与下游信道的剩余集合中的每一个相关联。 在示例实施例中，自动选择至少一个媒体访问控制（MAC）域以对应于所标识的服务组。

    DOCSIS out-of-band control signal frequency conversion for legacy set-top boxes
    7.
    发明授权
    DOCSIS out-of-band control signal frequency conversion for legacy set-top boxes 有权
    DOCSIS传统机顶盒的带外控制信号频率转换

    公开(公告)号：US09247310B2

    公开(公告)日：2016-01-26

    申请号：US13472691

    申请日：2012-05-16

    申请人： John T. Chapman ,  Mark A. Palazzo

    发明人： John T. Chapman ,  Mark A. Palazzo

    IPC分类号： H04N21/426 ,  H04N21/61 ,  H04N21/65 ,  H04N7/173 ,  H04N21/6543 ,  H04N21/6547 ,  H04N7/10

    CPC分类号： H04N21/6118 ,  H04N7/10 ,  H04N21/42676 ,  H04N21/6543 ,  H04N21/6547

    摘要： Techniques are provided for up-converting a downstream set-top box control signal to a frequency that is above a cable television system upstream communications band. The downstream set-top box control signal is down-converted to a frequency in a set-top box control band and injected into a set-top box communications pathway. The downstream set-top box control signal may be up-converted from baseband or from the set-top box control band to a frequency in cable television system downstream communications band and transmitted on a DOCSIS RF channel.

    摘要翻译： 技术被提供用于将下游机顶盒控制信号上变频到有线电视系统上游通信频带之上的频率。 下游机顶盒控制信号被下变频成机顶盒控制频带中的频率，并注入到机顶盒通信通路中。 下行机顶盒控制信号可以从基带或机顶盒控制频带上变频到有线电视系统下行通信频段的频率，并在DOCSIS RF信道上传输。

    Downstream device architecture and control
    8.
    发明授权
    Downstream device architecture and control 有权
    下游设备架构与控制

    公开(公告)号：US09246701B2

    公开(公告)日：2016-01-26

    申请号：US13611045

    申请日：2012-09-12

    申请人： John T. Chapman

    发明人： John T. Chapman

    IPC分类号： H04L12/28 ,  H04L12/24 ,  H04N21/258 ,  H04N21/61 ,  H04N21/643 ,  H04N21/222 ,  H04N21/647 ,  H04L29/12

    CPC分类号： H04L41/0803 ,  H04L12/2801 ,  H04L12/2863 ,  H04L61/2015 ,  H04N21/2221 ,  H04N21/25816 ,  H04N21/6118 ,  H04N21/6168 ,  H04N21/64322 ,  H04N21/64707

    摘要： Techniques are provided for controlling downstream Converged Cable Access Platform (CCAP) access points. At the CCAP access point having a network interface and a coaxial interface, control plane information is received from a Cable Modem Termination System (CMTS) via the network interface, where the control plane information is designed to configure the CCAP access point to enable communication over the network interface and the coaxial interface. At the CCAP access point, data plane and control plane information is received from the CMTS, and the data plane information transmitted via the coaxial interface to one or more customer termination devices.

    摘要翻译： 提供技术来控制下游融合电缆接入平台（CCAP）接入点。 在具有网络接口和同轴接口的CCAP接入点，经由网络接口​​从有线调制解调器终端系统（CMTS）接收控制平面信息，其中控制平面信息被设计为配置CCAP接入点以使得能够进行通信 网络接口和同轴接口。 在CCAP接入点，从CMTS接收数据平面和控制平面信息，并且经由同轴接口传送到一个或多个客户终端设备的数据平面信息。

    System and method for discovering and verifying a hybrid fiber-coaxial topology in a cable network environment
    9.
    发明授权
    System and method for discovering and verifying a hybrid fiber-coaxial topology in a cable network environment 有权
    用于发现和验证有线网络环境中的混合光纤同轴拓扑的系统和方法

    公开(公告)号：US08989221B2

    公开(公告)日：2015-03-24

    申请号：US13487302

    申请日：2012-06-04

    申请人： Rajiv Asati ,  Alon Bernstein ,  John T. Chapman

    发明人： Rajiv Asati ,  Alon Bernstein ,  John T. Chapman

    IPC分类号： H04H20/28 ,  G01R31/08 ,  H04L12/24 ,  H04B3/46

    CPC分类号： H04L41/12 ,  H04B3/46 ,  H04B10/27 ,  H04L12/2801 ,  H04L41/0853

    摘要： A method in an example embodiment can include polling a first cable modem in a cable network and receiving a first response message from the first cable modem identifying a downstream frequency detected by the first cable modem. The method further includes determining the downstream frequency is split between at least two fiber nodes and determining a cable modem termination system (CMTS) service group topology, where the topology includes the at least two fiber nodes. In specific embodiments, determining that the downstream frequency is split is based on at least the first response message from the first cable modem and a second response message from a second cable modem. In more specific embodiments, the method includes constructing a hybrid fiber-coaxial (HFC) topology map of the cable network based on at least the first and second response messages, where the HFC topology map indicates the CMTS service group topology.

    摘要翻译： 示例实施例中的方法可以包括轮询有线网络中的第一电缆调制解调器，并且从第一电缆调制解调器接收识别第一电缆调制解调器检测到的下行频率的第一响应消息。 该方法还包括确定下行频率在至少两个光纤节点之间被分割并且确定电缆调制解调器终端系统（CMTS）服务组拓扑，其中拓扑包括至少两个光纤节点。 在具体实施例中，确定下行频率被拆分基于至少来自第一电缆调制解调器的第一响应消息和来自第二电缆调制解调器的第二响应消息。 在更具体的实施例中，该方法包括基于至少第一和第二响应消息来构建有线网络的混合光纤同轴（HFC）拓扑图，其中HFC拓扑图指示CMTS服务组拓扑。

    Managing L2VPN connectivity after a fiber node split
    10.
    发明授权
    Managing L2VPN connectivity after a fiber node split 有权
    在光纤节点分裂后管理L2VPN连接

    公开(公告)号：US08873549B2

    公开(公告)日：2014-10-28

    申请号：US12707626

    申请日：2010-02-17

    申请人： Rajiv Asati ,  John T. Chapman

    发明人： Rajiv Asati ,  John T. Chapman

    IPC分类号： H04L12/28 ,  H04L12/24 ,  H04L12/721 ,  H04L12/723 ,  H04L12/46

    CPC分类号： H04L41/0846 ,  H04L12/2801 ,  H04L12/4679 ,  H04L45/50 ,  H04L45/68

    摘要： In one example, a routing protocol is used to propagate or flood information over a network of Cable Modem Termination Systems (CMTSs) in response to a fiber node split that changes which of the CMTSs a cable modem is coupled thereto. The network processes the information and dynamically changes a pseudowire placement to maintain the Layer 2 Virtual Private Network (L2VPN) connectivity among cable modems of different CMTSs after the fiber node split.

    摘要翻译： 在一个示例中，路由协议用于响应于改变电缆调制解调器耦合到其的哪个CMTS的光纤节点拆分，通过有线调制解调器终端系统（CMTS）的网络传播或泛洪信息。 网络处理信息并动态地改变伪线放置以在光纤节点分裂之后维持不同CMTS的电缆调制解调器之间的第2层虚拟专用网（L2VPN）连接。