公开(公告)号：USRE44661E1

公开(公告)日：2013-12-24

申请号：US11636725

申请日：2006-12-06

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

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

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

CPC classification number: H04L45/00 ,  G06F11/2005 ,  H04L45/22 ,  H04L45/28

Abstract: 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.

Abstract translation: 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：US06820210B1

公开(公告)日：2004-11-16

申请号：US10418452

申请日：2003-04-17

Applicant: Feisal Daruwalla ,  Hon Wah Chin ,  David Tsiang ,  George Suwala ,  Tony Bates

Inventor： Feisal Daruwalla ,  Hon Wah Chin ,  David Tsiang ,  George Suwala ,  Tony Bates

IPC: G06F1100

CPC classification number: H04L45/28 ,  H04L12/42 ,  H04L12/437 ,  H04L45/22

Abstract: The present invention provides a protection protocol for fault recovery, such as a ring wrap, for a network, such as a two line bi-directional ring network. An embodiment of the present invention works in conjunction with a ring topology network in which a node in the network can identify a problem with a connection between the node and a first neighbor. The present invention provides 1 protection protocol which simplifies the coordination required by the nodes in a ring network. The nodes do not need to maintain a topology map of the ring, identifying and locating each node on the ring, for effective protection. Additionally, independently operating ring networks can be merged and the protection protocol will appropriately remove a protection, such as a ring wrap, to allow the formation of a single ring. It also provides for multiple levels of protection priority so that protection for a high priority failure, such as a physical break in a connection, would remove protection for a low priority failure, such as signal degrade, on another link.

Abstract translation: 本发明提供了一种用于故障恢复的保护协议，例如用于诸如双线双向环网络的网络的环绕。 本发明的实施例与环形拓扑网络一起工作，其中网络中的节点可以识别节点和第一邻居之间的连接的问题。 本发明提供了一种保护协议，其简化了环网中的节点所需的协调。 节点不需要维护环的拓扑图，识别和定位环上的每个节点，以进行有效的保护。 此外，独立操作的环网络可以被合并，并且保护协议将适当地去除诸如环圈之类的保护以允许形成单个环。 它还提供多级别的保护优先级，以便保护高优先级故障，例如连接中的物理中断，将消除对另一个链路上的低优先级故障（如信号降级）的保护。

公开(公告)号：US6128296A

公开(公告)日：2000-10-03

申请号：US943761

申请日：1997-10-03

Applicant: Feisal Daruwalla ,  Hon Wah Chin

Inventor： Feisal Daruwalla ,  Hon Wah Chin

IPC: H04L12/46 ,  H04L12/56 ,  H04L12/28

CPC classification number: H04L12/4625 ,  H04L49/351

Abstract: A method and apparatus for packet switching using distributed address tables. A first table of station addresses and their associated switching device ports is maintained on a central node of a switching device. Entries in the first table are based on learning information associated with packets forwarded by the central node. A second table of station addresses and their associated switching device ports is maintained on a local node of the switching device. Entries in the second table are based on learning information associated with packets forwarded by the local node. The packets forwarded by the local node include packets not forwarded by the central node so that the first and second tables of station addresses are different from one another.

Abstract translation: 一种使用分布式地址表进行分组交换的方法和装置。 站地址的第一表及其关联的交换设备端口被维护在交换设备的中心节点上。 第一个表中的条目是基于与由中央节点转发的数据包相关联的学习信息。 站地址的第二表及其关联的交换设备端口被维护在交换设备的本地节点上。 第二表中的条目是基于与由本地节点转发的分组相关联的学习信息。 由本地节点转发的分组包括中心节点未转发的分组，使得站地址的第一和第二表彼此不同。

公开(公告)号：US20060251097A1

公开(公告)日：2006-11-09

申请号：US11484249

申请日：2006-07-10

Applicant: John Chapman ,  Daniel Crocker ,  Feisal Daruwalla ,  Joanna Zang ,  Yong Lu

Inventor： John Chapman ,  Daniel Crocker ,  Feisal Daruwalla ,  Joanna Zang ,  Yong Lu

IPC: H04L12/28

CPC classification number: H04L12/2801 ,  H04N21/242

Abstract: 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.

公开(公告)号：US07966409B1

公开(公告)日：2011-06-21

申请号：US10899668

申请日：2004-07-26

Applicant: Feisal Daruwalla ,  James R. Forster ,  Guenter E. Roeck ,  Richard M. Woundy ,  Michael A. Thomas

Inventor： Feisal Daruwalla ,  James R. Forster ,  Guenter E. Roeck ,  Richard M. Woundy ,  Michael A. Thomas

IPC: G06F15/16

CPC classification number: 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

Abstract: 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.

Abstract translation: 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：US06839829B1

公开(公告)日：2005-01-04

申请号：US09484189

申请日：2000-01-18

Applicant: Feisal Daruwalla ,  James R. Forster ,  Guenter E. Roeck ,  Richard M. Woundy ,  Michael A. Thomas

Inventor： Feisal Daruwalla ,  James R. Forster ,  Guenter E. Roeck ,  Richard M. Woundy ,  Michael A. Thomas

IPC: H04L12/28 ,  H04L12/56 ,  H04N7/173 ,  G06F15/177 ,  G06F11/273 ,  G06F15/173

CPC classification number: 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

Abstract: 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.

Abstract translation: 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：US06269452B1

公开(公告)日：2001-07-31

申请号：US09067482

申请日：1998-04-27

Applicant: Feisal Daruwalla ,  Hon Wah Chin ,  David Tsiang ,  George Suwala ,  Tony Bates

Inventor： Feisal Daruwalla ,  Hon Wah Chin ,  David Tsiang ,  George Suwala ,  Tony Bates

IPC: G06F1100

CPC classification number: H04L45/28 ,  H04L12/42 ,  H04L12/437 ,  H04L45/22

Abstract: The present invention provides a protection protocol for fault recovery, such as a ring wrap, for a network, such as a two line bi-directional ring network. An embodiment of the present invention works in conjunction with a ring topology network in which a node in the network can identify a problem with a connection between the node and a first neighbor. The present invention provides a protection protocol which simplifies the coordination required by the nodes in a ring network. The nodes do not need to maintain a topology map of the ring, identifying and locating each node on the ring, for effective protection. Additionally, independently operating ring networks can be merged and the protection protocol will appropriately remove a protection, such as a ring wrap, to allow the formation of a single ring. It also provides for multiple levels of protection priority so that protection for a high priority failure, such as a physical break in a connection, would remove protection for a low priority failure, such as a signal degrade, on another link.

Abstract translation: 本发明提供了一种用于故障恢复的保护协议，例如用于诸如双线双向环网络的网络的环绕。 本发明的实施例与环形拓扑网络一起工作，其中网络中的节点可以识别节点和第一邻居之间的连接的问题。 本发明提供了一种保护协议，其简化了环网中节点所需的协调。 节点不需要维护环的拓扑图，识别和定位环上的每个节点，以进行有效的保护。 此外，独立操作的环网络可以被合并，并且保护协议将适当地去除诸如环圈之类的保护以允许形成单个环。 它还提供多个级别的保护优先级，以便保护高优先级的故障，例如连接中的物理中断，将消除对另一个链路上低优先级故障（例如信号降级）的保护。

公开(公告)号：US20060262722A1

公开(公告)日：2006-11-23

申请号：US11484288

申请日：2006-07-10

Applicant: John Chapman ,  Daniel Crocker ,  Feisal Daruwalla ,  Joanna Zang ,  Yong Lu

Inventor： John Chapman ,  Daniel Crocker ,  Feisal Daruwalla ,  Joanna Zang ,  Yong Lu

IPC: H04L12/26 ,  H04L12/28

CPC classification number: H04L12/2801 ,  H04N21/242

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07068712B1

公开(公告)日：2006-06-27

申请号：US09484612

申请日：2000-01-18

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

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

IPC: H04B1/38

CPC classification number: G06F11/2005 ,  H04L29/12009 ,  H04L61/00 ,  H04N7/173 ,  H04N21/64738

Abstract: 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.

Abstract translation: 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：US06615362B1

公开(公告)日：2003-09-02

申请号：US10170980

申请日：2002-06-12

Applicant: Feisal Daruwalla ,  Hon Wah Chin ,  David Tsiang ,  George Suwala ,  Tony Bates

Inventor： Feisal Daruwalla ,  Hon Wah Chin ,  David Tsiang ,  George Suwala ,  Tony Bates

IPC: G06F1100

CPC classification number: H04L45/28 ,  H04L12/42 ,  H04L12/437 ,  H04L45/22

Abstract: The present invention provides a protection protocol for fault recovery, such as a ring wrap, for a network, such as a two line bi-directional ring network. An embodiment of the present invention works in conjunction with a ring topology network in which a node in the network can identify a problem with a connection between the node and a first neighbor. The present invention provides a protection protocol which simplifies the coordination required by the nodes in a ring network. The nodes do not need to maintain a topology map of the ring, identifying and locating each node on the ring, for effective protection. Additionally, independently operating ring networks can be merged and the protection protocol will appropriately remove a protection, such as a ring wrap, to allow the formation of a single ring. It also provides for multiple levels of protection priority so that protection for a high priority failure, such as a physical break in a connection, would remove protection for a low priority failure, such as a signal degrade, on another link.

Abstract translation: 本发明提供了一种用于故障恢复的保护协议，例如用于诸如双线双向环网络的网络的环绕。 本发明的实施例与环形拓扑网络一起工作，其中网络中的节点可以识别节点和第一邻居之间的连接的问题。 本发明提供了一种保护协议，其简化了环网中节点所需的协调。 节点不需要维护环的拓扑图，识别和定位环上的每个节点，以进行有效的保护。 此外，独立操作的环网络可以被合并，并且保护协议将适当地去除诸如环圈之类的保护以允许形成单个环。 它还提供多级保护优先级，以便保护高优先级的故障，例如连接中的物理中断，将消除对另一个链路上低优先级故障（如信号降级）的保护。