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公开(公告)号：US20100154016A1
公开(公告)日：2010-06-17
申请号：US12334392
申请日：2008-12-12
申请人： De Fu Li , Pawel Sowinski , Robert Goguen , Tong Liu , Alon Bernstein
发明人： De Fu Li , Pawel Sowinski , Robert Goguen , Tong Liu , Alon Bernstein
IPC分类号： H04N7/173
CPC分类号： H04N21/6543 , H04N21/4263 , H04N21/4381 , H04N21/4383 , H04N21/6118 , H04N21/6125 , H04N21/6583
摘要： In one example, a Cable Modem Termination System (CMTS) sends first bandwidth allocation messages to a first upstream transmit interface on a cable modem and send second bandwidth allocation messages to a second upstream transmit interface on the cable modem. The bandwidth allocation messages indicate transmit windows for the cable modem to range over the interfaces. The transmit windows included in the first bandwidth allocation messages are spaced based on receipt of ranging requests from the second upstream transmit interface, and the transmit windows included in the second bandwidth allocation messages are spaced based on receipt of ranging requests from the first upstream transmit interface.
摘要翻译： 在一个示例中，有线调制解调器终端系统（CMTS）将第一带宽分配消息发送到有线调制解调器上的第一上行传输接口，并向电缆调制解调器上的第二上行传输接口发送第二带宽分配消息。 带宽分配消息指示电缆调制解调器在接口上范围的传输窗口。 包括在第一带宽分配消息中的发送窗口基于来自第二上行发送接口的测距请求的接收而间隔开，并且包括在第二带宽分配消息中的发送窗口基于来自第一上行发送接口的测距请求的接收而间隔开 。
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公开(公告)号：US08111711B2
公开(公告)日：2012-02-07
申请号：US12334392
申请日：2008-12-12
申请人： DeFu Li , Pawel Sowinski , Robert Goguen , Tong Liu , Alon Bernstein
发明人： DeFu Li , Pawel Sowinski , Robert Goguen , Tong Liu , Alon Bernstein
IPC分类号： H04L7/04
CPC分类号： H04N21/6543 , H04N21/4263 , H04N21/4381 , H04N21/4383 , H04N21/6118 , H04N21/6125 , H04N21/6583
摘要： In one example, a Cable Modem Termination System (CMTS) sends first bandwidth allocation messages to a first upstream transmit interface on a cable modem and send second bandwidth allocation messages to a second upstream transmit interface on the cable modem. The bandwidth allocation messages indicate transmit windows for the cable modem to range over the interfaces. The transmit windows included in the first bandwidth allocation messages are spaced based on receipt of ranging requests from the second upstream transmit interface, and the transmit windows included in the second bandwidth allocation messages are spaced based on receipt of ranging requests from the first upstream transmit interface.
摘要翻译： 在一个示例中，有线调制解调器终端系统（CMTS）将第一带宽分配消息发送到有线调制解调器上的第一上行传输接口，并向电缆调制解调器上的第二上行传输接口发送第二带宽分配消息。 带宽分配消息指示电缆调制解调器在接口上范围的传输窗口。 包括在第一带宽分配消息中的发送窗口基于来自第二上行发送接口的测距请求的接收而间隔开，并且包括在第二带宽分配消息中的发送窗口基于来自第一上行发送接口的测距请求的接收而间隔开 。
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公开(公告)号：US07839773B2
公开(公告)日：2010-11-23
申请号：US12075838
申请日：2008-03-14
申请人： De Fu Li , Pawel Sowinski , James An , Robert Goguen
发明人： De Fu Li , Pawel Sowinski , James An , Robert Goguen
CPC分类号： H04L5/1438 , H04J3/0655 , H04J3/0682 , H04J3/14 , H04L12/2801 , H04L12/2861 , H04L12/287 , H04L12/2898
摘要： In one embodiment, a first ranging timing description describing at least a duration of time during which a subject cable modem (CM) may burst and a duration of time during which the subject CM and other CMs in a multiple access network are not permitted to burst is translated into a second ranging timing description describing a duration during which a burst from the subject CM is expected to be received by a cable modem termination system (CMTS). The CMTS is conditioned to receive a burst from the subject CM during the duration of time described by the second ranging timing description. A timing offset is determined from at least an actual time a burst from the subject CM is received by the CMTS and the duration of time during which the subject CM and other CMs in the multiple access network are not permitted to burst to produce a determined timing offset. The determined timing offset is reported to compensate for delay in the multiple access network and the subject CM.
摘要翻译： 在一个实施例中，描述主题电缆调制解调器（CM）可以突发的至少一段持续时间的第一测距定时描述和多个接入网络中的主体CM和其他CM不允许突发的持续时间 被描述为描述来自主题CM的脉冲串期望由电缆调制解调器终端系统（CMTS）接收的持续时间的第二测距定时描述。 CMTS被调节为在由第二测距定时描述描述的持续时间期间从主题CM接收突发。 从CMTS接收到来自主题CM的突发的至少实际时间和多个接入网络中的主体CM和其他CM不允许突发以产生确定的定时的持续时间来确定定时偏移 抵消。 报告确定的定时偏移以补偿多址网络和对象CM中的延迟。
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公开(公告)号：US20090249417A1
公开(公告)日：2009-10-01
申请号：US12060824
申请日：2008-04-01
申请人： Robert Goguen , Nicos Achilleoudis , De Fu Li , Pawel Sowinski
发明人： Robert Goguen , Nicos Achilleoudis , De Fu Li , Pawel Sowinski
IPC分类号： H04N7/173
CPC分类号： H04L12/2801 , H04L47/70 , H04L47/803 , H04L47/826 , H04N21/6402 , H04N21/64738 , H04N21/64769
摘要： In one embodiment, a Cable Modem Termination System (CMTS) generates a bandwidth grant message corresponding to a time segment. The CMTS identifies a portion of the time segment to be assigned according to received bandwidth request messages originating from downstream cable modems. The CMTS determines whether a remaining portion of the time segment can accommodate more than N broadcast contention slots, and if so, selects at least one of the cable modems for receiving an upstream bandwidth boost.
摘要翻译： 在一个实施例中，电缆调制解调器终端系统（CMTS）生成对应于时间段的带宽授权消息。 CMTS根据从下游电缆调制解调器产生的接收的带宽请求消息识别要分配的时间段的一部分。 CMTS确定时间段的剩余部分是否可以容纳多于N个广播竞争时隙，如果是，则选择用于接收上行带宽增强的至少一个电缆调制解调器。
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公开(公告)号：US08134921B2
公开(公告)日：2012-03-13
申请号：US12060824
申请日：2008-04-01
申请人： Robert Goguen , De Fu Li , Pawel Sowinski , Nicos Achilleoudis
发明人： Robert Goguen , De Fu Li , Pawel Sowinski , Nicos Achilleoudis
IPC分类号： H04J3/16
CPC分类号： H04L12/2801 , H04L47/70 , H04L47/803 , H04L47/826 , H04N21/6402 , H04N21/64738 , H04N21/64769
摘要： In one embodiment, a Cable Modem Termination System (CMTS) generates a bandwidth grant message corresponding to a time segment. The CMTS identifies a portion of the time segment to be assigned according to received bandwidth request messages originating from downstream cable modems. The CMTS determines whether a remaining portion of the time segment can accommodate more than N broadcast contention slots, and if so, selects at least one of the cable modems for receiving an upstream bandwidth boost.
摘要翻译： 在一个实施例中，电缆调制解调器终端系统（CMTS）生成对应于时间段的带宽授权消息。 CMTS根据从下游电缆调制解调器产生的接收的带宽请求消息识别要分配的时间段的一部分。 CMTS确定时间段的剩余部分是否可以容纳多于N个广播竞争时隙，如果是，则选择用于接收上行带宽增强的至少一个电缆调制解调器。
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公开(公告)号：US20090232111A1
公开(公告)日：2009-09-17
申请号：US12075838
申请日：2008-03-14
申请人： De Fu Li , Pawel Sowinski , James An , Robert Goguen
发明人： De Fu Li , Pawel Sowinski , James An , Robert Goguen
CPC分类号： H04L5/1438 , H04J3/0655 , H04J3/0682 , H04J3/14 , H04L12/2801 , H04L12/2861 , H04L12/287 , H04L12/2898
摘要： In one embodiment, a first ranging timing description describing at least a duration of time during which a subject cable modem (CM) may burst and a duration of time during which the subject CM and other CMs in a multiple access network are not permitted to burst is translated into a second ranging timing description describing a duration during which a burst from the subject CM is expected to be received by a cable modem termination system (CMTS). The CMTS is conditioned to receive a burst from the subject CM during the duration of time described by the second ranging timing description. A timing offset is determined from at least an actual time a burst from the subject CM is received by the CMTS and the duration of time during which the subject CM and other CMs in the multiple access network are not permitted to burst to produce a determined timing offset. The determined timing offset is reported to compensate for delay in the multiple access network and the subject CM.
摘要翻译： 在一个实施例中，描述主题电缆调制解调器（CM）可以突发的至少一段持续时间的第一测距定时描述和多个接入网络中的主体CM和其他CM不允许突发的持续时间 被描述为描述来自主题CM的脉冲串期望由电缆调制解调器终端系统（CMTS）接收的持续时间的第二测距定时描述。 CMTS被调节为在由第二测距定时描述描述的持续时间期间从主题CM接收突发。 从CMTS接收到来自主题CM的突发的至少实际时间以及多访问网络中的主题CM和其他CM不被允许突发以产生确定的定时的持续时间来确定定时偏移 抵消。 报告确定的定时偏移以补偿多址网络和对象CM中的延迟。
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公开(公告)号：US20060013125A1
公开(公告)日：2006-01-19
申请号：US10891704
申请日：2004-07-15
IPC分类号： H04L12/26
摘要： A technique treats a protected forwarding adjacency (FA) as a dynamic entity in that it allows a backup tunnel associated with the FA to carry traffic for the FA, when it's primary tunnel has failed, up to a predetermined amount of time. If after the predetermined amount of time has elapsed and the FA has not recovered (e.g., the primary tunnel has not been reestablished), a network topology change is automatically triggered causing the network to converge on a new network topology. By triggering the network topology change, a path that is more optimal than the path associated with the backup tunnel may be subsequently determined to carry the traffic.
摘要翻译： 一种技术将受保护的转发邻接（FA）视为动态实体，因为当主隧道发生故障时，它允许与FA相关联的备用隧道携带FA的流量，直到预定的时间量。 如果经过了预定的时间量并且FA没有恢复（例如，主隧道没有被重新建立），则自动地触发网络拓扑变化，导致网络收敛在新的网络拓扑上。 通过触发网络拓扑变化，可以随后确定比与备用隧道相关联的路径更优化的路径来承载流量。
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公开(公告)号：US07792111B2
公开(公告)日：2010-09-07
申请号：US12148816
申请日：2008-04-23
申请人： Ashok Narayanan , Robert Goguen , Ali Sajassi , Samir Vapiwala
发明人： Ashok Narayanan , Robert Goguen , Ali Sajassi , Samir Vapiwala
摘要： A method and apparatus for establishing multicast and unicast forwarding are disclosed. In one embodiment, a method includes transmitting path messages to a plurality of receivers, receiving a plurality of messages in response to the path messages and establishing unicast and multicast forwarding based on received unicast and multicast labels. Each of the receivers is associated with a sub-LSP (Label Switched Path) in a Point-to-Multipoint (P2MP) LSP and the response messages include a multicast label and at least one unicast label corresponding to a unicast path to one of the receivers.
摘要翻译： 公开了一种建立组播和单播转发的方法和装置。 在一个实施例中，一种方法包括向多个接收机发送路径消息，响应于路径消息接收多条消息，并基于接收的单播和多播标签建立单播和多播转发。 每个接收机与点对多点（P2MP）LSP中的子LSP（标签交换路径）相关联，并且响应消息包括多播标签和对应于单播路径中的一个的至少一个单播标签 接收器。
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公开(公告)号：US07343423B2
公开(公告)日：2008-03-11
申请号：US10679981
申请日：2003-10-07
申请人： Robert Goguen , Alton Lo
发明人： Robert Goguen , Alton Lo
IPC分类号： G06F15/173 , H04L12/28 , H04L12/56
摘要： A Fast Reroute implementation where switchover time to backup tunnels upon failure of a protected network element is independent of a number of entries corresponding to forwarding equivalence classes forwarding over LSPs using that element. During normal operation of a packet forwarding device, adjacency information for a received packet is retrieved from a forwarding table based on a look-up of the packet's forwarding equivalence class. Upon failure of a link or node, the appropriate entries in this forwarding table are rewritten to implement the switchover to preconfigured backup tunnels. The switchover is effective even before the rewrite process has completed. Upon detection of the failure, forwarding processing shifts to a fix-up mode. During the fix-up mode, the look-up to the previously mentioned forwarding table is followed by a look-up to a backup tunnel adjacency table based on a pointer retrieved from the forwarding table. Operations relating to use of this backup tunnel adjacency table increase forwarding time somewhat but only during the special fix-up mode.
摘要翻译： 在受保护的网络元件发生故障时，备份隧道的切换时间的快速重路由独立于与使用该元素的LSP上的转发等价类转发相对应的条目数。 在分组转发设备的正常操作期间，基于分组的转发等价类的查找，从转发表中检索接收到的分组的邻接信息。 在链路或节点发生故障时，将重写此转发表中的相应条目，以实现对预先配置的备份隧道的切换。 即使在重写过程完成之前，切换也是有效的。 在检测到故障时，转发处理转移到固定模式。 在修复模式期间，前面提到的转发表的查找之后是基于从转发表检索的指针来查找备份隧道邻接表。 与使用此备份隧道邻接表相关的操作稍微增加了转发时间，但仅在特殊的修复模式下才有效。
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公开(公告)号：US20050097219A1
公开(公告)日：2005-05-05
申请号：US10679981
申请日：2003-10-07
申请人： Robert Goguen , Alton Lo
发明人： Robert Goguen , Alton Lo
IPC分类号： G06F15/173 , H04L20060101 , H04L12/56
摘要： A Fast Reroute implementation where switchover time to backup tunnels upon failure of a protected network element is independent of a number of entries corresponding to forwarding equivalence classes forwarding over LSPs using that element. During normal operation of a packet forwarding device, adjacency information for a received packet is retrieved from a forwarding table based on a look-up of the packet's forwarding equivalence class. Upon failure of a link or node, the appropriate entries in this forwarding table are rewritten to implement the switchover to preconfigured backup tunnels. The switchover is effective even before the rewrite process has completed. Upon detection of the failure, forwarding processing shifts to a fix-up mode. During the fix-up mode, the look-up to the previously mentioned forwarding table is followed by a look-up to a backup tunnel adjacency table based on a pointer retrieved from the forwarding table. Operations relating to use of this backup tunnel adjacency table increase forwarding time somewhat but only during the special fix-up mode.
摘要翻译： 在受保护的网络元件发生故障时，备份隧道的切换时间的快速重路由独立于与使用该元素的LSP上的转发等价类转发相对应的条目数。 在分组转发设备的正常操作期间，基于分组的转发等价类的查找，从转发表中检索接收到的分组的邻接信息。 在链路或节点发生故障时，将重写此转发表中的相应条目，以实现对预先配置的备份隧道的切换。 即使在重写过程完成之前，切换也是有效的。 在检测到故障时，转发处理转移到固定模式。 在修复模式期间，前面提到的转发表的查找之后是基于从转发表检索的指针来查找备份隧道邻接表。 与使用此备份隧道邻接表相关的操作稍微增加了转发时间，但仅在特殊的修复模式下才有效。
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