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121. 发明授权

US09077615B2 Global state resynchronization for path computation element failure during a reoptimization process 有权
标题翻译：重新优化过程中路径计算元素故障的全局状态重新同步
公开(公告)号：US09077615B2
公开(公告)日：2015-07-07
申请号：US13524632
申请日：2012-06-15
申请人： Jean-Philippe Vasseur , Stefano Previdi , David Ward , George Swallow
发明人： Jean-Philippe Vasseur , Stefano Previdi , David Ward , George Swallow
IPC分类号： H04L1/02 , H04J3/14 , H04L12/24 , H04L12/46 , H04L12/751 , H04L12/707 , H04L12/703 , H04L12/717 , H04L12/723 , H04L12/26
CPC分类号： H04L41/0663 , H04L12/4633 , H04L43/10 , H04L45/02 , H04L45/22 , H04L45/28 , H04L45/42 , H04L45/50
摘要： In one embodiment, a router initiates reroutes of one or more tunnels at the router as part of optimization of a plurality of tunnels in a computer network, and stores an original state of the one or more tunnels at the router prior to the optimization. By detecting whether path computation element (PCE) failure occurs prior to completion of the optimization, the router may revert to the original state of the one or more tunnels in response to PCE failure prior to completion of the optimization.
摘要翻译：在一个实施例中，路由器发起路由器处的一个或多个隧道的路由器作为计算机网络中的多个隧道的优化的一部分，并且在优化之前在路由器处存储一个或多个隧道的原始状态。通过检测在优化完成之前是否发生路径计算元件（PCE）故障，路由器可以在完成优化之前响应于PCE故障而恢复到一个或多个隧道的原始状态。

122. 发明授权

US09072100B2 Sub-slotting to improve packet success rate in carrier sense multiple access networks 有权
标题翻译：子时隙，以提高载波侦听多路接入网络中的分组成功率
公开(公告)号：US09072100B2
公开(公告)日：2015-06-30
申请号：US13187075
申请日：2011-07-20
申请人： Jean-Philippe Vasseur , Jonathan W. Hui
发明人： Jean-Philippe Vasseur , Jonathan W. Hui
IPC分类号： H04L12/403 , H04W74/08 , H04W74/02 , H04L12/413 , H04B1/713 , H04W48/16
CPC分类号： H04W74/0808 , H04B1/713 , H04L12/4035 , H04L12/413 , H04W48/16 , H04W74/02
摘要： In one embodiment, a communication device in a frequency hopping communication network determines an intention to forward a first packet in a particular timeslot of a frequency hopping sequence. As such, the device scans in receive mode for an initial portion of the particular timeslot on a particular frequency known to neighbors of the communication device for reaching the communication device. In response to determining that the communication device is receiving a second packet during the initial portion, the device remains in receive mode to receive a remainder of the second packet. Conversely, in response to not receiving the second packet during the initial portion, the device proceeds to transmit the first packet during a remainder of the particular timeslot.
摘要翻译：在一个实施例中，跳频通信网络中的通信设备确定在跳频序列的特定时隙中转发第一分组的意图。这样，设备以接收通信设备的邻居已知的特定频率的特定时隙的初始部分以接收模式扫描以到达通信设备。响应于在初始部分期间确定通信设备正在接收第二分组，设备保持接收模式以接收第二分组的剩余部分。相反，响应于在初始部分期间没有接收到第二分组，设备继续在特定时隙的剩余时间期间发送第一分组。

123. 发明授权

US09059867B2 Technique for selecting a path computation element based on response time delay 有权
标题翻译：基于响应时间延迟选择路径计算元素的技术
公开(公告)号：US09059867B2
公开(公告)日：2015-06-16
申请号：US11130058
申请日：2005-05-16
申请人： Jean-Philippe Vasseur , David R. Oran
发明人： Jean-Philippe Vasseur , David R. Oran
IPC分类号： H04L12/46 , H04L12/801 , H04L29/08
CPC分类号： H04L45/12 , H04L12/4633 , H04L47/10 , H04L47/12 , H04L67/104 , H04L67/1068 , H04L67/16 , H04L69/16
摘要： A technique efficiently selects a path computation element (PCE) to compute a path between nodes of a computer network. The PCE selection technique is illustratively based on dynamic advertisements of the PCE's available path computation resources, namely a predictive response time (PRT). To that end, the novel technique enables one or more PCEs to dynamically send (advertise) their available path computation resources to one or more path computation clients (PCCs). In addition, the technique enables the PCC to efficiently select a PCE (or set of PCEs) to service a path computation request based upon those available resources.
摘要翻译：一种技术有效地选择路径计算元件（PCE）来计算计算机网络的节点之间的路径。 PCE选择技术说明性地基于PCE可用路径计算资源的动态广告，即预测响应时间（PRT）。为此，新技术使得一个或多个PCE能够将其可用路径计算资源动态地发送（通告）给一个或多个路径计算客户端（PCC）。此外，该技术使得PCC能够基于这些可用资源有效地选择PCE（或一组PCE）来服务路径计算请求。

124. 发明授权

US09013983B2 Proactive source-based reverse path validation in computer networks 有权
标题翻译：计算机网络中基于源的反向路径验证
公开(公告)号：US09013983B2
公开(公告)日：2015-04-21
申请号：US13230154
申请日：2011-09-12
申请人： Jean-Philippe Vasseur , Jonathan W. Hui
发明人： Jean-Philippe Vasseur , Jonathan W. Hui
IPC分类号： G01R31/08 , H04L29/08 , H04L12/26 , H04L12/751 , H04L12/721 , H04L12/707 , H04L12/703 , H04L12/24
CPC分类号： H04L67/145 , H04L41/12 , H04L43/10 , H04L45/026 , H04L45/22 , H04L45/28 , H04L45/34 , H04L45/36
摘要： In one embodiment, a network device may receive an indication of a particular future message time, and determines a path validation time that is prior to the particular future message time by an amount at least long enough to detect and report a route change of a path from the network device to a source of the particular future message, wherein the source utilizes the path in reverse to reach the network device for the particular future message. Accordingly, the network device sends, at the path validation time, a keepalive message on the path, where in response to a failure of the keepalive message on the path, the network device repairs the path to the source with a particular route change, and reports the particular route change to the source, e.g., such that in response, the source may transmit the particular future message on the changed path in reverse.
摘要翻译：在一个实施例中，网络设备可以接收特定未来消息时间的指示，并且确定在特定未来消息时间之前的路径验证时间至少足够长的时间量以检测和报告路径的路由改变从网络设备到特定的未来消息的源，其中源使用相反的路径到达用于特定将来消息的网络设备。因此，网络设备在路径验证时间发送路径上的keepalive消息，响应于该路径上的keepalive消息的故障，网络设备以特定路由更改修复到源的路径，以及报告到源的特定路由更改，例如，作为响应，源可以相反地在改变的路径上发送特定的将来消息。

125. 发明授权

US08966113B2 Technique for dynamically restoring original TE-LSP attributes for interdomain TE-LSPs 有权
标题翻译：用于动态恢复域间TE-LSP的原始TE-LSP属性的技术
公开(公告)号：US08966113B2
公开(公告)日：2015-02-24
申请号：US11368160
申请日：2006-03-03
申请人： Jean-Philippe Vasseur , Carol Iturralde , George Swallow
发明人： Jean-Philippe Vasseur , Carol Iturralde , George Swallow
IPC分类号： G06F15/173 , H04L12/723 , H04L12/715 , G06F15/16
CPC分类号： H04L45/50 , H04L45/04
摘要： A technique dynamically restores original attributes of a Traffic Engineering Label Switched Path (TE-LSP) that are provided in a source domain for a destination domain when traversing one or more intermediate domains that may translate the TE-LSP attributes in a computer network. According to the novel technique, a head-end node requests an interdomain TE-LSP having one or more original TE-LSP attributes (e.g., priority, bandwidth, etc.) using a signaling exchange. The head-end node may also request restoration of the original TE-LSP attributes upon entrance into the destination domain. Intermediate domains (e.g., border routers of the domains) receiving the request may translate the original TE-LSP attributes into corresponding intermediate domain TE-LSP attributes. When the request reaches the destination domain, the intermediate domain TE-LSP attributes of the requested TE-LSP are restored into the original TE-LSP attributes.
摘要翻译：当遍历可能转换计算机网络中的TE-LSP属性的一个或多个中间域时，技术动态地恢复在目的地域的源域中提供的流量工程标签交换路径（TE LSP）的原始属性。根据该新技术，前端节点使用信令交换请求具有一个或多个原始TE-LSP属性（例如，优先级，带宽等）的域间TE-LSP。前端节点还可以在进入目的地域时请求恢复原始TE-LSP属性。接收请求的中间域（例如，域的边界路由器）可以将原始TE-LSP属性转换为相应的中间域TE-LSP属性。当请求到达目的域时，请求的TE-LSP的中间域TE-LSP属性恢复为原始TE-LSP属性。

126. 发明申请

US20150023326A1 Installation of Time Slots for Sending a Packet through an ARC Chain Topology Network 有权
标题翻译：安装通过ARC链拓扑网络发送数据包的时隙
公开(公告)号：US20150023326A1
公开(公告)日：2015-01-22
申请号：US14020930
申请日：2013-09-09
申请人： Pascal Thubert , Jean-Philippe Vasseur , Patrick Wetterwald
发明人： Pascal Thubert , Jean-Philippe Vasseur , Patrick Wetterwald
IPC分类号： H04J3/16
CPC分类号： H04W72/0446 , H04J3/1694 , H04L43/067 , H04L43/0876 , H04L45/32 , H04W40/023
摘要： One embodiment includes: determining, by a particular networked device, sending and receiving time slots for progressively communicating a particular packet among nodes of an arc of an Available Routing Construct (ARC) chain topology network in both directions on the arc to reach each edge node of the arc; and determining, by the particular networked device, for each edge node of the arc a predetermined respective time slot for communicating the particular packet to a respective child node on a second arc of the ARC chain topology network. One embodiment includes respectively installing said determined time slots in said nodes of the arc. In one embodiment, the network is a wireless deterministic network. In one embodiment, the predetermined respective time slot for each particular edge node is after all time slots in which the particular packet could be received by said particular edge node.
摘要翻译：一个实施例包括：由特定联网设备确定发送和接收时隙，用于在弧上的两个方向上的可用路由构造（ARC）链拓扑网络的弧的节点之间逐渐传送特定分组，以到达每个边缘节点的弧; 以及由所述特定网络设备为所述弧的每个边缘节点确定用于将所述特定分组传送到所述ARC链拓扑网络的第二弧上的相应子节点的预定相应时隙。一个实施例包括在电弧的所述节点中分别安装所述确定的时隙。在一个实施例中，网络是无线确定性网络。在一个实施例中，每个特定边缘节点的预定相应时隙在所有特定分组可被所述特定边缘节点接收的所有时隙之后。

127. 发明授权

US08934496B2 Reactive and proactive routing protocol interoperation in low power and lossy networks 有权
标题翻译：低功耗和有损网络中的无源和主动路由协议互操作
公开(公告)号：US08934496B2
公开(公告)日：2015-01-13
申请号：US13561716
申请日：2012-07-30
申请人： Jean-Philippe Vasseur
发明人： Jean-Philippe Vasseur
IPC分类号： H04L12/28 , H04L12/715
CPC分类号： H04L45/04 , H04W40/26 , H04W40/28 , H04W40/30 , Y02D70/00 , Y02D70/142 , Y02D70/144 , Y02D70/22
摘要： In one embodiment, a border node between a reactive routing network and a proactive routing network may receive an inter-domain route request (RREQ) from a requestor for a destination, and determines whether it knows the destination. In response to knowing the destination, the border node responds to the requestor. However, in response to not knowing the destination at the border node, when the border node is ingressing the inter-domain RREQ into the proactive routing network, it sends the inter-domain RREQ to each other border node of the proactive routing network. Alternatively, when the border node is ingressing the inter-domain RREQ into the reactive routing network, it sends the inter-domain RREQ into the reactive routing network.
摘要翻译：在一个实施例中，反应路由网络和主动路由网络之间的边界节点可以从目的地的请求者接收域间路由请求（RREQ），并且确定它是否知道目的地。响应于知道目的地，边界节点响应请求者。然而，响应于不知道边界节点的目的地，当边界节点将域间RREQ进入主动路由网络时，它将域间RREQ发送到主动路由网络的每个其他边界节点。或者，当边界节点将域间RREQ进入无功路由网络时，将域间RREQ发送到无功路由网络中。

128. 发明授权

US08861390B2 Estimated transmission overhead (ETO) metrics for variable data rate communication links 有权
标题翻译：可变数据速率通信链路的估计传输开销（ETO）度量
公开(公告)号：US08861390B2
公开(公告)日：2014-10-14
申请号：US13191617
申请日：2011-07-27
申请人： Jonathan W. Hui , Jean-Philippe Vasseur
发明人： Jonathan W. Hui , Jean-Philippe Vasseur
IPC分类号： H04Q11/00 , H04L12/825 , H04L12/753 , H04L12/801 , H04L12/721 , H04W84/18 , H04W4/00
CPC分类号： H04L47/25 , H04L45/123 , H04L45/48 , H04L47/34 , H04W4/38 , H04W84/18
摘要： In one embodiment, an expected transmission count (ETX) link metric is computed for a link between a transmitter and a receiver in a communication network, the ETX representative of an expected number of transmissions necessary for a message to be successfully received by the receiver over the link, and a data rate of the link at which the ETX is computed is also determined. From these, an estimated transmission overhead (ETO) link metric for the link may be computed by dividing the ETX by the data rate. In one embodiment, the data rate of the link may be adjusted based on the ETO (e.g., to minimize the ETO). In another embodiment, routes through the communication network may be selected based on ETO values along the route.
摘要翻译：在一个实施例中，为通信网络中的发射机和接收机之间的链路计算出期望的传输计数（ETX）链路量度，ETX表示接收机成功接收消息所需的预期传输次数链路以及计算ETX的链路的数据速率也被确定。由此可以通过将ETX除以数据速率来计算链路的估计传输开销（ETO）链路度量。在一个实施例中，可以基于ETO来调整链路的数据速率（例如，以最小化ETO）。在另一个实施例中，可以基于沿路由的ETO值来选择通过通信网络的路由。

129. 发明授权

US08842630B2 Extendable frequency hopping timeslots in wireless networks 有权
标题翻译：无线网络中可扩展的跳频时隙
公开(公告)号：US08842630B2
公开(公告)日：2014-09-23
申请号：US12971205
申请日：2010-12-17
申请人： Shmuel Shaffer , Sandeep Jay Shetty , Jean-Philippe Vasseur , Jonathan W. Hui
发明人： Shmuel Shaffer , Sandeep Jay Shetty , Jean-Philippe Vasseur , Jonathan W. Hui
IPC分类号： H04W4/00 , H04W72/04 , H04W84/18 , H04W28/06 , H04W72/00 , H04B1/713
CPC分类号： H04W72/0446 , H04B1/713 , H04W28/06 , H04W72/00 , H04W84/18
摘要： In one embodiment, a wireless transmitting node in a frequency hopping wireless network may determine whether a packet can be transmitted within a particular timeslot of a frequency hopping sequence based on a length of the packet. If unable to transmit the packet within the particular timeslot, the transmitting node extends the particular timeslot into a subsequent timeslot to allow transmission of the packet within the extended timeslot at a frequency associated with the particular timeslot. Once the extended timeslot ends, the transmitting node and receiving node hop frequencies into the subsequent timeslot to synchronize with the rest of the network that already hopped at the conventional rate. In another embodiment, a wireless receiving node may also extend the particular timeslot into a subsequent timeslot to allow reception of a packet that would extend beyond the particular timeslot, and may hop frequencies upon expiration of the extended timeslot.
摘要翻译：在一个实施例中，跳频无线网络中的无线发射节点可以基于分组的长度来确定是否可以在跳频序列的特定时隙内发送分组。如果不能在特定时隙内发送分组，则发送节点将特定时隙扩展到随后的时隙中，以允许以与特定时隙相关联的频率在扩展时隙内传输分组。一旦扩展时隙结束，发射节点和接收节点将频率跳到随后的时隙中，以与以常规速率跳过的网络的其余部分同步。在另一个实施例中，无线接收节点还可以将特定时隙扩展到随后的时隙中，以允许接收超出特定时隙的分组，并且可以在扩展时隙到期时跳频。

130. 发明授权

US08837277B2 Source routing convergence in constrained computer networks 有权
标题翻译：受限计算机网络中的源路由收敛
公开(公告)号：US08837277B2
公开(公告)日：2014-09-16
申请号：US13151109
申请日：2011-06-01
申请人： Jean-Philippe Vasseur , Jonathan W. Hui
发明人： Jean-Philippe Vasseur , Jonathan W. Hui
IPC分类号： H04L1/00 , H04L12/54 , H04L12/721
CPC分类号： H04L45/22 , H04L12/56 , H04L45/24 , H04L45/28 , H04L45/34 , H04L45/48 , H04W40/30
摘要： In one embodiment, a source routing device (e.g., root device) pre-computes diverse source-routed paths to one or more nodes in a computer network. Upon receiving a particular packet, the device forwards the particular packet on a source-routed first path of the pre-computed diverse paths. In the event the device implicitly detects failure of the first path, then it forwards a copy of the particular packet on a source-routed second path of the pre-computed diverse paths in response. In one embodiment, implicit failure detection comprises seeing a second (repeated) packet with the same identification within a certain time since the first packet, and the second packet is forwarded on the second path. In another embodiment, implicit failure detection comprises not seeing a link-layer acknowledgment returned or receiving an error notification from a node along the broken path, and a stored copy of the particular packet is forwarded on the second path.
摘要翻译：在一个实施例中，源路由设备（例如，根设备）预先计算到计算机网络中的一个或多个节点的不同的源路由路径。在接收到特定分组时，设备在预先计算的不同路径的源路由第一路径上转发特定分组。在设备隐含地检测到第一路径的故障的情况下，其响应地在预先计算的不同路径的源路由第二路径上转发特定分组的副本。在一个实施例中，隐含故障检测包括在自第一分组之后的特定时间内看到具有相同标识的第二（重复）分组，并且第二分组在第二路径上转发。在另一个实施例中，隐含故障检测包括没有看到返回的链路层确认或从断开的路径接收到来自节点的错误通知，并且特定分组的存储副本在第二路径上转发。

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