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公开(公告)号：US10715422B2
公开(公告)日：2020-07-14
申请号：US16026203
申请日：2018-07-03
Applicant: Cisco Technology, Inc.
Inventor： Pascal Thubert , Jianzhou Chen , Huimin She , Patrick Wetterwald
IPC: H04L12/761 , H04L12/753 , H04L12/705 , H04L12/751 , H04L12/703 , H04W28/02 , H04L12/26 , H04W24/04
Abstract: In one embodiment, a parent network device, operating according to a first Trickle operation using a first selected minimum contention interval, responds to detecting a loss of attached child network devices by starting a second Trickle operation using a second selected minimum contention interval. The second Trickle operation includes maintaining the second selected minimum contention interval for subsequent iterations of the second Trickle operation. The parent network device initiates an accelerated transmission rate of the advertisement message that is faster than the first and second Trickle operations (using a third selected minimum contention interval less than the first minimum contention interval) in response to receiving a message from one of the lost child network devices, and resumes the first Trickle operation upon recovery of all the lost child network devices.
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公开(公告)号：US10652135B2
公开(公告)日：2020-05-12
申请号：US15216007
申请日：2016-07-21
Applicant: Cisco Technology, Inc.
Inventor： Pascal Thubert , IJsbrand Wijnands , Patrick Wetterwald , Eric Levy-Abegnoli , Jean-Philippe Vasseur
IPC: H04L12/727 , H04L12/753 , H04L12/751 , H04L12/721 , H04L29/06 , H04L12/725
Abstract: In one embodiment, a multicast listener device floods a path lookup request to search for a multicast tree, and may then receive path lookup responses from candidate nodes on the multicast tree, where each of the path lookup responses indicates a unicast routing cost from a respective candidate node to the multicast listener device, and where each of the candidate nodes is configured to suppress a path lookup response if a total path latency from a source of the multicast tree to the multicast listener device via that respective candidate node is greater than a maximum allowable path latency. The multicast listener device may then select a particular candidate node as a join point for the multicast tree based on the particular node having a lowest associated unicast routing cost to the multicast listener device from among the candidate nodes, and joins the multicast tree at the selected join point.
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23.发明授权公开(公告)号：US10567267B2
公开(公告)日：2020-02-18
申请号：US15642657
申请日：2017-07-06
Applicant: Cisco Technology, Inc.
IPC: H04L12/751 , H04W24/02
Abstract: In one embodiment, a method comprises: determining access point devices providing network coverage for a mobile network device within a prescribed coverage area of a deterministic network; establishing a deterministic reception tree comprising a root and switching devices associated with the access point devices, the deterministic reception tree enabling any one or more of the switching devices to forward toward the root a data packet, transmitted by the mobile network device at a prescribed transmission time, for deterministic reception by the root at a prescribed reception time regardless of any distance of any of the access point devices from the root; and causing the switching devices to implement the deterministic reception tree enabling the root to deterministically receive the data packet, received by any one or more of the access point devices, at the prescribed reception time.
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公开(公告)号：US10425310B2
公开(公告)日：2019-09-24
申请号：US14757525
申请日：2015-12-23
Applicant: Cisco Technology, Inc.
Abstract: In one embodiment, a method comprises: a network device, having attached to a first parent device in a tree-based network topology, attaching to a second parent device advertising better network performance than the first parent device; and the network device detaching from the second parent device, and reattaching to the first parent device, in response to the network device determining the corresponding network performance via the second parent device is worse than any one of the advertised better network performance, the corresponding network performance via the first parent device, or an expected network performance via the second network device.
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公开(公告)号：US10348481B1
公开(公告)日：2019-07-09
申请号：US15966131
申请日：2018-04-30
Applicant: Cisco Technology, Inc.
Inventor： Patrick Wetterwald , Pascal Thubert , Eric Levy-Abegnoli
IPC: H04L7/00
Abstract: In one embodiment, a device in a network receives a plurality of packets from one or more neighbors of the device. Each of the packets has a scheduled delivery time interval according to a deterministic communication schedule. The device determines an amount of clock drift for each of the one or more neighbors of the device by comparing arrival times of the received packets to their scheduled delivery time intervals according to the deterministic communication schedule. The device calculates a clock adjustment based on the amount of clock drift for each of the one or more neighbors. The device adjusts a clock of the device using the calculated clock adjustment.
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Patent Agency Ranking
公开(公告)号：US10320659B2
公开(公告)日：2019-06-11
申请号：US15361563
申请日：2016-11-28
Applicant: Cisco Technology, Inc.
Inventor： Patrick Wetterwald , Pascal Thubert , Eric Michel Levy-Abegnoli
IPC: H04L12/721 , H04W40/04
Abstract: In one embodiment, a method comprises receiving, by a network device in a deterministic data network, one or more deterministic schedules for reaching a destination network device along one or more deterministic paths in the deterministic data network; generating, by the network device, a deterministic source-route path for reaching the destination network device based on the deterministic schedules allocated for the deterministic paths, the deterministic source-route path comprising, for each specified hop, a corresponding deterministic start time; and outputting, by the network device, a source routed deterministic packet comprising the deterministic source-route path for deterministic forwarding of the source routed deterministic packet to the destination network device.
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公开(公告)号：US10244525B2
公开(公告)日：2019-03-26
申请号：US15009872
申请日：2016-01-29
Applicant: Cisco Technology, Inc.
IPC: H04W72/04 , H04L12/44 , H04L12/24 , H04L5/00 , H04L12/751
Abstract: In one embodiment, a method comprises: promiscuously detecting, by a parent network device in a tree-based network topology, a data packet transmitted to a child network device attached to the parent network device, the data packet transmitted by a grandchild network device attached to the child network device; determining, by the parent network device, whether the data packet transmitted to the child network device is to be forwarded toward a destination via the parent network device; and the parent network device selectively initiating intercepted forwarding of the data packet toward the destination, on behalf of the child network device, based on determining that the data packet is to be forwarded toward the destination via the parent network device.
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公开(公告)号：US10243926B2
公开(公告)日：2019-03-26
申请号：US15094177
申请日：2016-04-08
Applicant: Cisco Technology, Inc.
Inventor： Pascal Thubert , Xuechen Yang , Rudolph B. Klecka, III , Patrick Wetterwald , Eric Levy-Abegnoli
Abstract: In one embodiment, a virtual firewall is installed on a port of a device that communicates across a zone boundary within an industrial network. The virtual firewall is then configured based on operation of the industrial network, such that the port may then communicate via the firewall to a remote virtual firewall of a remote port of a remote device across the zone boundary.
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公开(公告)号：US10225789B2
公开(公告)日：2019-03-05
申请号：US15491203
申请日：2017-04-19
Applicant: Cisco Technology, Inc.
Inventor： Pascal Thubert , Jean-Philippe Vasseur , Patrick Wetterwald , Eric Levy-Abegnoli
Abstract: In one embodiment, a supervisory device in a network receives from a plurality of access points (APs) in the network data regarding a network availability request broadcast by a node seeking to access the network and received by the APs in the plurality. The supervisory device uniquely associates the node with a virtual access point (VAP) for the node and forms a VAP mapping between the VAP for the node and a set of the APs in the plurality selected based on the received data regarding the network availability request. One of the APs in the mapping is designated as a primary access point for the node. The supervisory device instructs the primary AP to send a network availability response to the node that includes information for the VAP. The node uses the information for the VAP to access the network via the set of APs in the VAP mapping.
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公开(公告)号：US10212182B2
公开(公告)日：2019-02-19
申请号：US15485680
申请日：2017-04-12
Applicant: Cisco Technology, Inc.
Inventor： Patrick Wetterwald , Pascal Thubert , Jean-Philippe Vasseur , Eric Levy-Abegnoli
Abstract: In one embodiment, a server instructs one or more networking devices in a local area network (LAN) to form virtual network overlay in the LAN that redirects traffic associated with a particular node in the LAN to the server. The server receives the redirected traffic associated with the particular node. The server determines a node profile for the particular node based in part on an analysis of the redirected traffic. The server configures the particular node based on the determined node profile for the particular node.
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