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公开(公告)号：US20210337493A1
公开(公告)日：2021-10-28
申请号：US17369770
申请日：2021-07-07
Applicant: Cisco Technology, Inc.
IPC: H04W56/00 , G06F16/901
Abstract: In one embodiment, a method comprises: receiving, by a constrained wireless network device comprising a local clock, a plurality of messages from respective neighboring wireless network devices advertising as available parent devices in a directed acyclic graph of a time-synchronized network that is synchronized to a master clock device; determining, by the constrained wireless network device, a corresponding timing error of the local clock relative to each message output by the corresponding available parent device; and executing, by the constrained wireless network device, a distributed time synchronization of the local clock with the master clock device based on correlating the respective timing errors relative to the local clock.
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公开(公告)号：US20210022098A1
公开(公告)日：2021-01-21
申请号：US16511321
申请日：2019-07-15
Applicant: Cisco Technology, Inc.
IPC: H04W56/00 , G06F16/901
Abstract: In one embodiment, a method comprises: receiving, by a constrained wireless network device comprising a local clock, a plurality of messages from respective neighboring wireless network devices advertising as available parent devices in a directed acyclic graph of a time-synchronized network that is synchronized to a master clock device; determining, by the constrained wireless network device, a corresponding timing error of the local clock relative to each message output by the corresponding available parent device; and executing, by the constrained wireless network device, a distributed time synchronization of the local clock with the master clock device based on correlating the respective timing errors relative to the local clock.
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3.发明申请公开(公告)号：US20170251468A1
公开(公告)日：2017-08-31
申请号：US15055690
申请日：2016-02-29
Applicant: Cisco Technology, Inc.
IPC: H04W72/04
CPC classification number: H04W72/0446 , H04W84/005 , H04W84/22
Abstract: In one embodiment, a method comprises determining a movable network device is moving along a repeatable sequence of access point devices in a deterministic network; and establishing a deterministic track along the repeatable sequence of access point devices, the deterministic track comprising insertion slots allocated for insertion of a data packet, by the movable network device, into the deterministic track via any one of the respective access point devices.
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4.发明申请公开(公告)号：US20170149472A1
公开(公告)日：2017-05-25
申请号：US14950459
申请日：2015-11-24
Applicant: Cisco Technology, Inc.
IPC: H04B1/7143 , H04W72/04
CPC classification number: H04B1/7143 , H04W72/0453
Abstract: In one embodiment, a method comprises: allocating, to each network device in a time slotted channel hopping network, a corresponding swapping schedule that maps the network device to different unique sequence offsets for different timeslots allocated to the corresponding network device, each unique sequence offset identifying a corresponding shifted position in a prescribed repeating channel hopping sequence relative to an epochal start of a linearly increasing timeslot value; and causing each network device to transmit according to its corresponding swapping schedule, enabling a channel hopping sequence of each network device to be undetectable relative to the prescribed repeating channel hopping sequence.
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公开(公告)号：US20230064808A1
公开(公告)日：2023-03-02
申请号：US17671712
申请日：2022-02-15
Applicant: Cisco Technology, Inc.
Inventor： PASCAL THUBERT , HUIMIN SHE , LI ZHAO , JEAN-PHILIPPE VASSEUR
IPC: H04W48/18 , H04W24/08 , H04W36/12 , H04L43/0876
Abstract: In one embodiment, a method comprises: first determining, by a controller, a target load for each of at least first and second wireless data networks rooted by respective first and second root network devices; second determining, by the controller, that at least a prescribed minimum number of network devices attached within the first wireless data network need to migrate from the first wireless data network to the second wireless data network based on the respective target loads; and causing, by the controller, the prescribed minimum number of network devices to migrate from the first wireless data network to the second wireless data network, based on the controller sending to the first and second root network devices enrollment priorities to be advertised by the first and second root network devices, respectively.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20200322951A1
公开(公告)日：2020-10-08
申请号：US16909811
申请日：2020-06-23
Applicant: Cisco Technology, Inc.
Abstract: In one embodiment, a method comprises determining a movable network device is moving along a repeatable sequence of access point devices in a deterministic network; and establishing a deterministic track along the repeatable sequence of access point devices, the deterministic track comprising insertion slots allocated for insertion of a data packet, by the movable network device, into the deterministic track via any one of the respective access point devices.
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公开(公告)号：US20180146413A1
公开(公告)日：2018-05-24
申请号：US15359739
申请日：2016-11-23
Applicant: Cisco Technology, Inc.
CPC classification number: H04L45/14 , H04L45/20 , H04L45/34 , H04L69/22 , H04W84/18 , Y02D70/00 , Y02D70/144
Abstract: In one embodiment, a method comprises promiscuously detecting, by a network device in a wireless data network, a wireless data packet comprising a source route header specifying a hop-by-hop path for reaching a destination device in the wireless data network; determining, by the network device, that the network device is identified in the hop-by-hop path as following a first next-hop device targeted for reception of the wireless data packet; and executing intercepted forwarding of the wireless data packet, by the network device, to a second next-hop device successively following the network device in the hop-by-hop path.
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公开(公告)号：US20170222920A1
公开(公告)日：2017-08-03
申请号：US15271811
申请日：2016-09-21
Applicant: Cisco Technology, Inc.
Inventor： PASCAL THUBERT , JEAN-PHILIPPE VASSEUR , PATRICK WETTERWALD , IJSBRAND WIJNANDS
IPC: H04L12/721 , H04L29/06
Abstract: In one embodiment, a method comprises receiving, by a network device in a deterministic data network comprising deterministic segments, a data packet comprising a packet header having a bit index, each bit in the bit index associated with a corresponding one of the deterministic segments; the network device identifying, from the bit index, a first bit for a corresponding first deterministic segment and a second bit for a corresponding second deterministic segment, wherein the network device is an endpoint for transmitting deterministic traffic into each of the first and second deterministic segments; the network device selectively executing a replication operation of the data packet for transmission of a replicated data packet into each of the first and second deterministic segments, based on the network device detecting the corresponding first and second bits set for replication.
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9.发明申请公开(公告)号：US20200336406A1
公开(公告)日：2020-10-22
申请号：US16919793
申请日：2020-07-02
Applicant: Cisco Technology, Inc.
IPC: H04L12/751 , H04L12/717
Abstract: In one embodiment, a method comprises identifying, by a path computation element, essential parent devices from a nonstoring destination oriented directed acyclic graph (DODAG) topology as dominating set members belonging to a dominating set; receiving, by the path computation element, an advertisement message specifying a first dominating set member having reachability to a second dominating set member, the reachability distinct from the nonstoring DODAG topology; and generating, by the path computation element based on the advertisement message, an optimized path for reaching a destination network device in the nonstoring DODAG topology via a selected sequence of dominating set members, the optimized path providing cut-through optimization across the nonstoring DODAG topology.
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公开(公告)号：US20200084135A1
公开(公告)日：2020-03-12
申请号：US16126859
申请日：2018-09-10
Applicant: Cisco Technology, Inc.
IPC: H04L12/751 , H04L12/707 , H04L12/761 , H04L12/703 , H04L12/721 , H04L12/933 , H04L12/46
Abstract: In one embodiment, a method comprises generating a switched link layer topology from a source device to a destination device, the switched link layer topology comprising a first sequence of switching devices, a second sequence of switching devices, and one or more bridging links between the first and second sequences of switching devices; generating first and second chains of resilient link layer segments for respective first and second multi-hop link layer connections based on generating a sequence of link layer loops overlying the switched link layer topology, and setting for each of the first and second multi-hop link layer connections a corresponding set of connection blocks in each link layer loop; and causing replication of a data packet across the first and second multi-hop link layer connections, enabling a failure in the switched link layer topology to be bypassed based on removing at least one of the connection blocks.
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