公开(公告)号：US20220038360A1

公开(公告)日：2022-02-03

申请号：US17410015

申请日：2021-08-24

Applicant: Cisco Technology, Inc.

Inventor： Yinfang Wang ,  Yajun Xia ,  Feiliang Wang ,  Chuanwei Li

IPC: H04L12/26 ,  H04L12/18 ,  H04B3/54 ,  H04W72/12

Abstract: In one embodiment, a technique comprises monitoring data transfer over a radio frequency (RF) link between a first device and a second device in a mesh network where the second device is a descendent node and the first device is a parent node. The technique further transfers the data over a power link communication (PLC) when the RF link is inactive. The method also includes broadcasting, by the second device, RF link availability to at least a third device in the mesh network when the RF link with the first device is inactive where the third device has an active link with the second device and the third device is a descendent node of the second device. The method then includes communicating, between the second device and the third device, through the active RF link.

公开(公告)号：US20200259736A1

公开(公告)日：2020-08-13

申请号：US16274979

申请日：2019-02-13

Applicant: Cisco Technology, Inc.

Inventor： Huimin She ,  Feiliang Wang ,  Li Zhao ,  Chuanwei Li

IPC: H04L12/733 ,  H04L12/751 ,  H04L12/44 ,  H04L29/08 ,  H04L12/24

Abstract: In one embodiment, a method comprises determining, by a network device, a hop-by-hop path in a low-power and lossy network having a tree-based topology originated at a root network device, the hop-by-hop path comprising identified network devices for forwarding a data packet from a source network device to a destination device in the tree-based topology; and causing, by the network device, the destination device to initiate generation of a locally-optimized tree that bypasses the root network device and optimizes forwarding of the data packet from the source network device to the destination device, based on confined advertisements within the tree-based topology relative to the identified network devices.

公开(公告)号：US20190334644A1

公开(公告)日：2019-10-31

申请号：US15962053

申请日：2018-04-25

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Huimin She ,  Patrick Wetterwald ,  Feiliang Wang

IPC: H04J3/24 ,  H04L29/08 ,  H04B1/713

Abstract: In one embodiment, a device receives data indicative of a routing topology of a network. The network includes a root node and each node in the network has an associated network depth relative to the root. The device selects a first subset of timeslots from a slotframe of a communication schedule based on the network depth of a particular node in the network. The device selects a second subset of timeslots from the first subset, based on a media access control (MAC) address of the particular node. The device assigns the second subset of timeslots to the particular node for reception in the slotframe of the communication schedule. The device sends the communication schedule to one or more nodes in the network.

公开(公告)号：US12149548B2

公开(公告)日：2024-11-19

申请号：US17515014

申请日：2021-10-29

Applicant: Cisco Technology, Inc.

Inventor： Lele Zhang ,  Li Zhao ,  Chuanwei Li ,  Feiliang Wang

IPC: H04L9/40 ,  G06F18/214 ,  G06N20/00 ,  H04L45/00 ,  H04L45/02 ,  H04W12/121 ,  H04W12/00

Abstract: The present disclosure provides a hierarchical method of identifying unauthorized network traffic in a network by applying, at one of a first plurality of nodes of a network, a first level of network traffic analysis to identify received network traffic as one of authorized or suspicious network traffic, the one of the first plurality of nodes having a first path for traffic routing and a second path to one of a second plurality of nodes of the network, the second path being used for forwarding the suspicious network traffic to the one of the second plurality of nodes; tagging the received network traffic as the suspicious network traffic; and sending the suspicious network traffic to the one of the second plurality of nodes over the second path, the second network node applying a second level of network analysis to determine if the received network traffic is authorized, unauthorized or remains suspicious.

公开(公告)号：US11159409B2

公开(公告)日：2021-10-26

申请号：US16419124

申请日：2019-05-22

Applicant: Cisco Technology, Inc.

Inventor： Lele Zhang ,  Li Zhao ,  Chuanwei Li ,  Feiliang Wang

IPC: H04L12/26 ,  H04W84/18 ,  H04L12/751 ,  H04L12/24 ,  H04W4/06

Abstract: In one embodiment, a method comprises: determining, by a network device in a wireless data network, a past throughput of broadcast data packets transmitted at broadcast transmission intervals of a prescribed broadcast schedule over a selected measurement interval, the broadcast transmission intervals each adjacent to unicast transmission intervals allocated in the wireless data network, each of the broadcast transmission intervals in the prescribed broadcast schedule initially set at a prescribed duration; predicting, by the network device, a predicted throughput of a future broadcast transmission interval of the prescribed broadcast schedule, for transmission of at least a future broadcast data packet, based on executing a trendline prediction of the predicted throughput using the past throughput over the selected measurement interval; and adjusting the corresponding prescribed duration of the future broadcast transmission interval, relative to the corresponding adjacent unicast transmission interval following the future broadcast transmission interval, based on the predicted throughput.

公开(公告)号：US11128554B1

公开(公告)日：2021-09-21

申请号：US16265046

申请日：2019-02-01

Applicant: Cisco Technology, Inc.

Inventor： Yinfang Wang ,  Yajun Xia ,  Feiliang Wang ,  Chuanwei Li

IPC: H04L12/26 ,  H04B3/54 ,  H04L12/18 ,  H04W72/12 ,  H04W84/18

Abstract: In one embodiment, a technique comprises monitoring data transfer over a radio frequency (RF) link between a first device and a second device in a mesh network where the second device is a descendent node and the first device is a parent node. The technique further transfers the data over a power link communication (PLC) when the RF link is inactive. The method also includes broadcasting, by the second device, RF link availability to at least a third device in the mesh network when the RF link with the first device is inactive where the third device has an active link with the second device and the third device is a descendent node of the second device. The method then includes communicating, between the second device and the third device, through the active RF link.

公开(公告)号：US20200229246A1

公开(公告)日：2020-07-16

申请号：US16246953

申请日：2019-01-14

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Feiliang Wang ,  Huimin She ,  Patrick Wetterwald

IPC: H04W74/08 ,  H04W74/00 ,  H04W56/00

Abstract: In one embodiment, a parent device in an unaligned wireless network may determine a superframe comprising a header timeslot followed by a plurality of sub timeslots. The parent device may transmit, to a plurality of child devices in the unaligned wireless network, a beacon during the header timeslot, wherein the beacon comprises i) synchronization information used by the plurality of child devices to synchronize to the header timeslot and ii) reservation information that indicates one or more reserved sub timeslots of the plurality of sub timeslots. The parent device may receive, from a particular child device of the plurality of child devices, a message during a particular sub timeslot of the plurality of sub timeslots that is different than the one or more reserved sub timeslots.