公开(公告)号：US10931399B2

公开(公告)日：2021-02-23

申请号：US16289859

申请日：2019-03-01

Applicant: Cisco Technology, Inc.

Inventor： Lele Zhang ,  Huimin She ,  Chuanwei Li ,  Nan Yi

IPC: G01R31/08 ,  G06F11/08 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26 ,  H04W74/08 ,  H04L12/44

Abstract: In one embodiment, a method comprises determining, by a network device in a wireless data network, that a prescribed Clear Channel Assessment (CCA) threshold is unsuitable for use on an identified wireless network channel among available wireless network channels, based on a determined variance of a corresponding channel transmit attempt failure rate for the identified wireless network channel, relative to an expected variance in channel transmit attempt failure rates that is determined across the respective available wireless network channels; and selectively adjusting the corresponding CCA threshold for the identified wireless network channel, until a second determined variance of the corresponding channel transmit attempt failure rate, at the identified wireless network channel, falls below a prescribed channel failure rate variance factor relative to the expected variance.

公开(公告)号：US12267682B2

公开(公告)日：2025-04-01

申请号：US18353772

申请日：2023-07-17

Applicant: Cisco Technology, Inc.

Inventor： Lele Zhang ,  Yajun Xia ,  Chuanwei Li ,  Li Zhao

IPC: H04W12/122 ,  G16Y30/10 ,  H04L9/40 ,  H04L43/0829 ,  H04L43/16 ,  H04W4/70 ,  H04W24/08 ,  H04W64/00 ,  H04W84/18

Abstract: A method includes determining a number of drops of a plurality of messages sent to a first node of a plurality of nodes within a mesh network. Based at least in part on the number of drops of the plurality of messages exceeding a threshold number of drops for a time period, decrementing a first rating assigned to the first node to a second rating assigned to the first node. Based at least in part on the second rating being below a rating threshold, determining that the first node is a potentially malicious node. Based at least in part on a first distance to the first node being larger than a distance threshold, identifying that the first node is a malicious node. The method may further include ending communications with the first node.

公开(公告)号：US11431518B2

公开(公告)日：2022-08-30

申请号：US16789862

申请日：2020-02-13

Applicant: Cisco Technology, Inc.

Inventor： Pascal Thubert ,  Huimin She ,  Chuanwei Li ,  Lele Zhang

IPC: H04L12/18 ,  H04L12/46 ,  H04L45/00 ,  H04L1/08

Abstract: In one embodiment, a method comprises: identifying, by a low power and lossy network (LLN) device in a low power and lossy network, a minimum distance value and a distance limit value for limiting multicast propagation, initiated at the LLN device, of a multicast data message in the LLN; and multicast transmitting, by the LLN device, the multicast data message with a current distance field specifying the minimum distance value and a distance limit field specifying the distance limit value, the multicast transmitting causing a receiving LLN device having a corresponding rank in the LLN to respond to the multicast data message by: (1) determining an updated distance based on adding to the current distance field a rank difference between the receiving LLN device and the LLN device, and (2) selectively retransmitting the multicast data message if the updated distance is less than the distance limit value.

公开(公告)号：US11362937B2

公开(公告)日：2022-06-14

申请号：US16825171

申请日：2020-03-20

Applicant: Cisco Technology, Inc.

Inventor： Huimin She ,  Lele Zhang ,  Shiwei Gao ,  Xiaoguang Jason Chen ,  Chuanwei Li

IPC: G06F15/173 ,  H04L45/00 ,  H04L41/0816 ,  H04L45/02

Abstract: Techniques for utilizing Software-Defined Field-Area Network (SD-FAN) controllers to receive a geographic location and transmission power of individual nodes and generate a geographic location topology of a Field-Area Network (FAN) to provide nodes with location-aware route paths for data transmission. One or more SD-FAN controller(s) may maintain a geographic location database to store the geographic location and transmission power of the individual nodes. Each node may utilize a Destination Address Object to advertise its geographic location and transmission power to the SD-FAN controller. The SD-FAN controller(s) may utilize the geographic location table to generate the geographic location topology of the FAN and determine a location-aware route path for optimized data transmission between nodes in the FAN.

公开(公告)号：US20210377157A1

公开(公告)日：2021-12-02

申请号：US16890241

申请日：2020-06-02

Applicant: Cisco Technology, Inc.

Inventor： Li Zhao ,  Chuanwei Li ,  Lele Zhang ,  Haibo Dong ,  Akram Ismail Sheriff

IPC: H04L12/707 ,  H04L12/751 ,  H04W28/10 ,  H04L12/803

Abstract: Techniques for distributed sub-controller permission for control of data-traffic flow within software-defined networking (SDN) mesh networks to limit control plane traffic of the network are described herein. A technique described herein includes a network node of a data-traffic path of an SDN mesh network obtaining SDN sub-controller permission from a border controller of the SDN mesh network. Further, the technique includes suppression of data traffic from sibling and children nodes of data-traffic path allied nodes to the data-traffic path allied nodes. The data-traffic path allied nodes include network nodes that are part of the data-traffic path of the SDN mesh network. Further still, the technique includes the transmission of data across the data-traffic path.

公开(公告)号：US10932195B1

公开(公告)日：2021-02-23

申请号：US16574295

申请日：2019-09-18

Applicant: Cisco Technology, Inc.

Inventor： Lele Zhang ,  Ling Wei ,  Xi Wu ,  Tonglin Yuan

IPC: H04W8/00 ,  H04W52/02 ,  H04W84/18 ,  H04W40/24

Abstract: In one embodiment, a method comprises: generating and storing, by a parent device in a low power lossy network (LLN), first state variables associated with a first execution state of an attached child during an active state of the child; determining a request, received by the parent device, is destined for the child and specifying a second execution state to be executed by the child; selectively updating, by the parent device, the first state variables with second state variables associated with the second execution state identifying an updated execution state for the child; detecting, by the parent device, that the child has transitioned from a sleep state to a second active state, and in response generating an instruction based on the second state variables; and transmitting the instruction to the child during the second active state, causing the child to execute the second execution state.

公开(公告)号：US20210029038A1

公开(公告)日：2021-01-28

申请号：US16518130

申请日：2019-07-22

Applicant: Cisco Technology, Inc.

Inventor： Lele Zhang ,  Chuanwei Li ,  Li Zhao ,  Yajun Xia

IPC: H04L12/803 ,  H04L12/24 ,  H04L12/753 ,  H04L12/721 ,  H04L12/26 ,  G06N20/00

Abstract: In one embodiment, a technique for load balancing of throughput for multi-PHY networks using decision trees is provided. A first device of a mesh communication network may collect at least one transmission metric indicative of a primary link and a secondary link between the first device and a second device of the mesh communication network. The first device may provide the at least one transmission metric as input to one or more decision trees comprising one or more attributes that are each indicative of a threshold for a corresponding transmission metric. The first device may obtain an output from the decision tree comprising a selection of either the primary link or the secondary link. The first device may send, based on the output from the decision tree, one or more packets to the second device using the selected link.