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：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：US10917196B2

公开(公告)日：2021-02-09

申请号：US16273251

申请日：2019-02-12

Applicant: Cisco Technology, Inc.

Inventor： Wenjia Wu ,  Nan Yi ,  Huimin She ,  Chuanwei Li

IPC: H04L1/00 ,  H04L29/06 ,  H04L5/00 ,  H04L1/16 ,  H04W28/06 ,  H04W80/02 ,  H04L29/08 ,  H04W72/04 ,  H04L12/723

Abstract: In one embodiment, a device in a network determines that a plurality of packets should be aggregated, each of the plurality of packets comprising a payload. The device generates, for each of the payloads, a sub-media access control (sub-MAC) header that comprises a sequence number and a frame check sequence (FCS). The device forms an aggregated packet that comprises a physical layer (PHY) header, a MAC header, the payloads, and the generated sub-MAC headers for the payloads. The device sends the aggregated packet to another device in the network.

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.