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：US10904778B1

公开(公告)日：2021-01-26

申请号：US16808887

申请日：2020-03-04

Applicant: Cisco Technology, Inc.

Inventor： Lele Zhang ,  Akram Ismail Sheriff ,  Chuanwei Li ,  Wenjia Wu

IPC: H04M11/04 ,  H04W24/04 ,  H04W4/12 ,  H04W40/22 ,  G06F1/30 ,  G06N20/00 ,  H04W8/00 ,  H04W40/24 ,  H04W84/18 ,  G06Q50/06

Abstract: Techniques and mechanisms for detecting and deducing of urgent messages in low-power and lossy networks (LLNs) using a correlation analysis of the nodes within a network and machine learning (ML) models. Utilizing these techniques, a field network director (FND) of the network can determine neighboring devices within the network. ML models may be utilized to determine that based upon receipt of a power outage notification (PON) message and/or a power restoration notification (PRN) message from nodes, neighboring nodes of the nodes may also have suffered a power outage and/or a subsequent power restoration, even if the FND did not receive a corresponding PON message and/or a corresponding PRN message from the neighboring nodes of the network. Thus, loss of power and subsequent power restoration may be handled for large numbers of neighboring nodes within the network, even when only a few PON messages and/or subsequent PRN messages are received.

公开(公告)号：US20200259592A1

公开(公告)日：2020-08-13

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

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：US11463350B2

公开(公告)日：2022-10-04

申请号：US17102003

申请日：2020-11-23

Applicant: Cisco Technology, Inc.

Inventor： Ling Wei ,  Wenjia Wu ,  Nan Yi ,  Chuanwei Li

IPC: H04L12/28 ,  H04L45/30 ,  H04L12/46 ,  H04L12/18

Abstract: In one embodiment, a method comprises: determining, by a network device that is configured for joining a local directed acyclic graph (DAG) instance in a data network, an unreachability by the network device to any member of the local DAG instance; generating and broadcasting, by the network device, a request message that identifies the network device requesting to join the local DAG instance, the request message causing a neighboring network device in a global DAG instance of the data network to rebroadcast the request message for reception by a member of the local DAG instance, the neighboring network device a non-member of the local DAG instance; and receiving, by the network device, a reply message indicating a member of the local DAG instance is reachable via the neighboring network device in the global DAG instance.