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    Concurrent network reformation for low-power and lossy networks
    1.
    发明授权
    Concurrent network reformation for low-power and lossy networks 有权

    公开(公告)号：US10904097B2

    公开(公告)日：2021-01-26

    申请号：US16353137

    申请日：2019-03-14

    Applicant: Cisco Technology, Inc.

    Inventor： Huimin She ,  Li Zhao ,  Nan Yi ,  Haibo Dong

    IPC: H04L12/24 ,  H04L12/44 ,  H04L12/703 ,  H04L29/12 ,  H04L12/751

    Abstract: In one embodiment, a device in a mesh network rooted at a root node receives a subroot selection notification. The subroot selection notification indicates that the device should function as a root of a sub-directed acyclic graph (DAG) were a power outage to occur. The device determines that a power outage has occurred. The device forms, after determining that a power outage has occurred, a sub-DAG that is rooted at the device by establishing one or more other devices in the mesh network as routing children of the device in the sub-DAG. The device joins the sub-DAG to a DAG rooted at the root node.

    Collision processing for message retransmission
    2.
    发明授权
    Collision processing for message retransmission 有权

    公开(公告)号：US10462821B2

    公开(公告)日：2019-10-29

    申请号：US15905647

    申请日：2018-02-26

    Applicant: Cisco Technology, Inc.

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

    IPC: H04W74/08

    Abstract: A computer-implemented method of determining backoff windows in a wireless computer network is disclosed. The method comprises defining, by an access point in the wireless computer network, a plurality of collision patterns related to message transmission via one or more communication channels in the wireless computer network; detecting, by the access point, occurrence of one of the plurality of collision patterns involving a group of sender nodes in the wireless computer network that have each transmitted a message to the access point and received no acknowledgement message from the access point indicating successful transmission; setting to a first length a length of a backoff window for avoiding collision in data transmission based on a size of the group of sender nodes; sending a first message to a first plurality of nodes in the wireless computer network, the first message instructing performance of backoff during the backoff window having the first length.

    EFFICIENT TRANSMISSION OF SMALL PACKETS IN LOW POWER AND LOSSY NETWORKS
    3.
    发明申请
    EFFICIENT TRANSMISSION OF SMALL PACKETS IN LOW POWER AND LOSSY NETWORKS 审中-公开

    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.

    Interconnecting local RPL instance nodes via global RPL instance node as AODV relay
    6.
    发明授权
    Interconnecting local RPL instance nodes via global RPL instance node as AODV relay 有权

    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.

    CONCURRENT NETWORK REFORMATION FOR LOW-POWER AND LOSSY NETWORKS
    7.
    发明申请
    CONCURRENT NETWORK REFORMATION FOR LOW-POWER AND LOSSY NETWORKS 审中-公开

    公开(公告)号：US20200296001A1

    公开(公告)日：2020-09-17

    申请号：US16353137

    申请日：2019-03-14

    Applicant: Cisco Technology, Inc.

    Inventor： Huimin She ,  Li Zhao ,  Nan Yi ,  Haibo Dong

    IPC: H04L12/24 ,  H04L12/751 ,  H04L12/703 ,  H04L29/12 ,  H04L12/44

    Abstract: In one embodiment, a device in a mesh network rooted at a root node receives a subroot selection notification. The subroot selection notification indicates that the device should function as a root of a sub-directed acyclic graph (DAG) were a power outage to occur. The device determines that a power outage has occurred. The device forms, after determining that a power outage has occurred, a sub-DAG that is rooted at the device by establishing one or more other devices in the mesh network as routing children of the device in the sub-DAG. The device joins the sub-DAG to a DAG rooted at the root node.

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