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    ELIMINATING SATURATION ENCOUNTERED BY RPL STORING MODE PARENT NETWORK DEVICE
    21.
    发明申请
    ELIMINATING SATURATION ENCOUNTERED BY RPL STORING MODE PARENT NETWORK DEVICE 审中-公开

    公开(公告)号：US20200344159A1

    公开(公告)日：2020-10-29

    申请号：US16397124

    申请日：2019-04-29

    Applicant: Cisco Technology, Inc.

    Inventor： PASCAL THUBERT ,  HUIMIN SHE ,  PATRICK WETTERWALD ,  LI ZHAO

    IPC: H04L12/753 ,  H04L29/08

    Abstract: In one embodiment, a method comprises attaching, by a constrained network device in a data network, to a first parent network device in a tree-based storing mode topology in response to receiving a first advertisement message generated by the first parent network device; outputting to the first parent network device a plurality of routes stored in the constrained network device, the routes identifying destinations reachable via the constrained network device; determining, by the constrained network device, that the first parent network device is encountering saturation of stored routes based on the constrained network device receiving a second advertisement message from the first parent network device; and eliminating, by the constrained network device, the saturation encountered by the first parent network device based on moving at least a portion of the routes from the first parent network device to a second parent network device in the tree-based storing mode topology.

    REDUNDANT MULTICAST TREE IN A FAT TREE NETWORK TOPOLOGY WITH ANISOTROPIC ROUTING
    22.
    发明申请
    REDUNDANT MULTICAST TREE IN A FAT TREE NETWORK TOPOLOGY WITH ANISOTROPIC ROUTING 审中-公开

    公开(公告)号：US20200259679A1

    公开(公告)日：2020-08-13

    申请号：US16747157

    申请日：2020-01-20

    Applicant: Cisco Technology, Inc.

    Inventor： PASCAL THUBERT ,  PATRICK WETTERWALD ,  ERIC MICHEL LEVY-ABEGNOLI

    IPC: H04L12/44 ,  H04L12/18 ,  H04L12/64 ,  H04L12/721 ,  H04L12/751

    Abstract: In one embodiment, a method comprises identifying a fat tree network topology comprising top-of-fabric (ToF) switching devices, an intermediate layer of intermediate switching devices connected to each of the ToF switching devices, and a layer of leaf network devices; and causing a first leaf network device to initiate establishment of first and second redundant multicast trees for multicasting of data packets, including: causing first and second ToF switching devices to operate as roots of the first and second multicast trees according to first and second attribute types, respectively, causing the first leaf network device to select first and second of the intermediate switching devices as first and second flooding relays belonging to the first and second attribute types, respectively, and causing the first and second flooding relays to limit propagation of registration messages generated by the first leaf network device to the first and second ToF switching devices, respectively.

    RELIABLE LINK LAYER MULTICAST IN A LOW POWER WIDE AREA NETWORK
    23.
    发明申请
    RELIABLE LINK LAYER MULTICAST IN A LOW POWER WIDE AREA NETWORK 审中-公开

    公开(公告)号：US20190261138A1

    公开(公告)日：2019-08-22

    申请号：US15902028

    申请日：2018-02-22

    Applicant: Cisco Technology, Inc.

    Inventor： PASCAL THUBERT ,  PATRICK WETTERWALD ,  PAUL B. DUFFY ,  PATRICK GROSSETETE

    IPC: H04W4/06 ,  H04W74/08 ,  H04L1/16 ,  H04W72/00

    Abstract: A management device for a low power wide area network can: generate and send, to each constrained wireless network device via a wired gateway, a link layer multicast listener command specifying a listening interval and causing each constrained wireless network device to change from a low-power optimized mode to a listening mode until reception of a multicast data packet within the listening interval; generate collision avoidance parameters including a minimum waiting interval, a maximum waiting interval relative to the listening interval, and a redundancy constant; and instruct the wired gateways to selectively transmit the multicast data packet based on the collision avoidance parameters, wherein each wired gateway responds by waiting a randomly-selected wait interval between the minimum and maximum waiting intervals, and selectively transmitting the multicast data packet only if a received number of the multicast data packet by the corresponding wired gateway is less than the redundancy constant.

    DETERMINISTIC DATA COLLECTION FROM MOBILE NETWORK DEVICE TRAVELING WITHIN A DETERMINISTIC NETWORK
    26.
    发明申请
    DETERMINISTIC DATA COLLECTION FROM MOBILE NETWORK DEVICE TRAVELING WITHIN A DETERMINISTIC NETWORK 审中-公开

    公开(公告)号：US20190014030A1

    公开(公告)日：2019-01-10

    申请号：US15642657

    申请日：2017-07-06

    Applicant: Cisco Technology, Inc.

    Inventor： PASCAL THUBERT ,  PATRICK WETTERWALD ,  ERIC MICHEL LEVY-ABEGNOLI ,  JEAN-PHILIPPE VASSEUR

    IPC: H04L12/751 ,  H04W24/02

    CPC classification number: H04L45/02 ,  H04W24/02 ,  H04W40/02 ,  H04W84/18

    Abstract: In one embodiment, a method comprises: determining access point devices providing network coverage for a mobile network device within a prescribed coverage area of a deterministic network; establishing a deterministic reception tree comprising a root and switching devices associated with the access point devices, the deterministic reception tree enabling any one or more of the switching devices to forward toward the root a data packet, transmitted by the mobile network device at a prescribed transmission time, for deterministic reception by the root at a prescribed reception time regardless of any distance of any of the access point devices from the root; and causing the switching devices to implement the deterministic reception tree enabling the root to deterministically receive the data packet, received by any one or more of the access point devices, at the prescribed reception time.

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