公开(公告)号：US20230422023A1

公开(公告)日：2023-12-28

申请号：US17850094

申请日：2022-06-27

Applicant: Cisco Technology, Inc.

Inventor： PASCAL THUBERT ,  HUIMIN SHE ,  LI ZHAO

IPC: H04W8/26 ,  H04W4/70

CPC classification number: H04W8/26 ,  H04W4/70 ,  H04W88/16

Abstract: In one embodiment, a method comprises: outputting, by a gateway device in a wireless data network comprising wireless network devices, a rule template for execution by any of the wireless network devices, the rule template comprising a device information variable for insertion of a device-specific value by a corresponding wireless network device executing the rule template, a context variable for insertion, by the wireless network devices, of a generic network context, and a compression rule specifying a compression operation and a corresponding decompression operation; and providing the generic network context to the wireless network devices, enabling each wireless network device to selectively execute the rule template, for execution of one of the compression operation on a network protocol data packet or the corresponding decompression operation for recovery of the network protocol data packet, based on the insertion of the corresponding device-specific value for the device information variable.

公开(公告)号：US20230064808A1

公开(公告)日：2023-03-02

申请号：US17671712

申请日：2022-02-15

Applicant: Cisco Technology, Inc.

Inventor： PASCAL THUBERT ,  HUIMIN SHE ,  LI ZHAO ,  JEAN-PHILIPPE VASSEUR

IPC: H04W48/18 ,  H04W24/08 ,  H04W36/12 ,  H04L43/0876

Abstract: In one embodiment, a method comprises: first determining, by a controller, a target load for each of at least first and second wireless data networks rooted by respective first and second root network devices; second determining, by the controller, that at least a prescribed minimum number of network devices attached within the first wireless data network need to migrate from the first wireless data network to the second wireless data network based on the respective target loads; and causing, by the controller, the prescribed minimum number of network devices to migrate from the first wireless data network to the second wireless data network, based on the controller sending to the first and second root network devices enrollment priorities to be advertised by the first and second root network devices, respectively.

公开(公告)号：US20210314290A1

公开(公告)日：2021-10-07

申请号：US16838252

申请日：2020-04-02

Applicant: Cisco Technology, Inc.

Inventor： PASCAL THUBERT ,  YINFANG WANG ,  HUIMIN SHE ,  FEILIANG WANG

IPC: H04L29/12 ,  H04L12/24 ,  H04L12/18 ,  H04L29/06

Abstract: In one embodiment, a method comprises: receiving, by a root network device providing a DAG topology in a low power and lossy network (LLN), one or more multicast registration messages from an LLN device and identifying distinct properties of the LLN device; receiving, by the root network device, one or more multicast address group identifiers of one or more multicast streams to which the LLN device has subscribed, and associating the one or more multicast address group identifiers with the distinct properties; receiving a multicast message specifying one of the multicast address group identifiers; and generating, by the root network device, a directed multicast message having a multi-dimensional addressing data structure comprising a selected one of the distinct properties and the one multicast address group identifier, causing parent network devices in the DAG topology to selectively retransmit based on determining a child network device has the selected one distinct property.

公开(公告)号：US20210029653A1

公开(公告)日：2021-01-28

申请号：US16521184

申请日：2019-07-24

Applicant: CISCO TECHNOLOGY, INC.

Inventor： LELE ZHANG ,  HUIMIN SHE ,  WENCHUAN JI ,  CHUANWEI LI

IPC: H04W52/36 ,  H04W24/08 ,  G05B13/02

Abstract: In one embodiment, a technique for dynamic transmission power in wireless mesh networks using supervised and semi-supervised learning is provided. A first device of a mesh communication network may receive a set of transmission power metrics indicative of network conditions between a second device of the mesh communication network and a plurality of child nodes associated with the second device. The first device may provide the set of transmission power metrics as input to a supervised machine learning process that probabilistically determines one or more minimum transmission power thresholds for nodes of the mesh communication network. The first device may obtain an output from the supervised machine learning process comprising an indication of a particular minimum transmission power threshold for the second device. The first device may control the second device to exchange packets with the plurality of child nodes using the particular minimum transmission power threshold.

公开(公告)号：US20200014618A1

公开(公告)日：2020-01-09

申请号：US16026203

申请日：2018-07-03

Applicant: Cisco Technology, Inc.

Inventor： PASCAL THUBERT ,  JIANZHOU CHEN ,  HUIMIN SHE ,  PATRICK WETTERWALD

IPC: H04L12/703 ,  H04L12/751 ,  H04L12/26 ,  H04W28/02

Abstract: In one embodiment, a parent network device, operating according to a first Trickle operation using a first selected minimum contention interval, responds to detecting a loss of attached child network devices by starting a second Trickle operation using a second selected minimum contention interval. The second Trickle operation includes maintaining the second selected minimum contention interval for subsequent iterations of the second Trickle operation. The parent network device initiates an accelerated transmission rate of the advertisement message that is faster than the first and second Trickle operations (using a third selected minimum contention interval less than the first minimum contention interval) in response to receiving a message from one of the lost child network devices, and resumes the first Trickle operation upon recovery of all the lost child network devices.

公开(公告)号：US20190268942A1

公开(公告)日：2019-08-29

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.

公开(公告)号：US20230379782A1

公开(公告)日：2023-11-23

申请号：US17747649

申请日：2022-05-18

Applicant: Cisco Technology, Inc.

Inventor： PASCAL THUBERT ,  HUIMIN SHE ,  LI ZHAO

IPC: H04W36/22 ,  H04W60/06 ,  H04W28/08

CPC classification number: H04W36/22 ,  H04W60/06 ,  H04W28/0804

Abstract: In one embodiment, a method comprises: determining, by a controller device, load attributes for respective wireless network devices in a data network comprising at least a first wireless data network rooted by a first root network device, each wireless network device attached to at least an identified parent network device; identifying, by the controller device based on at least a subset of the load attributes, that at least one targeted device among the wireless network devices needs to migrate to a different parent network device in the data network; and causing, by the controller device, the targeted device to detach from its identified parent network device and attach to the different parent network device based on generating and outputting an individual attachment directive destined for the targeted device.

公开(公告)号：US20230319683A1

公开(公告)日：2023-10-05

申请号：US17712381

申请日：2022-04-04

Applicant: Cisco Technology, Inc.

Inventor： PASCAL THUBERT ,  LELE ZHANG ,  HUIMIN SHE ,  LI ZHAO

IPC: H04W40/24

CPC classification number: H04W40/246

Abstract: In one embodiment, a method comprises: creating, by a root network device in a wireless data network, a perimeter topology comprising a first distance vector-protocol path of a first group of perimeter devices and a second distance vector-protocol path of a second group of the perimeter devices, the creating comprising outputting first and second advertisement messages causing the perimeter devices to attach to only one parent of only one of the first or second distance vector-protocol paths and a junction device to attach at respective ends of the first and second distance vector-protocol paths; and causing the junction device to forward, from the first distance vector-protocol path, a data packet toward the root network device via the second distance vector-protocol path.

公开(公告)号：US20230068112A1

公开(公告)日：2023-03-02

申请号：US17409985

申请日：2021-08-24

Applicant: Cisco Technology, Inc.

Inventor： PASCAL THUBERT ,  LI ZHAO ,  HUIMIN SHE ,  CHUANWEI LI

IPC: H04L12/26 ,  H04L12/24 ,  H04L12/727

Abstract: In one embodiment, a method comprises: joining, by a network device, a network topology rooted by a root network device in a data network, and in response transmitting an advertisement indicating a position of the network device in the network topology; suppressing a second transmission based on initiating a deferred transmission operation in response to transmitting the advertisement; maintaining the deferred transmission operation to enable a prescribed minimum number of other network devices to join the network topology at respective identified lower positions than the position of the network device; and changing, by the network device, from the deferred transmission operation to an accelerated operation in response to expiration of a prescribed deferral interval or detecting the prescribed minimum number of other network devices having the respective identified lower positions, the accelerated operation enabling the network device to initiate transmission of a data packet before the other network devices.

公开(公告)号：US20220311693A1

公开(公告)日：2022-09-29

申请号：US17213393

申请日：2021-03-26

Applicant: Cisco Technology, Inc.

Inventor： PASCAL THUBERT ,  HUIMIN SHE ,  LING WEI

IPC: H04L12/751 ,  H04L12/46

Abstract: In one embodiment, a method comprises determining, by a controller device in a low power and lossy network (LLN), that a first LLN border device is in a first personal area network (PAN) having a first directed acyclic graph (DAG) topology, and that the first LLN border device is a neighbor of a second LLN border device in a second PAN of the LLN having a second DAG topology; receiving a path request for a third LLN device in the first PAN to reach a fourth LLN device in the second PAN; and generating an inter-PAN path between the third LLN device and the fourth LLN device via the first and second LLN border devices, the inter-PAN path providing a stitching between the first DAG topology and the second DAG topology.