Patents by Inventor Pascal Thubert

Pascal Thubert has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20220311693
    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.
    Type: Application
    Filed: March 26, 2021
    Publication date: September 29, 2022
    Inventors: PASCAL THUBERT, HUIMIN SHE, LING WEI
  • Publication number: 20220311705
    Abstract: Techniques for leveraging MLD capabilities at edge nodes of network fabrics to receive SNMAs from silent hosts, and creating unicast addresses from the SNMAs for the silent nodes that are used as secondary matches in a network overlay if primary unicast address lookups fail. The edge nodes described herein may act as snoopers of MLD reports in order to identify the SNMAs of the silent hosts. The edge nodes then forge unicast addresses for the silent hosts that match with the least three bytes of the SNMAs. The forged unicast addresses are presented as unicast MAC/IP mappings in the fabric overlay. In situations where a primary IP address lookup fails, the look-up device performs a secondary lookup for a mapped address that has the last three bytes of the IP address. If a mapping is found, the lookup is sent as a unicast message to the matching MAC address.
    Type: Application
    Filed: March 26, 2021
    Publication date: September 29, 2022
    Inventors: Pascal Thubert, Eric Levy-Abegnoli, Patrick Wetterwald
  • Patent number: 11451945
    Abstract: In one embodiment, a supervisory device in a network forms a virtual access point (VAP) for a node in the network. A set of access points (APs) in the network are mapped to the VAP as part of a VAP mapping and the node treats the APs in the VAP mapping as a single AP for purposes of communicating with the network. The supervisory device receives measurements from the APs in the VAP mapping regarding communications associated with the node. The supervisory device identifies a movement of the node based on the received measurements from the APs in the VAP mapping. The supervisory device adjusts the set of APs in the VAP mapping based on the identified movement of the node.
    Type: Grant
    Filed: March 17, 2020
    Date of Patent: September 20, 2022
    Assignee: Cisco Technology, Inc.
    Inventors: Pascal Thubert, Jean-Philippe Vasseur, Patrick Wetterwald, Eric Levy-Abegnoli
  • Publication number: 20220295423
    Abstract: In one embodiment, a method comprises: determining, by a constrained network device in a low power and lossy network (LLN), a self-estimated density value of neighboring LLN devices based on wirelessly receiving an identified number of beacon message transmissions within an identified time interval from neighboring transmitting LLN devices in the LLN; setting, by the constrained network device, a first wireless transmit power value based on the self-estimated density value; and transmitting a beacon message at the first wireless transmit power value, the beacon message specifying the self-estimated density value, a corresponding trust metric for the self-estimated density value, and the first wireless transmit power value used by the constrained network device for transmitting the beacon message.
    Type: Application
    Filed: June 2, 2022
    Publication date: September 15, 2022
    Inventors: Pascal Thubert, Robert Edgar Barton, Jerome Henry, Eric Michel Levy-Abegnoli
  • Patent number: 11445454
    Abstract: In one embodiment, a method comprises: determining, by a constrained network device in a low power and lossy network (LLN), a self-estimated density value of neighboring LLN devices based on wirelessly receiving an identified number of beacon message transmissions within an identified time interval from neighboring transmitting LLN devices in the LLN; setting, by the constrained network device, a first wireless transmit power value based on the self-estimated density value; and transmitting a beacon message at the first wireless transmit power value, the beacon message specifying the self-estimated density value, a corresponding trust metric for the self-estimated density value, and the first wireless transmit power value used by the constrained network device for transmitting the beacon message.
    Type: Grant
    Filed: May 19, 2021
    Date of Patent: September 13, 2022
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Pascal Thubert, Robert Edgar Barton, Jerome Henry, Eric Michel Levy-Abegnoli
  • Patent number: 11445500
    Abstract: Providing for time sensitive networking (TSN) traffic in high density deployments is described. An access point (AP) is a high density deployment receives a message identifying another AP as a TSN neighbor and also detects a TSN device within an area covered by the APs. This arrangement may cause traffic interruptions for the TSN traffic between the TSN device and the APs. In order to prevent disruption in TSN traffic, a TSN time slot and a resource unit (RU) is determined for each of the APs, and the TSN traffic is communicated between the various devices in network according to the determined TSN time slot and RU.
    Type: Grant
    Filed: May 6, 2020
    Date of Patent: September 13, 2022
    Assignee: Cisco Technology, Inc.
    Inventors: Akram I. Sheriff, Pascal Thubert, Jerome Henry, Robert E. Barton
  • Patent number: 11431526
    Abstract: According to one or more embodiments of the disclosure, a first tunnel router may receive a reservation request to establish a deterministic path between a first node and a second node. The first tunnel router may determine, based on the reservation request, a destination address of the second node. The first tunnel router may identify, based on the destination address of the second node, a second tunnel router associated with the second node. The first tunnel router may encapsulate a deterministic packet sent by the first towards the second node into a tunnel packet, wherein a multicast address in a header of the tunnel packet is set to the destination address of the second node. The first tunnel router can forward the tunnel packet along the deterministic path. The multicast address in the header of the tunnel packet causes nodes to send the tunnel packet according to the deterministic path.
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: August 30, 2022
    Assignee: Cisco Technology, Inc.
    Inventors: Rekha Ramachandran, Pascal Thubert
  • Patent number: 11431617
    Abstract: In one example, a responder obtains an Operations, Administration, and Management/Maintenance (OAM) probe packet from a network entity operating as an initiator in a network, provides, to the initiator, a first response to the OAM probe packet over a first network path in the network, and further provides, to the initiator, a second response to the OAM probe packet over a second network path in the network that is different from the first network path. In another example, an initiator provides an OAM probe packet to a network entity operating as responder in a network, obtains, from the responder, a first response to the OAM probe packet over a first network path in the network, and further obtains, from the responder, a second response to the OAM probe packet over a second network path in the network that is different from the first network path.
    Type: Grant
    Filed: May 13, 2020
    Date of Patent: August 30, 2022
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Nagendra Kumar Nainar, Carlos M. Pignataro, Reshad Rahman, Pascal Thubert
  • Patent number: 11431518
    Abstract: In one embodiment, a method comprises: identifying, by a low power and lossy network (LLN) device in a low power and lossy network, a minimum distance value and a distance limit value for limiting multicast propagation, initiated at the LLN device, of a multicast data message in the LLN; and multicast transmitting, by the LLN device, the multicast data message with a current distance field specifying the minimum distance value and a distance limit field specifying the distance limit value, the multicast transmitting causing a receiving LLN device having a corresponding rank in the LLN to respond to the multicast data message by: (1) determining an updated distance based on adding to the current distance field a rank difference between the receiving LLN device and the LLN device, and (2) selectively retransmitting the multicast data message if the updated distance is less than the distance limit value.
    Type: Grant
    Filed: February 13, 2020
    Date of Patent: August 30, 2022
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Pascal Thubert, Huimin She, Chuanwei Li, Lele Zhang
  • Patent number: 11425009
    Abstract: In one embodiment, a service receives a feature availability report indicative of which telemetry variables are available at a device in a network and resource costs associated with data features that the device could compute from the telemetry variables. The service selects at least a subset of the data features for input to a machine learning model, based on their associated resource costs and on their respective impacts on one or more performance metrics for the machine learning model. The service trains the machine learning model to evaluate the selected data features. The service sends the trained machine learning model to the device. The device computes the selected data features from the telemetry variables available at the device and uses the computed data features as input to the machine learning model.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: August 23, 2022
    Assignee: Cisco Technology, Inc.
    Inventors: Jean-Philippe Vasseur, Pascal Thubert, Eric Levy-Abegnoli, Patrick Wetterwald
  • Patent number: 11425228
    Abstract: Protocol independent signal slotting and scheduling is provided by receiving a frame including a header and a payload for transmission; in response to determining that the frame matches a rule identifying the frame as part of a control loop, compressing the header according to the rule to produce a compressed packet of a predefined size that includes the compressed header and the payload; scheduling transmission of the compressed packet; and transmitting the compressed packet to a receiving device. In some embodiments, before compressing the frame, in response to determining that a size of the payload does not match a predefined size threshold: the payload is fragmented into a plurality of portions, wherein each portion satisfies the predefined size threshold, or the compressed packet is padded to the predefined size threshold via forward error correction padding information.
    Type: Grant
    Filed: March 18, 2020
    Date of Patent: August 23, 2022
    Assignee: Cisco Technology, Inc.
    Inventors: Pascal Thubert, Eric M. Levy-Abegnoli, Patrick Wetterwald, Jean-Philippe Vasseur
  • Publication number: 20220264581
    Abstract: In one embodiment, a method comprises: detecting, by a wireless mirror device in a wireless data network, link layer transmission of a wireless data unit between a wireless access point (AP) device and a wireless client device on a first allocated frequency channel at a first transmission interval; and transmitting, by the wireless mirror device based on detecting the link layer transmission, the wireless data unit at a second transmission interval on a second allocated frequency channel that is allocated to the wireless mirror device for a mirror transmission between the wireless AP device and the wireless client device at the second transmission interval.
    Type: Application
    Filed: February 16, 2021
    Publication date: August 18, 2022
    Inventors: DOMENICO FICARA, AMINE CHOUKIR, PASCAL THUBERT, MALCOLM SMITH
  • Patent number: 11418481
    Abstract: Systems and methods may include sending, to a network registrar, a first message including a first nonce generated by a host computing device, and receiving, from the network registrar, a second message including a second nonce, the second nonce being signed by the network registrar via a private key of a first public key infrastructure (PKI) key pair of the network registrar via a first signature. The method further includes sending a first neighbor advertisement (NA) message to the host computing device including the second nonce. The second nonce and the private key of the network registrar verifies the first signature from the network registrar, the verification of the first signature indicating that the router is not impersonating the network.
    Type: Grant
    Filed: October 1, 2021
    Date of Patent: August 16, 2022
    Assignee: Cisco Technology, Inc.
    Inventors: Pascal Thubert, Eric Levy-Abegnoli, Jonas Zaddach, Patrick Wetterwald
  • Publication number: 20220247714
    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.
    Type: Application
    Filed: April 20, 2022
    Publication date: August 4, 2022
    Inventors: Pascal THUBERT, Yinfang WANG, Huimin SHE, Feiliang WANG
  • Publication number: 20220247586
    Abstract: In one embodiment, a method comprises: generating, by a constrained low power and lossy network (LLN) device that is localized within a subregion of an LLN, a thin destination oriented directed acyclic graph (DODAG) having up to a prescribed limit of attached LLN devices at each hop of the thin DODAG based on generating a DODAG information object (DIO) message specifying an instruction for limiting attachment at each hop of the thin DODAG to the prescribed limit; and causing, by the constrained LLN device, multicast-only transmissions via the thin DODAG based on inserting into the DIO message a multicast-only transmission mode via the thin DODAG and outputting the DIO message, the DIO message causing each neighboring LLN device to selectively attach to the constrained LLN device as an attached child LLN device based on the instruction and execute the multicast-only transmissions via the thin DODAG.
    Type: Application
    Filed: April 22, 2022
    Publication date: August 4, 2022
    Inventors: PASCAL THUBERT, HUIMIN SHE, FEILIANG WANG, YINFANG WANG
  • Patent number: 11405299
    Abstract: This disclosure describes techniques for monitoring expected behavior of devices in a computing network. Behavior of network devices may include performing various functions associated with transferring data packets through the computing network. Monitoring expected behavior may include sending a probe packet into the computing network, and determining whether network devices behave as expected with respect to the probe packet. In some examples, behaviors such as replicating, forwarding, eliminating, ordering, and/or other functions regarding data packets may be validated using the present techniques. As computing networks and/or operations become more complex, assuring the expected behavior of network devices may become more important for the continued efficient, smooth, successful, and/or timely flow of data traffic.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: August 2, 2022
    Assignee: Cisco Technology, Inc.
    Inventors: Nagendra Kumar Nainar, Carlos M. Pignataro, Pascal Thubert
  • Patent number: 11399387
    Abstract: System and method for scheduling for redundant layer 2 control messages may be provided. A control message for a Station (STA) may be received at a secondary Access Point (AP) from a primary AP. The primary AP and the secondary AP may both cover the STA. The primary AP may send the control message to both the secondary AP and the STA. The secondary AP may listen for an acknowledgement from the STA to the primary AP confirming receipt of the control message. The secondary AP may resend the control message to the STA in response to no acknowledgement from the STA to the primary AP confirming the receipt of the control message.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: July 26, 2022
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Pascal Thubert, Patrick Wetterwald, Eric Levy-Abegnoli
  • Patent number: 11394567
    Abstract: In one embodiment, a method comprises: generating, by a constrained low power and lossy network (LLN) device that is localized within a subregion of an LLN, a thin destination oriented directed acyclic graph (DODAG) having up to a prescribed limit of attached LLN devices at each hop of the thin DODAG based on generating a DODAG information object (DIO) message specifying an instruction for limiting attachment at each hop of the thin DODAG to the prescribed limit; and causing, by the constrained LLN device, multicast-only transmissions via the thin DODAG based on inserting into the DIO message a multicast-only transmission mode via the thin DODAG and outputting the DIO message, the DIO message causing each neighboring LLN device to selectively attach to the constrained LLN device as an attached child LLN device based on the instruction and execute the multicast-only transmissions via the thin DODAG.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: July 19, 2022
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Pascal Thubert, Huimin She, Feiliang Wang, Yinfang Wang
  • Publication number: 20220225171
    Abstract: Optimal determination of wireless network pathway configurations may be provided. A computing device may receive an error profile and a response instruction associated with the error profile, as generated by a network controller. The computing device may then monitor, for an error, on a communication Track, in a network, between an ingress node and an egress node. Then, the computing device, upon detecting the error, can determine that the error is similar to the error profile, and based on the determination that the error is similar to the error profile, enact the response instruction. The response instruction can direct the computing device to switch from the communication Track to a communication subTrack between the ingress node and the egress node.
    Type: Application
    Filed: January 8, 2021
    Publication date: July 14, 2022
    Applicant: Cisco Technology, Inc.
    Inventors: Pascal Thubert, Arman Rezaee
  • Patent number: 11381518
    Abstract: In one embodiment, a device of a software defined wide area network (SD-WAN) predicts characteristics of a new traffic flow to be admitted to the SD-WAN, based on a set of initial packets of the flow. The device predicts an impact of admitting the flow to the SD-WAN, based in part on extrinsic or exogenous data regarding the SD-WAN. The device admits the flow to the SD-WAN, based on the predicted impact. The supervisory device uses reinforcement learning to adjust one or more call admission control (CAC) parameters of the SD-WAN, based on captured telemetry data regarding the admitted flow.
    Type: Grant
    Filed: August 25, 2020
    Date of Patent: July 5, 2022
    Assignee: Cisco Technology, Inc.
    Inventors: Patrick Wetterwald, Pascal Thubert, Jean-Philippe Vasseur, Eric Levy-Abegnoli, Stephane Labetoulle