Patents by Inventor Christian Schmutzer

Christian Schmutzer 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: 20250240251
    Abstract: Techniques for management of a dejitter buffer for network communication. A system includes ports to receive emulated traffic transmitted over a packet network, a central memory pool, a controller to allocate memory from the central memory pool dejitter buffers, and an arbiter to arbitrate read and write access from the ports to the central memory pool for the of dejitter buffers. A portion of the central memory pool is allocated as a respective dejitter buffer for each of the plurality of ports, based on a transmission rate associated with each respective port. The controller is capable of allocating any portion of the central memory pool as the dejitter buffer for any respective port, and the controller is configured to, during operation, dynamically change the portion of the central memory pool allocated as the dejitter buffer for a given port.
    Type: Application
    Filed: January 24, 2024
    Publication date: July 24, 2025
    Inventors: Sundeep P. PRABHU, Raghupathi SOMASHEKARAPPA, Luca DELLA CHIESA, Christian SCHMUTZER
  • Patent number: 12301467
    Abstract: A method is provided to compensate for differential delay among a plurality of paths between first and second nodes in a network. The method may involve measuring delay for each of the plurality of paths for a plurality of sub-flows transmitted between the first node and the second node on respective paths of the plurality of paths. The plurality of sub-flows are obtained by splitting a traffic flow. The method involves determining delay differences among the delay for each of the plurality of paths, and adjusting, based on the delay differences, a queue delay associated with a respective flow of the plurality of sub-flows on one or more of the plurality of paths to achieve a path delay that is equal to a target path delay for each of the plurality of paths.
    Type: Grant
    Filed: October 18, 2022
    Date of Patent: May 13, 2025
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Luca Della Chiesa, Christian Schmutzer, Raghupathi Somashekarappa
  • Patent number: 12261641
    Abstract: A method is performed by a gateway node that is at a boundary of the first network domain and the second network domain. The method includes receiving an end-to-end delay measurement request sent by the first node to measure end-to-end delay between the first node and the second node. The end-to-end delay measurement request is configured to initiate a first delay measurement process configured for use in the first network domain. The gateway node sends to the second node a delay measurement request configured to initiate a second delay measurement process configured for use in the second network domain. The gateway node determines a delay measurement in the second network domain between the gateway node and the second node using the second delay measurement process. The gateway node sends to the first node an end-to-end delay measurement response that enables the first node to compute the end-to-end delay.
    Type: Grant
    Filed: November 18, 2022
    Date of Patent: March 25, 2025
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Christian Schmutzer, Luca Della Chiesa
  • Publication number: 20240348559
    Abstract: Techniques for enabling a resource reservation routing protocol (e.g., the Resource Reservation Protocol-Traffic Engineering (RSVP-TE) protocol) to perform routing operations based at least in part on bandwidth reservations by a non-reservation protocol (e.g., the Segment Routing (SR) protocol) are described herein. In some cases, the techniques described herein enable an example network to use both a resource reservation protocol and a non-reservation protocol. In some cases, one or more bandwidth reservation measures associated with a label-switched path (LSP) associated with a non-reservation protocol (e.g., an SR LSP) are used to create LSPs associated with a resource reservation protocol (e.g., RSVP-TE LSPs).
    Type: Application
    Filed: July 21, 2023
    Publication date: October 17, 2024
    Applicant: Cisco Technology, Inc.
    Inventors: Christian Schmutzer, Francois Clad, Stephane Litkowski
  • Publication number: 20240340236
    Abstract: Presented herein are techniques that remove the unnecessary provisioning system complexities of manual inter-domain service/circuit stitching by introducing a solution to perform dynamic end-to-end circuit setup in a hybrid networking environment. A method is provided that is performed by a gateway node at a boundary of a first domain and a second domain of a hybrid network, the first domain and the second domain using different types of transport and different types of control planes.
    Type: Application
    Filed: April 6, 2023
    Publication date: October 10, 2024
    Inventors: Bharath Vasudevan, Christian Schmutzer
  • Patent number: 12052532
    Abstract: Presented herein are techniques to manage optical network infrastructure. A method includes inducing a predetermined vibration on a fiber optic cable, the predetermined vibration being sufficient to cause a change to at least one of a state of polarization and a phase of optical signals being carried by respective optical fibers in the fiber optic cable, detecting, at a first endpoint, using a first coherent optical receiver, and at a second endpoint, using a second coherent optical receiver, the change to the at least one of the state of polarization and the phase of the optical signals, and based on the detecting, determining that the first endpoint and the second endpoint are connected to, or in communication with, one another via at least one finer in the fiber optic cable.
    Type: Grant
    Filed: July 22, 2022
    Date of Patent: July 30, 2024
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Luca Della Chiesa, Christian Schmutzer
  • Patent number: 12003396
    Abstract: In one example, an indication of a time during which a network communication obtained from a first network node was processed by the first network node, and an indication of a propagation delay from a second network node to the first network node, are obtained. A time during which the network communication was processed by the second network node is determined. A propagation delay from the first network node to the second network node is calculated based on the time during which the network communication was processed by the first network node and the time during which the network communication was processed by the second network node. A difference between the propagation delay from the first network node to the second network node, and the propagation delay from the second network node to the first network node, is determined and compensated is made for that difference.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: June 4, 2024
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Christian Schmutzer, Luca Della Chiesa
  • Publication number: 20240171271
    Abstract: A method is performed by a gateway node that is at a boundary of the first network domain and the second network domain. The method includes receiving an end-to-end delay measurement request sent by the first node to measure end-to-end delay between the first node and the second node. The end-to-end delay measurement request is configured to initiate a first delay measurement process configured for use in the first network domain. The gateway node sends to the second node a delay measurement request configured to initiate a second delay measurement process configured for use in the second network domain. The gateway node determines a delay measurement in the second network domain between the gateway node and the second node using the second delay measurement process. The gateway node sends to the first node an end-to-end delay measurement response that enables the first node to compute the end-to-end delay.
    Type: Application
    Filed: November 18, 2022
    Publication date: May 23, 2024
    Inventors: Christian Schmutzer, Luca Della Chiesa
  • Patent number: 11979310
    Abstract: Techniques are provided for signal translation in a hybrid network environment. In one example, a first provider edge node obtains a connection status indication from a first one of a second provider edge node via a packet switched network or a third provider edge node via a time-division multiplexing transport network. The first provider edge node translates the connection status indication between a packet switched network format and a time-division multiplexing transport network format. The first provider edge node provides the connection status indication to a second one of the second provider edge node via the packet switched network or the third provider edge node via the time-division multiplexing transport network.
    Type: Grant
    Filed: March 30, 2021
    Date of Patent: May 7, 2024
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Patrice Brissette, Christian Schmutzer, Luca Della Chiesa
  • Publication number: 20240129250
    Abstract: A method is provided to compensate for differential delay among a plurality of paths between first and second nodes in a network. The method may involve measuring delay for each of the plurality of paths for a plurality of sub-flows transmitted between the first node and the second node on respective paths of the plurality of paths. The plurality of sub-flows are obtained by splitting a traffic flow. The method involves determining delay differences among the delay for each of the plurality of paths, and adjusting, based on the delay differences, a queue delay associated with a respective flow of the plurality of sub-flows on one or more of the plurality of paths to achieve a path delay that is equal to a target path delay for each of the plurality of paths.
    Type: Application
    Filed: October 18, 2022
    Publication date: April 18, 2024
    Inventors: Luca Della Chiesa, Christian Schmutzer, Raghupathi Somashekarappa
  • Publication number: 20240031710
    Abstract: Presented herein are techniques to manage optical network infrastructure. A method includes inducing a predetermined vibration on a fiber optic cable, the predetermined vibration being sufficient to cause a change to at least one of a state of polarization and a phase of optical signals being carried by respective optical fibers in the fiber optic cable, detecting, at a first endpoint, using a first coherent optical receiver, and at a second endpoint, using a second coherent optical receiver, the change to the at least one of the state of polarization and the phase of the optical signals, and based on the detecting, determining that the first endpoint and the second endpoint are connected to, or in communication with, one another via at least one finer in the fiber optic cable.
    Type: Application
    Filed: July 22, 2022
    Publication date: January 25, 2024
    Inventors: Luca Della Chiesa, Christian Schmutzer
  • Publication number: 20240022467
    Abstract: In one example, techniques are provided for extending an active measurement protocol with an Operations, Administration and Management/Maintenance (OAM) channel. A first Provider Edge (PE) node obtains from or provides to a second PE node, over a packet-switched network via an overlay, OAM data in an OAM channel of the active measurement protocol. The OAM data relates to a networking issue. The network issue is automatically resolved responsive to the OAM data.
    Type: Application
    Filed: July 15, 2022
    Publication date: January 18, 2024
    Inventors: Christian Schmutzer, Patrice Brissette, Rakesh Gandhi
  • Publication number: 20230412422
    Abstract: Interworking between different layer two (L2) medias using network tunnels is provided by receiving, at a virtual gateway network element (GNE), a packet from a first L2 media type network for transmission to a second L2 media type network under the control of a different entities, wherein the first and second L2 media type networks are incompatible for direct packet transmission; removing, at the virtual GNE, ethernet encapsulation from the packet; re-encapsulating, at a network device located between the virtual GNE and a packet network, the packet in a multi-protocol label switching (MPLS) encapsulation; forwarding, over the packet network, the packet from the network device to a digital communication channel (DCC) associated with the second L2 media type network; replacing, at the DCC, the MPLS encapsulation with a link access protocol (LAP) encapsulation; and transmitting the packet encapsulated with the LAP encapsulation to the second L2 media type network.
    Type: Application
    Filed: August 25, 2023
    Publication date: December 21, 2023
    Inventors: Christian SCHMUTZER, Onkar R. DESHPANDE, Patrick J. CUNNINGHAM
  • Patent number: 11792042
    Abstract: Interworking between different layer two (L2) medias using network tunnels is provided by receiving, at a virtual gateway network element (GNE), a packet from a first L2 media type network for transmission to a second L2 media type network under the control of a different entities, wherein the first and second L2 media type networks are incompatible for direct packet transmission; removing, at the virtual GNE, ethernet encapsulation from the packet; re-encapsulating, at a network device located between the virtual GNE and a packet network, the packet in a multi-protocol label switching (MPLS) encapsulation; forwarding, over the packet network, the packet from the network device to a digital communication channel (DCC) associated with the second L2 media type network; replacing, at the DCC, the MPLS encapsulation with a link access protocol (LAP) encapsulation; and transmitting the packet encapsulated with the LAP encapsulation to the second L2 media type network.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: October 17, 2023
    Assignee: Cisco Technology, Inc.
    Inventors: Christian Schmutzer, Onkar R. Deshpande, Patrick J. Cunningham
  • Patent number: 11595119
    Abstract: In one example, a first Provider Edge (PE) node is configured to communicate with a second PE node through a packet-switched network and with a third PE node through the packet-switched network. The first PE node communicates with a fourth PE node via the second PE node. The fourth PE node is configured to communicate with the second PE node over a working path through a time-division multiplexing transport network. The first PE node exchanges, with the fourth PE node, protection information. Based on exchanging the protection information, the first PE node communicates with the fourth PE node via the third PE node. The fourth PE node is further configured to communicate with the third PE node over a protection path through the time-division multiplexing transport network.
    Type: Grant
    Filed: January 11, 2021
    Date of Patent: February 28, 2023
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Raghunandan Annavajjala, Sudhir Kayamkulangara, Christian Schmutzer, Luca Della Chiesa, Rayen Mohanty
  • Publication number: 20220321451
    Abstract: Techniques are provided for signal translation in a hybrid network environment. In one example, a first provider edge node obtains a connection status indication from a first one of a second provider edge node via a packet switched network or a third provider edge node via a time-division multiplexing transport network. The first provider edge node translates the connection status indication between a packet switched network format and a time-division multiplexing transport network format. The first provider edge node provides the connection status indication to a second one of the second provider edge node via the packet switched network or the third provider edge node via the time-division multiplexing transport network.
    Type: Application
    Filed: March 30, 2021
    Publication date: October 6, 2022
    Inventors: Patrice Brissette, Christian Schmutzer, Luca Della Chiesa
  • Patent number: 11444875
    Abstract: Techniques are presented herein for load-balancing a sequence of packets over multiple network paths on a per-packet basis. In one example, a first network node assigns sequence numbers to a sequence of packets and load-balances the sequence of packets on a per-packet basis over multiple network paths of a network to a second network node. The second network node buffers received packets that are received over the multiple network paths of the network from the first network node and re-orders the received packets according to sequence numbers of the received packets.
    Type: Grant
    Filed: September 25, 2020
    Date of Patent: September 13, 2022
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Luca Della Chiesa, Christian Schmutzer, Patrice Brissette
  • Patent number: 11394481
    Abstract: Techniques are described herein for efficient processing of Time-Division Multiplexing (TDM) based signals. In one example embodiment, a system includes a first TDM card, a second TDM card, and a processor in communication with the first TDM card and the second TDM card. The second TDM card hosts an aggregation process configured to aggregate a first TDM based signal and a second TDM based signal into a combined TDM based signal. The processor is configured to obtain a packetized version of the first TDM based signal from the first TDM card and provide the packetized version of the first TDM based signal to the second TDM card. The processor is further configured to prompt one or more packet cards to output packets based on the combined TDM based signal.
    Type: Grant
    Filed: June 2, 2021
    Date of Patent: July 19, 2022
    Assignee: CISCO TECHNOLOGY, INC.
    Inventors: Christian Schmutzer, Raghunandan Annavajjala, Luca Della Chiesa, Prafull Soni, Anand Brahmanad Agarwal, Jayashree Krishnaswamy
  • Publication number: 20220224410
    Abstract: In one example, a first Provider Edge (PE) node is configured to communicate with a second PE node through a packet-switched network and with a third PE node through the packet-switched network. The first PE node communicates with a fourth PE node via the second PE node. The fourth PE node is configured to communicate with the second PE node over a working path through a time-division multiplexing transport network. The first PE node exchanges, with the fourth PE node, protection information. Based on exchanging the protection information, the first PE node communicates with the fourth PE node via the third PE node. The fourth PE node is further configured to communicate with the third PE node over a protection path through the time-division multiplexing transport network.
    Type: Application
    Filed: January 11, 2021
    Publication date: July 14, 2022
    Inventors: Raghunandan Annavajjala, Sudhir Kayamkulangara, Christian Schmutzer, Luca Della Chiesa, Rayen Mohanty
  • Publication number: 20220103480
    Abstract: Techniques are presented herein for load-balancing a sequence of packets over multiple network paths on a per-packet basis. In one example, a first network node assigns sequence numbers to a sequence of packets and load-balances the sequence of packets on a per-packet basis over multiple network paths of a network to a second network node. The second network node buffers received packets that are received over the multiple network paths of the network from the first network node and re-orders the received packets according to sequence numbers of the received packets.
    Type: Application
    Filed: September 25, 2020
    Publication date: March 31, 2022
    Inventors: Luca Della Chiesa, Christian Schmutzer, Patrice Brissette