公开(公告)号：US11239932B2

公开(公告)日：2022-02-01

申请号：US16230849

申请日：2018-12-21

Applicant: Cisco Technology, Inc.

Inventor： Raghunandan Annavajjala ,  Anand B. Agarwal ,  Onkar R. Deshpande ,  Christian Schmutzer

IPC: H04J3/06 ,  H04J3/16 ,  H04J3/14

Abstract: Techniques for emulating a time division multiplexed (TDM) circuit using a packet switched network are described. First and second packet nodes are installed in a communication network. The first TDM node and second TDM node form a first span in the TDM circuit. First and second fiber connections are disconnected from the first and second TDM nodes, and connected to the first and second packet nodes. A portion of TDM data transmission across the first span is emulated using a packet connection formed by the first packet node and the second packet node. The TDM data transmission includes transport overhead data, and the packet connection emulates the transport overhead data.

公开(公告)号：US12261641B2

公开(公告)日：2025-03-25

申请号：US17989788

申请日：2022-11-18

Applicant: Cisco Technology, Inc.

Inventor： Christian Schmutzer ,  Luca Della Chiesa

IPC: H04B10/07 ,  H04B10/077 ,  H04J3/16 ,  H04L43/0852

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.

公开(公告)号：US12003396B2

公开(公告)日：2024-06-04

申请号：US16851631

申请日：2020-04-17

Applicant: Cisco Technology, Inc.

Inventor： Christian Schmutzer ,  Luca Della Chiesa

IPC: H04L43/0852 ,  H04L47/56

CPC classification number: H04L43/0852 ,  H04L47/56

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.

公开(公告)号：US20240171271A1

公开(公告)日：2024-05-23

申请号：US17989788

申请日：2022-11-18

Applicant: Cisco Technology, Inc.

Inventor： Christian Schmutzer ,  Luca Della Chiesa

IPC: H04B10/077 ,  H04J3/16 ,  H04L43/0852

CPC classification number: H04B10/0775 ,  H04J3/1664 ,  H04L43/0852

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.

公开(公告)号：US11979310B2

公开(公告)日：2024-05-07

申请号：US17217322

申请日：2021-03-30

Applicant: Cisco Technology, Inc.

Inventor： Patrice Brissette ,  Christian Schmutzer ,  Luca Della Chiesa

IPC: H04L12/46 ,  H04L41/0686 ,  H04L45/02 ,  H04L69/321

CPC classification number: H04L45/04 ,  H04L12/46 ,  H04L41/0686 ,  H04L69/321

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.

公开(公告)号：US20240031710A1

公开(公告)日：2024-01-25

申请号：US17871093

申请日：2022-07-22

Applicant: Cisco Technology, Inc.

Inventor： Luca Della Chiesa ,  Christian Schmutzer

IPC: H04Q11/00 ,  H04B10/61 ,  H04B10/073 ,  G01H9/00

CPC classification number: H04Q11/0062 ,  H04B10/615 ,  H04B10/073 ,  G01H9/004 ,  H04Q2011/0083 ,  H04Q2011/0073

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.

公开(公告)号：US20220321451A1

公开(公告)日：2022-10-06

申请号：US17217322

申请日：2021-03-30

Applicant: Cisco Technology, Inc.

Inventor： Patrice Brissette ,  Christian Schmutzer ,  Luca Della Chiesa

IPC: H04L12/715 ,  H04L12/46 ,  H04L12/24 ,  H04L29/08

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.

公开(公告)号：US11444875B2

公开(公告)日：2022-09-13

申请号：US17032874

申请日：2020-09-25

Applicant: Cisco Technology, Inc.

Inventor： Luca Della Chiesa ,  Christian Schmutzer ,  Patrice Brissette

IPC: H04L47/125 ,  H04L47/726 ,  H04L12/46 ,  H04L45/24 ,  H04L47/41

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.

公开(公告)号：US20210203577A1

公开(公告)日：2021-07-01

申请号：US16851631

申请日：2020-04-17

Applicant: Cisco Technology, Inc.

Inventor： Christian Schmutzer ,  Luca Della Chiesa

IPC: H04L12/26 ,  H04L12/875

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.