公开(公告)号：US20200228426A1

公开(公告)日：2020-07-16

申请号：US16741528

申请日：2020-01-13

Applicant: Cisco Technology, Inc.

Inventor： Khawar Deen ,  Navindra Yadav ,  Anubhav Gupta ,  Shashidhar Gandham ,  Rohit Chandra Prasad ,  Abhishek Ranjan Singh ,  Shih-Chun Chang

IPC: H04L12/26 ,  H04L29/06 ,  G06F9/455 ,  G06N20/00 ,  G06F16/29 ,  G06F16/248 ,  G06F16/28 ,  G06F16/9535 ,  G06F16/2457 ,  G06F21/55 ,  G06F21/56 ,  H04L12/851 ,  H04L12/24 ,  H04W84/18 ,  H04L29/08 ,  G06F21/53 ,  H04L12/723 ,  G06F3/0484 ,  H04L1/24 ,  H04W72/08 ,  H04L9/08 ,  H04L9/32 ,  H04J3/06 ,  H04J3/14 ,  H04L29/12 ,  H04L12/813 ,  H04L12/823 ,  H04L12/801 ,  H04L12/741 ,  H04L12/833 ,  H04L12/721 ,  G06F3/0482 ,  G06T11/20 ,  H04L12/841 ,  H04L12/725 ,  H04L12/715 ,  G06F16/16 ,  G06F16/17 ,  G06F16/11 ,  G06F16/13 ,  G06N99/00 ,  G06F16/174 ,  G06F16/23

Abstract: A network analytics system can receive first sensor data, including first network activity and a first timestamp associated with a first clock of a first node, and second sensor data, including second network activity and a second timestamp associated with a second clock of a second node. The system can determine a first delta between the first clock and a third clock based on the first timestamp, and a second delta between the second clock and the third clock. The system can determine a first communication latency associated with a first sensor of the first node, and a second communication latency associated with a second sensor of the second node. The system can generate a report that synchronizes one or more data flows between the first node and the second node based on the first delta, the second delta, the first communication latency, and the second communication latency.

公开(公告)号：US10651938B2

公开(公告)日：2020-05-12

申请号：US16208046

申请日：2018-12-03

Applicant: Time Warner Cable Enterprises LLC

Inventor： Jun Xu ,  Nanjian Qian

IPC: H04B10/2575 ,  H04B10/272 ,  H04B10/27 ,  H04J3/14 ,  H04J3/16 ,  H04Q11/00 ,  H04J14/08

Abstract: Methods and apparatus for providing enhanced optical networking service and performance which are particularly advantageous in terms of low cost and use of existing infrastructure, access control techniques, and components. In the exemplary embodiment, current widespread deployment and associated low cost of Ethernet-based systems are leveraged through use of an Ethernet CSMA/CD MAC in the optical domain on a passive optical network (PON) system. Additionally, local networking services are optionally provided to the network units on the PON since each local receiver can receive signals from all other users. An improved symmetric coupler arrangement provides the foregoing functionality at low cost. The improved system architecture also allows for fiber failure protection which is readily implemented at low cost and with minimal modification.

公开(公告)号：US20190356645A1

公开(公告)日：2019-11-21

申请号：US16531854

申请日：2019-08-05

Applicant: Hubbell Incorporated

Inventor： Michael David Kramarczyk ,  Emmanuel Duvelson ,  Robert Walker

IPC: H04L29/06 ,  G05B19/05 ,  H04L29/08 ,  H04L12/24 ,  H04J3/14

Abstract: A secure control system includes a network of multiplexers that control end/field devices of an infrastructure system, such as an electric power grid. The multiplexers have a default secure lockdown state that prevents remote access to data on the multiplexers and prevents modification of software or firmware of the multiplexer. One or more of the multiplexers include a physical authentication device that confirms the physical proximity of a trusted individual when remote access is requested. A user accesses the network and one of the multiplexers remotely by way of login credentials. The trusted individual confirms the identity of the remote user and operates the physical authentication device connected with and in proximity to that multiplexer, thereby confirming that the remote user can be trusted to access data and reconfigure the multiplexers. The multiplexer connected with the physical authentication device generates a token that is passed to each of the multiplexers that the remote user needs access to. The token may specify a time period, after which, the multiplexers will reenter secure lockdown mode.

公开(公告)号：US10484984B2

公开(公告)日：2019-11-19

申请号：US15906994

申请日：2018-02-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Hao Tang ,  Yi Zhang

IPC: H04W72/04 ,  H04L1/00 ,  H04W72/00 ,  H04J3/14 ,  H04W28/20 ,  H04W72/12 ,  H04W88/12

Abstract: Embodiments provide a method for resource allocation, a terminal and a base station are disclosed. In an embodiment the method includes receiving, by a terminal, resource allocation information from a base station, wherein the terminal supports a new system carrier, wherein the new system carrier comprises a component carrier and an extension carrier, and wherein the resource allocation information comprises a resource allocation type and indication information of a first resource block unit and determining, by the terminal, according to the resource allocation information and a mapping relationship between a resource block unit and a physical resource, a first physical resource corresponding to the first resource block unit, wherein the mapping relationship between the resource block unit and the physical resource comprises a first mapping relationship and a second mapping relationship.

公开(公告)号：US20190334790A1

公开(公告)日：2019-10-31

申请号：US16173400

申请日：2018-10-29

Applicant: Cisco Technology, Inc.

Inventor： Mohammadreza Alizadeh Attar ,  Navindra Yadav ,  Abhishek Ranjan Singh ,  Vimalkumar Jeyakumar ,  Shashidhar Gandham ,  Roberto Fernando Spadaro

IPC: H04L12/26 ,  G06F16/29 ,  G06F16/2457 ,  G06F16/9535 ,  G06F16/28 ,  G06F16/248 ,  G06N20/00 ,  G06F21/56 ,  G06F21/55 ,  H04L29/06 ,  H04L12/813 ,  H04L9/32 ,  H04L9/08 ,  H04L12/721 ,  G06F21/53 ,  H04L12/24 ,  H04L12/851 ,  H04L12/725 ,  H04L12/823 ,  H04L29/12 ,  H04J3/14 ,  H04J3/06 ,  H04W72/08 ,  H04L1/24 ,  H04L29/08 ,  G06F3/0484 ,  H04L12/723 ,  H04L12/833 ,  H04L12/741 ,  H04L12/801 ,  H04W84/18 ,  H04L12/715 ,  H04L12/841 ,  G06T11/20 ,  G06F3/0482 ,  G06F16/11 ,  G06F16/17 ,  G06F16/13 ,  G06N99/00 ,  G06F16/16 ,  G06F16/23 ,  G06F16/174 ,  G06F9/455

Abstract: Systems, methods, and computer-readable media are provided for determining a packet's round trip time (RTT) in a network. A system can receive information of a packet sent by a component of the network and further determine an expected acknowledgement (ACK) sequence number associated with the packet based upon received information of the packet. The system can receive information of a subsequent packet received by the component and determine an ACK sequence number and a receiving time of the subsequent packet. In response to determining that the ACK sequence number of the subsequent TCP packet matches the expected ACK sequence number, the system can determine a round trip time (RTT) of the packet based upon the received information of the packet and the received information of the subsequent packet.

公开(公告)号：US10454758B2

公开(公告)日：2019-10-22

申请号：US15443974

申请日：2017-02-27

Applicant: Nicira, Inc.

Inventor： Sami Boutros ,  Benjamin C. Basler ,  Ronghua Zhang ,  Jerome Catrouillet

IPC: G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26 ,  H04L12/24 ,  H04L12/761 ,  H04L29/12 ,  H04L12/46 ,  H04L12/713 ,  H04L12/707 ,  H04L12/703 ,  H04L29/14

Abstract: Some embodiments provide a method for providing redundancy and fast convergence for modules operating in a network. The method configures modules to use a same anycast inner IP address, anycast MAC address, and to associate with a same anycast VTEP IP address. In some embodiments, the modules are operating in an active-active mode and all nodes running modules advertise the anycast VTEP IP addresses with equal local preference. In some embodiments, modules are operating in active-standby mode and the node running the active module advertises the anycast VTEP IP address with higher local preference.

公开(公告)号：US10447421B2

公开(公告)日：2019-10-15

申请号：US15753903

申请日：2016-05-13

Applicant: SK TELECOM CO., LTD.

Inventor： Chang Soon Choi ,  Min Soo Na

IPC: H04J14/02 ,  H04J3/14

Abstract: The present disclosure provides a fronthaul control device which can adjust a center wavelength of an optical signal to changeably control allocation of an optical wavelength band; an operating method of the fronthaul control device; a program for controlling allocation of an optical wavelength band; and a computer-readable recording medium in which the program is recorded.

公开(公告)号：US20190313266A1

公开(公告)日：2019-10-10

申请号：US15945469

申请日：2018-04-04

Applicant: Rohde & Schwarz GmbH & Co. KG

Inventor： Corbett Rowell ,  Vincent Abadie

IPC: H04W24/06 ,  G01R29/08 ,  H04B17/10 ,  H04J3/14

Abstract: A measurement system is described, comprising a signal processing equipment, an antenna unit, a device under test, and a resonant cavity surrounding the antenna unit and the device under test. The signal processing equipment is at least one of a signal generation equipment and a signal measurement equipment. The resonant cavity has a resonance for a frequency corresponding to at least one of the frequency used for testing the device under test and its multiples. The device under test is located within the resonant cavity such that a standing wave is established inside the resonant cavity during testing the device under test. The standing wave has an electric field distribution with maxima and minima. The antenna unit is located within the resonant cavity such that the antenna unit is assigned to a maximum of the electric field. Further, a method for testing a device under test is described.

公开(公告)号：US20190306035A1

公开(公告)日：2019-10-03

申请号：US16443122

申请日：2019-06-17

Applicant: Cisco Technology, Inc.

Inventor： Ellen Christine Scheib ,  Ali Parandehgheibi ,  Omid Madani ,  Vimalkumar Jeyakumar ,  Navindra Yadav ,  Mohammadreza Alizadeh Attar

IPC: H04L12/26 ,  G06F16/29 ,  G06F16/2457 ,  G06F16/9535 ,  G06F16/28 ,  G06F16/248 ,  G06N20/00 ,  G06F21/56 ,  G06F21/55 ,  H04L29/06 ,  H04L12/813 ,  H04L9/32 ,  H04L9/08 ,  H04L12/721 ,  G06F21/53 ,  H04L12/24 ,  H04L12/851 ,  H04L12/725 ,  H04L12/823 ,  H04L29/12 ,  H04J3/14 ,  H04J3/06 ,  H04W72/08 ,  H04L1/24 ,  H04L29/08 ,  G06F3/0484 ,  H04L12/723 ,  H04L12/833 ,  H04L12/741 ,  H04L12/801 ,  H04W84/18 ,  H04L12/715 ,  H04L12/841 ,  G06T11/20 ,  G06F3/0482 ,  G06F16/11 ,  G06F16/17 ,  G06F16/13 ,  G06N99/00 ,  G06F16/16 ,  G06F16/23 ,  G06F16/174 ,  G06F9/455

Abstract: Systems and methods are provided for automatically discovering applications/clusters in a network and mapping dependencies between the applications/clusters. A network monitoring system can capture network flow data using sensors executing on physical and/or virtual servers of the network and sensors executing on networking devices connected to the servers. The system can determine a graph including nodes, representing at least the servers, and edges, between pairs of the nodes of the graph indicating the network flow data includes one or more observed flows between pairs of the servers represented by the pairs of the nodes. The system can determine a dependency map, including representations of clusters of the servers and representations of dependencies between the clusters, based on the graph. The system can display a first representation of a first cluster of the dependency map and information indicating a confidence level of identifying the first cluster.

公开(公告)号：US10382155B2

公开(公告)日：2019-08-13

申请号：US15895959

申请日：2018-02-13

Applicant: Metaswitch Networks Ltd

Inventor： Colin Tregenza Dancer

IPC: H04J3/14 ,  H04J3/06 ,  H04L12/26 ,  H04L7/00

Abstract: In a telecommunications network including at least a user device and a network node separated by at least a packet-switched part of the telecommunications network, the user device including a primary jitter buffer having a constant packet play-out rate, the network node including a secondary jitter buffer, incoming packets destined for the user device are received and passed through the secondary jitter buffer of the network node downstream towards the primary jitter buffer of the user device. The departure times of packets passing through the secondary jitter buffer of the network node downstream towards the primary jitter buffer of the user device are monitored. On the basis of the monitoring and one or more known characteristics of the primary jitter buffer, an estimate of a current state of the primary jitter buffer is maintained. Operation of the secondary jitter buffer is dynamically controlled according to the maintained estimate.