公开(公告)号：US11563640B2

公开(公告)日：2023-01-24

申请号：US16219290

申请日：2018-12-13

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Gagan Choudhury ,  Simon Tse ,  Narayan Padi ,  Alvin Goddard ,  Lynn Rivera

IPC: H04L41/12 ,  H04L45/00 ,  H04L9/40 ,  H04L41/00 ,  H04L43/0811 ,  H04L43/028

Abstract: A parser model may be used with software-defined applications or controllers. A network topology may be detected and based on the change in the network topology, a network device may filter certain network data traffic for processing by a software-defined network controller.

公开(公告)号：US11303565B2

公开(公告)日：2022-04-12

申请号：US17068786

申请日：2020-10-12

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Gagan Choudhury ,  Gaurav Thakur ,  Simon Tse ,  Kathleen Meier-Hellstern

IPC: H04B10/00 ,  H04L45/00 ,  H04L45/64 ,  H04L43/0882 ,  H04Q11/00 ,  H04L45/50

Abstract: A processing system including at least one processor may obtain traffic measurements for end-to-end paths in a telecommunication network, calculate traffic estimates for the end-to-end paths in future time periods based on the traffic measurements in accordance with at least one machine learning model, calculate traffic estimates for primary paths in the telecommunication network based upon the traffic estimates for the end-to-end paths, compute a backup path configuration for a primary path of the telecommunication network for the future time periods based upon the traffic estimates for the primary paths in the future time periods, detect a change in the backup path configuration for the primary path in a future time period based upon the computing, and adjust a backup path in accordance with the backup path configuration when the change in the backup path configuration is detected.

公开(公告)号：US20200007629A1

公开(公告)日：2020-01-02

申请号：US16021363

申请日：2018-06-28

Applicant: AT&T Intellectual Property I, L.P.

Inventor： Simon Tse ,  Alvin Goddard ,  Catherine Ferraro ,  Gagan Choudhury ,  Narayan Padi ,  Lynn Rivera

IPC: H04L29/08 ,  H04L12/26 ,  H04L12/717 ,  H04L12/54

Abstract: In one example, a method for monitoring the state and health of a centralized software defined networking controller includes detecting, by a standby software defined networking controller, when a number of path computation client sessions reported by an active software defined networking controller fails to match an expected number; verifying, by the standby software defined networking controller after expiration of a predefined delay implemented after the detecting, that the number of path computation client sessions reported by the active software defined networking controller still fails to match the expected number; and assuming, by the standby software defined networking controller after the verifying, a role of the active software defined networking controller.

公开(公告)号：US20190190814A1

公开(公告)日：2019-06-20

申请号：US15845335

申请日：2017-12-18

Applicant: AT&T Intellectual Property I, L.P. ,  Cornell University

Inventor： Shih-Hao Tseng ,  Ao Tang ,  Simon Tse ,  Gagan Choudhury

IPC: H04L12/755 ,  H04L12/715 ,  H04L12/703 ,  H04L12/741

CPC classification number: H04L45/021 ,  H04L45/28 ,  H04L45/42 ,  H04L45/44 ,  H04L45/54 ,  H04L45/56 ,  H04L45/64

Abstract: Concepts and technologies disclosed herein are directed to routing stability in a hybrid software-defined networking (“SDN”) network in which control plane functionality is shared between a centralized SDN controller and a plurality of local routers. The controller can collect data plane messages from the plurality of local routers, extract information corresponding to source nodes and edges of a graph representative of the hybrid SDN network, and store the information as entries in a table. The controller can identify any outdated entries and remove any outdated entries from the table. The controller can obtain recovered information missing from the information collected from the data plane messages. The controller also can calculate an effective capacity of the edges. The controller can then generate a stable routing pattern based upon the recovered information and the effective capacity. The controller can deploy the stable routing pattern in the hybrid SDN network.

公开(公告)号：US20160099865A1

公开(公告)日：2016-04-07

申请号：US14508699

申请日：2014-10-07

Applicant: AT&T Intellectual Property I, L.P.

Inventor： John Gregory Klincewicz ,  Gagan Choudhury ,  Kathleen S. Meier-Hellstern

IPC: H04L12/703 ,  H04L12/26 ,  H04L12/891 ,  H04L12/707

CPC classification number: H04L45/28 ,  H04L43/0817 ,  H04L45/22 ,  H04L47/41

Abstract: Methods, apparatus, systems and articles of manufacture (e.g., physical storage media) to reroute tunnel traffic in a network are disclosed. Example methods disclosed herein include, in response to detecting an event associated with routing first traffic in the network, determining a plurality of paths to carry respective traffic for a plurality of tunnels between pairs of routers in the network, the plurality of paths being determined based on a quality metric characterizing an aggregate tunnel bandwidth to be carried by the plurality of paths for the plurality of tunnels. Such disclosed example methods also include sending first routing information describing the plurality of paths to the routers in the network to cause the routers to route the respective traffic for the plurality of tunnels using the plurality of paths.

Abstract translation: 公开了在网络中重新路由隧道业务的方法，装置，系统和制品（例如物理存储介质）。 本文公开的示例方法包括：响应于检测到与在网络中路由第一业务相关联的事件，确定多个路径以携带网络中的路由器对之间的多个隧道的相应业务，所述多个路径基于 关于表征由多个隧道的多个路径承载的聚合隧道带宽的质量度量。 这种公开的示例方法还包括将描述多条路径的第一路由信息发送到网络中的路由器，以使路由器使用多条路径路由多条隧道的相应业务。