公开(公告)号：US20210306724A1

公开(公告)日：2021-09-30

申请号：US17344536

申请日：2021-06-10

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Gang XIE ,  Hao LI ,  Haomian ZHENG ,  Zhe LIU

IPC: H04Q11/00

Abstract: This application provides example methods for establishing a service path in a transport network and example systems. One example method includes, obtaining, by an automatically switched optical network (ASON) first node, a service path computation result path. The service path includes the ASON first node, an ASON last node, and at least one first edge network node. The method also includes sending, by the ASON first node, a path establishment request message to a downstream node. The path establishment request message carries cross-connection configuration information of the ASON last node and the at least one first edge network node. The method further includes receiving, by the ASON first node, a path establishment response message of the downstream node. The path establishment response message indicates that cross-connection configuration for the ASON last node and the at least one first edge network node is complete.

公开(公告)号：US20220263571A1

公开(公告)日：2022-08-18

申请号：US17733199

申请日：2022-04-29

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Gang XIE ,  Hao LI ,  Xianlong LUO ,  Min ZHAO ,  Haomian ZHENG

IPC: H04B10/032

Abstract: A path protection method includes receiving, by a source node of a first path, a path event notify message from a first node on the first path. The path event notify message includes indication information that the first path is predicted to fail. The path protection method further includes obtaining, by the source node, information about a predicted protection path. The information about the predicted protection path includes resource information of a second path useable to protect a service on the first path. The first path and the second path include the source node and a same sink node. The path protection method further includes storing, by the source node, the resource information of the second path.

公开(公告)号：US20220224640A1

公开(公告)日：2022-07-14

申请号：US17705998

申请日：2022-03-28

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Yixiao CHEN ,  Haoyu FENG ,  Kaixuan YANG ,  Gang XIE ,  Hao LI

IPC: H04L45/50 ,  H04L45/28

Abstract: The disclosed apparatuses and methods are directed to data plane restoration in a network. A method comprises receiving a label-switched path (LSP) failure notification indicating a failure in a network; generating, by a node of the network, a fast-restoration (FR) message and transmitting the FR message to a second node of the message forwarding path. The FR message comprises: a plurality of forwarding instruction objects (FIOs) having forwarding instructions for the FR message for each node of a message forwarding path; and a plurality of label-switched path objects (LSPOs) having a restoration LSP data for each node of a protection detour path. Another method comprises receiving the FR message; generating a modified FR message based on the FR message; and transmitting the modified FR message to another node of the message forwarding path based on the FIO, prior to processing the FR message by the node.