Invention Grant
- Patent Title: Hierarchical tree-based protection scheme for mesh networks
- Patent Title (中): 网状网络的分层树型保护方案
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Application No.: US11617296Application Date: 2006-12-28
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Publication No.: US07774448B2Publication Date: 2010-08-10
- Inventor: Shahram Shah-Heydari
- Applicant: Shahram Shah-Heydari
- Applicant Address: US MD Linthicum
- Assignee: Ciena Corporation
- Current Assignee: Ciena Corporation
- Current Assignee Address: US MD Linthicum
- Agency: Blake, Cassels & Graydon LLP
- Agent Kent Daniels
- Main IPC: G06F15/177
- IPC: G06F15/177

Abstract:
In a hierarchical tree-based protection scheme, a node in a mesh network is designated as a root node of a spanning hierarchical protection tree and subsequently invites each adjacent node to become its child within the tree. If the inviting node provides a more capacious protection path to the root node than is currently enjoyed by the invitee, the invitee designates the inviting node as its primary parent and assumes a new tree position. Otherwise, the invitee designates the inviting node as a backup parent. A node assuming a new tree position invites all adjacent nodes except its parent to become its child. The invitations propagate throughout the network until a spanning hierarchical protection tree is formed. Upon a subsequent failure of a straddling link, the tree may be used to re-route data. Further, given a tree link failure, protection switching is quickly achieved at a disconnected node through use of a backup parent as the new primary parent. Dynamic tree reconfiguration in the event of network topology changes may be limited to the network area surrounding the change.
Public/Granted literature
- US20070104120A1 HIERARCHICAL TREE-BASED PROTECTION SCHEME FOR MESH NETWORKS Public/Granted day:2007-05-10
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