Invention Grant
- Patent Title: Control plane architecture for automatically switched optical network
- Patent Title (中): 用于自动切换光网络的控制平面架构
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Application No.: US10401552Application Date: 2003-03-31
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Publication No.: US07339889B2Publication Date: 2008-03-04
- Inventor: Yang Sup Lee , Dan Oprea
- Applicant: Yang Sup Lee , Dan Oprea
- Applicant Address: CA St. Laurent, Quebec
- Assignee: Nortel Networks Limited
- Current Assignee: Nortel Networks Limited
- Current Assignee Address: CA St. Laurent, Quebec
- Agency: Borden Ladner Gervais LLP
- Agent Jeffrey M. Measures
- Main IPC: G01R31/08
- IPC: G01R31/08

Abstract:
Methods and apparatus are provided for bandwidth management within Automatically Switched Optical Networks. An Optical Connection Controller (OCC) provides threshold based load balancing using an upper and a lower threshold for each port of a network element, and once port usage exceeds the upper threshold no more connections are allowed through the port until the port usage falls below the lower threshold. The OCC also minimizes fragmentation of a port so as to reduce the probability of call rejection as a result of fragmentation. The OCC also maintains a database of shortest paths between a network element and each destination, so that connections can be re-established quickly through alternate paths in the event of failure of a link or node. The OCC also provides the entire network with notification of a fault, thereby enhancing CR-LDP fault notification messaging.
Public/Granted literature
- US20030235153A1 Control plane architecture for automatically switched optical network Public/Granted day:2003-12-25
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