The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 2010
Filed:
Jul. 19, 2005
Bhavesh Nisar, Alpharetta, GA (US);
Qin Wan, Alpharetta, GA (US);
Ping Pan, San Jose, CA (US);
Hon Tat Ho, Sunnyvale, CA (US);
Raghu Arja, Cupertino, CA (US);
Bhavesh Nisar, Alpharetta, GA (US);
Qin Wan, Alpharetta, GA (US);
Ping Pan, San Jose, CA (US);
Hon Tat Ho, Sunnyvale, CA (US);
Raghu Arja, Cupertino, CA (US);
Ciena Corporation, Linthicum, MD (US);
Abstract
The present invention provides methods and apparatuses for interfacing high-layer applications to Link Capacity Adjustment Scheme (LCAS) on Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) edge nodes. These applications include high-level control protocols, such as Generalized Multiprotocol Label Switching (GMPLS) and Optical Switching and Routing Protocol (OSRP), and user-initiated cross-connect creation and termination. The present invention provides a mechanism that is capable of mapping SONET/SDH connections to Virtual Concatenated Groups (VCGs), thus enabling an efficient interface for operators to control and manage the connections via LCAS. As part of the mechanism, the existing LCAS protocol state machine is enhanced such that the operators can shut down bi-directional SONET/SDH flows from a single edge node, as opposed to from both source and sink nodes, as provided for by existing specifications.