Edge-wavelength-switching system, associated optical network, and failover recovery method thereof

US11750318B1 · kind B1 · utility

Assignee

• Cable Television Laboratories, Inc. · US

Inventors

• Luis Alberto Campos · Superior, US
• Jing Wang · Broomfield, US
• Zhensheng Jia · Superior, US
• Jim Campanell · Louisville, US
• Carmela Stuart · Broomfield, US
• Haipeng Zhang · Santa Clara, US

Key dates

• Filing date: Mar 8, 2022
• Grant date: Sep 5, 2023
• Expiry date: Mar 8, 2042

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04Q2213/1301
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

An edge wavelength-switching system includes an optical switch and a wavelength selective switch. The optical switch includes a west hub-side port, an east hub-side port, a west local-side port, and an east local-side port. The wavelength selective switch includes (i) a multiplexed port optically coupled to the west local-side port and (ii) a bypass port optically coupled to the east local-side port, and (iii) a plurality of demultiplexed ports. An optical network includes a network hub including an M-by-N1 wavelength-selective switch, N1>M≥1, a first network node, and a second network node. Each of the first and second network nodes includes a respective edge wavelength-switching system. The network hub, the first network node, and the second network node are optically coupled.