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:
Dec. 25, 2007
Filed:
Feb. 25, 2003
Eiji Oki, Tokyo, JP;
Wataru Imajuku, Yokohama, JP;
Kohei Shiomoto, Iruma, JP;
Naoaki Yamanaka, Tokyo, JP;
Daisaku Shimazaki, Tokorozawa, JP;
Naohide Nagatsu, Yokosuka, JP;
Yoshihiro Takikawa, Yokosuka, JP;
Eiji Oki, Tokyo, JP;
Wataru Imajuku, Yokohama, JP;
Kohei Shiomoto, Iruma, JP;
Naoaki Yamanaka, Tokyo, JP;
Daisaku Shimazaki, Tokorozawa, JP;
Naohide Nagatsu, Yokosuka, JP;
Yoshihiro Takikawa, Yokosuka, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Abstract
A multi-layer photonic network and nodes used therein are provided. The multi-layer photonic network comprises a packet network which performs switching and transfer in packet units, and a photonic network comprising optical transmission lines and photonic switches, and which accommodates the packet network. The multi-layer photonic network also has a two layer structure of optical wavelength links (O-LSPs) and packet links (E-LSPs). The O-LSPs are constituted by the optical transmission lines and comprise optical wavelength switching capability (LSC) which is capable of switching in optical wavelength units and packet switching capability (PSC) which is capable of switching in packet units at both their ends. The E-LSPs include the O-LSPs and PSCs at both their ends. Each node includes a section for automatically establishing an O-LSP according to an establishment request for an E-LSP while taking account of path information including path cost, resource consumption, and traffic quantity.