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Katsuhiro SHIMANO Akio SAHARA Kazuhiro NOGUCHI Masafumi KOGA Yoshihiro TAKIGAWA Ken-ichi SATO
This paper describes the requirements for fault recovery on photonic networks and proposes a fast restoration scheme for recovering optical networks. The proposed scheme is a type of pre-assignment restoration. The features of the scheme are that it is suitable for multi-recovery classes aimed at fine control of the optical paths and that it establishes harmonization between restoration control and distributed network control such as in IP networks. The scheme is implemented on Photonic multi protocol label switching (MPLS) routers. A restoration demonstration was performed and recovery was achieved within 500ms in the optical layer.
Kiyoshi TANAKA Katsuhiro SHIMANO Kyo INOUE Shigeru KUWANO Takeshi KITAGAWA Kimio OGUCHI
This paper describes a new optical label switching technique; wavelength and pilot tone frequency are combined to form labels that are used to control transport network routing. This technique is very attractive for achieving simple nodes that offer extremely rapid forwarding. Experimental results on the discrimination of optical labels and all-optical label conversion are also presented.
Kiyoshi TANAKA Katsuhiro SHIMANO Kyo INOUE Shigeru KUWANO Takeshi KITAGAWA Kimio OGUCHI
This paper describes a new optical label switching technique; wavelength and pilot tone frequency are combined to form labels that are used to control transport network routing. This technique is very attractive for achieving simple nodes that offer extremely rapid forwarding. Experimental results on the discrimination of optical labels and all-optical label conversion are also presented.