摘要
Current generalized multi-protocol label switching （GMPLS） standards do not include adequate models for wavelength-switched optical networks （WSON） in recovery mechanisms. In this letter, GMPLS/path computation element （PCE） extensions are applied for the restoration of the lightpaths disrupted by collision or optical impairment. A reserved deflection routing scheme is proposed to achieve fast restoration. It uses the expanded PCE component to compute and assign the backup paths for lightpath recovery. Numerical results demonstrate that this scheme is effective and low cost.
Current generalized multi-protocol label switching （GMPLS） standards do not include adequate models for wavelength-switched optical networks （WSON） in recovery mechanisms. In this letter, GMPLS/path computation element （PCE） extensions are applied for the restoration of the lightpaths disrupted by collision or optical impairment. A reserved deflection routing scheme is proposed to achieve fast restoration. It uses the expanded PCE component to compute and assign the backup paths for lightpath recovery. Numerical results demonstrate that this scheme is effective and low cost.
基金
supported in part by the National"863"Program(No.2007AA01Z252)
the National Natural Science Foundation of China(Nos.60772024 and 60711140087)
the National"973"Program of China (No.2007CB310705)
the Specialized Research Fund for the Doctoral Program of Higher Education of MOE (No.200800130001)
the Program for Changjiang Scholars and Innovative Research Team(No.IRT0609)
the International S&T Cooperation Program of China(No. 2006DFA11040)
the New Century Excellent Talents in University(No.06-0090)
