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 el...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.展开更多
A contention resolution scheme.P-cycle auto-switching（PCAS）.is proposed in wavelength-switched optical networks（WSONs） based on generalized multi-protocol label switching（GMPLS） to solve backward blocking.This s...A contention resolution scheme.P-cycle auto-switching（PCAS）.is proposed in wavelength-switched optical networks（WSONs） based on generalized multi-protocol label switching（GMPLS） to solve backward blocking.This system permits the preferable request and switches the other to a backup path generated by the P-cycle.Simulation results show that the PCAS scheme is effective in mitigating backward blocking, especially under concentrated load.展开更多
A quality-of-service（QoS）aware scheme,called precautionary performance monitoring,is proposed to solve the optical impairments and congestion control in coherent optical orthogonal frequency division multiplexed（CO...A quality-of-service（QoS）aware scheme,called precautionary performance monitoring,is proposed to solve the optical impairments and congestion control in coherent optical orthogonal frequency division multiplexed（CO-OFDM）networks.The centralized path computation element（PCE）extensions based on the QoS level are applied to optical performance monitoring in this letter.展开更多
基金supported in part by the National"863"Program(No.2007AA01Z252)the National Natural Science Foundation of China(Nos.60772024 and 60711140087)+4 种基金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)
文摘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 of China(No.2007AA01Z252)the National Natural Science Foundation of China(Nos.60772024 and 60711140087)+4 种基金the National"973"Program of China (No.2007CB310705)the Specialized Research Fund for the Doctoral Program of Higher Education(SRFDP) of Ministry of Education of China(No.200800130001)the Program for Changjiang Scholars and Innovative Research Team(PCSIRT,No.IRT0609)the International S&T Cooperation Program of China(ISTCP,No. 2006DFA11040)the New Century Excellent Talents in University(NCET,No.06-0090)
文摘A contention resolution scheme.P-cycle auto-switching（PCAS）.is proposed in wavelength-switched optical networks（WSONs） based on generalized multi-protocol label switching（GMPLS） to solve backward blocking.This system permits the preferable request and switches the other to a backup path generated by the P-cycle.Simulation results show that the PCAS scheme is effective in mitigating backward blocking, especially under concentrated load.
基金supported by the National"973"Program of China under Grant No.2011CB302702
文摘A quality-of-service（QoS）aware scheme,called precautionary performance monitoring,is proposed to solve the optical impairments and congestion control in coherent optical orthogonal frequency division multiplexed（CO-OFDM）networks.The centralized path computation element（PCE）extensions based on the QoS level are applied to optical performance monitoring in this letter.
