D8PSK/IRZ quadrature modulation-based optical label switching method and system

Abstract

The invention relates to a differential 8-level phase-shift keying / inverse return zero (D8PSK / IRZ) quadrature modulation-based optical label switching method and a D8PSK / IRZ quadrature modulation-based optical label switching system. The method comprises the following steps of: deserializing payload in optical packet data to form three paths of signals, performing differential pre-coding on the three paths of signals, respectively loading to three phase modulators and performing phase modulation to generate a D8PSK signal; loading label in the optical packet data to the amplitude of the D8PSK signal in an IRZ modulation mode to generate a D8PSK / IRZ quadrature modulation signal; and sending the D8PSK / IRZ quadrature modulation signal. Under the condition of not increasing any additional resource consumption, the transmission rate of an optical packet data signal is increased, and the utilization rate of bandwidth resources of a network and the modulation extinction ratio of a quadrature signal are improved, so that the transmission capacity and performance of the network are improved.

Description

technical field [0001] The invention relates to the field of optical communication, in particular to a method and system for optical label switching based on differential eight-phase shift keying / inversion return-to-zero (D8PSK / IRZ) quadrature modulation. Background technique [0002] Faced with the increasing growth of IP-based packet services in the future, the IP over WDM optical network that uses the wavelength division multiplexing system to carry IP services has become an inevitable choice for the optical transmission network to adapt to the rapid development of IP data services. Therefore, how to implement at the optical network level Packet switching becomes an urgent problem to be solved. [0003] Optical Packet Switching (OPS, Optical Packet Switching) is proposed under this background. Optical Label Switching (OLS, Optical Label Switching) technology, as a specific implementation of Optical Packet Switching Network, integrates the flexibility of electrical informa...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to overcome the disadvantages of the existing orthogonal optical label switching system, such as complex design and operation, low bandwidth utilization rate, low modulation extinction ratio has a great impact on system performance, and high difficulty in implementation, and provides a The new orthogonal optical label switching method and system make it simple in structure, with high bandwidth resource utilization and signal modulation extinction ratio, thereby improving network transmission capacity and performance

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