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

A quadrature modulation, one-way technology, applied in the field of optical communication, can solve the problems of low bandwidth utilization, large impact on system performance, complex design and operation, etc., to improve network transmission capacity and performance, improve modulation extinction ratio, increase The effect of high transfer rates

Inactive Publication Date: 2011-05-18
BEIJING UNIV OF POSTS & TELECOMM
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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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  • D8PSK/IRZ quadrature modulation-based optical label switching method and system
  • D8PSK/IRZ quadrature modulation-based optical label switching method and system
  • D8PSK/IRZ quadrature modulation-based optical label switching method and system

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Embodiment Construction

[0063] figure 1 It is a flow chart of the optical label switching method based on differential eight-phase shift keying / reverse return-to-zero quadrature modulation of the present invention. Combine now figure 1 , the present invention is based on differential eight-phase shift keying / reverse return-to-zero quadrature modulation optical label switching method is described, specifically as follows:

[0064] Step 11: Load the payload (Payload) in the optical packet data to the phase of the optical carrier through the differential eight-level phase shift keying modulation method to generate a differential eight-level phase shift keying signal (D8PSK: Differential8-Level Phase-Shift Keying) .

[0065] In this step, the method of loading the payload onto the optical carrier phase using a differential eight-phase shift keying modulation method includes:

[0066] Step 111, carry out serial-to-parallel conversion to the payload in the optical packet data through a field-programmabl...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/22H04B10/155H04B10/158H04Q11/00
Inventor 张丽佳忻向军张琦王拥军马建新赵同刚饶岚尹霄丽桑新柱余重秀王葵如张晓磊刘博张星原全新刘皎
Owner BEIJING UNIV OF POSTS & TELECOMM
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