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Optical burst receiving method and device in OBS (optical burst switching) network

An optical burst switching, optical burst technology, applied in the field of optical communication, can solve problems such as increasing cost and increasing development difficulty, and achieves the effects of fast response speed, improved reception speed and accuracy, and high precision

Inactive Publication Date: 2015-06-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If you want to further increase the burst receiving rate and reduce the response delay, you must further increase the implementation complexity of the circuit, which not only increases the difficulty of development, but also increases the cost

Method used

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  • Optical burst receiving method and device in OBS (optical burst switching) network
  • Optical burst receiving method and device in OBS (optical burst switching) network
  • Optical burst receiving method and device in OBS (optical burst switching) network

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Embodiment

[0076] An edge node (connected to an 8-wavelength optical link) on the OBS network is connected to the core node through an optical fiber, and 9 wavelengths are multiplexed on the optical fiber, λ0~λ8, of which λ0~λ7 are used to transmit bursts The data packet Burst, λ8 is used to transmit the burst control packet BHP. see Figure 5 , the core part of burst reception is composed of a demultiplexer, a core scheduler, and 8 burst reception modules. In the burst receiving module, the CPA and STA of the present invention are arranged; in the core scheduler, a BHP parsing module and OPP are arranged. Considering that for all eight burst receiving module nodes, the power value, decision threshold and optical signal source matching table in the OPP are exactly the same, so the present invention can be implemented by placing the OPP in the core scheduler.

[0077] When the system starts to work, with the continuous arrival of BHP and Burst, the OPP in the core scheduler obtains the ...

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Abstract

The invention relates to an optical burst receiving method and an optical burst receiving device in an OBS (optical burst switching) network. The method disclosed by the invention comprises the following steps: the characteristic parameters of an optical signal source are obtained through a received BHP (burst header packet); an OPP confirms whether the optical signal source is known based on a power prediction table thereof, if so, the OPP controls a CPA and an STA to enter into a designated receiving mode, and otherwise, the OPP controls the CPA and the STA to enter into an automatic receiving mode, wherein the automatic receiving mode is implemented through that the CPA automatically adjusts the received sensitive power range according to a received burst packet Burst, and feeds back power parameters to the OPP; the STA adjusts the decision threshold according to the received burst packet Burst, and feeds back decision threshold parameters to the OPP; and the OPP updates the power prediction table according to the power parameters and the decision threshold parameters matched with the optical signal source; and the designated receiving mode is implemented through that the OPP sets the power value of the CPA and the decision threshold of the STA according to the power prediction table. The invention also discloses an optical burst receiving device. The method and device disclosed by the invention are high in Burst receiving rate, rapid in response speed and high in precision, and achieve an effect of low cost.

Description

technical field [0001] The present invention relates to optical communication technology, in particular to an optical burst receiving method and device in an Optical Burst Switching (OBS for short) network. Background technique [0002] With the maturity and wide application of dense wavelength division multiplexing (Dense Wavelength Divided Multiplex, DWDM) optical transmission technology, there is an increasing demand for direct service switching at the optical layer. Therefore, all-optical "circuit" switching (i.e. The so-called wavelength routing) and packet switching have received widespread attention and are considered to be an effective way to overcome the bottleneck of the electrical switching rate. However, wavelength switching suffers from low bandwidth utilization, and packet switching is currently too difficult to implement. Therefore, Optical Burst Switching (OBS for short) technology proposed in recent years has attracted increasing attention. The performance ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/66
Inventor 张子为许都王晓东廖丹
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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