Elastic optical group exchanging method and node equipment based on dicyclic all-optical buffer storage

A technology of optical packet switching and optical buffer, applied in the direction of selection device, data switching network, electromagnetic wave transmission system, etc., to reduce workload, improve utilization rate and transmission speed, and overcome competition and congestion

Inactive Publication Date: 2004-09-08
BEIJING JIAOTONG UNIV
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Problems solved by technology

[0010] The technical solution adopted by the present invention to solve the problems of the existing elastic packet switching method and node device based on the electric buffer is as follows

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  • Elastic optical group exchanging method and node equipment based on dicyclic all-optical buffer storage
  • Elastic optical group exchanging method and node equipment based on dicyclic all-optical buffer storage
  • Elastic optical group exchanging method and node equipment based on dicyclic all-optical buffer storage

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Embodiment Construction

[0032] The topological structure of the flexible optical packet switching ring network O-RPR based on the optical buffer proposed by the present invention is the same as the electrical RPR topological structure, which is still a double-ring structure. Such as Figure 12 shown.

[0033] A single-channel structure of an elastic optical packet switching node device based on a double-ring all-optical buffer is shown in FIG. 1 .

[0034] The elastic optical packet switching node device based on the dual-ring all-optical buffer includes: receiving data frame buffer and frame header information reading module, offloading module of data frames passing through the node, downlink data frame receiving module, transmission The buffering and forwarding module of the data frame passing through the node, the buffering and sending module of the data frame on the road, and the control module.

[0035] The received data frame buffer and frame header information reading module 1 includes: an o...

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Abstract

The present invention provides grouped exchange method and equipment with buffering time adjustable all-optical buffer storage in elastically optical grouped cyclic network. Frame structure of unequal frame header rate and net load rate is adopted, optical / electric / optical conversion on frame header, rather than whole optical data frame, from the cycle is completed to obtain routing information, and the net load of the data frame is buffer stored in optical buffer storage. Based on the routing information of the frame header, it is determined whether the frame is made down from the present node or transferred to the downstream of the cyclic network. Utilizing the read / write controllable dicyclic all-optical buffer storage and the control algorithm to regulate the buffer storage time can overcome competition between the re-transmitted data and the data transmitted to the cyclic network, eliminate optical data flow conversion bottle neck, reduce obstruction and raise bandwidth utilization.

Description

technical field [0001] The invention relates to an optical packet switching method and a node device of an all-optical communication network, in particular to a switching method and a node device of an all-optical packet switching elastic packet ring network using the all-optical cache technology. Background technique [0002] The all-optical network with optical switching as the core can solve the electronic rate bottleneck problem of switching, so it has received widespread attention. The wavelength-switched all-optical network that has emerged in recent years uses the wavelength as the switching granularity. It is essentially an analog switching. The bandwidth utilization rate is not high, the switching granularity is too large, the wavelength of the switching resource is limited, and there are problems such as competition and congestion. To this end, a new all-optical switching technology has been proposed in recent years—all-optical packet switching OPS: Optical Packet ...

Claims

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Application Information

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IPC IPC(8): H04L12/701H04L12/861H04Q3/52
Inventor 吴重庆盛新志
Owner BEIJING JIAOTONG UNIV
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