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Optical cross-connect device

A technology of optical cross-connection and interconnection, which is applied in the direction of selection device, selection device of multiplexing system, optical multiplexing system, etc., can solve problems such as waste and meaningless routing of optical signals, and achieve low cost Effect

Active Publication Date: 2021-08-06
NAGOYA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because it does not make sense to route optical signals at the same node, and the paths prepared for such switching are wasted

Method used

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  • Optical cross-connect device
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] In this embodiment, an algorithm will be described in which a new optical fiber is connected based on the usage rate of an existing optical fiber at the stage of adding an optical fiber. In this embodiment, in the OXC device, when the input optical fiber and the output optical fiber are connected by an internal path, whether or not to connect is determined based on the usage rate of the existing optical fiber. In the prior art, all input optical fibers and output optical fibers are completely connected, and as long as the number that can be handled is not exceeded, there will be no contention in path setting. On the other hand, in the OXC device of the present disclosure, all input optical fibers and output optical fibers are not completely connected. However, if the threshold value of the usage rate of the optical fiber for judging the connection of the internal path is appropriately selected, the occurrence of contention in path setting can be suppressed very little. ...

Embodiment 2

[0133] Figure 20 It is a diagram showing an algorithm for adding a new optical fiber and connecting inside the OXC device in Example 2 in the OXC device of the present disclosure. It shows the process of adding an optical fiber from the initial state under the condition that the central node 1730 and the target node 1731 are connected by the input optical fiber 1732 and the output optical fiber 1733 . In the following, S denotes a step.

[0134] S1700: Generate an additional delivery amount.

[0135] S1702: Assuming that the OXC has a conventional structure, temporarily accommodate the additional route in the network (adding an optical fiber to each link as necessary).

[0136] S1704: Remove the temporarily accommodated path from the network.

[0137] S1706: Make OXC a new structure.

[0138] S1707: Sort the optical fibers in ascending order of establishment numbers.

[0139] S1710: Select an unselected input optical fiber.

[0140] S1712: Select an unselected output op...

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Abstract

In the path and selection structure OXC device in the prior art, when the number of ports is 20, the whole device needs 120 WSSs with a 1×9 structure. The path and selection type OXC device with more than 20 ports requires a large number of expensive WSSs, and thus is not feasible in terms of cost. It is impossible to expand to match the increase in the traffic volume of nodes, and it lacks flexible scalability, making it difficult to implement reasonable network operation including economic efficiency. The OXC device of the present disclosure can significantly reduce the cost of the device by utilizing a smaller-scale WSS than the prior art and connecting the WSS internally from a viewpoint different from the prior art regardless of the number of input ports and the number of output ports of the device. lowered. In addition, it is possible to expand the OXC device flexibly and economically, only at the stage of need, and without limitation, corresponding to the initial state of the delivery amount and the subsequent increase.

Description

technical field [0001] The invention relates to an optical cross-connect arrangement for use at a node of an optical communication network. Background technique [0002] The optical communication technology using optical fiber as the transmission medium extends the signal transmission distance and enables the construction of large-scale optical communication networks. In recent years, Internet communication via ADSL (Asymmetric Digital Subscriber Line) lines or FTTH (Fiber To The Home: Fiber To The Home) lines has become widespread, and portable wireless terminals via wireless communication lines have reached commercialization. situation. Accompanied by this, whether in wired or wireless networks, the amount of communication transmission is increasing explosively, and the requirements for large capacity, high speed, high functionality and low power consumption of communication networks are getting higher and higher. . Recently, fixed-rate music services using streaming an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/27H04Q3/52
CPCH04Q11/0005H04Q2011/0016H04B10/27H04J14/0209H04J14/0217H04Q11/0003
Inventor 佐藤健一长谷川浩森洋二郎佐藤晃辅
Owner NAGOYA UNIVERSITY