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Full optical packet switching node structure for supporting burst or non-burst businesses

A technology of optical packet switching and node structure, applied in the field of optical communication, can solve problems such as uneconomical and effective, and achieve the effects of large buffer capacity, reduced volume and cost, and reduced number of wavelength converters

Inactive Publication Date: 2004-02-04
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] For non-bursty services (random services), the same amount of FDL is more effective and cheaper than tunable wavelength converters. Therefore, for non-bursty services, the above two solutions are better than using delay lines to solve conflict, not cost-effective

Method used

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  • Full optical packet switching node structure for supporting burst or non-burst businesses
  • Full optical packet switching node structure for supporting burst or non-burst businesses
  • Full optical packet switching node structure for supporting burst or non-burst businesses

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Embodiment Construction

[0027] The specific implementation of the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0028] figure 1 It is a schematic diagram of the switching node structure of the present invention. If the switching structure of the present invention supports N input fiber ports and N output fiber ports, each fiber can support W wavelength channels, denoted as {λ 1 ,...λ w}, then the whole switching structure of the present invention consists of N 1×W optical wavelength division multiplexers, N W×1 optical wavelength division multiplexers, and one (WN+R+M)×(WN+R+M) non-blocking An optical switch matrix, R tunable full-wavelength converters, and M optical fiber delay lines. Among them, M fiber delay lines form a degenerate structure, that is, the delay time length of the M fiber delay lines changes continuously, and the step size is T, where T is the duration of a time slot. The delay line with the shortes...

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PUM

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Abstract

A full optical structure for exchanging nodes in grouping, which supports the abrupt and non-abrupt business is a symmetric structure consisting of N numbers of 1XW light-wave decomposing multiplexer, N numbers of Wx1 light-wave decomposing multiplexer, one of (WN+R+M)x(WN+R+M) full optical unblocking exchanging matrix module, R numbers of full wave-length converter and M numbers of optical fiber delaying line, wherein N is the number of input / output optical fiber port, W is the number of wave-length channel which can be transmitted at each port, M number of delaying line constitute a structure of degenerate form, the shortest or the longest delaying line provides the buffer-storing time T or MT to the grouping respectively.

Description

Technical field: [0001] The invention relates to an all-optical packet switching node structure, which solves the problem of the destination port conflict of optical packets. The switching structure can be applied to the environments of non-bursty services (such as traditional circuit-switched services) and burst services (such as IP services), and belongs to the field of optical communication technology. Background technique: [0002] At present, the rapid development of the IP-based Internet makes the communication network gradually develop from a circuit-switching-based, optimized way of carrying voice services to a packet-based switching, optimized way of carrying data services. The application of video-on-demand, IP conferencing and other new multimedia services puts forward higher requirements on the transmission capacity of the communication infrastructure network. Dense Wavelength Division Multiplexing (DWDM) and Erbium-doped Fiber Amplifier (EDFA) technologies deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/00H04J14/02H04Q3/52H04Q11/00
Inventor 张治中曾庆济程方雒江涛曹俊文
Owner SHANGHAI JIAO TONG UNIV
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