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Multistage annular fiber delay line cache structure

An optical fiber delay line and buffer technology, applied in the field of optical communication, can solve the problem of low utilization efficiency of FDL, and achieve the effect of convenient upgrading and expansion, reducing scale and complexity, and reducing difficulty.

Inactive Publication Date: 2010-03-17
赵芳芳
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  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the problem of low utilization efficiency of FDL in the current optical packet switching node, and propose a multi-level ring FDL cache structure

Method used

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  • Multistage annular fiber delay line cache structure
  • Multistage annular fiber delay line cache structure
  • Multistage annular fiber delay line cache structure

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Embodiment Construction

[0040] exist Figure 4 Among them, the 1st level, 2nd level, ..., the Kth level cache structures are sequentially connected together, and the cache structures of all levels are based on a 1 , a 2 ,...,a K Allocation and scheduling of cache units are performed respectively.

[0041] exist Figure 5 The composition of the single-level cache structure is shown in . The scheduling algorithms of each single-level cache structure are the same, and the specific operation is explained with the first level. After the optical packet enters the buffer structure from the Input port, the buffer structure is based on a 1 Control the optical switch matrix for switching. if a 1 = 0, then the optical packet is directly switched to Output port output; if a 1 >0, the optical packet is switched to port, in a clockwise direction through a 1 cache units after, via The port outputs from the Output port.

[0042] exist Figure 6 The composition of the cache unit is shown in . The op...

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Abstract

The invention relates to a multistage annular fiber delay line cache structure, which consists of a plurality of single-stage annular fiber delay line cache structures which are connected in series, wherein the single-stage annular fiber delay line cache structures have the same cache unit number, the cache granularities of the single-stage annular fiber delay line cache structures are in geometric progression (the common ratio is a reciprocal of the sum of 1 and the number of the cache units contained in the single-stage annular fiber delay line cache structures), and the allocation and scheduling algorithms of the cache units of each single-stage annular fiber delay line cache structure are the same. The multistage annular fiber delay line cache structure can realize fine cache granularity and overlong time cache at the same time; and the operations between the single-stage cache structures are mutually independent, and can perform the allocation and scheduling of the cache units inparallel, so that the cache structure reduces the scale and complexity of control, reduces the difficulty of control program design, and makes the upgrade and the expansion simple and convenient.

Description

technical field [0001] The invention relates to a caching technology of optical signals in optical packet switching, which utilizes a multi-stage annular optical fiber delay line buffer structure to realize optical packet access and solves the problem of low utilization efficiency of optical fiber delay lines in optical packet switching nodes at present, and belongs to The field of optical communication technology. Background technique [0002] Optical fiber communication has gradually become the main mode of modern communication transmission, especially trunk line transmission, and is developing towards the direction of all-optical network. The core technology of the all-optical network mainly includes two parts, one is optical transmission, and the other is optical switching. Ultra-high-speed transmission and ultra-large-capacity dense wavelength division multiplexing technology have greatly improved the transmission capacity of optical links, and optical switching techno...

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Application Information

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IPC IPC(8): G02B6/28
Inventor 赵芳芳
Owner 赵芳芳