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Annular feedback, sharing and caching device based on network coding and FDL and control method of device

A technology of network coding and shared cache, applied in the structural field of optical packet switching competition solution, can solve problems such as packet header blocking, achieve the effect of improving the success probability of cache and solving optical packet competition

Active Publication Date: 2014-08-13
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The biggest problem is the header blocking problem

Method used

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  • Annular feedback, sharing and caching device based on network coding and FDL and control method of device
  • Annular feedback, sharing and caching device based on network coding and FDL and control method of device
  • Annular feedback, sharing and caching device based on network coding and FDL and control method of device

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Experimental program
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Embodiment Construction

[0024] The node structure of the present invention will be described in depth below in conjunction with the accompanying drawings.

[0025] figure 1 Shown is a schematic diagram of the network coding and FDL loop feedback shared cache node structure used for contention resolution in OPS, including the control module, OPS switching matrix, network coding module and FDL loop feedback shared cache module. (The FDL circular feedback shared cache module in the figure is illustrated by cascading 4 sub-switch matrices and 4 FDL cache groups, or multiple sub-switch matrices and FDL cache groups can be cascaded to form a ring), the network coding extension in the OPS switch matrix The output port is connected to the optical splitter of the network coding module, and the OPS switch matrix ring feedback shared cache expansion output port is connected to the expansion input port of the sub switch matrix, and the expansion output port of the sub switch matrix is ​​connected to the ring fee...

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Abstract

The invention discloses an annular feedback, sharing and caching device based on network coding and an FDL and a control method of the device, and relates to the technical field of optical communication. Multiple competitive groups have access to a network coding module for network coding through network coding extension output ports in an OPS switching matrix, and time delay can not be introduced. When the network coding module can not completely solve competition, competitive optical packets have access to an extension input port of a switching submatrix through an annular feedback sharing and caching extension port of the OPS switching matrix, and the most proper cache is selected in a minimum cache length cascading control method. The most proper cache is output by means of the switching submatrix, the OPS switching matrix extension input port is switched to an OPS matrix basic output port through the OPS switching matrix, and the cache is output to an optical fiber line. The device has remarkable effects in reducing the packet loss rate, reducing the time delay, increasing caching capacity and improving the utilization rate of the fiber delay line, and can well solve the problem of optical packet competition.

Description

technical field [0001] The invention relates to the field of optical fiber communication, in particular to a structure applied to optical packet switching contention resolution and a corresponding control method. technical background [0002] Optical packet switching (OPS: Optical packet switching) is considered to be an inevitable trend of future all-optical switching due to its advantages of small granularity, fast switching rate, low overhead and high bandwidth utilization. When multiple packets of the same wavelength need to be output from the same port of an intermediate node at the same time, wavelength competition between packets will occur. In the OPS network, the data-centered optical packet collision probability is relatively high, how to solve the optical packet contention is a crucial issue to ensure network performance. In the current situation of immature optical domain RAM (Random access memory), there are three main competing solutions: fiber delay line (FDL...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04J14/02H04L12/933H04L12/861
Inventor 刘焕淋胡婷周邦陶沈钦仁李瑞艳陈勇黄胜
Owner CHONGQING UNIV OF POSTS & TELECOMM
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