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ODU2 data sequence rearrangement circuit

A data sequence and rearrangement technology, applied in data exchange networks, electrical components, digital transmission systems, etc., can solve problems such as exchange problems restricting development, and achieve the effects of ingenious design, simple circuit structure, and high adaptability

Inactive Publication Date: 2014-06-04
XIAN UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although OTN has many advantages, the switching problem is still a bottleneck restricting its development

Method used

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  • ODU2 data sequence rearrangement circuit
  • ODU2 data sequence rearrangement circuit
  • ODU2 data sequence rearrangement circuit

Examples

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Embodiment Construction

[0011] The present invention will be described in detail below in conjunction with the accompanying drawings and implementation examples.

[0012] The ODU2 data sequence rearrangement circuit of the present invention can automatically calculate the output sequence flag values ​​of the remaining 7 bytes of data according to the flag value (flag_reg[2:0]) indicating the first byte of the output data, and these flag values ​​are respectively Act on the selection control end of the respective selectors to complete the sequence rearrangement and output of 8 bytes of input data. This design structure improves the adaptability and work efficiency of the circuit.

[0013] figure 1 It is a circuit diagram of the present invention, a kind of ODU2 data sequence rearrangement circuit structure of the present invention, is made up of 7 3-bit adders and 8 8 choose 1 data selectors. The input 8-byte data that needs to be rearranged in sequence is connected to the data input terminals of th...

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Abstract

Disclosed is an ODU2 data sequence rearrangement circuit which is mainly applicable to a data sequence rearrangement function in a process in which an ODU2 frame is segmented into data packets and belongs to the technical field of design of an integrated circuit specially used for communication and aims at using a simple method and a small number of hardware circuits to complete the design of the data sequence rearrangement circuit. The circuit includes 7 parallel three-bit adders and 8 parallel 8-to-1 data selectors. Input 8 bit data are data 7 [7:0]-data 0 [7:0] sequentially from high byte to low byte and are all connected with data input ends of the 8 data selectors. Output values of the 7 parallel adders are connected to selection ends of selector 1 to selector 7. The ODU2 data sequence rearrangement circuit rearranges automatically the 8 type data in a sequence of using the byte as a unit according to a requested output sequence and then outputs the data. The circuit is clear in structure, higher in performance and reliable in work.

Description

technical field [0001] The invention relates to an OTN-based data packet switching technology, in particular to an ODU2 frame data sequence rearrangement circuit structure, and belongs to the technical field of communication application-specific integrated circuit design. Background technique [0002] Optical Transport Network OTN (Optical Transport Network) can meet the needs of large-grained services, can carry client signals at GbE / 10GbE / 40GbE / 100GbE rates, and can transparently transmit various client signals such as SDH / SONET, IP / MPLS, ATM, Ethernet Wait. OTN not only overcomes the shortcomings of SDH and WDM but also has the advantages of both. It will be the mainstream transmission mode of the future business network. Although OTN has many advantages, the exchange problem is still a bottleneck restricting its development. OTN technology is essentially TDM (time-division multiplexing) technology. Circuit switching is usually used to realize TDM switching. However, ci...

Claims

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Application Information

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IPC IPC(8): H04L12/931H04L12/951H04L47/43
Inventor 蒋林朱谦孟李林蔡龙李巧红
Owner XIAN UNIV OF POSTS & TELECOMM
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