OTL (Optical Transport Lane) protocol multichannel data align realization method based on FPGA

A data alignment and realization method technology, applied in the fields of digital communication, optical fiber communication, and optical fiber data acquisition, can solve the problems of channel data not arriving at the same time, channel data lag, time deviation, etc., to simplify the layout complexity and reduce production Effects of cost and quantity reduction

Inactive Publication Date: 2019-02-01
TOEC TECH
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Problems solved by technology

Due to the long-distance transmission of optical fiber and the error of the receiving equipment, the data of each channel is prone to time deviation at the receiving end, and the data of each channel cannot arrive at the same time. The data of some channels is relatively ahead, and the data of some channels is relatively lagging behind. Aligning each channel is the difficulty of correctly receiving the OTL protocol

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  • OTL (Optical Transport Lane) protocol multichannel data align realization method based on FPGA
  • OTL (Optical Transport Lane) protocol multichannel data align realization method based on FPGA
  • OTL (Optical Transport Lane) protocol multichannel data align realization method based on FPGA

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Based on FPGA receiving multiple channels of parallel data, it means that FPGA receives multi-channel data, and each channel transmits 1 data in 1 clock cycle. For N (N ≥ 2) channels, FPGA connects to N in 1 clock cycle. This is the meaning of multi-channel parallel data.

[0028] OTL3.4 protocol frame structure such as figure 1 As shown, the amount of information in one frame is 16320Byte, and each grid represents 16Byte-wide information. For example, the 1:16 of the grid where the framehead logo is located indicates the 1st to 16th Byte data, and 1Byte is 8bit. The OTL3.4 protocol includes 4 channels to figure 1 The regular arrangement of each frame has 255 columns.

[0029] The frame structure of OTL4.4 and OTL4.10 protocol is as follows figure 2 As shown, the information volume of one frame is the same as that of the OTL3.4 protocol frame, which is 1632...

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Abstract

The invention discloses an OTL (Optical Transport Lane) protocol multichannel data align realization method based on an FPGA. The method comprises the following steps of 1, inputting data of each channel into respective fifo (First Input First Output) module for buffering and reading; 2, inputting the data of each channel output by the fifo into respective head marker module for frame head searching operation, and outputting head_flag signals; 3, receiving and processing the head_flag signals by an align module, and outputting rd signals to carry out reading control over each fifo module; and4, carrying out judgment by the align module through utilization of the input head_flag signals, and outputting an align identification signal align_ok, wherein signal pull-up indicates that align isfinished, and signal pull-down indicates that the align is not finished. According to the method, an OTL protocol multichannel data align function is realized in the FPGA, and the method has wide application value in the fields such as optical fiber communication, optical fiber data collection and digital communication.

Description

technical field [0001] The invention relates to the fields of optical fiber communication, optical fiber data acquisition, digital communication and the like, in particular to a method for realizing multi-channel data alignment of an FPGA-based OTL protocol. Background technique [0002] With the development of communication technology, the demand for high-speed transmission of large amounts of data is getting higher and higher. The limited transmission bandwidth of the traditional single channel cannot meet the actual needs, and multi-channel parallel transmission has become a widely used solution. [0003] In the optical fiber backbone network, it mainly carries OTN signals that support multi-channel transmission. The interface protocol of OTN signals is OTL (Optical Transport Lane), which means optical transmission line protocols, including OTL3.4, OTL4.4, OTL4.10, etc. protocol. Due to the long-distance transmission of optical fiber and the error of the receiving equipm...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J3/06H04J3/16H04L12/861H04L12/863
CPCH04J3/0685H04J3/1652H04L47/6245H04L49/90
Inventor 安涛李斌李晨旭
Owner TOEC TECH
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