Method for converting packet mode data from high-bit width format to low-bit width format using frame alignment

Abstract

The invention discloses a method for realizing the format conversion of the package mode data from the higher bit wide to the lower bit wide using the frame positioning, characterized by that the method comprises, (1) conducting super-long package detection for the input package, processing the packages exceeding the preset package length into the standard package, (2) adding the package length information of the status signal of the input packages to transform them into the frame header of the lower bit wide, and storing it in the previous address of the data package header, (3) by performing frame header positioning to the lower bit wide data, recovering them into the higher bit wide data having the status information. The invention has the advantage of saving storage resource, convenient format conversion and having self-curing function.

Description

field of invention

[0001] The present invention belongs to a format conversion method based on packet mode data. The so-called packet mode data includes Ethernet, asynchronous transfer mode (ATM), high-order data link control procedure (HDLC), link access procedure (LAPS), general Frame format processing (GFP) and other data that use packets as the basic unit of transmission. The format conversion method involves processing of super long packets, abnormal packets, filtering of special packets, and the use of frame positioning to realize packet-based high-bit-width data to Method for low-bit-width data conversion. technical background

[0002] Packet data can usually be processed into status bits + data bits. After adding status bits, the data bit width changes, which is often not conducive to direct storage. Therefore, it is necessary to convert high-bit-width data into low-bit-width data to facilitate data storage.

[0003] Taking the processing of Ethernet packet data as...

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