Ethernet and ATM tier joined data vonversion and correction device and method

A verification device, Ethernet technology, applied in data exchange network, data exchange through path configuration, data representation error detection/correction, etc., can solve problems such as low processing efficiency, inability to work in parallel, and reduce workload , the effect of reducing system cost and saving logic resources

Inactive Publication Date: 2004-09-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two transmission directions from ATM layer to Ethernet and from Ethernet to ATM layer cannot work in parallel. Only one processing module can work, and the processing efficiency is not high.

Method used

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  • Ethernet and ATM tier joined data vonversion and correction device and method
  • Ethernet and ATM tier joined data vonversion and correction device and method
  • Ethernet and ATM tier joined data vonversion and correction device and method

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Embodiment Construction

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] as attached figure 1 As shown, the structure of an embodiment of the present invention includes the following parts:

[0037] 102 Ethernet sending modules, mainly report port preparation information according to the query requirements of the network processor, and detect the data packets of the bus in real time, trigger the sending state machine (a part of the sending module) with the start flag of the data packets, and send the data of the bus It is cached into the corresponding storage FIFO according to the width of 32 bits, and the start and end flag bits of the data packet are cached at the same time.

[0038] 103 Send CRC generation module, detect that the data packet has been buffered in the FIFO on the Ethernet sending side, and at the same time, the sending FIFO on the ATM side is not full, start the CRC generation state machine, and read the ...

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PUM

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Abstract

The devices comprises sending module at same Ethernet from Ethernet to ATM layer, sending module for CRC generation, ATM sending module and ATM receiving module from ATM layer to Ethernet direction, receiving module for CRC checking, Ethernet receiving module as well as sending and receiving storage module at ATM side, and sending and storage module at Ethernet side. The said above devices implement conversion and verification of jointed data between Ethernet and ATM. The invention realizes bus conversion between Ethernet and ATM, and CRC calculation without need of resources of network processor. RAM look-up table is utilized in CRC calculation module so as to save lot of logic resources, and reduce system cost.

Description

technical field [0001] The present invention relates to digital communication technology, more specifically, is a kind of device that is used to realize ATM (Asynchronous Transfer Mode, asynchronous transfer mode) layer to Ethernet docking, and carries out data CRC (cyclic redundancy check) verification and Approach. Background technique [0002] Ethernet is a baseband LAN (Local Area Network) standard invented by Xerox Corporation. It adopts carrier sense multiple access protocol (CSMA / CD) with collision detection, and the transmission medium is coaxial cable. With the rapid development of communication technology, it has been more and more widely used in various fields. Ethernet access adopts an asynchronous working method, which is suitable for handling IP burst data flow. Since its development, there have been important changes and breakthroughs in technology (LAN switching, star wiring, large-capacity MAC address storage and management, etc.). ATM is a standard develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/00H03M13/09H04L12/24H04L12/26H04L12/28
Inventor 杜晓芸
Owner ZTE CORP
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