System and method for eliminating long line transmission time delay of source synchronizing signal

A technology of synchronous signals and transmission delay, applied in the field of communication, can solve the problems of complex algorithm processing burden and high hardware requirements, and achieve the effect of overcoming too harsh hardware requirements, simplifying complexity, and avoiding signal errors

Active Publication Date: 2008-03-05
ZTE CORP
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Problems solved by technology

[0025] The technical problem to be solved by the present invention is to provide a system and method for eliminating long-line transmission delays of source synchronous signals, which can effectively solve the problem of long-line transmission delays with easy-to-implement hardware methods and simple processing methods, thereby overcoming the current There are defects in the technology that require too much hardware, complex algorithms, and heavy processing burdens

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  • System and method for eliminating long line transmission time delay of source synchronizing signal
  • System and method for eliminating long line transmission time delay of source synchronizing signal
  • System and method for eliminating long line transmission time delay of source synchronizing signal

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Embodiment Construction

[0056] The system for eliminating long-line transmission delay of source synchronous signals provided by the invention includes a master device and a slave device connected through a long transmission line. When the slave device receives the data sent by the master device, it forwards the synchronous signal SYNC received at the same time to the master device, and the master device returns the forwarded SYNC signal to the slave device, and the slave device uses the received clock signal CLK to receive the SYNC The transmission delay between the signal and the SYNC signal returned by the master device is counted to calculate the transmission delay value (2*T1), and the time advance of the data sent from the slave device to the master device is adjusted according to the 2*T1 value. The master device can correctly receive the data sent by the slave device according to the CLK and SYNC signals. The above solution is realized by adding a synchronization signal return unit in the mas...

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Abstract

Being related to master/slave devices, the method includes steps: (1) master device sends clock signal, synch signal, and data to slave device; (2) when receiving data, the slave device transmits the synch signal received at same time to the master device; after receiving the transmitted synch signal from the slave device, the master device returns the synch signal back to the slave device; (3) using the received clock signal, the slave device counts value of transmission delay (VTD) between the received synch signal and the returned synch signal; (4) using the received synch signal as reference and based on VTD, the slave device adjusts preact of time for sending data to the master device; (5) based on clock signal and synch signal, the master device extracts the received data. The invention prevents signal error from transmission delay of synch signal caused by long transmission line as well as overcomes too high demand on hardware and processing capabilities.

Description

technical field [0001] The invention relates to the fields of communication and computer, in particular to a system and a method for synchronous signal transmission delay compensation. Background technique [0002] In order to ensure its real-time performance, the communication network usually adopts the method of synchronous transmission for network communication. The synchronous transmission method mentioned here has the following characteristics: [0003] (1) The transmission physical layer line can use single-ended line, coaxial cable, twisted pair transmission; [0004] (2) Signal line group required for signal transmission: [0005] CLK: data sampling clock; [0006] SYNC: data synchronization signal; [0007] RXD: receive data; [0008] TXD: send data. [0009] (3) Transmission method: [0010] When the sending data is effectively triggered by the synchronous signal SYNC (there are two ways: usually high, valid is low; or usually low, valid is high), start to s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L7/00H04L29/06
Inventor 徐高峰
Owner ZTE CORP
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