Ethernet-based high-speed seismic data transmission and control system

A technology of seismic data and Ethernet, applied in digital transmission system, transmission system, data exchange network, etc., can solve the problems of transmission capacity decline, transmission error, transmission instability, etc., and achieve the effect of improving efficiency and reducing the number of interrupt responses

Active Publication Date: 2010-10-13
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Application Information

AI Technical Summary

Problems solved by technology

However, large-scale seismic acquisition systems are used in the field, and are susceptible to the interference of various environmental factors in the natural world, resulting in a decrease in transmission capacity. In case of errors or failed transfers

Method used

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  • Ethernet-based high-speed seismic data transmission and control system
  • Ethernet-based high-speed seismic data transmission and control system
  • Ethernet-based high-speed seismic data transmission and control system

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Embodiment Construction

[0025] The data transmission mentioned in this design means that the seismic acquisition data is transmitted to the host system 3 for recording and storage in the cross station 2 through the cross line 1 using the invented high-speed seismic data transmission reliability control technology based on Ethernet.

[0026] In this large-scale seismic acquisition system, the central processing unit of the cross station selects the MPC8270 processor in the FreeScalePowerQUICC II series embedded communication processor family, and the operating system selects the VxWorks real-time embedded operating system. The MPC8270 processor is a dual-core CPU, and its processing of communication data is completed by one of the processing cores, most of which are directly operated by hardware, and the efficiency is very high; while the upper-level tasks run on another core, so This processor has strong computing power and communication ability at the same time. The choice of the operating system is...

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Abstract

The invention relates to an Ethernet-based high-speed seismic data transmission and control system. The system comprises a frame length threshold unit, a flow control unit, a retransmission rate threshold control unit and a drive frame-receiving unit, wherein the frame length threshold unit is used to regulate the length threshold of Ethernet frame transmitted in intersecting line; the flow control unit is used to dynamically adjust the balance among transmission stability, transmission efficiency and transmission delay on the basis of a timer; the retransmission rate threshold control unit contains a controllable automatic retransmission mechanism and a configurable retransmission rate threshold; when the retransmission rate exceeds the threshold value, the upper host and operating personnel decide the subsequent operation; and the drive frame-receiving unit is used to establish an Ethernet link layer zero-copy fast-forwarding mechanism, and drive the mechanism to receive the entire frame and read the data required to read from the frame and send the read data to upper application task; and the system of the invention is suitable for the transmission of the large-scale seismic data acquisition system, and can ensure the transmission rate of data, avoid the packet loss phenomenon in data transmission to the maximum and ensure the transmission quality of field data acquisition under appropriate and stable transport protocol.

Description

technical field [0001] The invention relates to a data transmission control system of a large-scale seismic instrument used to ensure the stability of field seismic acquisition data transmission. Background technique [0002] Ethernet refers to the baseband LAN specification created by Xerox Corporation and jointly developed by Xerox, Intel, and DEC Corporation. Ethernet networks use CSMA / CD (Carrier Sense Multiple Access with Collision Detection) technology and run over multiple types of cables at multiple selectable rates. Ethernet is similar to IEEE802·3 series standards. It is not a specific network, but a technical specification. [0003] In order to adapt to the continuous improvement of seismic exploration methods, seismic instruments continue to expand the real-time channel capability of the system, which makes it possible to collect Figure 1 There are more and more data in unit 2) in the system, and several cross stations in the system need to pass the data throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L12/56H04L12/24H04L12/70
Inventor 戴志涛易碧金邝坚姜耕李艳军罗兰兵李兴华贾艳芳颜良
Owner BC P INC CHINA NAT PETROLEUM CORP
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