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Data communication system and method for distributed system

A technology of data communication system and distributed system, applied in the direction of transmission system, data exchange details, long-distance connection/disconnection of branches, etc., can solve problems such as lack of operability, small communication volume, and complex network communication of the system. Achieve simple and reliable network communication

Active Publication Date: 2009-09-02
SHANGHAI MICRO ELECTRONICS EQUIP (GRP) CO LTD
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  • Application Information

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Problems solved by technology

[0005] However, using the above-mentioned communication mechanism, users must have knowledge of socket communication as a basis to achieve cross-platform communication; moreover, this method is suitable for networks with small communication volumes, and for complex multi-task systems, it will be difficult because the system network communication is too large. complex, lack of operability

Method used

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  • Data communication system and method for distributed system
  • Data communication system and method for distributed system
  • Data communication system and method for distributed system

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Embodiment Construction

[0017] The present invention relates to a data communication system and method for distributed systems. The present invention is aimed at the problem that cross-platform multi-task data communication needs to solve, adopts following technical scheme to carry out concrete realization: when Server receives the request message of Client end, serv_addr represents the address of Server, len is used for representing the maximum request message length that is allowed to receive, timeout Indicates the timeout time for waiting to receive the request; msg indicates the message buffer pointer stored in the received request message, which is used to store the received request message; act_len indicates the actual length of the received message, and repl_addr indicates the address pointer stored in the return address; Server has no message At that time, it will be blocked until a message arrives or times out; when several clients send request messages to the server at the same time, polling...

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Abstract

The invention discloses a data communication system and method for a distributed system. The specific implementation of CNI (communication network interface) underlying communication adopts the standard TCP / IP protocol socket (socket) interface for data communication, which is divided into external Interface unit, Server processing unit, Client processing unit, Select processing unit, positioning function unit, FD operation unit, transmission mechanism unit, specific tool unit, error processing unit, memory management unit, etc., provide a unified interface mode to the outside world, thus shielding Low-level communication details. The invention shields the communication details of the bottom layer, so that the user can directly realize cross-platform data communication by invoking the provided external interface without knowledge of socket communication.

Description

Technical field [0001] The invention relates to the field of digital information transmission, in particular to a data communication system and method for distributed systems. Background technique [0002] A distributed system is a complex system, and usually its different subsystems run different operating systems. Taking the lithography machine system as an example, the main control system is SUN's SPARC workstation, and the running operating system is Solaris; some other subsystems run on PowerPC, and the operating system is the real-time operating system VxWorks, and some subsystems run on industrial use. On the industrial computer, the operating system is Windows; in addition, there are some PC-based debugging platforms that also run the Windows operating system, and these computer systems are connected together through industrial Ethernet. [0003] Please refer to figure 1 , figure 1 It is a schematic diagram of the network connection of the lithography machine syst...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/10H04L12/12
Inventor 周金明陈勇辉
Owner SHANGHAI MICRO ELECTRONICS EQUIP (GRP) CO LTD