LXI设备多用户访问控制与数据共享方法

摘要

The characteristics and service conditions of LAN eXtensions for Instrumentation(LXI) are analyzed. Two problems including multi-user control conflicts and data-sharing are pointed out. Some solution are adopted as follows: binding the event notification to overlapped I/O to increase the bearing capacity of the server, then using VXI-11 protocol to realize the mutually exclusive access control and using User Datagram Protocol(UDP) of Silverlight to transfer network stress to the remote nodes. Through tests in different environments, it indicates that the method proposed in this paper can effectively increase the ability of the network loading, as well as the information synchronization and the security.%在分析现有局域网扩展仪器(LXI)设备的特点和实际使用情况的基础上，指出存在多用户访问控制冲突和数据共享的问题。通过采用重叠 IO加事件通知的方法来增加服务器端的承载能力，并利用 VXI-11协议实现互斥访问控制。利用 Silverlight支持用户数据包协议(UDP)的特点，将网络负载压力转移到程控端，实现数据共享。在不同测试环境中进行的测试结果显示，本文采用的方法能有效增加 LXI设备的网络负载，提高信息同步的能力以及设备安全性。