LXI设备多用户访问控制与数据共享方法

Muti-user access controlling and data-sharing for LXI devices

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。

The characteristics and service conditions of LAN eXtensions for Instrumentation（LXI） areanalyzed. Two problems including multi-user control conflicts and data-sharing are pointed out. Somesolution are adopted as follows： binding the event notification to overlapped I/O to increase the bearingcapacity of the server, then using VXI-11 protocol to realize the mutually exclusive access control andusing User Datagram Protocol（UDP） of Silverlight to transfer network stress to the remote nodes. Throughtests in different environments, it indicates that the method proposed in this paper can effectively increasethe ability of the network loading, as well as the information synchronization and the security.