基于电子白板的远程实时答疑系统

Remote real-time answering system based on electronic whiteboard

为解决现场答疑受时间和地点限制的问题,分析了现有答疑系统的不足,构建了一种以答疑双方为对等客户端的远程实时答疑系统。将TCP协议和UDP协议相结合,采用双协议三线程方法,实现了客户端动态IP地址的自动获取及通讯连接。引入电子白板技术,实现文本与图形模式的同步交流,体现了传统板书讲解特点。提出教师答疑评价方法,为教师和教学管理部门提供考核依据。在Internet中测试的结果表明,该系统能够提供远程在线答疑,具有较好的方便性和实用性。

To solve answering face to face restricted by time and place, shortcomings of current answering system are analyzed, and aremote real-time answering system for peer-to-peer clients is constructed. To automatically extract dynamic IP address and realize communication connection for clients, TCP is combined with UDP, and dual-protocol and triple-thread method are also employed. Electronic whiteboard technology is introduced to carry out synchronous communication based on text mode and graphic mode and embody characteristic by writing on blackboard. Answering evaluation method to teacher is proposed to provide grading criteria for teacher and teaching administrative department. Internet based running showed that the proposed system can meet the needs of remote on-line answering, with strong convenience and nracticality