利用任播技术提高远程教育系统的服务质量

Using Anycast to Improve the Distance Education System's QoS

远程教育是利用现代高科技手段,建立在现有通信网络基础上的一种全新的教学模式。自主学习系统是远程教育系统中的一个重要组成部分,学生主机利用单播地址建立和课件服务器的连接,然后数据传输,进行自主学习。但存在接入成本高,服务质量难以保证等缺点。利用任播技术组建自主学习系统,使学生主机连接到“最近”的课件服务器,降低接入成本,有效利用资源,提高远程教育的服务质量。

Distance education is a new teaching mode with a mean of modern science and technology and based the exiting communications network. Self-learning system is one of the most important parts, the host sets up the connection with the servers using unicast address, the package is transferred, then self-learning. But there are disadvantages of expensive cost of access and no ensured service.Using anycast, the self-learning system makes the host connect the 'nearest' server, which reduce the cost of access and use the resource effectively, then improve the distance education's QoS.