嵌入式习字教室系统

计算机工程与应用 ›› 2015, Vol. 51 ›› Issue (13): 77-80.

嵌入式习字教室系统

彭喻杰，戴　　永

湘潭大学智能计算与信息处理教育部重点实验室，湖南　湘潭 411105

出版日期:2015-07-01 发布日期:2015-06-30

Embedded classroom-system for writing on learning

PENG Yujie, DAI Yong

College of Information Engineering, Xiangtan University, Xiangtan, Hunan 411105, China

Online:2015-07-01 Published:2015-06-30

摘要/Abstract

摘要： 针对嵌入式平台局域网协议、师生可叠写作业原图交互等问题，根据局域网内部嵌入式设备实时通信链路状态相对较好，硬件资源要求不高等特征，设计嵌入式习字教室系统。嵌入式局域网协议（ELP）在以太网帧上扩展8字节字段的包头；使用本地和远程的端口号和MAC地址来标识一个连接；使用窗口和速率相结合的流控机制，提供面向连接的可靠传输服务；参考uip优化状态机制、重传队列机制、确认机制和拥塞控制算法。实验结果表明，该教室系统内文件传输速度方面相比嵌入式TCP/IP有较大提高，有效实现了实时性原图作业交互。

关键词: 习字, 嵌入式局域网协议, 教室系统, 学生端, 教师端, 作业交互

Abstract: This paper aims at designing a LAN protocol based on embedded platform on which teachers and students can write overlapping original interaction of writing exercises, considering the state of communication channel in local area network and constraints on computation. This method is comprised by the following techniques: 8 Byte packet header expansion towards ELP（Embedded LAN Protocol）, linkage identification based on local-remote port number and MAC address, traffic control based on the integration of windowing and flow, reference optimization of state mechanism, retransmission queue mechanism, ACK mechanism and congestion control algorithm of uip et al. Experimental results show that the file transfer rate of the classroom-system is higher than embedded TCP/IP and has good effect on interaction of writing exercises.

Key words: writing on learning, Embedded LAN Protocol（ELP）, classroom-system, students&rsquo, terminal, teachers&rsquo, terminal, writing exercises send to each other

彭喻杰，戴　　永. 嵌入式习字教室系统[J]. 计算机工程与应用, 2015, 51(13): 77-80.

PENG Yujie, DAI Yong. Embedded classroom-system for writing on learning[J]. Computer Engineering and Applications, 2015, 51(13): 77-80.