Foreign Language Education Utilizing Wireless Infrared Ray Transmission System

本文介绍了一种基于光散射法的无线局域网和笔记本电脑的外语教学系统的研究，该系统不受地点的限制。首先，采用了IEEE 802. 310 BASE-T标准中的载波侦听多路访问冲突检测（Carrier Sense Multiple Access with Collision Detection，CSMA/CD）技术，它在信号冲突检测方面比CSMA/CA（Carrier Sense Multiple Access with Collision Avoidance，CSMA/CA）具有更大的优势。第二，软件正在运行，这是在一个典型的计算机房使用。它可以双向传递信息，从教师到学习者，反之亦然。此处的信息包括显示和保存文件中的图形信息。在一个典型的计算机房中使用的软件中增加了教师和学习者之间语音的双向数字传输。第三，教师可以在该系统中单独处理一组学习者，实践证明，该系统可以有效和广泛地用于外语教学。该方法适用于阅读、写、听、写四项技能的各个方面，但存在一个小问题，即语音的传输滞后超过1秒。我们中的大多数人都经历过这样的滞后，在一个国际电话和一个电视节目中发现它使沟通有点困难。总之，我们发现了超越诸如LL和计算机室等设施的具体限制的可能性。红外线传输可以位于几乎所有的教室天花板。如果您携带的笔记本电脑与光局域网兼容，那么您可以在其有效区域内自由构建您的指令系统。

Studies of a foreign language instruction system have been carried out by means of wireless LAN with optical diffusion method and note PCs, which do not limit location.Chief characteristics of the system employed in our studies are described in the fllowings. First, CSMA/CD (Carrier Sense Multiple Access with Collision Detection) adopted in IEEE802.3 10BASE-T is employed.It has exceeding advantage of collision detection of signals over CSMA/CA (CSMA with Collision Avoidance). Second, software is in operation, which is used in a typical computer room. It can transmit information bi-directionally from an instructor to learners and vice versa. The information here includes graphical information in display and saved files. Bi-directional digital transmission of speech sounds between an instructor and learners is added to its software used at a typical computer room. Third, an instructor can handle a group of learners individually in this system.It has turned out that the system can be used effectively and extensively in foreign language instructions. It can be applicable to every aspect of four skills, that is, reading, writing, listening and writing.A little problem is found. A transmission lag of speech sounds over one second has been detected. Most of us have already experienced this kind of lag in an overseas call and a TV program to find that it makes communication somewhat difficult.In conclusion, we have found possibilities to go beyond the specific restriction of facilities such as an LL and a computer room. Infrared ray transmission can be located on almost all classroom ceilings. If you bring your note PC compatible with optical LAN, then you can build up your instruction system freely within its effective area.