英语测试系统中基于WebSocket的实时通信系统的研究与设计

发布时间：2018-03-16 02:16

本文选题：在线考试　切入点：考试通信　出处：《中国科学技术大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着Web开发技术的发展与成熟,网络在线考试得到了越来越广泛的应用。由于考试功能在网络考试系统中占据重要的地位,目前的网络在线考试系统中均过于重视考试功能的实现,忽视了考试过程中监考端与考试端机器的信息通信环节。而在通用型英语测试系统中需要通过实时通信技术来监控考场来保证在线考试的安全性和稳定性,所以研究并设计一个可靠的考试通信系统具有十分重要的意义。目前Web实时通信的解决技术方案主要分为两类:一是浏览器插件技术;二是基于HTTP长连接的技术,但这些解决方案在实际应用中都存在着不足之处,如资源浪费、实现复杂、实时性不高等。因此,研究并分析现有的Web实时通信技术,设计并实现一个适用于通用型英语测试系统中的考试通信的解决方案是本文的主要目的。本文通过对目前几种使用较为广泛的实时通信解决方案进行调研后,对HTML5标准中WebSocket通信协议进行了详尽的探究,并设计了一种基于WebSocket协议的实时应用解决方案,此方案在一定情况下可以弥补当前实时通信方案中的缺点与不足。在此基础上,作者结合通用型英语测试系统的实际需求,研究并实现了通用型英语测试系统中基于WebSocket协议的实时通信系统。首先,根据系统的实际需求,本文设计了通用型英语测试系统中通信子系统的总体架构并完成了通信系统中WebSocket服务器的设计。其次,完成了通信系统中连接处理模块、通信信息读取模块、数据发送模块、考试业务处理模块、Session控制管理等功能的实现。最后,根据考试业务的实际需求,对考试过程中进入考试、开始考试、中止考试等功能进行了实现。然后为了保障系统各个功能模块的正常使用,本文针对设计实现的系统进行了系统测试。同时,为了验证本文设计的通信方案的实际性能,使用WebSocket协议和Ajax长轮询两种技术方案实现一个业务功能相同的应用,对两者的平均响应时间、网络带宽消耗的数据进行记录,通过实验结果对比分析WebSocket通信方案的优越性。本文完成了通用型英语测试系统中的考试通信系统的研究与设计及核心功能模块的实现。基于WebSocket协议的考试通信系统有效改善了考试通信过程中的信息实时性能,并且在通用型英语测试系统中面对多考生人数及高密集信息通信具有良好的效果。目前,本系统已经进行初步试点,并在以后的几所高校实际使用逐步完善。
[Abstract]:With the development and maturity of Web technology, online examination has been more and more widely used. In the current online examination system, too much attention has been paid to the realization of the function of the examination. It ignores the information communication link between the invigilator and the machine in the examination process, but in the general English testing system, the real-time communication technology is needed to monitor the examination room to ensure the safety and stability of the online test. So it is very important to study and design a reliable test communication system. At present, the solution of Web real-time communication is divided into two categories: one is browser plug-in technology, the other is based on HTTP long connection technology. However, these solutions have some shortcomings in practical applications, such as waste of resources, complexity of implementation, low real-time performance, etc. Therefore, the existing Web real-time communication technology is studied and analyzed. It is the main purpose of this paper to design and implement a solution to test communication in general English testing system. In this paper, the WebSocket communication protocol in HTML5 standard is discussed in detail, and a real-time application solution based on WebSocket protocol is designed, which can make up for the shortcomings and shortcomings of the current real-time communication scheme under certain circumstances. The author studies and implements the real-time communication system based on WebSocket protocol in the general English testing system according to the actual requirements of the general English testing system. First, according to the actual requirements of the system, the author studies and implements the real-time communication system based on the WebSocket protocol in the general English testing system. In this paper, the overall architecture of communication subsystem in general English testing system is designed and the design of WebSocket server in communication system is completed. Secondly, the connection processing module, the communication information reading module, the data sending module in the communication system are completed. Finally, according to the actual requirements of the examination business, to enter the examination process, start the examination, Then in order to ensure the normal use of each functional module of the system, this paper carries out system testing for the system designed and implemented. At the same time, in order to verify the actual performance of the communication scheme designed in this paper, WebSocket protocol and Ajax long polling are used to realize an application with the same service function. The average response time and network bandwidth consumption data are recorded. In this paper, the research and design of test communication system in general English testing system and the implementation of the core function module are completed. The Test Communication Department based on WebSocket Protocol. The system effectively improves the real-time performance of information in the course of examination communication. And in the general English test system, it has good effect to face the number of multi-examinees and the high density of information communication. At present, the system has been pilot, and the practical use in several colleges and universities in the future has been gradually improved.
【学位授予单位】：中国科学技术大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP311.52;TP393.09

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