Development and Implementation of C2C-Based Instant Messaging System

• Main Authors: Ning-Yun Ku, 古甯允
• Other Authors: Cheng-Yu Yeh
• Format: Others
• Language: en_US
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/66tg99

博士 === 國立臺北科技大學 === 電機工程系所 === 105 === Instant messaging (IM) is a real-time communication system. It allows users to send a variety of messages, such as text, file, audio, image, and video, through the internet. The IM system has been widely used in mobile devices as a communication tool in our life. Recently, a strong demand for customized software development of the IM system has appeared in many enterprises for security purpose. A communication protocol, named extensible messaging and presence protocol (XMPP), is the most commonly used protocol in IM systems. However, the performance of such IM systems can be further improved in terms of user capacity. This issue is also our research topic in the dissertation. This dissertation presents an IM system with a client-to-client (C2C) communication protocol, named the C2C-IM system. The C2C protocol is adopted to efficiently handle a large number of users and messages in an IM system. Thus, the C2C protocol has three advantages, including fast serialization and deserialization processes, high-speed signaling parser, and high-capacity server processing. Furthermore, general services and functions of an IM system are provided in our system. Finally, experimental results confirm that the user capacity in the proposed C2C-IM system is increased by 4 times in comparison with an open source Openfire system using the XMPP protocol. The performance superiority of the proposed C2C-IM system is validated. It is worth mentioning that the cost of building a C2C-IM system would represent a significant reduction from that of an Openfire XMPP system.