My general research area is computer networking, and above all topics he is most interested in improving users' network experiences and perceptions of network quality. Computer networks are ubiquitous, and the concept of "anytime-anywhere" communication is rapidly becoming a reality for millions of people. However, people must still invest time and effort learning about and adapting to this relatively new phenomenon of networking. My goal is to make it a seamless part of everyday life.
Therefore, I focus on developing new Internet services and making the medium more user-friendly. My current research interests span the following areas:
1) Internet Quality of Experience Management: I hope that network systems will become smarter and more responsive to people's needs. For example, if people find the network quality is unacceptable when attending a video conference or playing an online game, the systems will "perceive" this situation and know how to adjust the parameters and re-balance the network resources to mitigate the problem. Designing such smart systems is challenging. Thus, I am investigating how to estimate and quantify human perceptions and reactions, and then use these measures in the design of computer systems.
2) Network Security: I hope that, in the not too distant future, Internet surfing will be safe and users' privacy be secured, where users need not constantly upgrade antivirus tools to block computer viruses and Trojan horses, or worry about computer frauds. This is why I chose to do research on detecting and preventing malicious/fraudulent activities. I envisage a time when users' network experiences will not be disturbed by threats to privacy and acts of piracy, such as, the deletion of documents by malicious software, the theft of credit card details and online game accounts, and the unauthorized publication of sensitive information, e.g., the records visiting dating websites. Thus, how to detect and prevent malicious/fraudulent activities on the Internet is also one of my research areas.
3) Online Gaming: Although online gaming has become one of the major Internet activities, when playing online games, users are often bugged by serious network lags; or they must tolerate seeing the characters of cheaters wearing sparkling magical armor fighting mighty dragons while their own characters can only wear secondhand scale armor and defeat wild dogs; or they may experience in being shot by bot-controlled characters with an all-the-time perfect accuracy while playing first-person shooting games. Moreover, some players may find that their characters' valuable virtual goods have been ripped off by crackers when they log into a game. I have teamed up with online game companies in order to solve these problems related to performance, fairness, and security from the aspect of game design mechanisms and human behavior.