Changlai Du

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The goal of a video conferencing system is to deliver multimedia data to the conference participants efficiently and securely. To meet the requirement of a video conferencing system over the internet, many issues have to be addressed, such as security, scalability and heterogeneity. In this paper, we propose a secure and scalable video conferencing system(More)
In this paper, we present MobTrack, a single device system which aims to locate interfering radios on unlicensed ISM band in indoor environments. Compared with existing techniques which require a deployment of dense access points (APs), MobTrack only demands a single device equipped with multiple antennas. The location of an interfering signal source are(More)
Peer-to-Peer is one of the most popular live streaming delivery technologies owing to its scalability and low-cost. Most practical P2P streaming systems adopt hundreds of channels to deliver streaming to thousands of users simultaneously, and thus there is a great challenge to allocate server resources among these channels efficiently. In practice, most P2P(More)
With the rapid growth of the scale, complexity and heterogeneity of Peer-to-Peer (P2P) systems, the handle of the peer’s network-oblivious traffic and self-organization has become a great challenge. A potential solution is to deploy servers at different locations as appropriate. However, due to the unique features and requirements of P2P systems,(More)
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