摘要： In this presentation, the speaker will introduce three recent research results in wireless networks. One is in bandwidth adaptation of wireless networks by using network reversible process property. This research verifies the product-form solution of whole wireless network and further reveals the importance of single-node research in wireless networks. Another research is in call admission control based billing strategies by using the method of Markov decision process. This research verifies the optimal admission threshold policy for new generated data and then provides a novel method in resolving dynamic optimal problems in wireless networks. The third research is on security aspects of wireless sensor networks (WSNs). The speaker will present his recent research works in the protection for securing WSNs against virus attacks through the model development. The research discovers the WSN availability when no anti-virus mechanism is proposed, and then proposes the WSN model with anti-virus mechanism, together with new development of time-based network protection scheme and power-based network protection scheme, respectively. This research derives the explicit solutions of WSN availability for these two adaptive network protection schemes for securing WSNs against virus attacks. As a potential collaboration with scholars who are interested in these areas, the speaker will discuss a few challenging problems in the areas which may need to be paid attention in the near future. Finally, the speaker will present on how the current research be linked to the short range wireless communications for connected vehicle to vehicle (V2V) networks.
報告人簡介：李偉，博士，我校校友，美國休斯頓德克薩斯州南部大學（TSU）計算機科學系教授，NSF復雜網絡研究中心的主任，該中心是NSF 2017-2018年27個科學技術卓越研究中心之一。研究方向為：無線傳感器網絡和移動自組織網絡；無線網絡和移動網絡動態模型的適配、設計和實現；無線多媒體網絡中的無線電資源分配；移動與高性能計算等。李教授出版專著5部，在Advances in Applied Probability、Journal of Applied Probability等期刊和國際會議上發表專業論文200余篇，科研經費達600萬美金。
