赖永炫副教授受邀于2016年11月24日下午访问了华侨大学计算机学院，并与计算机学院师生进行深入的学术交流和讨论。赖永炫老师做了题为《基于快速移动元素的自适应数据收集》的报告，重点讲述了利用无人机对动态时延容忍型传感器网络进行数据收集的细节设计；并介绍了车联网及雾计算技术的一些关键进展和挑战性问题。

报告题目：AdaptiveData Gathering Using Speedy Mobile Elements

报告摘要：

Data gathering is a key operatorfor applications in wireless sensor networks, yet it is also a challengingproblem in mobile sensor networks when considering all nodes are mobile and thecommunications among them are opportunistic. We proposed an efficient datagathering scheme called ADG that adopts speedy mobile elements as the mobiledata collector and takes advantage of the movement patterns of the network. ADGmaps the data gathering into the Proxy node Time Slot Allocation (PTSA) problemthat schedules the time slots and orders, according to which the data collectorcould gather the maximal amount of data within a limited period. Extensiveexperimental results show that our scheme outperforms other data gatheringschemes on the cost of message transmissions and the data gathering rate,especially under the constraint of limited data gathering period.