基于轨迹挖掘的水声传感器网络数据传输相关技术的研究

The data transmission techniques of underwater acoustic sensor networks (UASNs) make the monitored data be delivered from the mobile sensor nodes to the sinks for further processing. Due to the severe underwater environment and the node mobility, the communication links between nodes are always intermittent. Therefore, the transient encounters between nodes should be exploited for transmitting the data packets. Under the external force, the node trajectories are usually sophisticated and diverse, and the availability of mobile trajectories has not been paid enough attention. Specially, these trajectories have some regularities and self-similarities. Some behavior patterns and trajectory patterns of nodes which are hidden and valuable can be mined from these trajectories to predict the mobility tendency, group mobility, the encountering opportunities and the encountering periods. Moreover, the prediction results can be taken as the vital basis for data dissemination decisions. In this project, the techniques of anchored node deployment, floating node localization, trajectory mining and opportunistic dissemination will be investigated, and it is hoped that a preferable data transmission scheme (with high delivery ratio, short propagation delay, low transmission cost, etc.) can be proposed, through integrating the above mentioned techniques.

水声传感器网络 (UASNs)数据传输技术使得监测数据能够从移动传感器节点传递到汇聚节点进行处理。水下恶劣环境和节点移动使得节点间的通信链接往往是间歇和短暂的，因此必须利用节点间的短暂相遇机会来转发数据。水下节点移动轨迹较为复杂并且类型多样，移动过程中所产生的大量轨迹数据并未得到充分关注与利用，这些轨迹数据呈现出一定的重现性和自相似性，从这些移动轨迹中提取出隐含的、有价值的节点行为模式和轨迹模式，进而判断出节点未来时刻的移动倾向、群组移动关系、节点相遇机会及相遇时长等，将成为数据转发决策的重要依据。本课题将围绕UASNs数据传输相关技术，如锚定节点部署、漂游节点定位、移动轨迹挖掘和机会转发等技术开展研究，期望通过合理地部署锚定节点、准确地获得漂游节点实时坐标以及对漂游节点移动模式的挖掘，从而设计出满足高送达率、短传输时延、低传输代价等目标的UASNs数据传输方案。

水声传感器网络 (UASNs)数据传输技术使得监测数据能够从移动传感器节点传递到汇聚节点进行处理。水下恶劣环境和节点移动使得节点间的通信链接往往是间歇和短暂的，因此必须利用节点间的短暂相遇机会来转发数据。水下节点移动轨迹较为复杂并且类型多样，移动过程中所产生的轨迹数据具有较高的价值，从这些移动轨迹中提取出隐含的、有价值的节点行为模式和轨迹模式，可以作为数据转发的依据。本项目围绕UASNs数据传输相关技术，如锚定节点部署、漂游节点定位、移动轨迹挖掘和机会转发等技术开展了研究，通过合理地部署锚定节点、准确地获得漂游节点实时坐标以及对漂游节点移动模式的挖掘，设计了满足高送达率、短传输时延、低传输代价等目标的UASNs数据传输方案。本项目成果可以广泛应用于水下污染监控、水文信息采集、水下军事入侵监测等诸多水下场景。