Lv Zhichao, Zhang Jie, Jin Jiucai, Li Qi, Gao Baoru
Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China.
First Institute of Oceanography, State Oceanic Administration, Qingdao 266100, China.
Sensors (Basel). 2018 Apr 16;18(4):1211. doi: 10.3390/s18041211.
The Unmanned Surface Vehicle (USV) integrated with an acoustic modem is a novel mobile vehicle for data collection, which has an advantage in terms of mobility, efficiency, and collection cost. In the scenario of data collection, the USV is controlled autonomously along the planning trajectory and the data of underwater nodes are dynamically collected. In order to improve the efficiency of data collection and extend the life of the underwater nodes, a mobile data collection protocol for underwater nodes using the USV was proposed. In the protocol, the stop-and-wait ARQ transmission mechanism is adopted, where the duty cycle is designed considering the ratio between the sleep mode and the detection mode, and the transmission ratio is defined by the duty cycle, wake-up signal cycles, and USV’s speed. According to protocol, the evaluation index for energy consumption is constructed based on the duty cycle and the transmission ratio. The energy consumption of the protocol is simulated and analyzed using the mobile communication experiment data of USV, taking into consideration USV’s speed, data sequence length, and duty cycle. Optimized protocol parameters are identified, which in turn denotes the proposed protocol’s feasibility and effectiveness.
集成声学调制解调器的无人水面航行器（USV）是一种新型的数据采集移动平台，在机动性、效率和采集成本方面具有优势。在数据采集场景中，无人水面航行器沿着规划轨迹自主控制，动态采集水下节点的数据。为了提高数据采集效率并延长水下节点的寿命，提出了一种使用无人水面航行器的水下节点移动数据采集协议。该协议采用停止等待自动重传请求（ARQ）传输机制，其中占空比是根据睡眠模式与检测模式的比例设计的，传输率由占空比、唤醒信号周期和无人水面航行器的速度定义。根据该协议，基于占空比和传输率构建了能耗评估指标。利用无人水面航行器的移动通信实验数据，考虑无人水面航行器的速度、数据序列长度和占空比，对该协议的能耗进行了模拟和分析。确定了优化的协议参数，这反过来表明了所提出协议的可行性和有效性。
