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Item type:Publication, Access status: with files , AHOI: Inexpensive, low-power communication and localization for underwater sensor networks and μAUVs(Association for Computing Machinery (ACM), 2020-01); ; The recent development of small, cheap AUVs enables a plethora of underwater near- and inshore applications. Among these are monitoring of wind parks, detection of pollution sources, water-quality inspection, and the support of divers during disaster management. These tasks profit from online reporting, control, and AUV swarm interaction; yet they require underwater communication. Unfortunately, commercial devices are prohibitively expensive and typically closed-source, hampering their application in affordable products and research. Therefore, we developed the open-source1 ahoi acoustic modem. It is (i) small enough to be carried by micro AUVs, (ii) consumes little enough energy to not diminish operation times of its host, (iii) comes at an attractive unit cost below $600, (iv) can reliably communicate at distances of 150 m and more, and (v) supports ranging without additional hardware. Due to its modular build, the modem can be customized and is suitable as research platform to analyze, e.g., MAC and routing protocols. We conducted extensive real-world studies and present results of communication range, packet reception rate, ranging accuracy, and efficient and reliable self-localization. Finally, we draw conclusions regarding acoustic communication, ranging, and localization with inexpensive and low-power devices that go beyond a particular device. Our study, hence, encompasses general insights, observations, and recommendations.Publicationtype: Journal ArticleScopus© Citations 47 228 1467 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Resilience against shipping noise and interference of the AHOI acoustic underwater modem(2019-09); Underwater Wireless Sensor Networks (UWSNs) and micro Autonomous Underwater Vehicles (µAUVs) enable diverse underwater monitoring and service applications; e. g., observation of water quality or identification of pollution. Reliable underwater communication for data transmission between sensors, µAUVs and base stations is required. The smartPORT acoustic underwater modem AHOI is a small, low-power and low-cost modem, which was developed for these applications. This paper evaluates the modem’s resilience against shipping noise and packet interference in UWSNs. At first, noise and interference sources are presented, followed by a short description of the modems’s countermeasures. At last, simulated noise of ships and Autonomous Underwater Vehicles (AUVs) with different distances to the noise source were added to the communication signals and evaluated. And in addition, packet interference was simulated and evaluated in a real-world scenario.Publicationtype: Conference Paper84 152 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Underwater communications for the robotic vessels as-a-servic projectThis is an abstract of the exposed poster. The abstract of the poster is published on the conference website, but not in the proceedings.Publicationtype: Conference Poster not in Proceedings109 167