Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 2018

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: maritime communication systems

Sortuj według:

Ogranicz wyniki do:

Szerokopasmowe systemy komunikacyjne na morzu - scenariusze użycia i przykładowe instalacje

Woźniak J., Gierłowski K., Hoeft M., Lewczuk M.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

2018

nr 8-9

545--557

Dokonano przeglądu technik dostępowych i systemów komunikacji morskiej wykorzystywanych aktualnie lub planowanych do użycia, zarówno do łączności między statkami, jak i statkami i lądem, w celu wspierania określonych usług, często ukierunkowanych na poprawę bezpieczeństwa na morzu oraz e-nawigację. Przegląd obejmuje zarówno rozwiązania naziemne, jak i przykładowe rozwiązania satelitarne. W pierwszej grupie systemów zaprezentowano zarówno proste instalacje portowe z transmisją jednoetapową, jak i znacznie bardziej złożone rozwiązania wieloskokowe, wykorzystujące topologie kratowe. Wskazano podstawowe cechy funkcjonalne takich systemów, także ich mocne strony oraz ograniczenia.

The paper presents an overview of popular technologies and systems currently developed or employed in maritime communication. These solutions are used to provide both ship-to-ship and ship-to-shore communication for the purpose of supporting specific services, often dedicated to maritime safety and e-navigation. The overview includes both terrestrial and example satellite solutions. In the first group of systems both simple single hop harbour installations as well much more complex multihop solutions, involving mesh topologies are considered. Functional features of such communication systems together with their advantages and limitations are also presented.

NetBaltic system – heterogeneous wireless network for maritime communications

Hoeft M., Gierłowski K., Rak J., Woźniak J.

Polish Maritime Research

2018

nr 2

14--26

In case of maritime communications, we observe a growing interest in deployment of multitask satellite-based solutions and development of new maritime-specific systems intended for improvements in safety of e-navigation. Analysis of different types of currently used maritime communication systems leads, however, to a conclusion that neither global and still very expensive satellite systems nor cheaper, but short-ranged transmission technologies can, on their own, fully meet the today’s expectations and quality requirements formulated for broadband maritime systems. This lack of reliable solutions, offering high throughput and ubiquitous availability of coverage to a wide audience at a relatively low price is one of the main barriers in a widespread implementation of e-navigation initiatives. This issue is addressed in the netBaltic project with the objective to design, deploy and validate in a real maritime environment a non-satellite wireless communication system enabling ship-to-ship and ship-to-shore information exchange via a multi-hop network composed of onshore base stations, maritime vessels and other transit elements such as buoys. In this paper, the idea of a heterogeneous wireless maritime system is presented. Details of the proposed netBaltic node architecture are described highlighting the solutions introduced in the project as a response to specific maritime communication requirements. Numerical results of communication area coverage are presented for four different scenarios utilizing different wireless transmission technologies. In particular, they indicate that when using appropriate wireless communication solutions, the number of vessels being able to connect to Internet is significantly increased as compared to traditional wireless systems (capable of one-hop communication) from 14% for short-range transmission technologies up to as high as 127% in case when relatively long-range transmission technologies are employed within the system.