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1
Content available Analytical - diffraction model of V-band propagation for the Radiocommunication Events Management System (REMS)
Mąka Marcin, Majzner Piotr
Annual of Navigation
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2019
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No. 26
127--135
EN
The paper presents an analytical-diffraction propagation model for the needs of the Radiocommunication Events Management System, for coast and ship radio stations in sea area A1. The V-wave propagation in sea area 1 has been analyzed as part of an analysis of ranges of particular radio stations and their ability to establish radio contact. The theoretical basis and assumptions on which the model structure design process is based have been presented. Methods of modelling and presentation of dislocation of particular radio stations and their ranges have been discussed.
2
Content available The radio operator decision support system model
Mąka M., Majzner P.
Zeszyty Naukowe Akademii Morskiej w Szczecinie
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2017
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nr 52 (124)
120--127
EN
The article proposes a model of the system supporting the decision-making process relating to the radio operator on board a ship after a distress alert is received by a Digital Selective Calling (DSC) controller working on VHF channel 70. The model is aimed at the implementation into the system of radiocommunication event management. The system takes into account the existing Radio Regulations. The model makes use of Petri nets, which are elements of graph theory. The time domain is comprised in the developed graph, and the states (places) and transitions capable of autonomous functioning are separated, as are those places and transitions requiring direct operator action based on empirical knowledge.
3
Content available Radiocommunication event allocation model for a selected sea area
Mąka M., Majzner P., Lisaj A.
Zeszyty Naukowe Akademii Morskiej w Szczecinie
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2017
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nr 50 (122)
52--58
EN
This article presents the structure of a model of the allocation of radiocommunication events at coastal radio stations, land-based satellite stations and on vessels in sea area A3. The propagation of radio waves in the HF band has been analyzed to examine the range of various radio stations and their capabilities of establishing communication between each other. We also present methods of modeling and displaying the deployment of individual stations, of presenting radiocommunication events as a function of time using time diagrams, as well as the manner of the chronological presentation of radiocommunication events and related decisions. It has been shown that there is a relationship between the effectiveness of communication and propagation conditions that is strongly dependent on the time-of-day. We present the need to develop a decision support system for the radio operator on the bridge.
4
Radiocommunication event allocation model for sea area A2
Mąka M., Majzner P., Lisaj A.
Logistyka
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2015
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nr 4
7943--7951, CD2
EN
The paper presents a model of radiocommunications event allocation to coast and ship radio stations in sea area A2. The V- and T-wave propagation in sea area 2 has been analysed as part of an analysis of ranges of particular radio stations and their ability to establish radio contact. The theoretical basis and assumptions on which the model structure design process is based have been presented. Methods of modelling and presentation of dislocation of particular radio stations and their ranges have been discussed. A method of presentation of radio communications events in time, using time diagrams, has been developed. A method of presentation of a sequence of radio communication events and decisions based on them has been proposed.
PL
W artykule przedstawiono model alokacji zdarzeń radiokomunikacyjnych w obszarze A2. Przeanalizowano propagacje fal w pasmach V oraz T w aspekcie analizy zakresów poszczególnych stacji radiowych i ich zdolności do nawiązania kontaktu radiowego. Przedstawiono podstawy teoretyczne i założenia, na których opiera się proces projektowania modelu. Omówiono metody modelowania i prezentacji alokacji poszczególnych stacji radiowych i ich zakresy. Zaprezentowano sposoby prezentacji zdarzeń radiokomunikacyjnych, za pomocą diagramów czasowych. Zaproponowano sposób prezentacji sekwencji radiowych zdarzeń komunikacyjnych i decyzji podejmowanych na ich podstawie.
5
Content available A simulation model of Radiocommunication Events Management
Majzner P., Mąka M.
Zeszyty Naukowe / Akademia Morska w Szczecinie
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2014
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nr 37 (109)
61--65
EN
The presented simulation model of radiocommunication events management allows to investigate problems occurring in marine radiocommunications. Based on a variety of research methods, we focus on the method of computer-based simulation, and describe the stages of construction and structure of the simulation model. Finally, we discuss possible applications of the developed model.
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