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Link Quality Assessment Algorithm for Heterogeneous Self-organizing Maritime Communications Network

Bronk K., Lipka A., Niski R.

Journal of Telecommunications and Information Technology

2018

nr 2

32--40

The article introduces a method of performing a radio link quality assessment based on the Link Quality Indicator (LQI) which will be calculated for every system that is available. The method presented has been developed during the netBaltic project completed in Poland and generally applies to the so-called maritime zone A, i.e. the sea area where ships are still within the range of shore-based radio communication systems, particularly 3G/LTE cellular networks. The algorithm was developed based on the results of measurements obtained during two separate campaigns. That measurement data served as a basis for the method’s initial assumptions and was utilized during the method’s veriﬁcation.

Intelligent LQI-based wireless sensor network applied to ZigBee positioning system

Mon Y. J., Lin C. M.

Przegląd Elektrotechniczny

2013

R. 89, nr 5

241-244

In this paper, a link quality indicator (LQI) based wireless sensor network (WSN) constructed by a recurrent fuzzy neural network (RFNN) is developed as a ZigBee Positioning System (ZPS) to monitor and realize the tag of 802.15.4/ZigBee locations. First, the performance of LQI is demonstrated, then it is applied to develop a ZPS which is used to verify the performance of indoor location identification. Finally, an RFNN is used to combine with the ZPS to develop a location system, and it can be applied for children’s position monitoring. The experimental results demonstrate good positioning performance has been achieved by the proposed location system.

W artykule opisano sieć czujników bezprzewodowych zbudowaną za pomocą sieci neuronowej RFNN, na bazie metody LQI. Ma ona zastosowanie w protokole 802.15.4/ZigBee jako blok lokalizacji (ZigBee Positioning System). Omówione zostało zastosowanie LQI, który został wykorzystany w projektowaniu ZPS. Na koniec wykorzystano RFNN oraz ZPS w budowie systemu lokalizacji. Badania eksperymentalne potwierdziły skuteczność działania proponowanego systemu.