Abstract
Two-point communication model of the wireless environment with one-beam and multi-beam propagation of radio waves were developed. The specified models make it possible to create various particular two-point communication models of wireless environment, taking into account the assigned geometry of location of shadowing and scattering structures in the environment. The practical use of the proposed models is limited to arbitrary points of radiation and reception in the environment, taking into account location of directional aerials in them. To study known multipoint technologies under conditions of emergency situations, we developed the multipoint communication models with one-beam and multibeam propagation of radio waves from each radiation point to each reception point, predetermined by the presence of shadowing and scattering structures in the environment. The developed multipoint models make it possible to create specific models at the physical level for various multi-aerial technologies, taking into consideration the use of aerial arrays of arbitrary configuration at the transmitting and receiving sides. Verification of the developed communication models of the wireless environment was performed. It was found that the use of directional aerials at the transmitting and receiving sides of the wireless environment in the presence of considerable shadowing and scattering structures makes it possible to significantly improve noise immunity. It is noted that with the use of the developed communication models, it is possible to carry out in-depth examination of the physical level with a view to developing a reliable and stable architecture of communications under conditions of emergency situations.
Highlights
A reliable communication system is necessary in order to organize rescue operations in emergency situations (ES)
This study is limited to the consideration of communication models of wireless environment (WE) and characteristics of the applied transmitting and receiving aerials, parameters of which do not change over time and in space, except for the function of radio waves attenuation and scattering in beams
The proposed models differ from known models by using the beam approach with finite width of beams
Summary
A reliable communication system is necessary in order to organize rescue operations in emergency situations (ES). The communication system of ES should be able to rapidly create an infrastructure for supporting the interaction between groups of rescuers and survivors In this regard, it is relevant to create reliable autonomous communication systems, capable of covering the disaster zone quickly in order to restore network interaction. The implementation of this concept implies development of specialized systems of vehicle positioning in an emergency zone and mobile communication with a rapidly changing topology at a limited frequency resource Under these conditions, in order to increase communication capacities of wireless networks, paper [6] proposes the use of a dynamic access to the frequency resource. The complexity and diversity of actual WE in ES, as well as an objective need for reliable communication technologies, make the development of communication models of WE in ES relevant
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
