Koval M. Models and methods of self-organization of sensor networks for ensuring their connectivity in the conditions of interfering environment

The dissertation on competition for a scientific degree the doctor of philosophy, branch of knowledge 12 "Information technologies" in specialty 122. – Taras Shevchenko National University of Kyiv, Kyiv, 2020. One of the main functions of information systems is to provide access to information at any time, regardless of location to users. All other requirements, in particular performance, manageability, compatibility, security and scalability, are related to the quality of this basic task. At present, sensor networks, and especially wireless sensor networks, are developing rapidly. The impetus for their development was military technology, such as surveillance systems in conflict zones. Today, these systems consist of distributed independent devices equipped with sensors to monitor physical condition and involved in automation, transportation, health care and many other areas. Wireless sensor networks operate under the influence of external and internal destabilizing factors. Adverse effects can cause network elements to fail. Therefore, in such conditions it is necessary to ensure continuous autonomous operation of wireless sensor networks. This operation can be performed by providing the property of functional stability. Under the functional stability of a complex technical system in the work means the possibility of functioning of the system, although with declining quality, for a given time under the influence of external and internal destabilizing factors. External and internal destabilizing factors are failures of system elements, combat damage, electromagnetic interference, intentional damage, errors of personnel operating or using the system. Ensuring the properties of functional stability of any information system is carried out in several stages: detection of an atypical situation, localization of an atypical situation, restoration of the system through the redistribution of resources of its elements.