Overview of the application of High Altitude Platform (HAP) systems in future telecommunication networks

This paper presents an overview of the existing high altitude platform (HAP) systems, and analyzes their application on different network types, such as two way (hybrid) communication networks, intelligent transportation systems, environmental monitoring, etc. Since HAPs have specific inherent advantages, their use can be widespread in future applications and networks. This paper focuses on the technological issues that are related to HAP systems and the possible ways through which they can be interconnected to other networks (terrestrial or satellite).