Diseño e implementación de una metodología de asignación de recursos radio eficiente para redes vehiculares

• DIRECTOR: Unai Hernández Jayo
• UNIVERSITY: Deusto

Abstract:

The communication of the vehicle with its environment, known as V2X (Vehicle-to-Everything), is presented as an emerging paradigm capable of being one of the main factors of the next revolution in the automotive world. V2X is a wireless technology that allows communication between vehicles, infrastructure, other types of devices (sensors, pedestrians, etc.) and the existing wired communications network. This type of communication is the basis for the deployment of the so-called Cooperative Intelligent Transport Systems (C-ITS), which increase road safety, improve traffic management and efficiency and provide new experiences and services to passengers during their journeys.

V2X systems can be deployed using different wireless technologies. This work is focused on enabling C-ITS systems using cellular technologies, mainly LTE or its 5G evolution.

One of the biggest problems in this type of communications is being able to satisfy the demanding quality of service requirements demanded by security and entertainment applications in environments where there is a high density of vehicles. In addition, it should be borne in mind that until now the main consumers of cellular networks were the regular users. Therefore, even though vehicles are becoming part of the cellular network customer group, it is essential to maintain and increase the quality of service that has been offered to regular cellular users so far.

Therefore, in a cellular network in which a large number of cellular users already coexist, if we add new nodes such as vehicles, efficient radio resource management is undoubtedly an extremely important element for deploying cooperative applications with different quality of service requirements. A vast number of different radio resource allocation methodologies can be found in the current literature. Due to the fact that the radio spectrum is a limited resource and the high complexity of the problem to be solved, there is no definitive methodology that can optimally resolve all possible scenarios. This makes the field of radio resource management and allocation a hot research topic.

As a result, the present doctoral thesis focuses on the design and implementation of a methodology for the radio resource allocation for cellular networks in which regular cellular users and vehicles co-exist. The proposed methodology offers added value compared to existing methodologies in the literature, due both to its originality and to the performance levels it offers to regular user communications, as well as to the V2X links created.

With the intention of validating the proposed methodology, an extensive experimentation has been carried out. The results of this experimentation have been compared with other reference methodologies and previously contrasted in the literature. Thanks to this experimentation, it has been possible to rigorously state that the proposed technique is competitive in different metrics based on the throughput offered to users, the energy efficiency of communications between vehicles, the energy efficiency of the communications of the global group of users and, the proposed methodology is particularly competitive in terms of spectral efficiency.