Browsing by Author "Naula Rojas, Luis Fernando"

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    Broadcast and analysis of traffic warning messages in a vanet network
    (SmartTech-IC, 2020) Naula Rojas, Luis Fernando; Segovia Vasquez, Andres Antonio
    Within the current cities the number of vehicles has shown a increase, giving rise in increase traffic, caused that the number of traffic accidents also increase. This is where the role of VANET networks can intervene with the goal of reducing and trying to avoid this type of accidents. A VANET network provides connection between a vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I) or a hybrid combination between these two, allowing a wide variety of safety, traffic management and assistance applications with safety precautions for drivers. With the increase of VANETS and its large number of applications, in this work is proposed to send warning messages to vehicles that are near intersections or circulate on a road using a Raspberry Pi development platform, websockets that is based on Node.js together with the Socket.io library in order to avoid collisions between vehicles, reduce traffic and warn drivers about the traffic signs that are to come.
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    Implementación del estándar IEEE 802.11.p sobre el dispositivo hack RF ONE en un ambiente controlado
    (Universidad de Cuenca, 2021-04-14) Guillín Jiménez, Diego Xavier; Naula Rojas, Luis Fernando; Astudillo Salinas, Darwin Fabián; Araujo Pacheco, Alcides Fabián
    Vehicular Ad Hoc Network (VANET) consists of interconnecting static and mobile nodes and focus on applications that support control tra c, safety and comfort. IEEE 802.11p is the standard containing the technical specifications. Moreover, many research studies on this standard have only been applied in simulations due to high hardware costs. This thesis work implements the IEEE 802.11p standard on GNU Radio on the HackRF ONE SDR device, due to its lower cost. In this context corresponding to the standard, the Physical Layer (PHY) and Media Access Control (MAC) layer will be implemented, and an application that broadcasts a message in static and mobile scenarios is deployed. Moreover, the infrastructure to be used is from a RSU (static station) mounted on a tra c light and the OBU (mobile station) mounted on a vehicle. Laboratory tests that are carried out in this thesis development, they are made to analyze and check the specifications of the standard, also tests in physical scenarios are carried out, an idealized scenario and a real scenario. In this last, static and mobile tests are carried out. The data that will be used to send and receive, correspond to the status of tra c light and will vary according to its arrangement. Finally, tests are carried out using di erent modulation schemes, variation in transmission power at di erent distances, and speeds. Also, a parameter setting is defined for signal transmission that fits into a reliable working range for the HackRF ONE device. Within the tests performed, the type of modulation and the most robust transmission rate for these scenarios are chosen. On the other hand, the data that was obtained was used to analyze the packets received, the throughput, and the delay in the di erent static and mobile scenarios.Vehicular Ad Hoc Network (VANET) consists of interconnecting static and mobile nodes and focus on applications that support control tra c, safety and comfort. IEEE 802.11p is the standard containing the technical specifications. Moreover, many research studies on this standard have only been applied in simulations due to high hardware costs. This thesis work implements the IEEE 802.11p standard on GNU Radio on the HackRF ONE SDR device, due to its lower cost. In this context corresponding to the standard, the Physical Layer (PHY) and Media Access Control (MAC) layer will be implemented, and an application that broadcasts a message in static and mobile scenarios is deployed. Moreover, the infrastructure to be used is from a RSU (static station) mounted on a tra c light and the OBU (mobile station) mounted on a vehicle. Laboratory tests that are carried out in this thesis development, they are made to analyze and check the specifications of the standard, also tests in physical scenarios are carried out, an idealized scenario and a real scenario. In this last, static and mobile tests are carried out. The data that will be used to send and receive, correspond to the status of tra c light and will vary according to its arrangement. Finally, tests are carried out using di erent modulation schemes, variation in transmission power at di erent distances, and speeds. Also, a parameter setting is defined for signal transmission that fits into a reliable working range for the HackRF ONE device. Within the tests performed, the type of modulation and the most robust transmission rate for these scenarios are chosen. On the other hand, the data that was obtained was used to analyze the packets received, the throughput, and the delay in the di erent static and mobile scenarios.