Goya Odriozola, J. (Jon)
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- Alarm collector in smart train based on ethereum blockchain events-log.(IEEE, 2021-09) Mendizabal-Samper, J. (Jaizki); Adin-Marcos, I.(Iñigo); Goya Odriozola, J. (Jon); Añorga-Benito, J.(Javier); Figueroa-Lorenzo, S. (Santiago); Arrizabalaga-Juaristi, S. (Saioa)The European Union is moving toward the "smart" era having as one of the key topics the smart mobility. What is more, the European union (EU) is moving toward Mobility as a Service (MaaS). The key concept behind MaaS is the capability to offer both the traveler's mobility and goods' transport solutions based on travel needs. For example, unique payment methods, intermodal tickets, passenger services, freight transport services, etc. The introduction of new services implies the integration of many Internet-of-Things (IoT) sensors. At this point, security gains a key role in the railway sector. Considering an environment where sensor data are monitored from sensor events, and alarms are detected and emitted when events contain an anomaly, this document proposes the development of an alarms collection system, which ensures both traceability and privacy of these alarms. This system is based on Ethereum blockchain events-log, as an efficient storage mechanism, which guarantees that any railway entity can participate in the network, ensuring both entity security and information privacy.
- A review of the evolution of the integrity methods applied in GNSS(IEEE, 2020) Pérez, A. (Alejandro); de-Miguel, G. (Gorka); Zabalegui-Landa, P. (Paul); Mendizabal-Samper, J. (Jaizki); Adin-Marcos, I.(Iñigo); Goya Odriozola, J. (Jon)The use of GNSS technologies has been spreading over time up to a point in which a huge diversity of applications require their use. Due to this demand, GNSS has turned into a more reliable technology, as multiple aspects of it have evolved. Integrity has become a vital aspect of being considered when using GNSS. The following document gathers and shows different aspects of integrity in terms of GNSS. The paper mainly focuses on the description of different receiver autonomous integrity monitoring methods. For this purpose, basic concepts and possible GNSS error sources (and their corresponding solutions) are introduced. Afterward, an explanation and a classification of the integrity monitoring techniques is given, where the fault detection and exclusion methods and different protection level computation formulas are analyzed.
- Residual based fault detection and exclusion methods applied to Ultra-Wideband navigation.(Elsevier, 2021-07) de-Miguel, G. (Gorka); Zabalegui-Landa, P. (Paul); Mendizabal-Samper, J. (Jaizki); Adin-Marcos, I.(Iñigo); Goya Odriozola, J. (Jon); Moya, I. (Iker)Global Navigation Satellite System (GNSS) has become the main technology in terms of navigation technologies, as it ensures a worldwide absolute outdoor positioning. The transportation sector employs this technology to obtain a position, velocity and time solution for the corresponding outdoor application. When talking about indoor positioning, nevertheless, GNSS becomes an unreliable navigation technology, as the below-noise signals get obstructed. In these cases, the Ultra-Wideband (UWB) technology can be used as a navigation solution, as its anchor trilateration based radiofrequency positioning resembles GNSS's principle and, depending on the anchor location, it can be used for indoor positioning. However, just like other radiofrequency based technologies, UWB is vulnerable to interferences and the multipath effect. With the aim of overcoming these drawbacks, this article discusses how to apply Fault Detection and Exclusion (FDE) techniques to avoid using faulty anchors when employing UWB in indoor/urban environments such as tunnels or train stations.
- An overview of current IP Network emulators for the validation of railways wireless communications(IEEE, 2020) de-Miguel, G. (Gorka); Mendizabal-Samper, J. (Jaizki); Goya Odriozola, J. (Jon); Fernández-Berrueta, N. (Nerea); Añorga, J. (Javier); Arrizabalaga-Juaristi, S. (Saioa)Communication technologies are in continuous evolution and as well, the different applications making use of them. In order to succeed with the roll-out of the communication-based applications, it is required that the communications technologies are intensively tested and validated before deployment. Current strategies for testing and validation cover field tests and laboratory tests. Railways is also taking advantage of the communication technologies evolution, and therefore, there is a need for having testing and validation strategies adapted to the railway environment, especially for safety-critical applications. Field tests and laboratory tests also apply in Railways. In the frame of laboratory tests, this paper includes an overview of different network emulators existing currently in the market. Furthermore, an analysis of the gaps of the network emulators with regards to the needs of the railways environment is also included. The goal of this paper is to show that network emulators are a flexible cost-effective solution for communication technologies testing purposes. Additionally, this paper also shows that there is a need to adapt current emulators to the railway environment in order to test and validate the future railway applications based on communication technologies.
- Methodology and key performance indicators (KPIs) for railway on-board positioning systems(IEEE, 2018-12) de-Miguel, G. (Gorka); Zamora-Cardenas, L. (Leticia); Mendizabal-Samper, J. (Jaizki); Adin-Marcos, I.(Iñigo); Goya Odriozola, J. (Jon); Arrizabalaga-Juaristi, S. (Saioa)The European Union (EU) is bolstering the railway sector with the aim of making it a direct competitor of the aviation sector. For that to occur, railway efficiency has to be improved by means of increasing capacity and reducing operational expenditure. Tracks are currently used below their maximum capacity. Given this fact and the EU's goals for the railway sector, research on solutions for on-board positioning system based on global navigation satellite systems (GNSS) have arisen in recent years. By taking advantage of GNSS, safety critical positioning systems will be able to use the infrastructure more efficiently. However, GNSS based positioning systems still cannot fulfill current normative validation processes, mainly, due to the fact that GNSS based positioning performance evaluation is not compatible with the key performance indicators (KPIs) used to assess railway systems performance: reliability, availability, maintainability, and safety. This paper proposes a methodology and unified key performance indicators (KPIs). Additionally, it shows real examples to address this issue. It aims to fill the gap between the current railway standardization process and any on-board positioning system.