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Open AccessFeature PaperArticle

An Adaptable Train-to-Ground Communication Architecture Based on the 5G Technological Enabler SDN

Department of Communications Engineering, University of the Basque Country (UPV/EHU), 48013 Bilbao, Spain
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Electronics 2019, 8(6), 660; https://doi.org/10.3390/electronics8060660
Received: 29 April 2019 / Revised: 7 June 2019 / Accepted: 10 June 2019 / Published: 12 June 2019
Railway communications are closely impacted by the evolution and availability of new wireless communication technologies. Traditionally, the critical nature of railway services, the long lifecycle of rolling stock, and their certification processes challenge the adoption of the latest communication technologies. A current railway telecom trend to solve this problem is to design a flexible and adaptable communication architecture that enables the detachment of the railway services—at the application layer—and the access technologies underneath, such as 5G and beyond. One of the enablers of this detachment approach is software-defined networking (SDN)—included in 5G architecture—due to its ability to programmatically and dynamically control the network behavior via open interfaces and abstract lower-level functionalities. In this paper, we design a novel railway train-to-ground (T2G) communication architecture based on the 5G technological enabler SDN and on the transport-level redundancy technique multipath TCP (MPTCP). The goal is to provide an adaptable and multitechnology communication service while enhancing the network performance of current systems. MPTCP offers end-to-end (E2E) redundancy by the aggregation of multiple access technologies, and SDN introduces path diversity to offer a resilient and reliable communication. We carry out simulation studies to compare the performance of the legacy communication architecture with our novel approach. The results demonstrate a clear improvement in the failover response time while maintaining and even improving the uplink and downlink overall data rates. View Full-Text
Keywords: 5G; train-to-ground; software-defined networking; multipath TCP; adaptable; reliability; resiliency; path diversity 5G; train-to-ground; software-defined networking; multipath TCP; adaptable; reliability; resiliency; path diversity
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Franco, D.; Aguado, M.; Toledo, N. An Adaptable Train-to-Ground Communication Architecture Based on the 5G Technological Enabler SDN. Electronics 2019, 8, 660.

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