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T. Berisha:
"Moving Relay Nodes on-board High Speed Trains in Austria: Is it worth it?";
Poster: Vienna Young Scientists Symposium - VSS 2017, Vienna; 06-01-2017 - 06-02-2017; in: "VSS 2017", Book-of-Abstracts.com, Heinz A. Krebs, Gumpoldskirchen, Austria (2017), ISBN: 978-3-9504017-5-2; 102 - 103.

A large number of passengers in Austria commute on a daily basis by using High Speed Trains
(HSTs). Nowadays, a large amount of passengers can be considered active mobile phone users. Due
to increased numbers of mobile users, the capacity problem is considerably introduced. To deal with
this issue, the railway company in Austria (OBB) has implemented Wi-Fi on-board the railjet high ¨
speed trains. However, this solution is able to minimize only the issues on last-hop. The main problem
is the deployment of base stations along a specific railway track. To deal with coverage issues, the
signal strengths for all User Equipments (UEs), 2G/3G/4G, should be increased by minimizing the
vehicular penetration loss. For this purpose we take the advantage of using two inter-connected multiband multi-operator amplify-and forward Moving Relay Nodes (MRNs).
The use of relay nodes in mobile networks is common. They have gained more attention to be applied
not only in fixed locations but on moving vehicles as well. By implementing the MRNs on-board the
HSTs we gain on both capacity and coverage. I focus in this work on the coverage results of 4G user
equipments along the railway that connects the two Austrian cities Vienna and Salzburg.

A large number of passengers in Austria commute on a daily basis by using High Speed Trains
(HSTs). Nowadays, a large amount of passengers can be considered active mobile phone users. Due
to increased numbers of mobile users, the capacity problem is considerably introduced. To deal with
this issue, the railway company in Austria (OBB) has implemented Wi-Fi on-board the railjet high ¨
speed trains. However, this solution is able to minimize only the issues on last-hop. The main problem
is the deployment of base stations along a specific railway track. To deal with coverage issues, the
signal strengths for all User Equipments (UEs), 2G/3G/4G, should be increased by minimizing the
vehicular penetration loss. For this purpose we take the advantage of using two inter-connected multiband multi-operator amplify-and forward Moving Relay Nodes (MRNs).
The use of relay nodes in mobile networks is common. They have gained more attention to be applied
not only in fixed locations but on moving vehicles as well. By implementing the MRNs on-board the
HSTs we gain on both capacity and coverage. I focus in this work on the coverage results of 4G user
equipments along the railway that connects the two Austrian cities Vienna and Salzburg.

http://publik.tuwien.ac.at/files/publik_261006.pdf