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Sensors 2013, 13(2), 2051-2075; doi:10.3390/s130202051

A Cognitive Mobile BTS Solution with Software-Defined Radioelectric Sensing

1
Gradiant, CITEXVI, Campus Universitario, Vigo 36310, Spain
2
Department of Communications and Information Technologies, Universidad Politécnica de Cartagena, Cartagena 30202, Spain
3
AtlantTIC, University of Vigo, Campus Universitario, Vigo 36310, Spain
*
Author to whom correspondence should be addressed.
Received: 7 November 2012 / Revised: 23 January 2013 / Accepted: 30 January 2013 / Published: 5 February 2013
(This article belongs to the Section Physical Sensors)

Abstract

Private communications inside large vehicles such as ships may be effectively provided using standard cellular systems. In this paper we propose a new solution based on software-defined radio with electromagnetic sensing support. Software-defined radio allows low-cost developments and, potentially, added-value services not available in commercial cellular networks. The platform of reference, OpenBTS, only supports single-channel cells. Our proposal, however, has the ability of changing BTS channel frequency without disrupting ongoing communications. This ability should be mandatory in vehicular environments, where neighbouring cell configurations may change rapidly, so a moving cell must be reconfigured in real-time to avoid interferences. Full details about frequency occupancy sensing and the channel reselection procedure are provided in this paper. Moreover, a procedure for fast terminal detection is proposed. This may be decisive in emergency situations, e.g., if someone falls overboard. Different tests confirm the feasibility of our proposal and its compatibility with commercial GSM terminals.
Keywords: SDR; cognitive radio; mobile communications; vehicular communications; BTS; cellular communications SDR; cognitive radio; mobile communications; vehicular communications; BTS; cellular communications
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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Muñoz, J.; Alonso, J.V.; García, F.Q.; Costas, S.; Pillado, M.; Castaño, F.J.G.; Sánchez, M.G.; Valcarce, R.L.; Bravo, C.L. A Cognitive Mobile BTS Solution with Software-Defined Radioelectric Sensing. Sensors 2013, 13, 2051-2075.

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