Abstract
In order for a Mobile Device (MD) to support the Licensed Shared Access (LSA), the MD should be reconfigurable, meaning that the configuration of a MD must be adaptively changed in accordance with the communication standard adopted in a given LSA system. Based on the standard architecture for reconfigurable MD defined in Working Group (WG) 2 of the Technical Committee (TC) Reconfigurable Radio System (RRS) of the European Telecommunications Standards Institute (ETSI), this paper presents a procedure to transfer control signals among the software entities of a reconfigurable MD required for implementing the LSA. This paper also presents an implementation of a reconfigurable MD prototype that realizes the proposed procedure. The modem and Radio Frequency (RF) part of the prototype MD are implemented with the NVIDIA GeForce GTX Titan Graphic Processing Unit (GPU) and the Universal Software Radio Peripheral (USRP) N210, respectively. With a preset scenario that consists of five time slots from different signal environments, we demonstrate superb performance of the reconfigurable MD in comparison to the conventional nonreconfigurable MD in terms of the data receiving rate available in the LSA band at 2.3–2.4 GHz.
Highlights
Global mobile data traffic is expected to grow up to 24.3 exabytes per month by 2019, which is nearly a tenfold increase compared to the traffic in 2014 [1]
One is a legacy Mobile Device (MD) of which the configuration is fixed with Frequency Division Duplexing (FDD) Long Term Evolution (LTE), and the other is capable of changing its configuration between FDD LTE and Time-Division Duplexing (TDD) LTE depending on the given signal environment
Whenever the Quality of Service (QoS) is not maintained, assuming the Licensed Shared Access (LSA) band is available in the present region, a reconfigurable MD changes its configuration from FDD LTE to TDD LTE
Summary
Global mobile data traffic is expected to grow up to 24.3 exabytes per month by 2019, which is nearly a tenfold increase compared to the traffic in 2014 [1]. The Cognitive Radio Trial Environment (CORE) demonstrated an LSA live test in the LSA band at 2.3–2.4 GHz [7], while Mustonen et al introduced a novel network architecture, namely, selforganizing networking features [8], to support LSA During this time, Working Group (WG) 1 of the Technical Committee (TC) on the Reconfigurable Radio System (RRS) of the European Telecommunications Standards Institute (ETSI) has been developing LSA-related standards. Assuming the LSA region adopts TDD LTE, as shown in [12], we demonstrate superb performance of the reconfigurable MD compared to a conventional nonreconfigurable MD in terms of the data receiving rate available in the LSA band at 2.3–2.4 GHz. In addition to the experimental tests performed with the implemented test-bed, computer simulations have been presented considering a scenario of multiple users in an LSA band.
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