Field trial of the 3.5 GHz citizens broadband radio service governed by a spectrum access system (SAS)

In this paper, we describe a spectrum access system (SAS) based Citizens Broadband Radio Service (CBRS) field trial using a live LTE network in the 3.5 GHz band. The latest WInnForum specification guided the implementation of the relevant protocols for SAS operation. Here, we evaluate the performance of a CBRS field trial by using one of the most important performance indicators in a spectrum sharing scenario — the evacuation time. It indicates how rapidly the secondary user relinquishes the shared spectrum band to the primary user. Following the applied protocols, we measure and analyze the time scales for the evacuation and frequency change procedures in a field trial environment. Our work shows that the set time limits for the protection of primary users against interference are realistic when using commercially available mobile networks and equipment. Finally, utilizing knowledge of the latest base station models, we propose ways to reduce the evacuation and reconfiguration time by up to 70%.

[1]  Marja Matinmikko,et al.  Evaluation of recent spectrum sharing models from the regulatory point of view , 2014, 1st International Conference on 5G for Ubiquitous Connectivity.

[2]  Xiaofu Ma,et al.  Practical Issues for Spectrum Management With Cognitive Radios , 2014, Proceedings of the IEEE.

[3]  Jeffrey H. Reed,et al.  Spectrum access system for the citizen broadband radio service , 2015, IEEE Communications Magazine.

[4]  Marko Höyhtyä.  Sharing FSS satellite C band with secondary small cells and D2D communications , 2015, 2015 IEEE International Conference on Communication Workshop (ICCW).

[5]  Joseph Mitola,et al.  Cognitive radio: making software radios more personal , 1999, IEEE Wirel. Commun..

[6]  Dipankar Raychaudhuri,et al.  Coordinated dynamic spectrum management of LTE-U and Wi-Fi networks , 2015, 2015 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN).

[7]  Martin B. H. Weiss,et al.  Socio-technical considerations for Spectrum Access System (SAS) design , 2015, 2015 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN).

[8]  Jihoon Ryoo,et al.  Design and implementation of an end-to-end architecture for 3.5 GHz shared spectrum , 2015, 2015 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN).

[9]  Jarkko Paavola,et al.  Live field trial of Licensed Shared Access (LSA) concept using LTE network in 2.3 GHz band , 2014, 2014 IEEE International Symposium on Dynamic Spectrum Access Networks (DYSPAN).

[10]  Toby Youell,et al.  Licensed Shared Access , 2015 .