On the Spectrum and Energy Efficiency in Dynamic Licensed Shared Access Systems:A Multiobjective Optimization Approach

Onidare, Samuel and Navaie, Keivan and Ni, Qiang (2019) On the Spectrum and Energy Efficiency in Dynamic Licensed Shared Access Systems:A Multiobjective Optimization Approach. IEEE Access, 7. pp. 164517-164532. ISSN 2169-3536

Full text not available from this repository.

Abstract

In licensed shared access (LSA) systems, the protection of the incumbent in the shared spectrum may degrade the spectrum and energy efficiency of the licensee. In this paper, we examine the optimization of these two performance metrics in a LSA vertical sharing scenario between an airport incumbent, and a mobile network operator licensee. Considering a restriction zone of a pre-defined radius, we derive the probability of the incumbent's interference threshold and then formulate a power allocation scheme as a multi-objective optimization of both energy and spectrum efficiency. We then adopt the weighted sum method to convert this multi-objective optimization into a single objective optimization and convert that into a quasi concave optimization problem. The optimum power allocation is then obtained using fractional programming. We further investigate the impact of various critical operational parameters in conjunction with the two performance metrics. Simulation results indicate a significantly improved energy efficiency in the licensee network as well as the spectrum efficiency comparable to even when the LSA spectrum utilization is unrestricted by the incumbent's maximum interference threshold. Furthermore, we show that with careful selection of the licensee eNodeB coverage radius, transmit power, and users number per eNodeB coverage area, one can engineer the best possible trade-off between the spectrum and energy efficiency.

Item Type:
Journal Article
Journal or Publication Title:
IEEE Access
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2500
Subjects:
ID Code:
138968
Deposited By:
Deposited On:
14 Nov 2019 11:35
Refereed?:
Yes
Published?:
Published
Last Modified:
23 Sep 2020 05:48