Supporting Dynamic Spectrum Access in Heterogeneous LTE+ networks

Abstract

With Long Term Evolution Advanced (LTE+) networks likely as the future one world 4G standard, network operators may need to deploy a Dynamic Spectrum Access (DSA) overlay in Heterogeneous Networks (HetNets) to extend coverage, increase spectrum efficiency, and increase the capacity of these networks. In this paper, we propose three new management frameworks for DSA in an LTE+ HetNet: Spectrum Accountability Client, Cell Spectrum Management, and Domain Spectrum Management. For these spectrum management frameworks, we define protocol interfaces and operational signaling scenarios to support cooperative sensing, spectrum lease management, and alarm scenarios for rule adjustment. We also quantify, through integer programs, the benefits of using DSA in an LTE+ HetNet that can opportunistically reuse vacant TV and GSM spectrum. Using integer programs, we consider a topology using Geographic Information System data from the Blacksburg, VA metro area to assess the realistic benefits of DSA in an LTE+ HetNet.