The effects of a Dynamic Spectrum Access overlay in LTE-Advanced networks

As early as 2014, wireless network operators' spectral capacity will be overwhelmed by the demand brought on by new devices and applications. To augment capacity and meet this demand, operators may choose to deploy a Dynamic Spectrum Access (DSA) overlay. The signaling and functionality required by such an overlay have not yet been fully considered in the architecture of the planned Long Term Evolution Advanced (LTE+) networks. This paper presents a Spectrum Accountability framework to be integrated into LTE+ architectures, defining specific element functionality, protocol interfaces, and signaling flow diagrams required to enforce the rights and responsibilities of primary and secondary users. We also quantify, through simulation, the benefits of using DSA channels to augment capacity. The framework proposed here may serve as a guide in the development of future LTE+ network standards that account for DSA.