Modeling of interference maps for Licensed Shared Access in LTE-advanced networks supporting Carrier Aggregation

Cognitive Radio based Dynamic Spectrum Access (CR-DSA) has been envisaged as the foremost solution to eliminate the impending false scarcity of the radio frequency spectrum and to combat the dramatic surge in mobile data traffic. Furthermore, the revolutionary concepts - Carrier Aggregation (CA) and Licensed Shared Access (LSA) - have been conceived to support higher data rates by aggregating bandwidth from different parts of the spectrum, and to provide for a predictable Quality of Service (QoS) through spectrum sharing, respectively, so as to enhance the performance of the current generation mobile communication systems. However, an inevitable consequence of spectrum sharing is the interference induced upon the incumbent user. In this work, the prime focus of attention is on the mitigation of the interference caused by an LSA-licensed LTE-Advanced Radio Access Network (RAN) in the uplink (UL). To this end, we propose an interference management scheme based on Radio Environment Maps (REMs). Different approaches have been considered for the modeling of the requisite maps and a performance comparison between them by means of detection theory is presented. In conclusion, we prove the superior performance of the kriging spatial interpolation technique over the other approaches.