Dynamic Joint Carrier Aggregation Group Formation and Interference Alignments for Femtocell in LTE-A

Abstract

The customer-installed femtocell is considered an efficient technique for solving the coverage and data rate problems inside buildings. In this work, we introduce a component carrier (CC) group selection mechanism that helps the femtocells to find the optimal carrier aggregation (CA) for an LTE-A network, relies on the principle of distribution architecture. This mechanism is adopted from cellular manufacturing systems for the machinepart formation problem. By optimizing the CA selection, the proposed scheme can avoid the interference among femtocells and eNodeBs, maximize the system spectral efficiency, and enhance the coverage. A self-organization model for minimizing the variance between the CCs within the CA groups is introduced, where a novel interference threshold calculation is derived to bias the selection of the optimal group.