Location-Based Hybrid Spectrum Allocation and Reuse for Tiered LTE-A Networks

The concept of small cells such as femtocell has been regarded as a promising solution to achieve green communication and deal with the coverage hole and growth of traffic within macrocells. However, the unpredictable deployment pattern of such nodes makes static network planing impractical and the overlaying macrocell and femtocell tiers may suffer significant cross-tier interference from each other. In this paper, we analyze the cross-tier interference scenarios and propose corresponding semi-static resource allocation schemes to achieve the best tradeoff between spectrum efficiency and interference cancellation by applying hybrid shared and partitioned spectrum usage according to the location based measurement of the femtocell. Extensive system simulation is performed to demonstrate that the proposed scheme can effectively avoid spectrum collision and significantly improve the overall network capacity.