A Novel Component Carrier Selection Algorithm for LTE-Advanced Heterogeneous Networks

摘要

Carrier aggregation has been proposed in LTE-advanced to support a wider bandwidth up to 100 MHz. The basic aggregated unit is called component carrier (CC). CCs are shared among different devices. Therefore it may cause performance degradation due to severe interference. A good CC assignment mechanism is desired to alleviate the interference problem. In this article, we propose a CC selection algorithm called Interference Management based Component Carrier (IMCC) scheduling to tackle the problem in heterogeneous networking environments of Femto Access Points (FAPs) and Macro-cell base stations. IMCC assigns CCs according to the entire system information, such as, location of FAPs, location of UEs (User Equipments), and the channel quality based on an evolutionary approach. In this way, IMCC mitigates the interference, and improves the system throughput. We construct a simulation environment with some stripes of apartments, which is often used to evaluate the performance of FAPs in prior works. The simulation results indicate the proposed approach outperforms other algorithms and show the effectiveness of IMCC.