| Currently, Long Term Evolution-Advanced(LTE-A), which is proposed and driven by the 3rd Generation Partnership Project (3GPP) and to achieve high rate and low latency, has become the most widely used standard of 4th generation mobile communication in the global. With the rapidly growing of mobile data traffic and development of LTE-A network, macro cell in LTE-A network can’t meet the demand of user data traffic. So Carrier Aggregation and Small Cell have been introduced to overcome this problem.Carrier Aggregation in Release 10 supports up to 5 carriers and the goal of 3 GPP in Release 13 is to expand CA up to 32 carriers. The physical control information is transsimitted in Primary Cell. With the increasing number of carriers, the overhead of PCell will also increase. The paper introduces a wider-band carrier, which combines scattered segments next Backward-compatible Carriers, to decrease the number of Carrier Compenents.With the widely deployment of Small Cell, new challenges have been brought as the coverage problem of hot spot spaces has been solved. In the hot spot space, the deployment density is large and the distance is short, which increase the coverage of inter-cell overlapping area and make the interference more complexity. At the same time, users’experience will be influenced greatly and more power is needed. The thesis proposes a Small Cell balance sleep mechanism by introducing a power weigh argument, reasonable system model and sleep process aiming at making Small Cells with low load sleep and reducing energy consumption, while avoiding user quality of service degration.In order to accurately evaluate the performance of new technical solutions, the paper adopts a LTE-A system-level simulation platform according to 3 GPP SCE scenario. The paper introduces Bandwidth Extension Carrier into SCE scenario, analyzes the system performance of Bandwidth Extension Carrier and Small Cell balance sleep scheme in SCE scenario. |
