Interefence Management Of Home Enodebs In LTE System

With growing demand for data services, it is increasingly difficult to support the required data capacity through traditional macro eNBs. As a result, we anticipate the importance of such "non-traditional nodes" to improve capacity. These non-traditional nodes include low-power pico cells, hot-zone cells, home eNBs (HeNBs) or femto cells and relay nodes lacking a wired backhaul connection. We refer to a network deployment incorporating one or more eNB categories from the above as a heterogeneous network deployment. According to statistics, most of the application scenarios of multi-media and wideband traffic are indoor and hot-zone environment, so one of the key technologies of 3G deployment is to solve the indoor coverge of 3G networks.In the wireless network environment, the introduction of femtocells will definitely bring the interference problems, and the interference management and the interference coordination problems must be solved in the heterogeneous network cosist of macro cells and femtocells. The interference between femtocells and macrocells, and the interference between femtocells potentially deteriorate the performance of heterogeneous networks. Accordingly, it has important meaning to do some researches on interference management of femtocells and to obtain the appropriate resource coordination and allocation scheme.This paper studies the following interference scenarios:femtocells interfere with femtocells in the downlink, femtocells interfere with macrocell in the downlink, femtocell users interfere with femtocell in the uplink and femtocells coexist with marocells in the uplink. The paper proposes Adaptive Frequency Partition (AFP), Orthogonal Frequency Partition (OFP), Adaptive Frequency Reuse (AFR), Adaptive Power Control (APC), Adaptive Fraction Frequency Reuse (AFFR) and Frequency Patition with Power Control (FPPC). Through system lever simulations, this paper compare the average cell throughput and the cell-edge throughput of proposed schemes with the referenced schemes, and formulate the appropriate interference management schemes applied for different scenarios.