Modelling And Interference Analysis Of Lte Heterogeneous Network

To fulfill the increasing requirement for data traffic,3GPP has put forward the conception of heterogeneous network. Due to the low power nodes introduced in traditional homogeneous network, the capacity and coverage performances of LTE network increase tremendously. However, a severe problem of interference exists in heterogeneous network, and thus has attracteda wide concern. Presently, many studies merely focus on the regular HetNet deployment proposed by3GPP, interference mitigation in realistic network is rarely considered in present literatures.After having investigated techniques of eICIC、IRC、cell range extension etc., this thesis explores their applications in realistic LTE network. The major jobs are listed as follows:1. Traditional eICIC algorithm has the problem of relatively long configurationperiod. Accordingly, taking full account of diverse users’ distribution, an adaptive method referred as fast ABS is employed. Simulation results reveal that in most cases base stations are configured with ABS ratio less than4:8, implying a smaller part of users in extension range.2. A user-based information report method is proposed in realistic network. It reports the victims to relevant aggressors, thus the serving celf may interact with two or more macro sites simultaneously. The user-based report measure is applicable for both realistic and3GPP-defined networks.3. This paper also analyzes the influence factors of interference in Chapter5. Simulation presents that network deployment、traffic load and cell range extension impacts interference conditions at different levels. 4. Performances of IRC、CRS-IC、fast ABS and cell range extension are analyzed in details based on the system level simulation.