Research On Mobility Related And Inter-Cell Interference Coordination On Heterogeneous Network In LTE-Advanced System

The third generation mobile communication technology at present in the globalscope has become the mainstream system deployment and operation of most of theoperators, the user experience has been great to meet. However the user experiencecommunication costs down, now expect in exchange for a higher quality service forless money, which requires us to improve the system performance at the same time, toreduce the complexity of the deployment of the system, but also reduce theconsumption of system maintenance. The LTE-A project is to emerge as the timesrequire in this environment. However, the new features of the LTE-A system usinglow power node area brings some problems. Especially in the user equipment is onthe move, many algorithms and parameters in homogeneous networks are no longerapplicable. At the same time, the inter-cell interference is more serious, the cell edgeuser experience decreased sharply, this will affect the performance of fairness forusers of LTE-A system and the whole system, so the heterogeneous network underinterference suppression technology research has become a hotspot in the field ofcommunications.The UE mobility related algorithm and interference suppression in two aspects oftechnology research, the main contents include:1.For discontinuous reception technology in heterogeneous network system due tothe low power node coverage area is relatively small, switching allows the delay isshort, may lead to measurement related UE mobility, handoff signaling transfer failurecases of large, thereby moving more serious problems related parameters areisomorphic network. The modeling of DRX characteristics of heterogeneous networkin the system simulation platform, add the DRX module. The statistics of the samesimulation assumes that the DRX characteristic parameters of premise isomorphismand heterogeneous network system after introducing mobility related parameters, theDRX technology in heterogeneous network system deterioration degree of moderateconclusion. 2.According to the UE mobile state evaluation algorithm of traditional UEevaluation problem of high speed in the heterogeneous network system, two improvedalgorithms are proposed respectively in the system simulation platform for modelingand statistics of the three algorithms and the evaluation results in homogeneousnetwork of traditional algorithm, two kinds of algorithms are good after to solve theabove problems, and the final results are close to traditional MSE in homogeneousnetwork.3.The current methods for inter-cell interference coordination exists inheterogeneous network system in the environment after the interference coordinationmeasures to decrease the system capacity problems, put forward a kind of user locationinter-cell interference coordination based on the algorithm, and the model of the newalgorithm in system simulation platform, the simulation results of the improvedalgorithm and the traditional the results show that the improved algorithm is given, thethroughput of interference coordination algorithm for edge users than the traditionalalgorithm is improved about20%, the overall system throughput is improved about5%.