Research On Coordinated Of Heterogeneous Network Interference PICO Deployment Of LTE-Advanced System

With the continuous development of mobile communications and global users increasing,data rates of the existing mobile communication systems that can provide for users still cannot meet the growing demand for multimedia data services,and with the introduction of low-power base stations,make the interference structure of the cell more complex.We focus on improving the rate of cell edge and low-power node users.It is a challenge to interference control of the cell.Therefore,this thesis makes an extensive and in-depth research on control channel interference coordination Pico deployment for LTE-A system.First of all,this thesis briefly introduces the basic concept of LTE and LTE-A system and theirs evolution,after that the key technologies of them are introduced,such as the classic scheduling algorithms,the carrier aggregation technology,relay technology,coordinative multiple point and femto cell etc in detail.Secondly,this thesis introduces the research of control channel interference coordination Pico deployment for LTE-A system.There are fractional frequency reuses,sector selection based on bias and power control etc.We illustrate the working principle of several kinds of schemes and analyze the advantages and disadvantages of them.The scheme of coordination power control interference is simulated,the scheme is verified by analyzing the simulation results and comparing with each other.Third,expounds the working principle of the soft frequency reuse,according to the LTE-A system simulation method and scenario assumes,combined with the simulation parameters,design and build the simulation platform of LTE system is presented.The simulation of soft frequency reuse interference coordination works,and we bases on statistics and comparison of simulation results to validate the schemeFinally,this thesis introduces and analyses the heterogeneous network control channel interference coordination scheme in LTE-A system,analysis of the working principle and the advantages and disadvantages of the time shifting and frequency shrinking,etc.It validates the frequency shrinking scheme,and the core idea of the scheme is to take the corresponding interference coordination schemes for reducing the control channel interference and improving overall system performance according to the different conditions of the macro and Pico eNBs.After that we conclude summarize the interference coordination schemes and the future works.