Analysis And Study On LTE Inter-cell Interference

With OFDM's introduction into LTE system,both uplink of SC-FDMA and downlink of OFDMA are adopted to ensure the intra-cell orthogonality among subscribers and have successfully eliminated the intra-cell interference.Nevertheless,on one hand,the requirements of broadband mobile communication for spectrum efficiency show that,as per LTE system,it doesn't work properly for interference control if we keep at using inter-cell frequency reuse like in traditional cellular network.On the other hand,the same frequency networking brings about more serious inter-cell same frequency interference.Therefore,in LTE system,the inter-cell interference suppression becomes the top priority.The cell bearer service,associated closely with occurrence of inter-cell interference,features differently with different location.So,understanding of category,parameter,density of bearer service and their relation with interference plays an important role in inter-cell interference control,network scheme and design.This paper is aimed at deeper study on inter-cell interference in LTE system.On the ground of accomplished theoretical analysis,we adopt OPNET simulation platform for system level simulation and make the detailed analysis and description regarding the simulation result.First,the discussion and analysis are unfolded with the causes and classification of interference,followed by the scene simulation through OPNET platform.The statistics data to collect will be confirmed along with the interference impact is being manifested and analyzed via the simulation data.Then,the relation between service bearer and interference is addressed and simulatedly tested from three perspectives of category,parameter and density concerning the relevant data service.The paper is finally closed with the study on how to suppress inter-call interference,as well as with the introduction and comparison of several typical suppression technologies,among which ICIC is explicitly classified.Moreover,this paper represents the performance improved by soft frequency reuse in way of establishing the system level simulation scene of soft frequency reuse system via OPNET platform.