Interference analysis and novel fractional frequency reuse scheme in LTE networks  

作　　者：刘丽娜 朱刚 王亮 

机构地区：[1]State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University [2]China Mobile Group Heilongjiang Co.,LTD Mulan Branch

出　　处：《Journal of Harbin Institute of Technology(New Series)》2012年第4期104-109,共6页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by the Program for Changjiang Scholars and Innovative Research Team in University(Grant No.IRT0949);the Fundamental Research Funds for the Central Universities(Grant No.2010JBZ008),the Fundamental Research Funds for the Central Universities(Grant No.KWJB10006536);the Joint Funds of State Key Program of NSFC(Grant No.60830001);the State Key Laboratory of Rail Traffic Control and Safety(Grant No.RCS2008ZZ007)

摘　　要：Inter-cell interference (ICI) mitigation is always a challenge issue in LTE system. In this paper, several common interference parameters are firstly analyzed for both cell edge users and center users, and then a novel fractional frequency reuse (FFR) architecture based on interference avoidance scheme coupled with power control is proposed to solve the problem of interference management in multi-cell LTE environment. The scheme divides the whole sub-carriers into three groups orthogonally. One is allocated to cell edge users, while another two are assigned to cell center users with different transmitter power. Then a parameter named interference avoidance factor (IAF) is defined to avoid ICI and adjust the number of allocated sub-carriers to match the number of users. The parameter also takes weight factor and fairness factor into consideration. The simulation results show the proposed scheme can improve the performance of cell edge users obviously.Inter-cell interference （ICI） mitigation is always a challenge issue in LTE system. In this paper, several common interference parameters are firstly analyzed for both cell edge users and center users, and then a novel fractional frequency reuse （FFR） architecture based on interference avoidance scheme coupled with power control is proposed to solve the problem of interference management in multi-cell LTE environment. The scheme divides the whole sub-carriers into three groups orthogonally. One is allocated to cell edge users, while another two are assigned to cell center users with different transmitter power. Then a parameter named interference avoidance factor （IAF） is defined to avoid ICI and adjust the number of allocated sub-carriers to match the number of users. The parameter also takes weight factor and fairness factor into consideration. The simulation results show the proposed scheme can improve the performance of cell edge users obviously.

关 键 词：LTE ICI interference management parameter analysis FFR 

分 类 号：TN92[电子电信—通信与信息系统]