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Supervised by Ministry of Industry and Information Technology of The People's Republic of China Sponsored by Harbin Institute of Technology Editor-in-chief Yu Zhou ISSNISSN 1005-9113 CNCN 23-1378/T

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Related citation:LIU Li-na,ZHU Gang,WANG Liang.Interference analysis and novel fractional frequency reuse scheme in LTE networks[J].Journal of Harbin Institute Of Technology(New Series),2012,19(4):104-109.DOI:10.11916/j.issn.1005-9113.2012.04.018.
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Interference analysis and novel fractional frequency reuse scheme in LTE networks
Author NameAffiliation
LIU Li-na State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044, China 
ZHU Gang State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044, China 
WANG Liang China Mobile Group Heilongjiang Co., LTD Mulan Branch,Harbin 150001, China 
Abstract:
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.
Key words:  LTE  ICI  interference management  parameter analysis  FFR
DOI：10.11916/j.issn.1005-9113.2012.04.018
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