Interference analysis and novel fractional frequency reuse scheme in LTE networks
LIU Li-na1, ZHU Gang1, WANG Liang2
1.State Key Laboratory of Rail Traffic Control and Safety,Beijing Jiaotong University,Beijing 100044, China;2.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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Interference analysis and novel fractional frequency reuse scheme in LTE networks
本站小编 哈尔滨工业大学/2019-10-23
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