DocumentCode :
586107
Title :
Cluster-Based Resource Allocation for Interference Mitigation in LTE Heterogeneous Networks
Author :
Tang, Hao ; Hong, Peilin ; Xue, Kaiping ; Peng, Jinlin
Author_Institution :
EEIS Dept., USTC, Hefei, China
fYear :
2012
fDate :
3-6 Sept. 2012
Firstpage :
1
Lastpage :
5
Abstract :
In order to provide high data rate for indoor services, femtocells are proposed in LTE-Advanced system. Under this architecture, the main problem is how to reduce the interference between macro and femto cells and that among femtocells. In this paper, an interference graph is constructed in which the vertexes are Macro User (MUE) and femtocell. Besides, Regional Average Channel State (RACS) metric is proposed to estimate the weight of interference. Therefore, a dynamic spectrum assignment algorithm called hybrid clustering based on interference graph (HCIG) is proposed to reduce the interference, in which the optimal clustering problem is constructed as a MAX-K cut problem and a heuristic algorithm is given. Based on the cluster results, a resource allocation scheme is given to reduce the interference and improve the spectrum efficiency. System level simulation results show that compared to other three schemes, the SINR of both MUE and femto user are improved by HCIG.
Keywords :
Long Term Evolution; femtocellular radio; graph theory; interference suppression; pattern clustering; resource allocation; HCIG; LTE-Advanced system; Long Term Evolution heterogeneous networks; MUE; RACS metric; SINR; dynamic spectrum assignment algorithm; femtocells; heuristic algorithm; hybrid clustering based on interference graph; interference mitigation; macro cells; macro user; max-k cut problem; regional average channel state metric; resource allocation scheme; spectrum efficiency improvement; system level simulation; Clustering algorithms; Femtocells; Heuristic algorithms; Interference; Macrocell networks; Resource management; Signal to noise ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference (VTC Fall), 2012 IEEE
Conference_Location :
Quebec City, QC
ISSN :
1090-3038
Print_ISBN :
978-1-4673-1880-8
Electronic_ISBN :
1090-3038
Type :
conf
DOI :
10.1109/VTCFall.2012.6398901
Filename :
6398901
Link To Document :
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