Efficient Resource Allocation with Improved Interference Mitigation in FFR-Aided OFDMA Heterogeneous Networks

Sani Umar Abdullahi; Jian Liu; Seyed Alireza Mohadeskasaei

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Efficient Resource Allocation with Improved Interference Mitigation in FFR-Aided OFDMA Heterogeneous Networks

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摘要

Fractional frequency reuse(FFR)has recently emerged as an efficient inter-cell interference coordination technique for orthogonal frequency division multiple access(OFDMA)based multi-tier cellular networks due to its low complexity,minimal signaling over-head,and coverage improvement.In this work,an intermediary region(IR)at the border of the center region(CR)and edge region(ER)is defined,which prevents severe cross-tier interference and is usually ignored by other schemes.Furthermore,a strategic resource allocation scheme is proposed,which allows macro users in this new region to be served more resources due to their good channel conditions close to the serving base station(BS),while femto users are assigned resource blocks from sub-bands that receive the least net interference from a set of usable sub-bands in any region.We find by analysis and simulation the optimal threshold for IR,which minimizes the cross-tier interference,and show that the femto throughput is also maximized for this threshold.Numerical results show the proposed scheme outperforms other notable schemes in terms of throughput and outage performances.

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《电子科技学刊：英文版》 |2019年第1期|P.73-89|共17页
作者
Sani Umar Abdullahi; Jian Liu; Seyed Alireza Mohadeskasaei;
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作者单位

[1]School of Computer and Communication Engineering;

University of Science and Technology Beijing;

Beijing 100083;

China;

[1]School of Computer and Communication Engineering;

University of Science and Technology Beijing;

Beijing 100083;

China;

[1]School of Computer and Communication Engineering;

University of Science and Technology Beijing;

Beijing 100083;

China;

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原文格式 PDF
正文语种 CHI
中图分类无线电电子学、电信技术;
关键词
Femto cells; fractional frequency reuse(FFR); heterogeneous network; interference management; macro cells; resource allocation;

机译：毫微微小区;分数频率重用（FFR）;异构网络;干扰管理;宏小区;资源分配;

Efficient Resource Allocation with Improved Interference Mitigation in FFR-Aided OFDMA Heterogeneous Networks

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