A New Enhanced Coordinated Multi-Point (CoMP) Transmission Design for Cancelling Inter-cell Interference for Cell-Edge Users Using Superimposed Supporting Signals

In OFDMA networks, the use of universal frequency reuse plans improves cell capacity but causes very high levels of inter-cell interference (ICI), particularly affecting users located in the cell-edge regions.In order to mitigate ICI while achieving high spectral efficiencies, fractional frequency reuse (FFR) shows a good tradeoff between cell-edge throughput and overall cell spectral efficiency.Recently, multi-layer FFR-aided OFDMA-based designs, splitting the cell into inner, middle and outer layers have been proposed and studied with the aim of increasing the spectrum utilization and improving the user fairness throughout the cell.This paper presents an analytical framework allowing the performance evaluation and optimization of multi-layer FFR designs in OFDMA-based networks.Tractable mathematical expressions of the average cell throughput as well as the layer spectral efficiency have been derived for both proportional fair (PF) and round robin (RR) scheduling policies.

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MULTI-HOP CELLULAR NETWORKS FOR MOBILITY LOAD BALANCING AND INTER-CELL INTERFERENCE COORDINATION USING OFDMA WITH IMPROVED CELL-EDGE SPECTRAL EFFICIENCY

i-manager s Journal on Mobile Applications and Technologies ◽

10.26634/jmt.2.4.6050 ◽

2016 ◽

Vol 2 (4) ◽

pp. 33

Author(s):

LAKSHMIKANTH P.S. ◽

LEELA RANI D ◽

GEETHA P ◽

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...

Keyword(s):

Load Balancing ◽

Cellular Networks ◽

Spectral Efficiency ◽

Interference Coordination ◽

Cell Edge ◽

Inter Cell Interference

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Inter-cell Interference Management Technique for Multi-Cell LTE-A Network

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v7i5.pp2696-2705 ◽

2017 ◽

Vol 7 (5) ◽

pp. 2696

Author(s):

Iskandar Iskandar ◽

I. Setyawan ◽

H. Nuraini

Keyword(s):

Interference Management ◽

High Capacity ◽

Frequency Reuse ◽

Spectrum Efficiency ◽

Management Technique ◽

Single Input Single Output ◽

Downlink Transmission ◽

Cell Edge ◽

Single Output ◽

Inter Cell Interference

In modern cellular system such as LTE Advanced (LTE-A), frequency reuse scheme is targeted to be applied to fulfill the requirement of high capacity broadband access and high spectrum efficiency. But this kind of frequency planning may lead to the worse inter-cell interference (ICI) level experienced especially by a user located at the cell edge. Soft Frequency Reuse (SFR) is considered as an effective way to mitigate inter-cell interference and maintain capacity. We propose a power division SFR, known as multi level SFR technique to minimize ICI in a designed LTE-A network for sub-urban environment. Service area of LTE-A network was first developed to deploy particular number of eNB by using LTE network planning tools in the frequency of 1800 MHz with the use of SISO (Single Input Single Output) antennas. Coverage dimensioning and propagation consideration determine LTE-A parameters which were used in the simulation. Monte carlo simulation is executed to examine the performance of SFR for LTE-A downlink transmission to address different power ratio and traffic loads problem. Both performance of cell edge users and overall cell performance are evaluated in terms of CINR, BLER, and throughput. Performance with SFR is also compared with the classical frequency reuse one and three.

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Inter-cell interference mitigation for cell edge users

2013 Fourth International Conference on Computing, Communications and Networking Technologies (ICCCNT) ◽

10.1109/icccnt.2013.6726579 ◽

2013 ◽

Author(s):

R. Rajesh ◽

K. Muruganandam

Keyword(s):

Interference Mitigation ◽

Cell Edge ◽

Inter Cell Interference

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Study of Handover Techniques for 4G Network MIMO Systems

International Journal of Communications ◽

10.46300/9107.2021.15.3 ◽

2021 ◽

Vol 15 ◽

pp. 10-16

Author(s):

Jian-Sing Wang ◽

Jeng-Shin Sheu

Keyword(s):

Mimo Systems ◽

Multiple Input Multiple Output ◽

Cellular Systems ◽

Frequency Reuse ◽

Fractional Frequency Reuse ◽

Cell Edge ◽

Network Mimo ◽

Input Multiple Output ◽

Inter Cell Interference ◽

4G Systems

For the upcoming 4G systems, network multiple-input multiple-output (MIMO) and inter-cell interference coordination (ICIC) are two of key techniques adopted in 4G systems to mitigate the serious inter-cell interference (ICI) and improve coverage and cell-edge throughput. Network MIMO is referred to as coordinated multi-point (CoMP) in LTE-A. In this paper, we propose a simulation platform to analyze the handover issue for downlink CoMP transmissions in LTE-A cellular systems. Among the variety of ICIC strategies, we apply the widely adopted soft frequency reuse (SFR) and the fractional frequency reuse (FFR) schemes. Both schemes are based on the idea of applying a frequency reuse factor of one in cell-center areas, and a higher reuse factor in cell-edge areas. Therefore, the ICI is reduced at the expense of the available frequency resources for each cell.

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An Improved Precoding Algorithm for LTE-Advanced CoMP System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.427-429.2519 ◽

2013 ◽

Vol 427-429 ◽

pp. 2519-2522

Author(s):

Qiong Wang ◽

Zhao Xia Zhang ◽

Jia Liu

Keyword(s):

Performance Improvement ◽

Block Diagonalization ◽

Communication Quality ◽

Zero Forcing ◽

Cell Edge ◽

Lte Advanced ◽

Simulation Results ◽

Noise Ratio ◽

Inter Cell Interference

In LTE-Advanced (LTE-A) system, coordinated multi-point (CoMP) technology can reduce inter-cell interference effectively, and improve the communication quality of the cell edge users. The main purpose of this paper is to optimize the precoding algorithm and enhance the overall cell throughput in LTE-A CoMP downlink. Based on CoMP-JP, we focus on zero-forcing (ZF), block diagonalization (BD) and signal-to-leakage-plus-noise-ratio (SLNR). We propose an improved precoding algorithm (ZF-SLNR) which combines the advantages of ZF and SLNR . Simulation results suggest that ZF-SLNR algorithm provides appreciable performance improvement.

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Soft Frequency Reuse (SFR) in LTE-A Heterogeneous Networks based upon Power Ratio Evaluation

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v8i3.pp1569-1576 ◽

2018 ◽

Vol 8 (3) ◽

pp. 1569

Author(s):

Alvita Maurizka ◽

F. Hamdani ◽

M. M. Ulfah ◽

Iskandar Iskandar

Keyword(s):

User Experience ◽

Heterogeneous Networks ◽

Heterogeneous Network ◽

Mobile Network ◽

Frequency Reuse ◽

Power Ratio ◽

Traffic Demand ◽

Cell Edge ◽

Link Budget ◽

Inter Cell Interference

As the traffic demand grows and the RF environment changes, the mobile network relies on techniques such as SFR in Heterogeneous Network (HetNet) to overcome capacity and link budget limitation to maintain user experience. Inter-Cell Interference (ICI) strongly affecting Signal-to-Interference plus Noise Ratio (SINR) of active UEs, especially cell-edge users, which leads to a significant degradation in the total throughput. In this paper we evaluate the performance of SFR with HetNet system in order dealing with interferences. Simulation result shows that the power ratio control in SFR HetNet system doesn’t have much effect on total achieved capacity for overall cell.

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