Inter-Cell Interference Coordination Using Fractional Frequency Reuse Scheme in Multi-Relay Multi-Cell OFDMA Systems

2018 ◽  
Author(s):  
Ali M. Saleh ◽  
Ngon T. Le ◽  
Abu B. Sesay
Keyword(s):  
Frequency Reuse ◽  
Fractional Frequency Reuse ◽  
Interference Coordination ◽  
Fractional Frequency ◽  
Inter Cell Interference

scholarly journals Hungarian Mechanism based Sectored FFR for Irregular Geometry Multicellular Networks

2021 ◽  
Vol 9 (2) ◽  
pp. 313-325
Author(s):  
Rahat Ullah ◽  
Zubair Khalid ◽  
Fargham Sandhu ◽  
Imran Khan
Keyword(s):  
Cellular Networks ◽  
Frequency Reuse ◽  
Fractional Frequency Reuse ◽  
Fractional Frequency ◽  
Achievable Throughput ◽  
User Simulation ◽  
Sum Rate ◽  
Irregular Geometry ◽  
The Individual ◽  
Inter Cell Interference

The growing demands for mobile broadband application services along with the scarcity of the spectrum have triggered the dense utilization of frequency resources in cellular networks. The capacity demands are coped accordingly, however at the detriment of added inter-cell interference (ICI). Fractional Frequency Reuse (FFR) is an effective ICI mitigation approach when adopted in realistic irregular geometry cellular networks. However, in the literature optimized spectrum resources for the individual users are not considered. In this paper Hungarian Mechanism based Sectored Fractional Frequency Reuse (HMS-FFR) scheme is proposed, where the sub-carriers present in the dynamically partitioned spectrum are optimally allocated to each user. Simulation results revealed that the proposed HMS-FFR scheme enhances the system performance in terms of achievable throughput, average sum rate, and achievable throughput with respect to load while considering full traffic.

scholarly journals IMPACTO DEL REUSO DE FRECUENCIA FRACCIONAL EN LA REDUCCIÓN DE INTERFERENCIA INTERCELDA EN LTE.

2014 ◽  
Vol 25 (1) ◽  
pp. 28-39
Author(s):  
Betty Nayibe Fernández Campo ◽  
Lesly Alejandra González Camacho ◽  
Claudia Milena Hernández Bonilla
Keyword(s):  
Density Function ◽  
Long Term Evolution ◽  
Frequency Reuse ◽  
Band Width ◽  
Fractional Frequency Reuse ◽  
Cumulative Density Function ◽  
Interference Coordination ◽  
Term Evolution ◽  
Inter Cell Interference

La Interferencia Inter-Celda (ICI, Inter-Cell Interference) es un problema que desafía el desempeño de las redes Evolución a Largo Término (LTE, Long Term Evolution), sin embargo existen técnicas de Coordinación de Interferencia Inter-Celda (ICIC, Inter-Cell Interference Coordination) como el Reuso de Frecuencia Fraccional (FFR, Fractional Frequency Reuse) que permiten mitigar dicha interferencia y mejorar el desempeño de los Equipos de Usuario (UE, User Equipment), especialmente aquellos terminales situados en el borde de la celda. Este artículo analiza el desempeño de la técnica Reuso de Frecuencia Fraccional (FFR) en LTE, en función de dos parámetros de configuración: Umbral de Relación Señal a Ruido más Interferencia (SINR, Signal to Interference plus Noise Ratio) y partición de Ancho de Banda (BW, Band Width). Se evalúa la capacidad e interferencia mediante diagramas de dispersión, curvas de Función de Probabilidad Acumulada Empírica (ECDF, Empirical Cumulative Density Function) y cálculos estadísticos.

scholarly journals LTE Network Analysis in Frequency Reuse Recycling Techniques

2021 ◽  
Vol 29 (1) ◽  
Author(s):  
Muhammad Sabir Hussain ◽  
Nasri Suleiman ◽  
Nor Kamariah Noordin
Keyword(s):  
Frequency Distribution ◽  
Frequency Reuse ◽  
Fractional Frequency Reuse ◽  
Fractional Frequency ◽  
A Cell ◽  
Promising Solution ◽  
User Throughput ◽  
Inter Cell Interference ◽  
Improve Device ◽  
Recycling Techniques

In recent years, several researchers have embraced fractional frequency (FF) reuse as a strategy for resolving the inter-cell and co-channel interferences of adjacent cells (ICI, CCI) as the number of wireless networks grows. This technique is focused on the cell division of two parts, the inner and the outer, which enables multiple frequency bands to be assigned. The frequency advantages can be completely used in each inner zone, since there is no inter-cell disturbance for consumers in inner regions. According to this effective usage of the frequency spectrum available, FF will reduce the interruption of the channel and improve device efficiency. This manuscript presents a comprehensive study of different mechanisms to select the optimal FF scheme based on the user throughput. The analysis was conducted in order to obtain the optimal internal and external range for the cells as well as the optimal frequency distribution between the areas of the FR, Fractional Frequency Reuse 1 (FFR1) and Fractional Frequency Reuse 2 (FFR2) and evaluating their outputs and their number of users. In detail the overall consumer efficiency through the configured frequency distribution is analyzed. The FFR is a resource allocation technique that can effectively mitigate inter-cell interference (ICI) in LTE based HetNets and it is a promising solution. The proposal also employs high number sectors in a cell, low interference and good frequency reuse. The processes are tested by way of multiple modeling simulations.

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