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Bandwidth Partitioning and SINR Threshold Analysis of Fractional Frequency Reuse in OFDMA Cellular Networks for Real Time and Best Effort Traffic

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Abstract

To achieve high capacity in cellular networks, frequency reuse factor of unity is used. However, it suffers from heavy co-channel interference at cell edge regions. This leads to poor Signal to Interference plus Noise Ratio (SINR) and hence poor performance. fractional frequency reuse (FFR) is one of the methods being considered to improve cell edge performance. In this work we present the impact of SINR threshold and bandwidth partitioning on the successful deployment of FFR scheme. We have considered both real time (RT) and best effort (BE) traffic. In FFR, the total frequency resource is divided logically into cell center and cell edge user bands. However, while frequency resource is partitioned into two segments, the amount of bandwidth required by cell center and cell edge users is quite different and influences the system performance. We developed the semi analytical approach to evaluate the average bandwidth required by cell center and edge band users. From the analysis and simulation results it is seen that while grade of service (GoS) fair based method of choosing bandwidth partitioning ratio is best for RT traffic, while the only feasible method for BE traffic is dividing the bandwidth based on probability of a user to be in a given band which we termed as ‘Probability’ method.

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Authors and Affiliations

  1. Indian Institute of Technology, Kharagpur, India

    Subba Rao Boddu, Atri Mukhopadhyay, Bigi Vargheese Philip, Suvra Sekhar Das & Ratnam V. Rajakumar

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  1. Subba Rao Boddu
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  2. Atri Mukhopadhyay
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  3. Bigi Vargheese Philip
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  4. Suvra Sekhar Das
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  5. Ratnam V. Rajakumar
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Correspondence to Subba Rao Boddu.

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Boddu, S.R., Mukhopadhyay, A., Philip, B.V. et al. Bandwidth Partitioning and SINR Threshold Analysis of Fractional Frequency Reuse in OFDMA Cellular Networks for Real Time and Best Effort Traffic. Wireless Pers Commun 75, 325–347 (2014). https://doi.org/10.1007/s11277-013-1365-8

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  • DOI: https://doi.org/10.1007/s11277-013-1365-8

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