Soft frequency reuse based interference minimization technique for long term evolution-advanced heterogeneous networks

Malini, B.; Babu, K. Vinoth

doi:10.1109/iccsp.2017.8286434

Cited by 7 publications

(13 citation statements)

References 11 publications

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“…The restriction is on the power allocation. 22 For the SFR cell center users can use two third of the total bandwidth and cell edge users can use one third of it. In the cell center band, resource blocks are allocated lower transmission power because cell center user shares the same bandwidth with cell edge of the neighboring cells.…”

Section: Related Workmentioning

confidence: 99%

“…Cell edge UEs can access to cell edge bandwidth while cell center UEs can access to the cell center bandwidth and can access to the cell edge bandwidth but with less priority than cell edge UEs. The restriction is on the power allocation 22 . For the SFR cell center users can use two third of the total bandwidth and cell edge users can use one third of it.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic resource allocation and interference coordination for millimeter wave communications in dense urban environment

Yağcıoğlu¹

2022

Trans Emerging Tel Tech

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Inter cell interference coordination (ICIC) strategies in cellular systems have vital importance for spectrum efficiency in dense urban networks. Frequency reuse and resource allocation approaches are used to overcome the interference and the efficiency problems. Users in the cell edge suffer from low throughput and signal to interference plus noise ratio. Although increasing the transmit power of the BS can be considered as a solution, it also causes ICI. Considering these difficulties, we propose a technique called Experience Based Dynamic Soft Frequency Reuse in the 5G millimeter-wave (mmWave) at 28 GHz band.The first objective of the proposed technique is to minimize the inter cell interference by using Soft Frequency Reuse method. The technique also aims to increase the overall system throughput by using Dynamic Channel Allocation.The third objective is to progress a fairness scheduler algorithm among users by optimizing the base station schedulers, which we call Experience-Based Packet Scheduler. The main purpose of this article is to find the best value for α in order to maximize the average user and cell edge user throughput while considering the users' fairness. Simulations and numerical results show that the proposed algorithm can achieve up to 30% higher performance in terms of the average user throughput rates and has better fairness for lower α values (0.3 and 0.4).

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Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic resource allocation and interference coordination for millimeter wave communications in dense urban environment

Yağcıoğlu¹

2022

Trans Emerging Tel Tech

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“…Typically, 2/3 of the available bandwidth are allocated to the inner region of each cell [30]. However, the bandwidth assigned to each region can vary from cell to cell according to the employed scheduling algorithm [35]- [37]. Moreover, a reuse radius, R s , (or threshold distance) is used to delimitate inner and outer regions of each cell.…”

Section: A System Modelmentioning

confidence: 99%

“…Other works use SFR and sectorization as model to propose scheduling algorithms to reduce CCI. These works go beyond the scope of this paper, but some references are provided for the reader [35]- [37]. Again, perfect sectorization is assumed in these works, which does not happen in real scenarios due to radiation pattern of commercial antennas.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Non-Ideal Sectorized SFR Cellular Systems in Rician Fading Channels With Unbalanced Diversity

et al. 2020

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Nowadays, low reuse factors are used in cellular systems because of high traffic demand, despite it produces high co-cell interference (CCI) levels. Consequently, soft-frequency-reuse (SFR) and sectorization are used to improve the spectral efficiency and to mitigate CCI. In addition, diversity techniques are necessary for a good system performance. Motivated by this scenario, for the uplink of orthogonal-frequency-division multiple access (OFDMA) systems, the bit error rate (BER) and the cellular spectral efficiency using multilevel-quadrature-amplitude-modulation (M-QAM) and maximalratio-combining (MRC) in Rician fading channels are analyzed, where diversity branches have different Rician K-factors (unbalanced diversity). SFR is used assuming non-ideal sectorized cells due to the irregular radiation pattern of base station antennas. An exact integral-form expression and a closed-form upper-bound to evaluate the BER are obtained. In addition, an algorithm, and an expression to calculate the cellular spectral efficiency are presented considering that a target BER must be guaranteed for all users in the cell. From the analysis, it is determined that the BER can be reduced and the spectral efficiency can be improved if some system operating parameters are selected in an adequate manner. Thus, it was noticed that the number of diversity branches, the sum of the K factors of these branches, and the antenna type, are decisive to guarantee the target BER and to maximize the cellular spectral efficiency.

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“…In 2019, Huawei, Hong Kong Telecom (HKT) and the Global Mobile Suppliers Association (GSA) jointly released the "Indoor 5G Scenario White Paper", which pointed out that: with the development of communication technology and the continuous increase in the number of users, more than 80% of the future communication Services will take place indoors. In order to ensure high-speed and highefficiency communications, indoor coverage has become an application scenario that needs to be considered in mobile communications [1][2]. The indoor distributed antenna system is a technology to achieve indoor coverage, and its system architecture is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

The application of automatic power control based on FPGA in digital remote unit

Liu¹,

Gao²,

He³

et al. 2023

International Conference on Signal Processing and Communication Technology (SPCT 2022)

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In the indoor distributed antenna system, the uplink and downlink of the digital remote unit combine the multi-carrier and output, and the signal power increases after the combination. When the output power is greater than the maximum limit of the system, it may cause damage to the analog devices in the system and output wrong signals. Since the uplink and downlink are respectively oriented to the digital expansion unit and the RF analog unit, power control needs to be performed for different links respectively. Therefore, an FPGA-based uplink and downlink automatic power control technical scheme is proposed. By counting the digital signal power at different times, a short-time automatic power control module suitable for uplink and a short-time automatic power control module suitable for downlink are designed respectively. Long-time automatic power control module, which effectively solves the problem that the signal power exceeds the system threshold after combining, and ensures that the power of the output signal is basically stable. At the same time, the DSP resources are time-division multiplexed according to the multiple relationship between the sampling rate and the clock frequency, which optimizes the consumption of DSP resources. After simulation and actual test on the board, the results show that the control accuracy of the uplink output power is ≤±0.5dB, and the maximum attenuation of 8dB can be achieved. The downlink output power control accuracy is ≤±1dB, the maximum attenuation is 22dB, and the DSP resource consumption is reduced by 50% after time division multiplexing.

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Soft frequency reuse based interference minimization technique for long term evolution-advanced heterogeneous networks

Cited by 7 publications

References 11 publications

Dynamic resource allocation and interference coordination for millimeter wave communications in dense urban environment

Dynamic resource allocation and interference coordination for millimeter wave communications in dense urban environment

Performance Analysis of Non-Ideal Sectorized SFR Cellular Systems in Rician Fading Channels With Unbalanced Diversity

The application of automatic power control based on FPGA in digital remote unit

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