Decoupled Downlink-Uplink Coverage Analysis with Interference Management for Enriched Heterogeneous Cellular Networks

Muhammad, Fazal; Abbas, Ziaul Haq; Abbas, Ghulam; Jiao, Lei

doi:10.1109/access.2016.2613128

Cited by 25 publications

(32 citation statements)

References 23 publications

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“…In Muhammad et al, 20 RFA together with decoupled association is used to mitigate interference. The authors demonstrate that by employing the RFA scheme, edge user performance is significantly improved due to efficient utilization of spectrum.…”

Section: Related Workmentioning

confidence: 99%

Coverage analysis of cell‐edge users in heterogeneous wireless networks using Stienen's model and RFA scheme

Haroon

Abbas

Muhammad

et al. 2019

Int J Communication

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In heterogeneous wireless networks, signal-to-interference-plus-noise ratio (SINR) suffers degradation due to strong interference received by users from offloaded macro base station (mBS). Similarly, cell-edge users experience low SINR due to their distant locations. Moreover, small base stations (sBSs) located in the vicinity of mBS experience reduced coverage due to the high transmit power of mBS. To overcome these limitations, we use Stienen's model as a base station deployment strategy to improve network performance gain. More specifically, we use reverse frequency allocation (RFA) as an interference management scheme together with Stienen's model to significantly improve SINR, enhance edge user coverage, and avoid sBS deployment near the mBS. In the proposed set-up, the available coverage region is divided into two noncontiguous regions, ie, center region and outer region. Furthermore, mBSs are uniformly distributed throughout the coverage region using independent Poisson point processes, while sBSs are deployed only in outer region using Poisson hole process (PHP).Closed-form expressions for coverage probabilities are characterized for the proposed model. Numerical results show that the proposed scheme yields improved SINR with enhanced edge user coverage and requires fewer number of sBSs. KEYWORDS coverage probability, heterogeneous wireless networks, Poisson hole process, Poisson point processes, reverse frequency allocation, Stienen's model Int J Commun Syst. 2020;33:e4147.wileyonlinelibrary.com/journal/dac

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Section: Related Workmentioning

confidence: 99%

Coverage analysis of cell‐edge users in heterogeneous wireless networks using Stienen's model and RFA scheme

Haroon

Abbas

Muhammad

et al. 2019

Int J Communication

Self Cite

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“…Different resource management approaches have been proposed to mitigate downlink (DL) and UL interference, such as cell range expansion (CRE) [15], fractional frequency reuse (FFR) [16,17], soft frequency reuse (SFR) [18], and reverse frequency allocation (RFA) [19,20]. It has been investigated that, as compared with other schemes such as CRE, FFR, and SFR, RFA is spectrally more efficient due to its efficient resource utilization [19]. In RFA, UL and DL sub-carriers are used by MBSs and SBSs in reverse fashion while assuming a multi-region environment [19].…”

Section: Motivationmentioning

confidence: 99%

“…It has been investigated that, as compared with other schemes such as CRE, FFR, and SFR, RFA is spectrally more efficient due to its efficient resource utilization [19]. In RFA, UL and DL sub-carriers are used by MBSs and SBSs in reverse fashion while assuming a multi-region environment [19]. In this paper, we employ RFA to counter both JI and ICI in order to improve UL coverage.…”

Section: Motivationmentioning

confidence: 99%

Proactive Uplink Interference Mitigation in HetNets Stressed by Uniformly Distributed Wideband Jammers

Abbas

Haroon

et al. 2019

Electronics

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In heterogeneous cellular networks (HetNets), densification of small base stations (SBSs) in the macro base station (MBS) coverage region leads to improved network coverage and capacity. However, this improvement is at the cost of inter-cell interference (ICI) due to the high MBS transmit power. The situation deteriorates further when uniformly deployed wideband jammers (WBJs) to initiate distributed denial-of-service (DDoS) attacks are present. With sufficient knowledge about the network parameters, WBJs produce substantial jammer interference (JI) by transmitting unwanted energy in the legitimate band. Such jamming attacks can cause significant JI in the UL communications of MBS edge users (M-EUs) due to i) low uplink (UL) transmit power of user equipment (UE) and ii) longer distances of M-EUs. As a result of ICI and JI, M-EUs are severely affected and go off the coverage due to a low received signal-to-interference ratio (SIR). Hence, to mitigate both ICI and JI, we use a proactive resource allocation scheme known as reverse frequency allocation (RFA). The results indicate that although ICI and JI significantly degrade network performance, RFA employment leads to improved SIR due to effective ICI and JI mitigation.

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“…This yields that a cell edge region subband allocation is preplanned carefully to not interfering with its neighbor cell edge frequency. In Muhammad et al, 23 to overcome the disadvantage of coupled downlink-uplink cell association, authors proposed a solution by combining the decoupled downlink-uplink user association and fractional frequency reuse and presented the corresponding performance analysis. However, although Mahmud and Hamdi 15 and Zahid et al 16 showed that using the fractional frequency reuse scheme and dividing the macro cell into several regions can improve the performance of CEUs, these works only focused on regular and single-cell scenario.…”

Section: Introductionmentioning

confidence: 99%

“…However, for small cell, the CCU uses W 2 and CEU uses W 1 . In Muhammad et al, 23 to overcome the disadvantage of coupled downlink-uplink cell association, authors proposed a solution by combining the decoupled downlink-uplink user association and fractional frequency reuse and presented the corresponding performance analysis. From the above literature review, we can find that fractional frequency reuse is an effective solution to mitigate co-tier or cross-tier interference.…”

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confidence: 99%

Energy‐spectrum‐efficient three‐tier heterogeneous networks with D2D harvesting energy and uplink coverage analysis

Jia

Fan

et al. 2018

Int J Communication

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To guard the communication quality of cell edge users (CEUs) and simultaneously improve the energy-spectrum efficiency, a novel 3-tier heterogeneous network (HetNet) model is proposed, which consists of macro cells, femtocells, and device-to-device (D2D) networks. Specially, with a predefined cell split factor R, the macro cell users are split into as cell center users (CCUs) and CEUs, respectively. Correspondingly, the total available spectrum band consisting of N channels is divided into CCU band and CEU band with a given coefficient p m . The CCU band containing p m N subchannels is shared by CCUs and femtocell users (FUs), and the CEU band containing(1 − p m ) N subchannels is shared by D2D users and CEUs. The perfect network synchronization is assumed, and a communication round consists of downlink transmission and uplink transmission phases. The battery-free D2D terminals harvest energy from the ambient radio frequency interference in the downlink transmission phase based on inverse power control scheme and communicate in the uplink transmission phase only when they harvest enough energy to perform channel inversion toward the receiver. For such 3-tier HetNets, by modeling the network elements as independent Poisson point processes (PPPs) and using stochastic geometry method, we first investigate the sufficiency probability that a D2D transmitter harvests enough energy to establish a communication link. Then, by combining sufficiency probability and channel access probability, the thinned independent PPPs for the locations of CCUs, CEUs, FUs, and D2D users are modeled. Based on these thinned PPP models, we perform a comprehensive investigation on the coverage probabilities of CCU, CEU, and FU uplinks as well as the D2D transmission. The simulated and numerical results show that using the presented cell split strategy enhances the performance of CCUs and CEUs because of the decrease of interference. The presented comparison analysis displays that the effect of D2D networks on the macro cell or the whole HetNets is limited and can be omitted. Therefore, the energy and spectrum efficiencies of networks are enhanced, simultaneously. At the same time, our results indicate that by using our derivations, we can perform the optimal design of the HetNets. KEYWORDScell center user, cell edge user, cell split, energy harvesting, heterogeneous networks 1 | INTRODUCTION Nowadays, with the proliferation of smart phones, tablets, and data-hungry multimedia applications, there has been exponential growth in mobile data and traffic. In recent report, 1 Cisco predicts that mobile data traffic will hit an annual run rate of 367.2 exabytes by 2020. More specifically, a compound annual growth rate to the data traffic from 2015 to 2020 is 53%. The fast and continuous growing mobile data traffic causes the deficiency of cellular network capacity. To mitigate this problem and meet the exponential growth of mobile traffic, the network operators have already started to devise new solutions. An advanced approach is strongly required ...

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Decoupled Downlink-Uplink Coverage Analysis with Interference Management for Enriched Heterogeneous Cellular Networks

Cited by 25 publications

References 23 publications

Coverage analysis of cell‐edge users in heterogeneous wireless networks using Stienen's model and RFA scheme

Coverage analysis of cell‐edge users in heterogeneous wireless networks using Stienen's model and RFA scheme

Proactive Uplink Interference Mitigation in HetNets Stressed by Uniformly Distributed Wideband Jammers

Energy‐spectrum‐efficient three‐tier heterogeneous networks with D2D harvesting energy and uplink coverage analysis

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