Interference Management Scheme for Co-channel Femtocells

Khwandah, Sinan; Cosmas, John; Zaharis, Zaharias D.; Lazaridis, Pavlos I.; Glover, Ian; Saleh, Shadi

doi:10.23919/iconac.2018.8749067

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…Interference management is a crucial aspect in two-tier Macro-Femto networks, since co-tier and inter-tier interference may become a performance limiting factor if not properly dealt with [12], [13]. A cognitive radio (CR) based resource allocation scheme has been proposed by [14] that is shown to maximize the Femtocell throughput by minimizing intertier interference.…”

Section: Related Workmentioning

confidence: 99%

User Association, Power Control and Channel Access Schemes for Two-Tier Macro-Femto Networks: CDF of SINR Analysis

Ghosh¹

2021

Preprint

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<div>In the rapid development of wireless communications Femtocells provide tremendous improvement in coverage and quality of service for users. Macro-Femto based networks are envisioned to be the de-facto solution for providing ultrahigh speed communications in next generation mobile wireless networks. This paper studies two-tier Macro-Femto networks and proposes a collection of novel technologies to address the interference problems. First, a novel user association scheme is proposed that aims to optimize the load among Femto base stations (FBSs). Second, a near-optimal ergodic search algorithm is proposed to regulate the power consumption at Macro base stations (MBSs) and improve energy efficiency. Third, a channel access mechanism is proposed for FBSs that aims to minimize inter-tier interference. For the proposed system, CDF of SINR is derived and used for performance investigation. Simulation results show that the proposed system can significantly outperform a popular, conventional cognitive radio based system for all the considered simulation scenarios.</div>

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Section: Related Workmentioning

confidence: 99%

User Association, Power Control and Channel Access Schemes for Two-Tier Macro-Femto Networks: CDF of SINR Analysis

Ghosh¹

2021

Preprint

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“…Thus Femtocells are a timely and important research topic and require much more research to show their potential performance gain in downlink and uplink transmissions. Interference management is a crucial aspect in two-tier Macro-Femto networks, since co-tier and inter-tier interference may become a performance limiting factor if not properly dealt with [12], [13]. A cognitive radio (CR) based resource allocation scheme has been proposed by [14] that is shown to maximize the Femtocell throughput by minimizing intertier interference.…”

Section: Related Workmentioning

confidence: 99%

User Association, Power Control and Channel Access Schemes for Two-Tier Macro-Femto Networks: CDF of SINR Analysis

Ghosh

Gupta

Hacı

et al. 2020

IETE Technical Review

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In the rapid development of wireless communications Femtocells provide tremendous improvement in coverage and quality of service for users. Macro-Femto based networks are envisioned to be the de-facto solution for providing ultrahigh speed communications in next generation mobile wireless networks. This paper studies two-tier Macro-Femto networks and proposes a collection of novel technologies to address the interference problems. First, a novel user association scheme is proposed that aims to optimize the load among Femto base stations (FBSs). Second, a near-optimal ergodic search algorithm is proposed to regulate the power consumption at Macro base stations (MBSs) and improve energy efficiency. Third, a channel access mechanism is proposed for FBSs that aims to minimize inter-tier interference. For the proposed system, CDF of SINR is derived and used for performance investigation. Simulation results show that the proposed system can significantly outperform a popular, conventional cognitive radio based system for all the considered simulation scenarios.

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“…By designing an appropriate distance, density as a ratio, and bandwidth allocation between three technologies to find the best cell location for high throughput. Furthermore, an adaptive power control for cochannel femtocells is presented in this paper [5]. To avoid co-channel interference, femtocells must detect the presence of macro users in their surroundings.…”

Section: Introductionmentioning

confidence: 99%

Proportional Fairness for Long-Term Evolution-Licensed Assisted Access (LTE-LAA) with Wi-Fi Coexistence in Unlicensed Spectrum

Azita Laily Yusof,

Nurul Nadia Mokhtar,

Nur Haidah Mohd Hanapiah

et al. 2024

ARASET

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Long-Term Evaluation-Licensed Assisted Access (LTE-LAA) has good potential for fair coexistence with Wi-Fi in an unlicensed spectrum. Though the LTE-LAA utilizes the same listen before-talk technique as the distributed coordination function in IEEE 802.11, it utilizes completely different parameters and transmission durations. For this reason, a fair coexistence between LTE-LAA and Wi-Fi leaves an open question on how the LTE-LAA network should choose its parameters. To tackle this issue, an analytical framework considering the effects of varying important parameters, which are the different initial back-off window sizes, the numbers of sensing durations, the maximum back-off stages, the number of retransmissions and the transmission opportunities for LTE-LAA and Wi-Fi nodes on their performances has been developed. The node and network airtime performances are evaluated by using the current standard parameters setting to see how this setting affects the node and network airtime performances. From there, optimal settings of the initial backoff window size and number of sensing durations are applied by using the obtained node airtime equation that is derived from the Markov renewal process and evaluated as functions of system parameters. The optimum initial backoff window size and number of sensing durations of LTE-LAA are evaluated and verified by the calculation and simulation using MATLAB software. The analysis shows that LTE-LAA maintained unfair coexistence with Wi-Fi by using the current standard parameter setting as its initial back off window size or sensing duration. But in contrast, using the optimum initial backoff window size and number of sensing durations of LTE-LAA shows that they can maintain proportional fairness. It is unconcealed that the initial backoff window size tuning of LTE-LAA carries a high possibility of achieving fairness because it needs less system data and achieves a higher exactness result.

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Interference Management Scheme for Co-channel Femtocells

Cited by 4 publications

References 2 publications

User Association, Power Control and Channel Access Schemes for Two-Tier Macro-Femto Networks: CDF of SINR Analysis

User Association, Power Control and Channel Access Schemes for Two-Tier Macro-Femto Networks: CDF of SINR Analysis

User Association, Power Control and Channel Access Schemes for Two-Tier Macro-Femto Networks: CDF of SINR Analysis

Proportional Fairness for Long-Term Evolution-Licensed Assisted Access (LTE-LAA) with Wi-Fi Coexistence in Unlicensed Spectrum

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