Utility-Based Subchannel Allocation for OFDMA Femtocell Networks

Kim, Byung-Gook; Kwon, Jeong-Ahn; Lee, Jang-Won

doi:10.1109/icccn.2011.6006068

Cited by 10 publications

(4 citation statements)

References 13 publications

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“…This approach assumes large cells, an assumption that is not valid here. Finally, the twostep spectrum allocation algorithm proposed in [33] uses the instantaneous channel information in deriving femtocells' utilities while coloring the graph resulting in increased complexity and signalling overhead.…”

Section: Step 3: Channel Allocation Among Aps Using Graph Coloringmentioning

confidence: 99%

Partially-Distributed Resource Allocation in Small-Cell Networks

Sadr

Adve

2014

IEEE Trans. Wireless Commun.

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We propose a four-stage hierarchical resource allocation scheme for the downlink of a large-scale small-cell network in the context of orthogonal frequency-division multiple access (OFDMA). Since interference limits the capabilities of such networks, resource allocation and interference management are crucial. However, obtaining the globally optimum resource allocation is exponentially complex and mathematically intractable. Here, we develop a partially decentralized algorithm to obtain an effective solution. The three major advantages of our work are: 1) as opposed to a fixed resource allocation, we consider load demand at each access point (AP) when allocating spectrum; 2) to prevent overloaded APs, our scheme is dynamic in the sense that as the users move from one AP to the other, so do the allocated resources, if necessary, and such considerations generally result in huge computational complexity, which brings us to the third advantage: 3) we tackle complexity by introducing a hierarchical scheme comprising four phases: user association, load estimation, interference management via graph coloring, and scheduling. We provide mathematical analysis for the first three steps modeling the user and AP locations as Poisson point processes. Finally, we provide results of numerical simulations to illustrate the efficacy of our scheme.Comment: Accepted on May 15, 2014 for publication in the IEEE Transactions on Wireless Communication

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Section: Step 3: Channel Allocation Among Aps Using Graph Coloringmentioning

confidence: 99%

Partially-Distributed Resource Allocation in Small-Cell Networks

Sadr

Adve

2014

IEEE Trans. Wireless Commun.

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“…Since Q-function is a monotonically decreasing function, the outage probability lowers with a larger beamforming gain Ψ j and a smaller mean ξ and variance 2 . The outage probability increases with a smaller S q m , i.e., stricter SIR requirement of γ q m .…”

Section: Equal Selection Policymentioning

confidence: 99%

“…Considering the jth beamforming transmission, I ij denotes the crosstier interference to MUE by HeNB i's beamforming transmission with gain Ψ j . Then the distribution of I ij has the mean of ξ/Ψ j and variance of (/Ψ j ) 2 . The mean and variance of S…”

Section: Appendix 11: Equal Selection Policymentioning

confidence: 99%

“…The coexistence of macrocell and femtocell networks at a same spectrum, however, incurs additional control challenges due to the cross-tier interference between macrocell and femtocells as well as the co-tier interference. Although the co-tier interference control has been extensively studied in the literature [2][3][4][5][6][7], the cross-tier interference control still has been an open problem and remains as a key technical challenge [1,8].…”

Section: Introductionmentioning

confidence: 99%

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A decentralized spectrum allocation and partitioning scheme for a two-tier macro-femtocell network with downlink beamforming

Ryoo

Joo

Bahk

2012

J Wireless Com Network

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This article examines spectrum allocation and partitioning schemes to mitigate cross-tier interference under downlink beamforming environments. The enhanced SIR owing to beamforming allows more femtocells to share their spectrum with the macrocell and accordingly improves overall spectrum efficiency. We first design a simplified centralized scheme as the optimum and then propose a practical decentralized algorithm that determines which femtocells to use the full or partitioned spectrum with acceptable control overhead. To exploit limited information of the received signal strength efficiently, we consider two types of probabilistic femtocell base station (HeNB) selection policies. They are equal selection and interference weighted selection policies, and we drive their outage probabilities for a macrocell user. Through performance evaluation, we demonstrate that the outage probability and the cell capacity in our decentralized scheme are significantly better than those in a conventional cochannel deployment scheme. Furthermore, we show that the cell utility in our proposed scheme is close to that in the centralized scheme and better than that in the spectrum partitioning scheme with a fixed ratio.

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Fairness Guaranteed Cooperative Resource Allocation in Femtocell Networks

Wang

et al. 2013

Wireless Pers Commun

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Utility-Based Subchannel Allocation for OFDMA Femtocell Networks

Cited by 10 publications

References 13 publications

Partially-Distributed Resource Allocation in Small-Cell Networks

Partially-Distributed Resource Allocation in Small-Cell Networks

A decentralized spectrum allocation and partitioning scheme for a two-tier macro-femtocell network with downlink beamforming

Fairness Guaranteed Cooperative Resource Allocation in Femtocell Networks

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