Subchannel allocation for the OFDMA-based femtocell system

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

doi:10.1016/j.comnet.2013.08.008

Cited by 7 publications

(10 citation statements)

References 19 publications

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“…In [19], a chordal graph approach is used to estimate the amount of resources to be granted to each femtocell and resource allocation among femtocells is performed based on greedy graph coloring. Fairness is further guaranteed by using a logarithmic utility function to maximize data rate.…”

Section: Related Workmentioning

confidence: 99%

“…When each HeNB receives the amount of resources it requires for its GBR and non-GBR flows, the resource allocation is said to be globally fair [1]. However, most of the related work in [7]- [17], [19], [20] only considered the GBR class. To ensure a high level of global fairness, it is crucial to ensure that each HeNB has its minimum resource demand satisfied for the GBR flows, and be provided with a fair amount of resources for the non-GBR flows.…”

Section: Introductionmentioning

confidence: 99%

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Fair Resource Allocation With Interference Mitigation and Resource Reuse for LTE/LTE-A Femtocell Networks

Lee

Loo

Chuah

et al. 2016

IEEE Trans. Veh. Technol.

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Joint consideration of interference, resource utilization, fairness and complexity issues is generally lacking in existing resource allocation schemes for Long Term Evolution (LTE)/LTE-Advanced femtocell networks. To tackle this, we employ a hybrid spectrum allocation approach whereby the spectrum is split between the macrocell and its nearby interfering femtocells based on their resource demands, while the distant femtocells share the entire spectrum. A multi-objective problem is formulated for resource allocation between femtocells and is decomposed using a lexicographic optimization approach into two subproblems. A reasonably low-complexity greedy algorithm is proposed to solve these subproblems sequentially. Simulation results show that the proposed scheme achieves substantial throughput and packet loss improvements in low-density femtocell deployment scenarios while performing satisfactorily in high-density femtocell deployment scenarios with substantial complexity and overhead reduction. The proposed scheme also performs nearly as well as the optimal solution obtained by exhaustive search.

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Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fair Resource Allocation With Interference Mitigation and Resource Reuse for LTE/LTE-A Femtocell Networks

Lee

Loo

Chuah

et al. 2016

IEEE Trans. Veh. Technol.

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“…As the split spectrum approach is simpler than the shared spectrum approach, a number of efficient resource allocation schemes have been developed for this approach [4][5][6][7][8][9][10][11][12]. In [4], a random hashing function is used to avoid allocating the same resources to interfering femtocells.…”

mentioning

confidence: 99%

“…However, global fairness is not addressed in [8] and resource utilization maximization is not considered in [9]. Graph coloring techniques are used in [10] and [11] to avoid co-tier interference and to maximize throughput, but global fairness is not considered because the techniques do not take into account the resource demands of the HeNBs. In [12], a clustering method is used to group interfering femtocells and avoid resource reuse within the group.…”

mentioning

confidence: 99%

Multi-objective Resource Allocation for LTE/LTE-A Femtocell/HeNB Networks Using Ant Colony Optimization

Lee

Loo

Chuah

et al. 2016

Wireless Pers Commun

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Existing femtocell resource allocation schemes for Long Term Evolution (LTE) or LTE-Advanced femtocell networks do not jointly achieve efficient resource utilization, fairness guarantee, interference mitigation and reduced complexity in a satisfactory manner. In this paper, a multi-objective resource allocation scheme is proposed to achieve these desired features simultaneously. We first formulate three objective functions to respectively maximize resource utilization efficiency, guarantee a high degree of fairness and minimize interference. A weighted sum approach is then used to combine these objective functions to form a single multi-objective optimization problem. An ant colony optimization algorithm is employed to find the Pareto-optimal solution to this problem. Simulation results demonstrate that the proposed scheme performs jointly well in all aspects, namely resource utilization, fairness and interference mitigation. Additionally, it maintains satisfactory performance in the handover process and has a reasonably low complexity compared to the existing schemes.

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“…Several time and frequency scheduling schemes based on vertex coloring have been proposed for wireless communications [12]. To the best of our knowledge, no vertex coloring based scheduling research has been carried out for PLC.…”

Section: Introductionmentioning

confidence: 99%

Vertex Coloring based Slot Reuse Scheduling for Power Line Communications

Yoon¹

2015

Journal of Electrical Engineering and Technology

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-Power line communication (PLC) is one of the major communication technologies in smart grid since it combines good communication capability with easy and simple deployment. As a power network can be modeled as a graph, we propose a vertex coloring based slot reuse scheduling in the time division multiple access (TDMA) period for PLCs. Our objective is to minimize the number of assigned time slots, while satisfying the quality of service (QoS) requirement of each station. Since the scheduling problem is NP-hard, we propose an efficient heuristic scheduling, which consists of repeated vertex coloring and slot reuse improvement algorithms. The simulation results confirm that the proposed algorithm significantly reduces the total number of time slots.

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Subchannel allocation for the OFDMA-based femtocell system

Cited by 7 publications

References 19 publications

Fair Resource Allocation With Interference Mitigation and Resource Reuse for LTE/LTE-A Femtocell Networks

Fair Resource Allocation With Interference Mitigation and Resource Reuse for LTE/LTE-A Femtocell Networks

Multi-objective Resource Allocation for LTE/LTE-A Femtocell/HeNB Networks Using Ant Colony Optimization

Vertex Coloring based Slot Reuse Scheduling for Power Line Communications

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