Distributed Power Control in Femtocell-Underlay Cellular Networks

Chandrasekhar, Vikram; Andrews, Jeffrey G.; Shen, Zukang; Muharemovic, Tarik; Gatherer, Alan

doi:10.1109/glocom.2009.5425923

Cited by 42 publications

(19 citation statements)

References 17 publications

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“…The paper derives a relation which provides the largest feasible cellular SINR values if a set of feasible SINR values for femtocells are given. In order to reduce the cross tier interference, a distributed utility based SINR approach at the femtocell BS is also proposed, where the power of femtocells causing strong interference is gradually reduced [113]. A distributed dynamic Inter Cell Interference (ICI) avoidance (DDIA) scheme is proposed in [114].…”

Section: ) Interference Avoidance In Femtocellsmentioning

confidence: 99%

Interference Management in Femtocells

Zahir

Arshad

Nakata

et al. 2013

IEEE Commun. Surv. Tutorials

323

182

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Abstract-Increase in system capacity and data rates can be achieved efficiently in a wireless system by getting the transmitter and receiver closer to each other. Femtocells deployed in the macrocell significantly improve the indoor coverage and provide better user experience. The femtocell base station called as Femtocell Access Point (FAP) is fully user deployed and hence reduces the infrastructure, maintenance and operational cost of the operator while at the same time providing good Quality of Service (QoS) to the end user and high network capacity gains. However, the mass deployment of femtocell faces a number of challenges, among which interference management is of much importance, as the fundamental limits of capacity and achievable data rates mainly depends on the interference faced by the femtocell network. To cope with the technical challenges including interference management faced by the femtocells, researchers have suggested a variety of solutions. These solutions vary depending on the physical layer technology and the specific scenarios considered. Furthermore, the cognitive capabilities, as a functionality of femtocell have also been discussed in this survey.This article summarises the main concepts of femtocells that are covered in literature and the major challenges faced in its large scale deployment. The main challenge of interference management is discussed in detail with its types in femtocells and the solutions proposed over the years to manage interference have been summarised. In addition an overview of the current femtocell standardisation and the future research direction of femtocells have also been provided.

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Section: ) Interference Avoidance In Femtocellsmentioning

confidence: 99%

Interference Management in Femtocells

Zahir

Arshad

Nakata

et al. 2013

IEEE Commun. Surv. Tutorials

323

182

View full text Add to dashboard Cite

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“…One of the limitations of handover solutions is that handover is only applicable to OSG-based or hybrid-based femtocells while the vast majority of femtocells are CSG-based. Power control can also be used to tackle the interference problem, where the femto BS can adjust its transmit power to reduce the interference to macro users [9]. However, under power control, the coverage of the femtocell may shrink to zero when the macro user is very close to the femto BS.…”

Section: Introductionmentioning

confidence: 98%

Downlink Spectrum Allocation for Macro-Femto Networks

Cao

Sooriyabandara

Fan

2013

2013 IEEE 77th Vehicular Technology Conference (VTC Spring)

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In this paper, a new spectrum allocation method is proposed to address the downlink interference problem in heterogeneous macro-femto networks, where distributed femtocells coexist with macrocells. In practical heterogeneous macro-femto networks, normally there is no direct link between a macro base station and a femto base station, and any communication between the two has to be via the backhaul and hence delay-tolerant. Meanwhile, due to wide deployment of distributed femtocells, the signaling overhead via the backhaul should be kept as low as possible. To this end, this paper comes up with a dynamic fractional frequency reuse and dynamic resource allocation scheme to tackle the interference problem, taking into consideration the delay-tolerance and low overhead requirements. Performance evaluation results have demonstrated the benefits of the proposed scheme.

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“…Game theory, a branch of mathematics, studying the interactions among several autonomous subjects with contrasting interests and the outcome, can be well used in femtocell networks. The works in [10,11,12] investigate several power control schemes from a game-theoretical point of view.…”

Section: Introductionmentioning

confidence: 99%

Interference mitigation in two-tier OFDMA femtocell networks: A potential game approach

Xia

Feng

et al. 2012

2012 International Conference on Wireless Communications and Signal Processing (WCSP)

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The problem of interference mitigation in two-tier downlink orthogonal frequency division multiple access (OFDMA) femtocell networks is considered in this paper. We propose a potential game based distributed power control algorithm, aiming at maximizing the users' SINRs and improving the system capacity. With a penalty factor in system capacity as a utility function for macrocell and femtocell, a global optimization problem then turns into a local optimization problem with multiiterations. Based on gradient projection response criterion, dynamically rational power allocation for each resource block is performed, achieving the coordination of interference between macrocell and femtocell and increasing system capacity. Simulation results show that the proposed scheme effectively reduces the system capacity loss and improves the throughput of macrocell users with minor performance degradation of the femtocell users. Moreover, the proposed scheme is easy to implement in a decentralized manner.

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Distributed Power Control in Femtocell-Underlay Cellular Networks

Cited by 42 publications

References 17 publications

Interference Management in Femtocells

Interference Management in Femtocells

Downlink Spectrum Allocation for Macro-Femto Networks

Interference mitigation in two-tier OFDMA femtocell networks: A potential game approach

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