Dynamic Resource Allocation in Hybrid Access Femtocell Network

Afaz Uddin Ahmed,Mohammad Tariqul Islam,Mohammad Ghanbarisabagh,Mahamod Ismail

doi:10.1155/2014/539720

Afaz Uddin Ahmed, Mohammad Tariqul Islam + Show 2 more

Open Access

https://doi.org/10.1155/2014/539720

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Abstract

Intercell interference is one of the most challenging issues in femtocell deployment under the coverage of existing macrocell. Allocation of resources between femtocell and macrocell is essential to counter the effects of interference in dense femtocell networks. Advances in resource management strategies have improved the control mechanism for interference reduction at lower node density, but most of them are ineffective at higher node density. In this paper, a dynamic resource allocation management algorithm (DRAMA) for spectrum shared hybrid access OFDMA femtocell network is proposed. To reduce the macro-femto-tier interference and to improve the quality of service, the proposed algorithm features a dynamic resource allocation scheme by controlling them both centrally and locally. The proposed scheme focuses on Femtocell Access Point (FAP) owners' satisfaction and allows maximum utilization of available resources based on congestion in the network. A simulation environment is developed to study the quantitative performance of DRAMA in hybrid access-control femtocell network and compare it to closed and open access mechanisms. The performance analysis shows that higher number of random users gets connected to the FAP without compromising FAP owners' satisfaction allowing the macrocell to offload a large number of users in a dense heterogeneous network.

Highlights

Cellular operators these days aim to provide higher number of multimedia contents to attract the new generation customers to increase their revenue
Femtocell Access Point (FAP) only allows a distinct number of users in hybrid access that confirms a higher throughput than the open access
The dynamic level resource-allocation scheme presented in this paper changes the environment of the network operation rapidly based of the users’ congestion

Summary

Introduction

Cellular operators these days aim to provide higher number of multimedia contents to attract the new generation customers to increase their revenue. In the case of closed access, only particular users get access to the FAP, avoiding unwanted traffic congestion and possible interferences. In this case, the QoS is guaranteed at the expense of decreasing spectral efficiency. In [19] a resource-allocation technique in OFDMA femtocell network was considered with instantaneous FAPs power control mechanism for a target SINR. Authors in [24] considered a joined centralizeddistributed approach for resource allocation in an open access cochannel femtocell network where the level of users was not distinguished. Design a dynamic resource-allocation scheme for cochannel hybrid access-control femtocell network [25].

System Analysis and Modeling

Simulation Result

Findings

Conclusion