Resource allocation in integrated femto–macrocell networks based on location awareness

Hashem Kalbkhani; Vahid Solouk; Mahrokh G. Shayesteh

Resource allocation in integrated femto–macrocell networks based on location awareness

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Author(s): Hashem Kalbkhani ¹ ; Vahid Solouk ² ; Mahrokh G. Shayesteh ^{1, 3}
- Affiliations: 1: Department of Electrical Engineering, Urmia University, Urmia, Iran;
  2: Department of IT and Computer Engineering, Urmia University of Technology, Urmia, Iran;
  3: Electrical Engineering Department, Wireless Research Laboratory, ACRI, Sharif University of Technology, Tehran, Iran
Source: Volume 9, Issue 7, 07 May 2015, p. 917 – 932
DOI: 10.1049/iet-com.2014.0691 , Print ISSN 1751-8628, Online ISSN 1751-8636

Received 02/10/2013, Accepted 17/12/2014, Revised 23/10/2014, Published 12/03/2015

This study presents an efficient fractional frequency reuse scheme for macrocell network which uses six directional antennas to cover the outer region and analyses the performance. Cross-tier interference between macrocell and femtocell networks leading to throughput and outage probability degradation is a major issue in two-tier networks when femtocells are deployed in co-channel with macrocells. In this study, the received interference from the macrocell network to femtocell network is analysed. Then, based on the degree of received interference, an algorithm for orthogonal resource allocation to femtocells with low cross-tier interference is presented. According to the introduced scheme, macrocell uses all resource blocks along with a portion of the spectrum allocated to femtocell while both networks operate simultaneously. Closed-form expressions for downlink throughput and outage probability of femtocells are also attained as well as the throughput of macrocell network. The results demonstrate that the proposed hierarchical cellular network achieves higher throughput and lower outage probability for femtocell when compared to other hierarchical macro–femto cellular networks.

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