Next Article in Journal
Enhanced Thermal Properties of Zirconia Nanoparticles and Chitosan-Based Intumescent Flame Retardant Coatings
Previous Article in Journal
Towards Reconfigurable Electronics: Silicidation of Top-Down Fabricated Silicon Nanowires
Open AccessArticle

Handover-Driven Interference Management for Co-Channel Deployment of Femto- and Macro-Cells

Department of Electrical and Information Engineering, Seoul National University of Science and Technology, Seoul 01811, Korea
Appl. Sci. 2019, 9(17), 3463; https://doi.org/10.3390/app9173463
Received: 1 August 2019 / Revised: 17 August 2019 / Accepted: 20 August 2019 / Published: 22 August 2019
(This article belongs to the Section Electrical, Electronics and Communications Engineering)
Femtocell technology has been gaining popularity as an inexpensive means of enhancing cellular coverage and capacity. However, under co-channel deployment—expected to be commonplace due to high spectrum costs—femtocells may incur harmful interference to existing macrocells, and vice versa. To alleviate this problem, This paper proposes a new architecture called HandOver-driven Femtocell Interference Management (HO-FIM) that offloads macrocells by handing macrocell users over to “hybrid-access” femtocells that allow the access of both subscribed and unsubscribed users. This use of handovers adds a new degree-of-freedom for solving the interference problem, thus overcoming the capacity limit of the existing approaches that exploit radio resource coordination only. A new challenge associated with this approach is how to minimize handovers while reaching a desired system condition due to the inevitable service interruptions that accompany handovers. This paper proposes to overcome this challenge by triggering handovers only when needed and, once triggered, to find an optimal sequence to reach a target system condition with minimal handovers. This paper designs a greedy per-user control algorithm that has a fine control granularity and thus enables convergence to an optimal solution. The in-depth evaluation of the paper shows that HO-FIM improves the service quality of both macro- and femtocell users; in an example simulation scenario, HO-FIM is shown to improve the signal-to-interference and noise ratios (SINRs) of macro- and femtocell users by up to 23.3 and 2.9 dB, respectively, on average, compared to the case of no handovers. View Full-Text
Keywords: femtocell; interference management; handover; co-channel deployment femtocell; interference management; handover; co-channel deployment
Show Figures

Figure 1

MDPI and ACS Style

Yun, J.-H. Handover-Driven Interference Management for Co-Channel Deployment of Femto- and Macro-Cells. Appl. Sci. 2019, 9, 3463. https://doi.org/10.3390/app9173463

AMA Style

Yun J-H. Handover-Driven Interference Management for Co-Channel Deployment of Femto- and Macro-Cells. Applied Sciences. 2019; 9(17):3463. https://doi.org/10.3390/app9173463

Chicago/Turabian Style

Yun, Ji-Hoon. 2019. "Handover-Driven Interference Management for Co-Channel Deployment of Femto- and Macro-Cells" Appl. Sci. 9, no. 17: 3463. https://doi.org/10.3390/app9173463

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop