The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In orthogonal frequency division multiple access (OFDMA) based femtocell networks, the co-tier interference among femto base stations(FBS) becomes important in multiuser and densely deployed environment. In order to mitigate the co-tier interference and enhance the system total throughput, this paper proposed a best effort spectrum allocation scheme based on the extension of graph theory. In the scheme,...
To alleviate the cross-tier interference in two-tier Orthogonal Frequency Division Multiple Access (OFDMA) femtocell networks, this article put forward a distributed utility-based downlink power control algorithm. We firstly modeled the objective of power control with utility functions for macrocell and femtocell based on the factor of Area Spectral Efficiency (ASE). Then we developed a power control...
This paper addresses how to optimize the radio coverage area of OFDMA femtocell networks in enterprise deployment. Considering some basic requirements of coverage, including coverage holes, coverage overlaps, area spectral efficiency (ASE) and load balancing, the coverage optimization problem is modeled as a Multiple Attribute Decision Making (MADM) problem. Then the MADM-based coverage optimization...
This paper addresses the cross-tier interference mitigation problem in two-tier OFDMA femtocell networks using power control. We model the objective of power control with utility functions for macrocell and femtocell, respectively. And we discuss the existence of optimal solutions to power control problems. Then a power control algorithm with Differential Evolution (DE) is developed to find the optimal...
This paper addresses the power control problem in two-tier OFDMA femtocell networks to alleviate the cross-tier interference. We model the objective of power control with utility function, and proof the proposed utility function is strictly concave with respect to transmission power. Then a power control algorithm with Particle Swarm Optimization is developed to find the optimal power settings to...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.