NDLI: Dynamic femtocell resource allocation for managing inter-tier interference in downlink of heterogeneous networks

Content Provider	IET Digital Library
Author	Saeed, Arsalan Katranaras, Efstathios Dianati, Mehrdad Imran, Muhammad Ali
Abstract	This study investigates the downlink resource allocation problem in orthogonal frequency division multiple access heterogeneous networks consisting of macrocells and femtocells sharing the same frequency band. The focus is to devise optimised policies for femtocells' access to the shared spectrum, in terms of femtocell transmissions, in order to maximise femto-users (FUEs) sum data rate while ensuring that certain level of quality of service (QoS) for the macro-cell users in the vicinity of femtocells is provided. The optimal solution to this problem is obtained by employing the well-known dual Lagrangian method and the optimal femtocell transmit power and resource allocation solution is derived in detail. However, the optimal solution introduces high computational complexity. To this end, a heuristic solution to the problem is proposed. The algorithms to implement both optimal and efficient suboptimal schemes in a practical system are also given in detail while their complexity is compared. Simulation results show that proposed dynamic resource allocation scheme (a) ensures the macro-users QoS requirements compared with the Reuse-1 scheme, where femtocells are allowed to transmit at full power and bandwidth; (b) can maintain FUE data rates at high levels; (c) provides performance close to the optimal solution, while introducing much lower complexity.
Starting Page	641
Ending Page	650
Page Count	10
ISSN	17518628
Volume Number	10
e-ISSN	17518636
Issue Number	Issue 6, Apr (2016)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-com/10/6
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-com.2015.0153
Journal	IET Communications
Publisher Date	2016-04-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Communication Complexity Computational Complexity Downlink Resource Allocation Problem Dual Lagrangian Method Dynamic Femtocell Resource Allocation Electromagnetic Compatibility Femto-users Sum Data Rate Maximisation Femtocell Transmissions Femtocellular Radio Frequency Division Multiple Access FUE Sum Data Rate Maximisation Interference Interference Suppression Intertier Interference Management Macrocell User Mobile Radio System Modulation And Coding Method Multiple Access Communication OFDM Modulation Optimal Femtocell Transmit Power Optimisation Optimisation Technique Orthogonal Frequency Division Multiple Access Heterogeneous Network QoS Quality of Service Radio Link Radio Spectrum Management Real Time System Resource Allocation Spectrum Sharing Suboptimal Scheme
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering Computer Science Applications

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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