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Dynamic spectrum allocation scheme for heterogeneous network

Hasan, Mohammad Kamrul and Ismail, Ahmad Fadzil and Islam, Shayla and Hashim, Wahidah and Pandey, Bishwajeet (2017) Dynamic spectrum allocation scheme for heterogeneous network. Wireless Personal Communications, 95 (2). pp. 299-315. ISSN 0929-6212

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Abstract

Recently, femtocells (HeNBs) are deployed in heterogeneous network (HetNets) attributable to the addition of coverage, capacity and impeccable spectrum efficiency in private buildings/office complexes surroundings. This unplanned placement of HeNBs creates co-channel interference (CCI) in orthogonal frequency division multiple access (OFDMA). As a result service, disruption occurred at the macrocell user and femtocell user. Therefore, with always expanding interest for frequency spectrum, there is have to make available more resource allocation in order to permit more quantities of unlicensed clients to transmit their signals in the authorized groups. Cognitive-based approaches may increase the spectrum efficiency by sharing resources opportunistically from unlicensed/licensed network. However, spectrum management processes quite difficult, and a lot of chance to occur interference at the cell-edge users. Therefore, a dynamic spectrum allocation scheme is proposed for OFDMA based HetNets. The proposed scheme efficiently reduces the interferences through subchannel detection. To accomplish the CCI mitigation, the proposed scheme is functioning using the energy exposure with group creation algorithm for subchannel detection. Finally, the detected subchannel is allocated through applying power allocation algorithm. The simulation results represent that proposed scheme is able to maximize the spectrum detection and enhanced the spectral efficiency. The improved spectral efficiency recuperates the CCI situation at underlay HetNets.

Item Type: Article (Journal)
Additional Information: 5068/54489
Uncontrolled Keywords: Femtocell, OFDMA, MRaSD, DSA, Co-channe,l interference
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication. Including telegraphy, radio, radar, television
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering > Department of Electrical and Computer Engineering
Depositing User: Ir. Dr. Ahmad Fadzil Ismail
Date Deposited: 23 Jan 2017 14:32
Last Modified: 18 Apr 2018 16:35
URI: http://irep.iium.edu.my/id/eprint/54489

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