2.50
Hdl Handle:
http://hdl.handle.net/10547/336089
Title:
Interference mitigation in Cognitive Radio based Femtocells
Authors:
Kpojime, Harold; Safdar, Ghazanfar Ali ( 0000-0001-8969-1044 )
Abstract:
Femtocell architecture involves the use of two separate layers – the macrocell and femtocell layers. In this architecture, the former is the conventional cellular network whereas the latter incorporates a range of shorter range cells. Femtocells are designed to co-exist alongside macrocells providing spatial frequency reuse, higher spectrum efficiency and cover areas where macrocells cannot. Femtocells positioned in the macrocell considerably improve the indoor coverage and provide better user experience. However, interference between the two layers is imminent; therefore ways to manage it must be employed to efficiently avoid problems such as coverage holes in the macrocells. Essential limits of capacity and attainable data rates also mainly depend on the interference faced by a femtocell network. Recently, Cognitive Radio (CR) which has the ability to sense its environment and accordingly alter its characteristics, e.g. transmission parameters, has been merged with femtocells to exploit the capabilities of the former in the latter. CR enabled femtocells in a two tier network can sense the environment and opportunistically allocate both licensed and unlicensed frequency bands to user equipments to avoid interference. This paper examines interference mitigation in femtocells using CR and provides comprehensive survey of different CR enabled interference mitigation schemes. Presented schemes such as power control, spectrum access, antenna and joint schemes are classified before they are compared for pros and cons. Finally tradeoffs and cost of using CR in femtocells are highlighted with some insight into future research issues and challenges.
Citation:
Kpojime, H.O., Safdar, G.A.(2014) 'Interference Mitigation in Cognitive Radio based Femtocells', Communications Surveys & Tutorials, IEEE , PP (99): 1
Publisher:
IEEE
Journal:
IEEE Communications Surveys & Tutorials
Issue Date:
2014
URI:
http://hdl.handle.net/10547/336089
DOI:
10.1109/COMST.2014.2361687
Additional Links:
http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6919262
Type:
Article
Language:
en
ISSN:
1553-877X
Appears in Collections:
Centre for Wireless Research (CWR)

Full metadata record

DC FieldValue Language
dc.contributor.authorKpojime, Harolden
dc.contributor.authorSafdar, Ghazanfar Alien
dc.date.accessioned2014-11-25T13:27:15Z-
dc.date.available2014-11-25T13:27:15Z-
dc.date.issued2014-
dc.identifier.citationKpojime, H.O., Safdar, G.A.(2014) 'Interference Mitigation in Cognitive Radio based Femtocells', Communications Surveys & Tutorials, IEEE , PP (99): 1en
dc.identifier.issn1553-877X-
dc.identifier.doi10.1109/COMST.2014.2361687-
dc.identifier.urihttp://hdl.handle.net/10547/336089-
dc.description.abstractFemtocell architecture involves the use of two separate layers – the macrocell and femtocell layers. In this architecture, the former is the conventional cellular network whereas the latter incorporates a range of shorter range cells. Femtocells are designed to co-exist alongside macrocells providing spatial frequency reuse, higher spectrum efficiency and cover areas where macrocells cannot. Femtocells positioned in the macrocell considerably improve the indoor coverage and provide better user experience. However, interference between the two layers is imminent; therefore ways to manage it must be employed to efficiently avoid problems such as coverage holes in the macrocells. Essential limits of capacity and attainable data rates also mainly depend on the interference faced by a femtocell network. Recently, Cognitive Radio (CR) which has the ability to sense its environment and accordingly alter its characteristics, e.g. transmission parameters, has been merged with femtocells to exploit the capabilities of the former in the latter. CR enabled femtocells in a two tier network can sense the environment and opportunistically allocate both licensed and unlicensed frequency bands to user equipments to avoid interference. This paper examines interference mitigation in femtocells using CR and provides comprehensive survey of different CR enabled interference mitigation schemes. Presented schemes such as power control, spectrum access, antenna and joint schemes are classified before they are compared for pros and cons. Finally tradeoffs and cost of using CR in femtocells are highlighted with some insight into future research issues and challenges.en
dc.language.isoenen
dc.publisherIEEEen
dc.relation.urlhttp://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=6919262en
dc.rightsArchived with thanks to IEEE Communications Surveys & Tutorialsen
dc.subjectcognitive radioen
dc.subjectfemtocellsen
dc.subjectinterferenceen
dc.subjectlong term evolutionen
dc.subjectpower controlen
dc.subjectinterference mitigationen
dc.subjectspectrum accessen
dc.titleInterference mitigation in Cognitive Radio based Femtocellsen
dc.typeArticleen
dc.identifier.journalIEEE Communications Surveys & Tutorialsen
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