Paper Info
Title
Outage performance of downlink communications in cognitive-based two-tier networks: cooperative and non-cooperative femtocells.
Abstract
Femtocell deployment, which is a promising approach to the coverage and capacity improvement of indoor communications, suffers from cross-tier interference. Therefore to make the femtocell technology practical this issue needs to be addressed appropriately. One serious type of cross-tier interference occurs in downlink communication, in which a macrocell user is located far from its macro base station. In this setup, the communication of the adjacent femto access points with their users makes the macrocell user experience a low SINR. This paper considers this scenario and shows how cognitive-enabled femto access points can cope with cross-tier interference. More precisely, we compute the outage probability of macro users in a two-tier network when femto access points use the energy detection-based spectrum sensing technique to find the unoccupied frequency subband. To improve the outage probability of macro users, we also study the effectiveness of cooperation among neighbor femto access points. In all cases, the analytical expressions are validated by computer simulations which confirm the accuracy of the used approximations.
Year
DOI
Venue
2018
10.1007/s11276-017-1492-3
Wireless Networks
Keywords
Field
DocType
Cognitive radio, Outage probability, Two-tier networks, Cooperative communication, Downlink connection, Spectrum sensing
Femto-,Femtocell,User experience design,Computer science,Computer network,Interference (wave propagation),Macro,Macrocell,Distributed computing,Telecommunications link,Cognitive radio
Journal
Volume
Issue
ISSN
24
7
1572-8196
Citations 
PageRank 
References 
0
0.34
37
Authors
3
Name
Order
Citations
PageRank
Zolfa Zeinalpour-Yazdi1457.47
Ehsan Koleini200.34
Banitalebi, B.300.68