Ecole d'ingénieur et centre de recherche en Sciences du numérique

Stay or switch? Analysis and comparison of delays in cognitive radio networks with interweave and underlay spectrum access

Mehmeti, Fidan; Spyropoulos, Thrasyvoulos

MSWIM 2016, 19th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems, November 13-17, 2016, Malta, Malta

Cognitive Networks have been proposed to opportunistically discover and exploit licensed spectrum bands, in which the secondary users' (SU) activity is subordinated to primary users (PU). Depending on the nature of interaction between the SU and PU, there are two frequently encountered types of spectrum access: underlay and interweave. While a lot of research effort has been devoted to each mode, there is no clear consensus about which type of access performs better in different scenarios and for different metrics. To this end, in this paper we approach this question analytically, and provide closed-form expressions that allow one to compare the performance of the two types of access under a common network setup. We focus on the average delay as the key metric, which we analyze using queueing theory. This allows an SU to decide when one type of access technique provides better performance, as a function of the metric of interest and key network parameters. What is more, based on this analysis, we propose a dynamic (hybrid) policy, that can decide at any point to switch from one type of access to the other, offering up to 50% of additional performance improvement, compared to the optimal " static " policy in the scenario at hand. We provide extensive validation results using a wide range of realistic simulation scenarios.

Document Doi Bibtex

Titre:Stay or switch? Analysis and comparison of delays in cognitive radio networks with interweave and underlay spectrum access
Mots Clés:Cognitive radio networks, Markov chains, Interweave, Underlay
Type:Conférence
Langue:English
Ville:Malta
Pays:MALTE
Date:
Département:Systèmes de Communication
Eurecom ref:5025
Copyright: © ACM, 2016. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in MSWIM 2016, 19th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems, November 13-17, 2016, Malta, Malta http://dx.doi.org/10.1145/2989250.2989265
Bibtex: @inproceedings{EURECOM+5025, doi = {http://dx.doi.org/10.1145/2989250.2989265}, year = {2016}, title = {{S}tay or switch? {A}nalysis and comparison of delays in cognitive radio networks with interweave and underlay spectrum access}, author = {{M}ehmeti, {F}idan and {S}pyropoulos, {T}hrasyvoulos}, booktitle = {{MSWIM} 2016, 19th {ACM} {I}nternational {C}onference on {M}odeling, {A}nalysis and {S}imulation of {W}ireless and {M}obile {S}ystems, {N}ovember 13-17, 2016, {M}alta, {M}alta}, address = {{M}alta, {MALTE}}, month = {11}, url = {http://www.eurecom.fr/publication/5025} }
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